1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
4 Free Software Foundation, Inc.
5 Derived from coffread.c, dbxread.c, and a lot of hacking.
6 Contributed by IBM Corporation.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
28 #include <sys/types.h>
31 #include "gdb_string.h"
33 #include <sys/param.h>
34 #ifdef HAVE_SYS_FILE_H
39 #include "coff/internal.h"
40 #include "libcoff.h" /* FIXME, internal data from BFD */
41 #include "coff/xcoff.h"
43 #include "coff/rs6000.h"
47 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
51 #include "stabsread.h"
52 #include "expression.h"
53 #include "complaints.h"
55 #include "gdb-stabs.h"
57 /* For interface with stabsread.c. */
58 #include "aout/stab_gnu.h"
61 /* We put a pointer to this structure in the read_symtab_private field
67 /* First symbol number for this file. */
71 /* Number of symbols in the section of the symbol table devoted to
72 this file's symbols (actually, the section bracketed may contain
73 more than just this file's symbols). If numsyms is 0, the only
74 reason for this thing's existence is the dependency list. Nothing
75 else will happen when it is read in. */
79 /* Position of the start of the line number information for this psymtab. */
80 unsigned int lineno_off;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language = language_unknown;
88 /* Simplified internal version of coff symbol table information */
93 int c_symnum; /* symbol number of this entry */
94 int c_naux; /* 0 if syment only, 1 if syment + auxent */
96 unsigned char c_sclass;
101 /* last function's saved coff symbol `cs' */
103 static struct coff_symbol fcn_cs_saved;
105 static bfd *symfile_bfd;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end;
118 /* initial symbol-table-debug-string vector length */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Nonzero if within a function (so symbols should be local,
123 if nothing says specifically). */
127 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
128 there is any reason not to just use a #define, but might as well
129 ask BFD for the size and store it here, I guess. */
131 static unsigned local_symesz;
133 struct coff_symfile_info
135 file_ptr min_lineno_offset; /* Where in file lowest line#s are */
136 file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
138 /* Pointer to the string table. */
141 /* Pointer to debug section. */
144 /* Pointer to the a.out symbol table. */
147 /* Number of symbols in symtbl. */
150 /* Offset in data section to TOC anchor. */
151 CORE_ADDR toc_offset;
155 bf_notfound_complaint (void)
157 complaint (&symfile_complaints, _("line numbers off, `.bf' symbol not found"));
161 ef_complaint (int arg1)
163 complaint (&symfile_complaints,
164 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
168 eb_complaint (int arg1)
170 complaint (&symfile_complaints,
171 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
174 static void xcoff_initial_scan (struct objfile *, int);
176 static void scan_xcoff_symtab (struct objfile *);
178 static char *xcoff_next_symbol_text (struct objfile *);
180 static void record_include_begin (struct coff_symbol *);
183 enter_line_range (struct subfile *, unsigned, unsigned,
184 CORE_ADDR, CORE_ADDR, unsigned *);
186 static void init_stringtab (bfd *, file_ptr, struct objfile *);
188 static void xcoff_symfile_init (struct objfile *);
190 static void xcoff_new_init (struct objfile *);
192 static void xcoff_symfile_finish (struct objfile *);
194 static void xcoff_symfile_offsets (struct objfile *,
195 struct section_addr_info *addrs);
197 static char *coff_getfilename (union internal_auxent *, struct objfile *);
199 static void read_symbol (struct internal_syment *, int);
201 static int read_symbol_lineno (int);
203 static CORE_ADDR read_symbol_nvalue (int);
205 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
208 static void read_xcoff_symtab (struct partial_symtab *);
211 static void add_stab_to_list (char *, struct pending_stabs **);
214 static int compare_lte (const void *, const void *);
216 static struct linetable *arrange_linetable (struct linetable *);
218 static void record_include_end (struct coff_symbol *);
220 static void process_linenos (CORE_ADDR, CORE_ADDR);
223 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
225 static int secnum_to_section (int, struct objfile *);
226 static asection *secnum_to_bfd_section (int, struct objfile *);
228 struct find_targ_sec_arg
233 struct objfile *objfile;
236 static void find_targ_sec (bfd *, asection *, void *);
239 find_targ_sec (bfd *abfd, asection *sect, void *obj)
241 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
242 struct objfile *objfile = args->objfile;
243 if (sect->target_index == args->targ_index)
245 /* This is the section. Figure out what SECT_OFF_* code it is. */
246 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
247 *args->resultp = SECT_OFF_TEXT (objfile);
248 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
249 *args->resultp = SECT_OFF_DATA (objfile);
251 *args->resultp = sect->index;
252 *args->bfd_sect = sect;
256 /* Return the section number (SECT_OFF_*) that CS points to. */
258 secnum_to_section (int secnum, struct objfile *objfile)
260 int off = SECT_OFF_TEXT (objfile);
261 asection *sect = NULL;
262 struct find_targ_sec_arg args;
263 args.targ_index = secnum;
265 args.bfd_sect = §
266 args.objfile = objfile;
267 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
271 /* Return the BFD section that CS points to. */
273 secnum_to_bfd_section (int secnum, struct objfile *objfile)
275 int off = SECT_OFF_TEXT (objfile);
276 asection *sect = NULL;
277 struct find_targ_sec_arg args;
278 args.targ_index = secnum;
280 args.bfd_sect = §
281 args.objfile = objfile;
282 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
286 /* add a given stab string into given stab vector. */
291 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
293 if (*stabvector == NULL)
295 *stabvector = (struct pending_stabs *)
296 xmalloc (sizeof (struct pending_stabs) +
297 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
298 (*stabvector)->count = 0;
299 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
301 else if ((*stabvector)->count >= (*stabvector)->length)
303 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
304 *stabvector = (struct pending_stabs *)
305 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
306 (*stabvector)->length * sizeof (char *));
308 (*stabvector)->stab[(*stabvector)->count++] = stabname;
313 /* Linenos are processed on a file-by-file basis.
317 1) xlc (IBM's native c compiler) postpones static function code
318 emission to the end of a compilation unit. This way it can
319 determine if those functions (statics) are needed or not, and
320 can do some garbage collection (I think). This makes line
321 numbers and corresponding addresses unordered, and we end up
322 with a line table like:
339 and that breaks gdb's binary search on line numbers, if the
340 above table is not sorted on line numbers. And that sort
341 should be on function based, since gcc can emit line numbers
344 10 0x100 - for the init/test part of a for stmt.
347 10 0x400 - for the increment part of a for stmt.
349 arrange_linetable() will do this sorting.
351 2) aix symbol table might look like:
353 c_file // beginning of a new file
354 .bi // beginning of include file
355 .ei // end of include file
359 basically, .bi/.ei pairs do not necessarily encapsulate
360 their scope. They need to be recorded, and processed later
361 on when we come the end of the compilation unit.
362 Include table (inclTable) and process_linenos() handle
368 /* compare line table entry addresses. */
371 compare_lte (const void *lte1p, const void *lte2p)
373 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
374 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
375 return lte1->pc - lte2->pc;
378 /* Given a line table with function entries are marked, arrange its functions
379 in ascending order and strip off function entry markers and return it in
380 a newly created table. If the old one is good enough, return the old one. */
381 /* FIXME: I think all this stuff can be replaced by just passing
382 sort_linevec = 1 to end_symtab. */
384 static struct linetable *
385 arrange_linetable (struct linetable *oldLineTb)
387 int ii, jj, newline, /* new line count */
388 function_count; /* # of functions */
390 struct linetable_entry *fentry; /* function entry vector */
391 int fentry_size; /* # of function entries */
392 struct linetable *newLineTb; /* new line table */
394 #define NUM_OF_FUNCTIONS 20
396 fentry_size = NUM_OF_FUNCTIONS;
397 fentry = (struct linetable_entry *)
398 xmalloc (fentry_size * sizeof (struct linetable_entry));
400 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
403 if (oldLineTb->item[ii].line == 0)
404 { /* function entry found. */
406 if (function_count >= fentry_size)
407 { /* make sure you have room. */
409 fentry = (struct linetable_entry *)
410 xrealloc (fentry, fentry_size * sizeof (struct linetable_entry));
412 fentry[function_count].line = ii;
413 fentry[function_count].pc = oldLineTb->item[ii].pc;
418 if (function_count == 0)
423 else if (function_count > 1)
424 qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte);
426 /* allocate a new line table. */
427 newLineTb = (struct linetable *)
429 (sizeof (struct linetable) +
430 (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
432 /* if line table does not start with a function beginning, copy up until
436 if (oldLineTb->item[0].line != 0)
438 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
439 newLineTb->item[newline] = oldLineTb->item[newline];
441 /* Now copy function lines one by one. */
443 for (ii = 0; ii < function_count; ++ii)
445 for (jj = fentry[ii].line + 1;
446 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
448 newLineTb->item[newline] = oldLineTb->item[jj];
451 newLineTb->nitems = oldLineTb->nitems - function_count;
455 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
456 following `IncludeChain'. At the end of each symtab (end_symtab),
457 we will determine if we should create additional symtab's to
458 represent if (the include files. */
461 typedef struct _inclTable
463 char *name; /* include filename */
465 /* Offsets to the line table. end points to the last entry which is
466 part of this include file. */
469 struct subfile *subfile;
470 unsigned funStartLine; /* start line # of its function */
474 #define INITIAL_INCLUDE_TABLE_LENGTH 20
475 static InclTable *inclTable; /* global include table */
476 static int inclIndx; /* last entry to table */
477 static int inclLength; /* table length */
478 static int inclDepth; /* nested include depth */
480 static void allocate_include_entry (void);
483 record_include_begin (struct coff_symbol *cs)
487 /* In xcoff, we assume include files cannot be nested (not in .c files
488 of course, but in corresponding .s files.). */
490 /* This can happen with old versions of GCC.
491 GCC 2.3.3-930426 does not exhibit this on a test case which
492 a user said produced the message for him. */
493 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
497 allocate_include_entry ();
499 inclTable[inclIndx].name = cs->c_name;
500 inclTable[inclIndx].begin = cs->c_value;
504 record_include_end (struct coff_symbol *cs)
510 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
513 allocate_include_entry ();
515 pTbl = &inclTable[inclIndx];
516 pTbl->end = cs->c_value;
523 allocate_include_entry (void)
525 if (inclTable == NULL)
527 inclTable = (InclTable *)
528 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
530 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
531 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
534 else if (inclIndx >= inclLength)
536 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
537 inclTable = (InclTable *)
538 xrealloc (inclTable, sizeof (InclTable) * inclLength);
539 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
540 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
544 /* Global variable to pass the psymtab down to all the routines involved
545 in psymtab to symtab processing. */
546 static struct partial_symtab *this_symtab_psymtab;
548 /* given the start and end addresses of a compilation unit (or a csect,
549 at times) process its lines and create appropriate line vectors. */
552 process_linenos (CORE_ADDR start, CORE_ADDR end)
555 file_ptr max_offset =
556 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)
559 /* subfile structure for the main compilation unit. */
560 struct subfile main_subfile;
562 /* In the main source file, any time we see a function entry, we
563 reset this variable to function's absolute starting line number.
564 All the following line numbers in the function are relative to
565 this, and we record absolute line numbers in record_line(). */
567 unsigned int main_source_baseline = 0;
572 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
574 goto return_after_cleanup;
576 memset (&main_subfile, '\0', sizeof (main_subfile));
579 /* All source lines were in the main source file. None in include files. */
581 enter_line_range (&main_subfile, offset, 0, start, end,
582 &main_source_baseline);
586 /* There was source with line numbers in include files. */
589 coff_data (this_symtab_psymtab->objfile->obfd)->local_linesz;
590 main_source_baseline = 0;
592 for (ii = 0; ii < inclIndx; ++ii)
594 struct subfile *tmpSubfile;
596 /* If there is main file source before include file, enter it. */
597 if (offset < inclTable[ii].begin)
600 (&main_subfile, offset, inclTable[ii].begin - linesz,
601 start, 0, &main_source_baseline);
604 /* Have a new subfile for the include file. */
606 tmpSubfile = inclTable[ii].subfile =
607 (struct subfile *) xmalloc (sizeof (struct subfile));
609 memset (tmpSubfile, '\0', sizeof (struct subfile));
610 firstLine = &(inclTable[ii].funStartLine);
612 /* Enter include file's lines now. */
613 enter_line_range (tmpSubfile, inclTable[ii].begin,
614 inclTable[ii].end, start, 0, firstLine);
616 if (offset <= inclTable[ii].end)
617 offset = inclTable[ii].end + linesz;
620 /* All the include files' line have been processed at this point. Now,
621 enter remaining lines of the main file, if any left. */
622 if (offset < max_offset + 1 - linesz)
624 enter_line_range (&main_subfile, offset, 0, start, end,
625 &main_source_baseline);
629 /* Process main file's line numbers. */
630 if (main_subfile.line_vector)
632 struct linetable *lineTb, *lv;
634 lv = main_subfile.line_vector;
636 /* Line numbers are not necessarily ordered. xlc compilation will
637 put static function to the end. */
639 lineTb = arrange_linetable (lv);
642 current_subfile->line_vector = (struct linetable *)
643 xrealloc (lv, (sizeof (struct linetable)
644 + lv->nitems * sizeof (struct linetable_entry)));
649 current_subfile->line_vector = lineTb;
652 current_subfile->line_vector_length =
653 current_subfile->line_vector->nitems;
656 /* Now, process included files' line numbers. */
658 for (ii = 0; ii < inclIndx; ++ii)
660 if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */
662 struct linetable *lineTb, *lv;
664 lv = (inclTable[ii].subfile)->line_vector;
666 /* Line numbers are not necessarily ordered. xlc compilation will
667 put static function to the end. */
669 lineTb = arrange_linetable (lv);
673 /* For the same include file, we might want to have more than one
674 subfile. This happens if we have something like:
682 while foo.h including code in it. (stupid but possible)
683 Since start_subfile() looks at the name and uses an
684 existing one if finds, we need to provide a fake name and
688 start_subfile (inclTable[ii].name, (char *) 0);
691 /* Pick a fake name that will produce the same results as this
692 one when passed to deduce_language_from_filename. Kludge on
694 char *fakename = strrchr (inclTable[ii].name, '.');
695 if (fakename == NULL)
697 start_subfile (fakename, (char *) 0);
698 xfree (current_subfile->name);
700 current_subfile->name = xstrdup (inclTable[ii].name);
705 current_subfile->line_vector =
706 (struct linetable *) xrealloc
707 (lv, (sizeof (struct linetable)
708 + lv->nitems * sizeof (struct linetable_entry)));
714 current_subfile->line_vector = lineTb;
717 current_subfile->line_vector_length =
718 current_subfile->line_vector->nitems;
719 start_subfile (pop_subfile (), (char *) 0);
723 return_after_cleanup:
725 /* We don't want to keep alloc/free'ing the global include file table. */
728 /* Start with a fresh subfile structure for the next file. */
729 memset (&main_subfile, '\0', sizeof (struct subfile));
733 aix_process_linenos (void)
735 /* process line numbers and enter them into line vector */
736 process_linenos (last_source_start_addr, cur_src_end_addr);
740 /* Enter a given range of lines into the line vector.
741 can be called in the following two ways:
742 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
743 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
745 endoffset points to the last line table entry that we should pay
749 enter_line_range (struct subfile *subfile, unsigned beginoffset, unsigned endoffset, /* offsets to line table */
750 CORE_ADDR startaddr, /* offsets to line table */
751 CORE_ADDR endaddr, unsigned *firstLine)
753 unsigned int curoffset;
756 struct internal_lineno int_lnno;
757 unsigned int limit_offset;
761 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
763 curoffset = beginoffset;
765 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)
770 if (endoffset >= limit_offset)
772 complaint (&symfile_complaints,
773 _("Bad line table offset in C_EINCL directive"));
776 limit_offset = endoffset;
781 abfd = this_symtab_psymtab->objfile->obfd;
782 linesz = coff_data (abfd)->local_linesz;
783 ext_lnno = alloca (linesz);
785 while (curoffset <= limit_offset)
787 bfd_seek (abfd, curoffset, SEEK_SET);
788 bfd_bread (ext_lnno, linesz, abfd);
789 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
791 /* Find the address this line represents. */
792 addr = (int_lnno.l_lnno
793 ? int_lnno.l_addr.l_paddr
794 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
795 addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets,
796 SECT_OFF_TEXT (this_symtab_psymtab->objfile));
798 if (addr < startaddr || (endaddr && addr >= endaddr))
801 if (int_lnno.l_lnno == 0)
803 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
804 record_line (subfile, 0, addr);
808 record_line (subfile, *firstLine + int_lnno.l_lnno, addr);
814 /* Save the vital information for use when closing off the current file.
815 NAME is the file name the symbols came from, START_ADDR is the first
816 text address for the file, and SIZE is the number of bytes of text. */
818 #define complete_symtab(name, start_addr) { \
819 last_source_file = savestring (name, strlen (name)); \
820 last_source_start_addr = start_addr; \
824 /* Refill the symbol table input buffer
825 and set the variables that control fetching entries from it.
826 Reports an error if no data available.
827 This function can read past the end of the symbol table
828 (into the string table) but this does no harm. */
830 /* Reading symbol table has to be fast! Keep the followings as macros, rather
833 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
837 if (namestr[0] == '.') ++namestr; \
838 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
839 (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
840 misc_func_recorded = 1; \
844 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
845 nested. At any given time, a symbol can only be in one static block.
846 This is the base address of current static block, zero if non exists. */
848 static int static_block_base = 0;
850 /* Section number for the current static block. */
852 static int static_block_section = -1;
854 /* true if space for symbol name has been allocated. */
856 static int symname_alloced = 0;
858 /* Next symbol to read. Pointer into raw seething symbol table. */
860 static char *raw_symbol;
862 /* This is the function which stabsread.c calls to get symbol
866 xcoff_next_symbol_text (struct objfile *objfile)
868 struct internal_syment symbol;
870 /* FIXME: is this the same as the passed arg? */
871 objfile = this_symtab_psymtab->objfile;
873 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
876 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
878 /* Return something which points to '\0' and hope the symbol reading
879 code does something reasonable. */
882 else if (symbol.n_sclass & 0x80)
885 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec
888 coff_data (objfile->obfd)->local_symesz;
893 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
895 /* Return something which points to '\0' and hope the symbol reading
896 code does something reasonable. */
902 /* Read symbols for a given partial symbol table. */
905 read_xcoff_symtab (struct partial_symtab *pst)
907 struct objfile *objfile = pst->objfile;
908 bfd *abfd = objfile->obfd;
909 char *raw_auxptr; /* Pointer to first raw aux entry for sym */
910 char *strtbl = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl;
912 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec;
913 char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
915 struct internal_syment symbol[1];
916 union internal_auxent main_aux;
917 struct coff_symbol cs[1];
918 CORE_ADDR file_start_addr = 0;
919 CORE_ADDR file_end_addr = 0;
921 int next_file_symnum = -1;
922 unsigned int max_symnum;
923 int just_started = 1;
925 int fcn_start_addr = 0;
927 struct coff_symbol fcn_stab_saved;
929 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
930 union internal_auxent fcn_aux_saved;
931 struct context_stack *new;
933 char *filestring = " _start_ "; /* Name of the current file. */
935 char *last_csect_name; /* last seen csect's name and value */
936 CORE_ADDR last_csect_val;
939 this_symtab_psymtab = pst;
941 /* Get the appropriate COFF "constants" related to the file we're
943 local_symesz = coff_data (abfd)->local_symesz;
945 last_source_file = NULL;
950 start_symtab (filestring, (char *) NULL, file_start_addr);
951 record_debugformat (debugfmt);
952 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
954 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
955 first_object_file_end = 0;
958 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl
959 + symnum * local_symesz;
961 while (symnum < max_symnum)
964 QUIT; /* make this command interruptable. */
966 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
967 /* read one symbol into `cs' structure. After processing the
968 whole symbol table, only string table will be kept in memory,
969 symbol table and debug section of xcoff will be freed. Thus
970 we can mark symbols with names in string table as
975 /* Swap and align the symbol into a reasonable C structure. */
976 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
978 cs->c_symnum = symnum;
979 cs->c_naux = symbol->n_numaux;
980 if (symbol->n_zeroes)
983 /* We must use the original, unswapped, name here so the name field
984 pointed to by cs->c_name will persist throughout xcoffread. If
985 we use the new field, it gets overwritten for each symbol. */
986 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
987 /* If it's exactly E_SYMNMLEN characters long it isn't
989 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
992 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
993 strncpy (p, cs->c_name, E_SYMNMLEN);
994 p[E_SYMNMLEN] = '\0';
999 else if (symbol->n_sclass & 0x80)
1001 cs->c_name = debugsec + symbol->n_offset;
1002 symname_alloced = 0;
1006 /* in string table */
1007 cs->c_name = strtbl + (int) symbol->n_offset;
1008 symname_alloced = 1;
1010 cs->c_value = symbol->n_value;
1011 cs->c_sclass = symbol->n_sclass;
1012 cs->c_secnum = symbol->n_scnum;
1013 cs->c_type = (unsigned) symbol->n_type;
1015 raw_symbol += local_symesz;
1018 /* Save addr of first aux entry. */
1019 raw_auxptr = raw_symbol;
1021 /* Skip all the auxents associated with this symbol. */
1022 for (ii = symbol->n_numaux; ii; --ii)
1024 raw_symbol += coff_data (abfd)->local_auxesz;
1029 /* if symbol name starts with ".$" or "$", ignore it. */
1030 if (cs->c_name[0] == '$'
1031 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1034 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1036 if (last_source_file)
1039 end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT (objfile));
1044 start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0);
1045 record_debugformat (debugfmt);
1046 cur_src_end_addr = first_object_file_end;
1047 /* done with all files, everything from here on is globals */
1050 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1053 /* Dealing with a symbol with a csect entry. */
1055 #define CSECT(PP) ((PP)->x_csect)
1056 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1057 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1058 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1059 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1061 /* Convert the auxent to something we can access. */
1062 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1063 0, cs->c_naux, &main_aux);
1065 switch (CSECT_SMTYP (&main_aux))
1069 /* Ignore all external references. */
1073 /* A section description. */
1075 switch (CSECT_SCLAS (&main_aux))
1081 /* A program csect is seen. We have to allocate one
1082 symbol table for each program csect. Normally gdb
1083 prefers one symtab for each source file. In case
1084 of AIX, one source file might include more than one
1085 [PR] csect, and they don't have to be adjacent in
1086 terms of the space they occupy in memory. Thus, one
1087 single source file might get fragmented in the
1088 memory and gdb's file start and end address
1089 approach does not work! GCC (and I think xlc) seem
1090 to put all the code in the unnamed program csect. */
1092 if (last_csect_name)
1094 complete_symtab (filestring, file_start_addr);
1095 cur_src_end_addr = file_end_addr;
1096 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1099 /* Give all csects for this source file the same
1101 start_symtab (filestring, NULL, (CORE_ADDR) 0);
1102 record_debugformat (debugfmt);
1105 /* If this is the very first csect seen,
1106 basically `__start'. */
1109 first_object_file_end
1110 = cs->c_value + CSECT_LEN (&main_aux);
1115 cs->c_value + ANOFFSET (objfile->section_offsets,
1116 SECT_OFF_TEXT (objfile));
1117 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1119 if (cs->c_name && (cs->c_name[0] == '.'
1120 || cs->c_name[0] == '@'))
1122 last_csect_name = cs->c_name;
1123 last_csect_val = cs->c_value;
1124 last_csect_sec = secnum_to_section (cs->c_secnum, objfile);
1129 /* All other symbols are put into the minimal symbol
1142 /* Ignore the symbol. */
1150 switch (CSECT_SCLAS (&main_aux))
1153 /* a function entry point. */
1154 function_entry_point:
1156 fcn_start_addr = cs->c_value;
1158 /* save the function header info, which will be used
1159 when `.bf' is seen. */
1161 fcn_aux_saved = main_aux;
1165 /* shared library function trampoline code entry point. */
1169 /* The symbols often have the same names as debug symbols for
1170 functions, and confuse lookup_symbol. */
1174 /* xlc puts each variable in a separate csect, so we get
1175 an XTY_SD for each variable. But gcc puts several
1176 variables in a csect, so that each variable only gets
1177 an XTY_LD. This will typically be XMC_RW; I suspect
1178 XMC_RO and XMC_BS might be possible too.
1179 These variables are put in the minimal symbol table
1186 /* Common symbols are put into the minimal symbol table only. */
1194 /* If explicitly specified as a function, treat is as one. This check
1195 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1196 after the above CSECT check. */
1197 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1199 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1200 0, cs->c_naux, &main_aux);
1201 goto function_entry_point;
1204 switch (cs->c_sclass)
1209 /* c_value field contains symnum of next .file entry in table
1210 or symnum of first global after last .file. */
1212 next_file_symnum = cs->c_value;
1214 /* Complete symbol table for last object file containing
1215 debugging information. */
1217 /* Whether or not there was a csect in the previous file, we
1218 have to call `end_stabs' and `start_stabs' to reset
1219 type_vector, line_vector, etc. structures. */
1221 complete_symtab (filestring, file_start_addr);
1222 cur_src_end_addr = file_end_addr;
1223 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1226 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1227 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1228 standard COFF way and put it in the auxent. We use the auxent if
1229 the symbol is ".file" and an auxent exists, otherwise use the symbol
1230 itself. Simple enough. */
1231 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1233 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1234 0, cs->c_naux, &main_aux);
1235 filestring = coff_getfilename (&main_aux, objfile);
1238 filestring = cs->c_name;
1241 start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0);
1242 record_debugformat (debugfmt);
1243 last_csect_name = 0;
1245 /* reset file start and end addresses. A compilation unit with no text
1246 (only data) should have zero file boundaries. */
1247 file_start_addr = file_end_addr = 0;
1251 fcn_stab_saved = *cs;
1255 if (DEPRECATED_STREQ (cs->c_name, ".bf"))
1257 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1258 SECT_OFF_TEXT (objfile));
1259 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1260 0, cs->c_naux, &main_aux);
1262 within_function = 1;
1264 new = push_context (0, fcn_start_addr + off);
1266 new->name = define_symbol
1267 (fcn_cs_saved.c_value + off,
1268 fcn_stab_saved.c_name, 0, 0, objfile);
1269 if (new->name != NULL)
1270 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1272 else if (DEPRECATED_STREQ (cs->c_name, ".ef"))
1275 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1276 0, cs->c_naux, &main_aux);
1278 /* The value of .ef is the address of epilogue code;
1279 not useful for gdb. */
1280 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1281 contains number of lines to '}' */
1283 if (context_stack_depth <= 0)
1284 { /* We attempted to pop an empty context stack */
1285 ef_complaint (cs->c_symnum);
1286 within_function = 0;
1289 new = pop_context ();
1290 /* Stack must be empty now. */
1291 if (context_stack_depth > 0 || new == NULL)
1293 ef_complaint (cs->c_symnum);
1294 within_function = 0;
1298 finish_block (new->name, &local_symbols, new->old_blocks,
1300 (fcn_cs_saved.c_value
1301 + fcn_aux_saved.x_sym.x_misc.x_fsize
1302 + ANOFFSET (objfile->section_offsets,
1303 SECT_OFF_TEXT (objfile))),
1305 within_function = 0;
1310 /* Begin static block. */
1312 struct internal_syment symbol;
1314 read_symbol (&symbol, cs->c_value);
1315 static_block_base = symbol.n_value;
1316 static_block_section =
1317 secnum_to_section (symbol.n_scnum, objfile);
1322 /* End of static block. */
1323 static_block_base = 0;
1324 static_block_section = -1;
1335 complaint (&symfile_complaints, _("Unrecognized storage class %d."),
1350 /* beginning of include file */
1351 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1352 order. Thus, when wee see them, we might not know enough info
1353 to process them. Thus, we'll be saving them into a table
1354 (inclTable) and postpone their processing. */
1356 record_include_begin (cs);
1360 /* End of include file. */
1361 /* See the comment after case C_BINCL. */
1362 record_include_end (cs);
1366 if (DEPRECATED_STREQ (cs->c_name, ".bb"))
1369 new = push_context (depth,
1371 + ANOFFSET (objfile->section_offsets,
1372 SECT_OFF_TEXT (objfile))));
1374 else if (DEPRECATED_STREQ (cs->c_name, ".eb"))
1376 if (context_stack_depth <= 0)
1377 { /* We attempted to pop an empty context stack */
1378 eb_complaint (cs->c_symnum);
1381 new = pop_context ();
1382 if (depth-- != new->depth)
1384 eb_complaint (cs->c_symnum);
1387 if (local_symbols && context_stack_depth > 0)
1389 /* Make a block for the local symbols within. */
1390 finish_block (new->name, &local_symbols, new->old_blocks,
1393 + ANOFFSET (objfile->section_offsets,
1394 SECT_OFF_TEXT (objfile))),
1397 local_symbols = new->locals;
1402 process_xcoff_symbol (cs, objfile);
1407 if (last_source_file)
1411 complete_symtab (filestring, file_start_addr);
1412 cur_src_end_addr = file_end_addr;
1413 s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1414 /* When reading symbols for the last C_FILE of the objfile, try
1415 to make sure that we set pst->symtab to the symtab for the
1416 file, not to the _globals_ symtab. I'm not sure whether this
1417 actually works right or when/if it comes up. */
1418 if (pst->symtab == NULL)
1424 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1425 (SYMBOL2) = (struct symbol *) \
1426 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1427 *(SYMBOL2) = *(SYMBOL1);
1430 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1431 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack);
1434 static struct type *func_symbol_type;
1435 static struct type *var_symbol_type;
1437 /* process one xcoff symbol. */
1439 static struct symbol *
1440 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1442 struct symbol onesymbol;
1443 struct symbol *sym = &onesymbol;
1444 struct symbol *sym2 = NULL;
1450 if (cs->c_secnum < 0)
1452 /* The value is a register number, offset within a frame, etc.,
1453 and does not get relocated. */
1459 sec = secnum_to_section (cs->c_secnum, objfile);
1460 off = ANOFFSET (objfile->section_offsets, sec);
1467 memset (sym, '\0', sizeof (struct symbol));
1469 /* default assumptions */
1470 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1471 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1472 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1474 if (ISFCN (cs->c_type))
1476 /* At this point, we don't know the type of the function. This
1477 will be patched with the type from its stab entry later on in
1478 patch_block_stabs (), unless the file was compiled without -g. */
1480 DEPRECATED_SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
1481 SYMBOL_TYPE (sym) = func_symbol_type;
1483 SYMBOL_CLASS (sym) = LOC_BLOCK;
1484 SYMBOL_DUP (sym, sym2);
1486 if (cs->c_sclass == C_EXT)
1487 add_symbol_to_list (sym2, &global_symbols);
1488 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1489 add_symbol_to_list (sym2, &file_symbols);
1493 /* In case we can't figure out the type, provide default. */
1494 SYMBOL_TYPE (sym) = var_symbol_type;
1496 switch (cs->c_sclass)
1499 /* The values of functions and global symbols are now resolved
1500 via the global_sym_chain in stabsread.c. */
1502 if (fcn_cs_saved.c_sclass == C_EXT)
1503 add_stab_to_list (name, &global_stabs);
1505 add_stab_to_list (name, &file_stabs);
1509 add_stab_to_list (name, &global_stabs);
1514 common_block_start (cs->c_name, objfile);
1518 common_block_end (objfile);
1522 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1535 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1538 SYMBOL_SECTION (sym) = sec;
1545 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1546 all statics and we need to distinguish file-scope versus
1547 function-scope using within_function. We do this by
1548 changing the string we pass to define_symbol to use 'S'
1549 where we need to, which is not necessarily super-clean,
1550 but seems workable enough. */
1552 if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
1556 if (*pp == 'V' && !within_function)
1558 sym = define_symbol ((cs->c_value
1559 + ANOFFSET (objfile->section_offsets,
1560 static_block_section)),
1561 cs->c_name, 0, 0, objfile);
1564 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1565 SYMBOL_SECTION (sym) = static_block_section;
1574 /* Extract the file name from the aux entry of a C_FILE symbol.
1575 Result is in static storage and is only good for temporary use. */
1578 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1580 static char buffer[BUFSIZ];
1582 if (aux_entry->x_file.x_n.x_zeroes == 0)
1584 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl
1585 + aux_entry->x_file.x_n.x_offset);
1588 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1589 buffer[FILNMLEN] = '\0';
1594 /* Set *SYMBOL to symbol number symno in symtbl. */
1596 read_symbol (struct internal_syment *symbol, int symno)
1599 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)->symtbl_num_syms;
1601 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)->symtbl;
1602 if (symno < 0 || symno >= nsyms)
1604 complaint (&symfile_complaints, _("Invalid symbol offset"));
1605 symbol->n_value = 0;
1606 symbol->n_scnum = -1;
1609 bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd,
1610 stbl + (symno * local_symesz),
1614 /* Get value corresponding to symbol number symno in symtbl. */
1617 read_symbol_nvalue (int symno)
1619 struct internal_syment symbol[1];
1621 read_symbol (symbol, symno);
1622 return symbol->n_value;
1626 /* Find the address of the function corresponding to symno, where
1627 symno is the symbol pointed to by the linetable. */
1630 read_symbol_lineno (int symno)
1632 struct objfile *objfile = this_symtab_psymtab->objfile;
1633 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1635 struct coff_symfile_info *info =
1636 (struct coff_symfile_info *)objfile->deprecated_sym_private;
1637 int nsyms = info->symtbl_num_syms;
1638 char *stbl = info->symtbl;
1639 char *strtbl = info->strtbl;
1641 struct internal_syment symbol[1];
1642 union internal_auxent main_aux[1];
1646 bf_notfound_complaint ();
1650 /* Note that just searching for a short distance (e.g. 50 symbols)
1651 is not enough, at least in the following case.
1654 [many .stabx entries]
1655 [a few functions, referring to foo]
1659 What happens here is that the assembler moves the .stabx entries
1660 to right before the ".bf" for foo, but the symbol for "foo" is before
1661 all the stabx entries. See PR gdb/2222. */
1663 /* Maintaining a table of .bf entries might be preferable to this search.
1664 If I understand things correctly it would need to be done only for
1665 the duration of a single psymtab to symtab conversion. */
1666 while (symno < nsyms)
1668 bfd_coff_swap_sym_in (symfile_bfd,
1669 stbl + (symno * local_symesz), symbol);
1670 if (symbol->n_sclass == C_FCN)
1672 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1673 if (DEPRECATED_STREQ (name, ".bf"))
1676 symno += symbol->n_numaux + 1;
1679 bf_notfound_complaint ();
1683 /* take aux entry and return its lineno */
1685 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1686 symbol->n_type, symbol->n_sclass,
1687 0, symbol->n_numaux, main_aux);
1689 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1692 /* Support for line number handling */
1694 /* This function is called for every section; it finds the outer limits
1695 * of the line table (minimum and maximum file offset) so that the
1696 * mainline code can read the whole thing for efficiency.
1699 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1701 struct coff_symfile_info *info;
1703 file_ptr offset, maxoff;
1705 count = asect->lineno_count;
1707 if (!DEPRECATED_STREQ (asect->name, ".text") || count == 0)
1710 size = count * coff_data (abfd)->local_linesz;
1711 info = (struct coff_symfile_info *) vpinfo;
1712 offset = asect->line_filepos;
1713 maxoff = offset + size;
1715 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1716 info->min_lineno_offset = offset;
1718 if (maxoff > info->max_lineno_offset)
1719 info->max_lineno_offset = maxoff;
1722 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab *);
1725 xcoff_psymtab_to_symtab_1 (struct partial_symtab *pst)
1727 struct cleanup *old_chain;
1736 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1741 /* Read in all partial symtabs on which this one is dependent */
1742 for (i = 0; i < pst->number_of_dependencies; i++)
1743 if (!pst->dependencies[i]->readin)
1745 /* Inform about additional files that need to be read in. */
1748 fputs_filtered (" ", gdb_stdout);
1750 fputs_filtered ("and ", gdb_stdout);
1752 printf_filtered ("%s...", pst->dependencies[i]->filename);
1753 wrap_here (""); /* Flush output */
1754 gdb_flush (gdb_stdout);
1756 xcoff_psymtab_to_symtab_1 (pst->dependencies[i]);
1759 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1761 /* Init stuff necessary for reading in symbols. */
1764 old_chain = make_cleanup (really_free_pendings, 0);
1766 read_xcoff_symtab (pst);
1768 do_cleanups (old_chain);
1774 static void xcoff_psymtab_to_symtab (struct partial_symtab *);
1776 /* Read in all of the symbols for a given psymtab for real.
1777 Be verbose about it if the user wants that. */
1780 xcoff_psymtab_to_symtab (struct partial_symtab *pst)
1790 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1795 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0
1796 || pst->number_of_dependencies)
1798 /* Print the message now, before reading the string table,
1799 to avoid disconcerting pauses. */
1802 printf_filtered ("Reading in symbols for %s...", pst->filename);
1803 gdb_flush (gdb_stdout);
1806 sym_bfd = pst->objfile->obfd;
1808 next_symbol_text_func = xcoff_next_symbol_text;
1810 xcoff_psymtab_to_symtab_1 (pst);
1812 /* Match with global symbols. This only needs to be done once,
1813 after all of the symtabs and dependencies have been read in. */
1814 scan_file_globals (pst->objfile);
1816 /* Finish up the debug error message. */
1818 printf_filtered ("done.\n");
1823 xcoff_new_init (struct objfile *objfile)
1825 stabsread_new_init ();
1826 buildsym_new_init ();
1829 /* Do initialization in preparation for reading symbols from OBJFILE.
1831 We will only be called if this is an XCOFF or XCOFF-like file.
1832 BFD handles figuring out the format of the file, and code in symfile.c
1833 uses BFD's determination to vector to us. */
1836 xcoff_symfile_init (struct objfile *objfile)
1838 /* Allocate struct to keep track of the symfile */
1839 objfile->deprecated_sym_private = xmalloc (sizeof (struct coff_symfile_info));
1841 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1842 find this causes a significant slowdown in gdb then we could
1843 set it in the debug symbol readers only when necessary. */
1844 objfile->flags |= OBJF_REORDERED;
1846 init_entry_point_info (objfile);
1849 /* Perform any local cleanups required when we are done with a particular
1850 objfile. I.E, we are in the process of discarding all symbol information
1851 for an objfile, freeing up all memory held for it, and unlinking the
1852 objfile struct from the global list of known objfiles. */
1855 xcoff_symfile_finish (struct objfile *objfile)
1857 if (objfile->deprecated_sym_private != NULL)
1859 xfree (objfile->deprecated_sym_private);
1862 /* Start with a fresh include table for the next objfile. */
1868 inclIndx = inclLength = inclDepth = 0;
1873 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1877 unsigned char lengthbuf[4];
1880 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl = NULL;
1882 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1883 error (_("cannot seek to string table in %s: %s"),
1884 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1886 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1887 length = bfd_h_get_32 (abfd, lengthbuf);
1889 /* If no string table is needed, then the file may end immediately
1890 after the symbols. Just return with `strtbl' set to NULL. */
1892 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1895 /* Allocate string table from objfile_obstack. We will need this table
1896 as long as we have its symbol table around. */
1898 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1899 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl = strtbl;
1901 /* Copy length buffer, the first byte is usually zero and is
1902 used for stabs with a name length of zero. */
1903 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1904 if (length == sizeof lengthbuf)
1907 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1909 if (val != length - sizeof lengthbuf)
1910 error (_("cannot read string table from %s: %s"),
1911 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1912 if (strtbl[length - 1] != '\0')
1913 error (_("bad symbol file: string table does not end with null character"));
1918 /* If we have not yet seen a function for this psymtab, this is 0. If we
1919 have seen one, it is the offset in the line numbers of the line numbers
1921 static unsigned int first_fun_line_offset;
1923 static struct partial_symtab *xcoff_start_psymtab
1924 (struct objfile *, char *, int,
1925 struct partial_symbol **, struct partial_symbol **);
1927 /* Allocate and partially fill a partial symtab. It will be
1928 completely filled at the end of the symbol list.
1930 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1931 is the address relative to which its symbols are (incremental) or 0
1934 static struct partial_symtab *
1935 xcoff_start_psymtab (struct objfile *objfile, char *filename, int first_symnum,
1936 struct partial_symbol **global_syms,
1937 struct partial_symbol **static_syms)
1939 struct partial_symtab *result =
1940 start_psymtab_common (objfile, objfile->section_offsets,
1942 /* We fill in textlow later. */
1944 global_syms, static_syms);
1946 result->read_symtab_private = (char *)
1947 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
1948 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
1949 result->read_symtab = xcoff_psymtab_to_symtab;
1951 /* Deduce the source language from the filename for this psymtab. */
1952 psymtab_language = deduce_language_from_filename (filename);
1957 static struct partial_symtab *xcoff_end_psymtab
1958 (struct partial_symtab *, char **, int, int,
1959 struct partial_symtab **, int, int);
1961 /* Close off the current usage of PST.
1962 Returns PST, or NULL if the partial symtab was empty and thrown away.
1964 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1966 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1967 are the information for includes and dependencies. */
1969 static struct partial_symtab *
1970 xcoff_end_psymtab (struct partial_symtab *pst, char **include_list,
1971 int num_includes, int capping_symbol_number,
1972 struct partial_symtab **dependency_list,
1973 int number_dependencies, int textlow_not_set)
1976 struct objfile *objfile = pst->objfile;
1978 if (capping_symbol_number != -1)
1979 ((struct symloc *) pst->read_symtab_private)->numsyms =
1980 capping_symbol_number
1981 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
1982 ((struct symloc *) pst->read_symtab_private)->lineno_off =
1983 first_fun_line_offset;
1984 first_fun_line_offset = 0;
1985 pst->n_global_syms =
1986 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1987 pst->n_static_syms =
1988 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1990 pst->number_of_dependencies = number_dependencies;
1991 if (number_dependencies)
1993 pst->dependencies = (struct partial_symtab **)
1994 obstack_alloc (&objfile->objfile_obstack,
1995 number_dependencies * sizeof (struct partial_symtab *));
1996 memcpy (pst->dependencies, dependency_list,
1997 number_dependencies * sizeof (struct partial_symtab *));
2000 pst->dependencies = 0;
2002 for (i = 0; i < num_includes; i++)
2004 struct partial_symtab *subpst =
2005 allocate_psymtab (include_list[i], objfile);
2007 subpst->section_offsets = pst->section_offsets;
2008 subpst->read_symtab_private =
2009 (char *) obstack_alloc (&objfile->objfile_obstack,
2010 sizeof (struct symloc));
2011 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2012 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2013 subpst->textlow = 0;
2014 subpst->texthigh = 0;
2016 /* We could save slight bits of space by only making one of these,
2017 shared by the entire set of include files. FIXME-someday. */
2018 subpst->dependencies = (struct partial_symtab **)
2019 obstack_alloc (&objfile->objfile_obstack,
2020 sizeof (struct partial_symtab *));
2021 subpst->dependencies[0] = pst;
2022 subpst->number_of_dependencies = 1;
2024 subpst->globals_offset =
2025 subpst->n_global_syms =
2026 subpst->statics_offset =
2027 subpst->n_static_syms = 0;
2031 subpst->read_symtab = pst->read_symtab;
2034 sort_pst_symbols (pst);
2036 /* If there is already a psymtab or symtab for a file of this name,
2037 remove it. (If there is a symtab, more drastic things also
2038 happen.) This happens in VxWorks. */
2039 free_named_symtabs (pst->filename);
2041 if (num_includes == 0
2042 && number_dependencies == 0
2043 && pst->n_global_syms == 0
2044 && pst->n_static_syms == 0)
2046 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2047 it is on the obstack, but we can forget to chain it on the list. */
2048 /* Empty psymtabs happen as a result of header files which don't have
2049 any symbols in them. There can be a lot of them. */
2051 discard_psymtab (pst);
2053 /* Indicate that psymtab was thrown away. */
2054 pst = (struct partial_symtab *) NULL;
2059 static void swap_sym (struct internal_syment *,
2060 union internal_auxent *, char **, char **,
2061 unsigned int *, struct objfile *);
2063 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2064 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2065 the symbol and its auxents. */
2068 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2069 char **name, char **raw, unsigned int *symnump,
2070 struct objfile *objfile)
2072 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2073 if (symbol->n_zeroes)
2075 /* If it's exactly E_SYMNMLEN characters long it isn't
2077 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2079 /* FIXME: wastes memory for symbols which we don't end up putting
2080 into the minimal symbols. */
2082 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2083 strncpy (p, symbol->n_name, E_SYMNMLEN);
2084 p[E_SYMNMLEN] = '\0';
2088 /* Point to the unswapped name as that persists as long as the
2090 *name = ((struct external_syment *) *raw)->e.e_name;
2092 else if (symbol->n_sclass & 0x80)
2094 *name = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec
2099 *name = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl
2103 *raw += coff_data (objfile->obfd)->local_symesz;
2104 if (symbol->n_numaux > 0)
2106 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2107 symbol->n_sclass, 0, symbol->n_numaux, aux);
2109 *symnump += symbol->n_numaux;
2110 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2115 function_outside_compilation_unit_complaint (const char *arg1)
2117 complaint (&symfile_complaints,
2118 _("function `%s' appears to be defined outside of all compilation units"),
2123 scan_xcoff_symtab (struct objfile *objfile)
2125 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2126 char *filestring = NULL;
2129 int past_first_source_file = 0;
2134 /* Current partial symtab */
2135 struct partial_symtab *pst;
2137 /* List of current psymtab's include files */
2138 char **psymtab_include_list;
2139 int includes_allocated;
2142 /* Index within current psymtab dependency list */
2143 struct partial_symtab **dependency_list;
2144 int dependencies_used, dependencies_allocated;
2147 struct internal_syment symbol;
2148 union internal_auxent main_aux[5];
2149 unsigned int ssymnum;
2151 char *last_csect_name = NULL; /* last seen csect's name and value */
2152 CORE_ADDR last_csect_val = 0;
2153 int last_csect_sec = 0;
2154 int misc_func_recorded = 0; /* true if any misc. function */
2155 int textlow_not_set = 1;
2157 pst = (struct partial_symtab *) 0;
2159 includes_allocated = 30;
2161 psymtab_include_list = (char **) alloca (includes_allocated *
2164 dependencies_allocated = 30;
2165 dependencies_used = 0;
2167 (struct partial_symtab **) alloca (dependencies_allocated *
2168 sizeof (struct partial_symtab *));
2170 last_source_file = NULL;
2172 abfd = objfile->obfd;
2174 sraw_symbol = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl;
2175 nsyms = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl_num_syms;
2177 while (ssymnum < nsyms)
2183 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2184 sclass = symbol.n_sclass;
2191 /* The CSECT auxent--always the last auxent. */
2192 union internal_auxent csect_aux;
2193 unsigned int symnum_before = ssymnum;
2195 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2197 if (symbol.n_numaux > 1)
2199 bfd_coff_swap_aux_in
2201 sraw_symbol - coff_data (abfd)->local_symesz,
2204 symbol.n_numaux - 1,
2209 csect_aux = main_aux[0];
2211 /* If symbol name starts with ".$" or "$", ignore it. */
2212 if (namestring[0] == '$'
2213 || (namestring[0] == '.' && namestring[1] == '$'))
2216 switch (csect_aux.x_csect.x_smtyp & 0x7)
2219 switch (csect_aux.x_csect.x_smclas)
2222 if (last_csect_name)
2224 /* If no misc. function recorded in the last
2225 seen csect, enter it as a function. This
2226 will take care of functions like strcmp()
2229 if (!misc_func_recorded)
2231 RECORD_MINIMAL_SYMBOL
2232 (last_csect_name, last_csect_val,
2233 mst_text, last_csect_sec,
2239 /* We have to allocate one psymtab for
2240 each program csect, because their text
2241 sections need not be adjacent. */
2243 (pst, psymtab_include_list, includes_used,
2244 symnum_before, dependency_list,
2245 dependencies_used, textlow_not_set);
2247 dependencies_used = 0;
2248 /* Give all psymtabs for this source file the same
2250 pst = xcoff_start_psymtab
2254 objfile->global_psymbols.next,
2255 objfile->static_psymbols.next);
2258 /* Activate the misc_func_recorded mechanism for
2259 compiler- and linker-generated CSECTs like ".strcmp"
2261 if (namestring && (namestring[0] == '.'
2262 || namestring[0] == '@'))
2264 last_csect_name = namestring;
2265 last_csect_val = symbol.n_value;
2267 secnum_to_section (symbol.n_scnum, objfile);
2272 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2273 if (highval > pst->texthigh)
2274 pst->texthigh = highval;
2275 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2276 pst->textlow = symbol.n_value;
2278 misc_func_recorded = 0;
2283 /* Data variables are recorded in the minimal symbol
2284 table, except for section symbols. */
2285 if (*namestring != '.')
2286 prim_record_minimal_symbol_and_info
2287 (namestring, symbol.n_value,
2288 sclass == C_HIDEXT ? mst_file_data : mst_data,
2289 NULL, secnum_to_section (symbol.n_scnum, objfile),
2295 warning (_("More than one XMC_TC0 symbol found."));
2296 toc_offset = symbol.n_value;
2298 /* Make TOC offset relative to start address of section. */
2299 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2301 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2305 /* These symbols tell us where the TOC entry for a
2306 variable is, not the variable itself. */
2315 switch (csect_aux.x_csect.x_smclas)
2318 /* A function entry point. */
2320 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2321 first_fun_line_offset =
2322 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2323 RECORD_MINIMAL_SYMBOL
2324 (namestring, symbol.n_value,
2325 sclass == C_HIDEXT ? mst_file_text : mst_text,
2326 secnum_to_section (symbol.n_scnum, objfile),
2331 /* shared library function trampoline code entry
2334 /* record trampoline code entries as
2335 mst_solib_trampoline symbol. When we lookup mst
2336 symbols, we will choose mst_text over
2337 mst_solib_trampoline. */
2338 RECORD_MINIMAL_SYMBOL
2339 (namestring, symbol.n_value,
2340 mst_solib_trampoline,
2341 secnum_to_section (symbol.n_scnum, objfile),
2346 /* The symbols often have the same names as
2347 debug symbols for functions, and confuse
2353 /* xlc puts each variable in a separate csect,
2354 so we get an XTY_SD for each variable. But
2355 gcc puts several variables in a csect, so
2356 that each variable only gets an XTY_LD. We
2357 still need to record them. This will
2358 typically be XMC_RW; I suspect XMC_RO and
2359 XMC_BS might be possible too. */
2360 if (*namestring != '.')
2361 prim_record_minimal_symbol_and_info
2362 (namestring, symbol.n_value,
2363 sclass == C_HIDEXT ? mst_file_data : mst_data,
2364 NULL, secnum_to_section (symbol.n_scnum, objfile),
2371 switch (csect_aux.x_csect.x_smclas)
2375 /* Common variables are recorded in the minimal symbol
2376 table, except for section symbols. */
2377 if (*namestring != '.')
2378 prim_record_minimal_symbol_and_info
2379 (namestring, symbol.n_value,
2380 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2381 NULL, secnum_to_section (symbol.n_scnum, objfile),
2394 unsigned int symnum_before;
2396 symnum_before = ssymnum;
2397 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2400 /* See if the last csect needs to be recorded. */
2402 if (last_csect_name && !misc_func_recorded)
2405 /* If no misc. function recorded in the last seen csect, enter
2406 it as a function. This will take care of functions like
2407 strcmp() compiled by xlc. */
2409 RECORD_MINIMAL_SYMBOL
2410 (last_csect_name, last_csect_val,
2411 mst_text, last_csect_sec, objfile);
2416 xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
2417 symnum_before, dependency_list,
2418 dependencies_used, textlow_not_set);
2420 dependencies_used = 0;
2422 first_fun_line_offset = 0;
2424 /* XCOFF, according to the AIX 3.2 documentation, puts the
2425 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2426 do things the standard COFF way and put it in the auxent.
2427 We use the auxent if the symbol is ".file" and an auxent
2428 exists, otherwise use the symbol itself. */
2429 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2431 filestring = coff_getfilename (&main_aux[0], objfile);
2434 filestring = namestring;
2436 pst = xcoff_start_psymtab (objfile,
2439 objfile->global_psymbols.next,
2440 objfile->static_psymbols.next);
2441 last_csect_name = NULL;
2447 complaint (&symfile_complaints,
2448 _("Storage class %d not recognized during scan"), sclass);
2452 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2453 to handle only the C_FUN and C_EXT. */
2468 /* C_EINCL means we are switching back to the main file. But there
2469 is no reason to care; the only thing we want to know about
2470 includes is the names of all the included (.h) files. */
2475 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2479 /* I don't think the name of the common block (as opposed to the
2480 variables within it) is something which is user visible
2488 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2489 so C_LSYM would appear to be only for locals. */
2495 /* We probably could save a few instructions by assuming that
2496 C_LSYM, C_PSYM, etc., never have auxents. */
2497 int naux1 = symbol.n_numaux + 1;
2499 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2505 /* Mark down an include file in the current psymtab */
2506 enum language tmp_language;
2507 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2510 tmp_language = deduce_language_from_filename (namestring);
2512 /* Only change the psymtab's language if we've learned
2513 something useful (eg. tmp_language is not language_unknown).
2514 In addition, to match what start_subfile does, never change
2516 if (tmp_language != language_unknown
2517 && (tmp_language != language_c
2518 || psymtab_language != language_cplus))
2519 psymtab_language = tmp_language;
2521 /* In C++, one may expect the same filename to come round many
2522 times, when code is coming alternately from the main file
2523 and from inline functions in other files. So I check to see
2524 if this is a file we've seen before -- either the main
2525 source file, or a previously included file.
2527 This seems to be a lot of time to be spending on N_SOL, but
2528 things like "break c-exp.y:435" need to work (I
2529 suppose the psymtab_include_list could be hashed or put
2530 in a binary tree, if profiling shows this is a major hog). */
2531 if (pst && DEPRECATED_STREQ (namestring, pst->filename))
2535 for (i = 0; i < includes_used; i++)
2536 if (DEPRECATED_STREQ (namestring, psymtab_include_list[i]))
2544 psymtab_include_list[includes_used++] = namestring;
2545 if (includes_used >= includes_allocated)
2547 char **orig = psymtab_include_list;
2549 psymtab_include_list = (char **)
2550 alloca ((includes_allocated *= 2) *
2552 memcpy (psymtab_include_list, orig,
2553 includes_used * sizeof (char *));
2558 /* The value of the C_FUN is not the address of the function (it
2559 appears to be the address before linking), but as long as it
2560 is smaller than the actual address, then find_pc_partial_function
2561 will use the minimal symbols instead. I hope. */
2569 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2572 p = (char *) strchr (namestring, ':');
2574 continue; /* Not a debugging symbol. */
2576 /* Main processing section for debugging symbols which
2577 the initial read through the symbol tables needs to worry
2578 about. If we reach this point, the symbol which we are
2579 considering is definitely one we are interested in.
2580 p must also contain the (valid) index into the namestring
2581 which indicates the debugging type symbol. */
2586 symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
2587 #ifdef STATIC_TRANSFORM_NAME
2588 namestring = STATIC_TRANSFORM_NAME (namestring);
2590 add_psymbol_to_list (namestring, p - namestring,
2591 VAR_DOMAIN, LOC_STATIC,
2592 &objfile->static_psymbols,
2594 psymtab_language, objfile);
2598 symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
2599 /* The addresses in these entries are reported to be
2600 wrong. See the code that reads 'G's for symtabs. */
2601 add_psymbol_to_list (namestring, p - namestring,
2602 VAR_DOMAIN, LOC_STATIC,
2603 &objfile->global_psymbols,
2605 psymtab_language, objfile);
2609 /* When a 'T' entry is defining an anonymous enum, it
2610 may have a name which is the empty string, or a
2611 single space. Since they're not really defining a
2612 symbol, those shouldn't go in the partial symbol
2613 table. We do pick up the elements of such enums at
2614 'check_enum:', below. */
2615 if (p >= namestring + 2
2616 || (p == namestring + 1
2617 && namestring[0] != ' '))
2619 add_psymbol_to_list (namestring, p - namestring,
2620 STRUCT_DOMAIN, LOC_TYPEDEF,
2621 &objfile->static_psymbols,
2623 psymtab_language, objfile);
2626 /* Also a typedef with the same name. */
2627 add_psymbol_to_list (namestring, p - namestring,
2628 VAR_DOMAIN, LOC_TYPEDEF,
2629 &objfile->static_psymbols,
2631 psymtab_language, objfile);
2638 if (p != namestring) /* a name is there, not just :T... */
2640 add_psymbol_to_list (namestring, p - namestring,
2641 VAR_DOMAIN, LOC_TYPEDEF,
2642 &objfile->static_psymbols,
2644 psymtab_language, objfile);
2647 /* If this is an enumerated type, we need to
2648 add all the enum constants to the partial symbol
2649 table. This does not cover enums without names, e.g.
2650 "enum {a, b} c;" in C, but fortunately those are
2651 rare. There is no way for GDB to find those from the
2652 enum type without spending too much time on it. Thus
2653 to solve this problem, the compiler needs to put out the
2654 enum in a nameless type. GCC2 does this. */
2656 /* We are looking for something of the form
2657 <name> ":" ("t" | "T") [<number> "="] "e"
2658 {<constant> ":" <value> ","} ";". */
2660 /* Skip over the colon and the 't' or 'T'. */
2662 /* This type may be given a number. Also, numbers can come
2663 in pairs like (0,26). Skip over it. */
2664 while ((*p >= '0' && *p <= '9')
2665 || *p == '(' || *p == ',' || *p == ')'
2671 /* The aix4 compiler emits extra crud before the members. */
2674 /* Skip over the type (?). */
2678 /* Skip over the colon. */
2682 /* We have found an enumerated type. */
2683 /* According to comments in read_enum_type
2684 a comma could end it instead of a semicolon.
2685 I don't know where that happens.
2687 while (*p && *p != ';' && *p != ',')
2691 /* Check for and handle cretinous dbx symbol name
2693 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2694 p = next_symbol_text (objfile);
2696 /* Point to the character after the name
2697 of the enum constant. */
2698 for (q = p; *q && *q != ':'; q++)
2700 /* Note that the value doesn't matter for
2701 enum constants in psymtabs, just in symtabs. */
2702 add_psymbol_to_list (p, q - p,
2703 VAR_DOMAIN, LOC_CONST,
2704 &objfile->static_psymbols, 0,
2705 0, psymtab_language, objfile);
2706 /* Point past the name. */
2708 /* Skip over the value. */
2709 while (*p && *p != ',')
2711 /* Advance past the comma. */
2719 /* Constant, e.g. from "const" in Pascal. */
2720 add_psymbol_to_list (namestring, p - namestring,
2721 VAR_DOMAIN, LOC_CONST,
2722 &objfile->static_psymbols, symbol.n_value,
2723 0, psymtab_language, objfile);
2729 int name_len = p - namestring;
2730 char *name = xmalloc (name_len + 1);
2731 memcpy (name, namestring, name_len);
2732 name[name_len] = '\0';
2733 function_outside_compilation_unit_complaint (name);
2736 symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2737 add_psymbol_to_list (namestring, p - namestring,
2738 VAR_DOMAIN, LOC_BLOCK,
2739 &objfile->static_psymbols,
2741 psymtab_language, objfile);
2744 /* Global functions were ignored here, but now they
2745 are put into the global psymtab like one would expect.
2746 They're also in the minimal symbol table. */
2750 int name_len = p - namestring;
2751 char *name = xmalloc (name_len + 1);
2752 memcpy (name, namestring, name_len);
2753 name[name_len] = '\0';
2754 function_outside_compilation_unit_complaint (name);
2757 symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2758 add_psymbol_to_list (namestring, p - namestring,
2759 VAR_DOMAIN, LOC_BLOCK,
2760 &objfile->global_psymbols,
2762 psymtab_language, objfile);
2765 /* Two things show up here (hopefully); static symbols of
2766 local scope (static used inside braces) or extensions
2767 of structure symbols. We can ignore both. */
2781 case '#': /* for symbol identification (used in live ranges) */
2785 /* It is a C++ nested symbol. We don't need to record it
2786 (I don't think); if we try to look up foo::bar::baz,
2787 then symbols for the symtab containing foo should get
2788 read in, I think. */
2789 /* Someone says sun cc puts out symbols like
2790 /foo/baz/maclib::/usr/local/bin/maclib,
2791 which would get here with a symbol type of ':'. */
2795 /* Unexpected symbol descriptor. The second and subsequent stabs
2796 of a continued stab can show up here. The question is
2797 whether they ever can mimic a normal stab--it would be
2798 nice if not, since we certainly don't want to spend the
2799 time searching to the end of every string looking for
2802 complaint (&symfile_complaints,
2803 _("unknown symbol descriptor `%c'"), p[1]);
2805 /* Ignore it; perhaps it is an extension that we don't
2815 xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
2816 ssymnum, dependency_list,
2817 dependencies_used, textlow_not_set);
2820 /* Record the toc offset value of this symbol table into objfile structure.
2821 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2822 this information would be file auxiliary header. */
2824 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->toc_offset = toc_offset;
2827 /* Return the toc offset value for a given objfile. */
2830 get_toc_offset (struct objfile *objfile)
2833 return ((struct coff_symfile_info *) objfile->deprecated_sym_private)->toc_offset;
2837 /* Scan and build partial symbols for a symbol file.
2838 We have been initialized by a call to dbx_symfile_init, which
2839 put all the relevant info into a "struct dbx_symfile_info",
2840 hung off the objfile structure.
2842 SECTION_OFFSETS contains offsets relative to which the symbols in the
2843 various sections are (depending where the sections were actually loaded).
2844 MAINLINE is true if we are reading the main symbol
2845 table (as opposed to a shared lib or dynamically loaded file). */
2848 xcoff_initial_scan (struct objfile *objfile, int mainline)
2852 struct cleanup *back_to;
2853 int num_symbols; /* # of symbols */
2854 file_ptr symtab_offset; /* symbol table and */
2855 file_ptr stringtab_offset; /* string table file offsets */
2856 struct coff_symfile_info *info;
2860 info = (struct coff_symfile_info *) objfile->deprecated_sym_private;
2861 symfile_bfd = abfd = objfile->obfd;
2862 name = objfile->name;
2864 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2865 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2866 stringtab_offset = symtab_offset +
2867 num_symbols * coff_data (abfd)->local_symesz;
2869 info->min_lineno_offset = 0;
2870 info->max_lineno_offset = 0;
2871 bfd_map_over_sections (abfd, find_linenos, info);
2873 if (num_symbols > 0)
2875 /* Read the string table. */
2876 init_stringtab (abfd, stringtab_offset, objfile);
2878 /* Read the .debug section, if present. */
2880 struct bfd_section *secp;
2881 bfd_size_type length;
2882 char *debugsec = NULL;
2884 secp = bfd_get_section_by_name (abfd, ".debug");
2887 length = bfd_section_size (abfd, secp);
2891 (char *) obstack_alloc (&objfile->objfile_obstack, length);
2893 if (!bfd_get_section_contents (abfd, secp, debugsec,
2894 (file_ptr) 0, length))
2896 error (_("Error reading .debug section of `%s': %s"),
2897 name, bfd_errmsg (bfd_get_error ()));
2901 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec =
2906 /* Read the symbols. We keep them in core because we will want to
2907 access them randomly in read_symbol*. */
2908 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2910 error (_("Error reading symbols from %s: %s"),
2911 name, bfd_errmsg (bfd_get_error ()));
2912 size = coff_data (abfd)->local_symesz * num_symbols;
2913 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl =
2914 obstack_alloc (&objfile->objfile_obstack, size);
2915 ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl_num_syms =
2918 val = bfd_bread (((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl,
2921 perror_with_name (_("reading symbol table"));
2923 /* If we are reinitializing, or if we have never loaded syms yet, init */
2925 || (objfile->global_psymbols.size == 0
2926 && objfile->static_psymbols.size == 0))
2927 /* I'm not sure how how good num_symbols is; the rule of thumb in
2928 init_psymbol_list was developed for a.out. On the one hand,
2929 num_symbols includes auxents. On the other hand, it doesn't
2931 init_psymbol_list (objfile, num_symbols);
2933 free_pending_blocks ();
2934 back_to = make_cleanup (really_free_pendings, 0);
2936 init_minimal_symbol_collection ();
2937 make_cleanup_discard_minimal_symbols ();
2939 /* Now that the symbol table data of the executable file are all in core,
2940 process them and define symbols accordingly. */
2942 scan_xcoff_symtab (objfile);
2944 /* Install any minimal symbols that have been collected as the current
2945 minimal symbols for this objfile. */
2947 install_minimal_symbols (objfile);
2949 do_cleanups (back_to);
2953 xcoff_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs)
2955 asection *sect = NULL;
2958 objfile->num_sections = bfd_count_sections (objfile->obfd);
2959 objfile->section_offsets = (struct section_offsets *)
2960 obstack_alloc (&objfile->objfile_obstack,
2961 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
2963 /* Initialize the section indexes for future use. */
2964 sect = bfd_get_section_by_name (objfile->obfd, ".text");
2966 objfile->sect_index_text = sect->index;
2968 sect = bfd_get_section_by_name (objfile->obfd, ".data");
2970 objfile->sect_index_data = sect->index;
2972 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
2974 objfile->sect_index_bss = sect->index;
2976 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
2978 objfile->sect_index_rodata = sect->index;
2980 for (i = 0; i < objfile->num_sections; ++i)
2982 /* syms_from_objfile kindly subtracts from addr the
2983 bfd_section_vma of the .text section. This strikes me as
2984 wrong--whether the offset to be applied to symbol reading is
2985 relative to the start address of the section depends on the
2986 symbol format. In any event, this whole "addr" concept is
2987 pretty broken (it doesn't handle any section but .text
2988 sensibly), so just ignore the addr parameter and use 0.
2989 rs6000-nat.c will set the correct section offsets via
2990 objfile_relocate. */
2991 (objfile->section_offsets)->offsets[i] = 0;
2995 /* Register our ability to parse symbols for xcoff BFD files. */
2997 static struct sym_fns xcoff_sym_fns =
3000 /* It is possible that coff and xcoff should be merged as
3001 they do have fundamental similarities (for example, the extra storage
3002 classes used for stabs could presumably be recognized in any COFF file).
3003 However, in addition to obvious things like all the csect hair, there are
3004 some subtler differences between xcoffread.c and coffread.c, notably
3005 the fact that coffread.c has no need to read in all the symbols, but
3006 xcoffread.c reads all the symbols and does in fact randomly access them
3007 (in C_BSTAT and line number processing). */
3009 bfd_target_xcoff_flavour,
3011 xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */
3012 xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3013 xcoff_initial_scan, /* sym_read: read a symbol file into symtab */
3014 xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */
3015 xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */
3016 NULL /* next: pointer to next struct sym_fns */
3020 _initialize_xcoffread (void)
3022 add_symtab_fns (&xcoff_sym_fns);
3024 func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
3025 "<function, no debug info>", NULL);
3026 TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int;
3028 init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
3029 "<variable, no debug info>", NULL);