1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2013 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #include "gdb_string.h"
29 #ifdef HAVE_SYS_FILE_H
34 #include "coff/internal.h"
35 #include "libcoff.h" /* FIXME, internal data from BFD */
36 #include "coff/xcoff.h"
38 #include "coff/rs6000.h"
39 #include "xcoffread.h"
43 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
47 #include "stabsread.h"
48 #include "expression.h"
49 #include "complaints.h"
52 #include "gdb-stabs.h"
54 /* For interface with stabsread.c. */
55 #include "aout/stab_gnu.h"
58 /* Key for XCOFF-associated data. */
60 static const struct objfile_data *xcoff_objfile_data_key;
62 /* We put a pointer to this structure in the read_symtab_private field
68 /* First symbol number for this file. */
72 /* Number of symbols in the section of the symbol table devoted to
73 this file's symbols (actually, the section bracketed may contain
74 more than just this file's symbols). If numsyms is 0, the only
75 reason for this thing's existence is the dependency list. Nothing
76 else will happen when it is read in. */
80 /* Position of the start of the line number information for this
82 unsigned int lineno_off;
85 /* Remember what we deduced to be the source language of this psymtab. */
87 static enum language psymtab_language = language_unknown;
90 /* Simplified internal version of coff symbol table information. */
95 int c_symnum; /* Symbol number of this entry. */
96 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
98 unsigned char c_sclass;
103 /* Last function's saved coff symbol `cs'. */
105 static struct coff_symbol fcn_cs_saved;
107 static bfd *symfile_bfd;
109 /* Core address of start and end of text of current source file.
110 This is calculated from the first function seen after a C_FILE
114 static CORE_ADDR cur_src_end_addr;
116 /* Core address of the end of the first object file. */
118 static CORE_ADDR first_object_file_end;
120 /* Initial symbol-table-debug-string vector length. */
122 #define INITIAL_STABVECTOR_LENGTH 40
124 /* Nonzero if within a function (so symbols should be local,
125 if nothing says specifically). */
129 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
130 there is any reason not to just use a #define, but might as well
131 ask BFD for the size and store it here, I guess. */
133 static unsigned local_symesz;
135 struct coff_symfile_info
137 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
138 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
140 /* Pointer to the string table. */
143 /* Pointer to debug section. */
146 /* Pointer to the a.out symbol table. */
149 /* Number of symbols in symtbl. */
152 /* Offset in data section to TOC anchor. */
153 CORE_ADDR toc_offset;
156 /* Convenience macro to access the per-objfile XCOFF data. */
158 #define XCOFF_DATA(objfile) \
159 ((struct coff_symfile_info *) objfile_data ((objfile), \
160 xcoff_objfile_data_key))
162 /* XCOFF names for dwarf sections. There is no compressed sections. */
164 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
166 { ".dwabrev", NULL },
169 { NULL, NULL }, /* debug_macinfo */
170 { NULL, NULL }, /* debug_macro */
172 { ".dwrnges", NULL },
173 { NULL, NULL }, /* debug_types */
174 { NULL, NULL }, /* debug_addr */
175 { ".dwframe", NULL },
176 { NULL, NULL }, /* eh_frame */
177 { NULL, NULL }, /* gdb_index */
182 bf_notfound_complaint (void)
184 complaint (&symfile_complaints,
185 _("line numbers off, `.bf' symbol not found"));
189 ef_complaint (int arg1)
191 complaint (&symfile_complaints,
192 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
196 eb_complaint (int arg1)
198 complaint (&symfile_complaints,
199 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
202 static void xcoff_initial_scan (struct objfile *, int);
204 static void scan_xcoff_symtab (struct objfile *);
206 static char *xcoff_next_symbol_text (struct objfile *);
208 static void record_include_begin (struct coff_symbol *);
211 enter_line_range (struct subfile *, unsigned, unsigned,
212 CORE_ADDR, CORE_ADDR, unsigned *);
214 static void init_stringtab (bfd *, file_ptr, struct objfile *);
216 static void xcoff_symfile_init (struct objfile *);
218 static void xcoff_new_init (struct objfile *);
220 static void xcoff_symfile_finish (struct objfile *);
222 static char *coff_getfilename (union internal_auxent *, struct objfile *);
224 static void read_symbol (struct internal_syment *, int);
226 static int read_symbol_lineno (int);
228 static CORE_ADDR read_symbol_nvalue (int);
230 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
233 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
236 static void add_stab_to_list (char *, struct pending_stabs **);
239 static int compare_lte (const void *, const void *);
241 static struct linetable *arrange_linetable (struct linetable *);
243 static void record_include_end (struct coff_symbol *);
245 static void process_linenos (CORE_ADDR, CORE_ADDR);
248 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
250 static int secnum_to_section (int, struct objfile *);
251 static asection *secnum_to_bfd_section (int, struct objfile *);
253 struct find_targ_sec_arg
258 struct objfile *objfile;
261 static void find_targ_sec (bfd *, asection *, void *);
264 find_targ_sec (bfd *abfd, asection *sect, void *obj)
266 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
267 struct objfile *objfile = args->objfile;
269 if (sect->target_index == args->targ_index)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
273 *args->resultp = SECT_OFF_TEXT (objfile);
274 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
275 *args->resultp = SECT_OFF_DATA (objfile);
277 *args->resultp = gdb_bfd_section_index (abfd, sect);
278 *args->bfd_sect = sect;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
292 asection **bfd_sect, int *secnum)
294 struct find_targ_sec_arg args;
296 args.targ_index = n_scnum;
297 args.resultp = secnum;
298 args.bfd_sect = bfd_sect;
299 args.objfile = objfile;
302 *secnum = SECT_OFF_TEXT (objfile);
304 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum, struct objfile *objfile)
315 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
327 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
338 if (*stabvector == NULL)
340 *stabvector = (struct pending_stabs *)
341 xmalloc (sizeof (struct pending_stabs) +
342 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
343 (*stabvector)->count = 0;
344 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
346 else if ((*stabvector)->count >= (*stabvector)->length)
348 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
349 *stabvector = (struct pending_stabs *)
350 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
351 (*stabvector)->length * sizeof (char *));
353 (*stabvector)->stab[(*stabvector)->count++] = stabname;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
413 /* compare line table entry addresses. */
416 compare_lte (const void *lte1p, const void *lte2p)
418 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
419 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
421 return lte1->pc - lte2->pc;
424 /* Given a line table with function entries are marked, arrange its
425 functions in ascending order and strip off function entry markers
426 and return it in a newly created table. If the old one is good
427 enough, return the old one. */
428 /* FIXME: I think all this stuff can be replaced by just passing
429 sort_linevec = 1 to end_symtab. */
431 static struct linetable *
432 arrange_linetable (struct linetable *oldLineTb)
434 int ii, jj, newline, /* new line count */
435 function_count; /* # of functions */
437 struct linetable_entry *fentry; /* function entry vector */
438 int fentry_size; /* # of function entries */
439 struct linetable *newLineTb; /* new line table */
442 #define NUM_OF_FUNCTIONS 20
444 fentry_size = NUM_OF_FUNCTIONS;
445 fentry = (struct linetable_entry *)
446 xmalloc (fentry_size * sizeof (struct linetable_entry));
448 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
450 if (oldLineTb->item[ii].line == 0)
451 { /* Function entry found. */
452 if (function_count >= fentry_size)
453 { /* Make sure you have room. */
455 fentry = (struct linetable_entry *)
457 fentry_size * sizeof (struct linetable_entry));
459 fentry[function_count].line = ii;
460 fentry[function_count].pc = oldLineTb->item[ii].pc;
463 /* If the function was compiled with XLC, we may have to add an
464 extra line entry later. Reserve space for that. */
465 if (ii + 1 < oldLineTb->nitems
466 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
471 if (function_count == 0)
476 else if (function_count > 1)
477 qsort (fentry, function_count,
478 sizeof (struct linetable_entry), compare_lte);
480 /* Allocate a new line table. */
481 newLineTb = (struct linetable *)
483 (sizeof (struct linetable) +
484 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
486 /* If line table does not start with a function beginning, copy up until
490 if (oldLineTb->item[0].line != 0)
492 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
493 newLineTb->item[newline] = oldLineTb->item[newline];
495 /* Now copy function lines one by one. */
497 for (ii = 0; ii < function_count; ++ii)
499 /* If the function was compiled with XLC, we may have to add an
500 extra line to cover the function prologue. */
501 jj = fentry[ii].line;
502 if (jj + 1 < oldLineTb->nitems
503 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
505 newLineTb->item[newline] = oldLineTb->item[jj];
506 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
510 for (jj = fentry[ii].line + 1;
511 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
513 newLineTb->item[newline] = oldLineTb->item[jj];
516 /* The number of items in the line table must include these
517 extra lines which were added in case of XLC compiled functions. */
518 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
522 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
523 following `IncludeChain'. At the end of each symtab (end_symtab),
524 we will determine if we should create additional symtab's to
525 represent if (the include files. */
528 typedef struct _inclTable
530 char *name; /* include filename */
532 /* Offsets to the line table. end points to the last entry which is
533 part of this include file. */
536 struct subfile *subfile;
537 unsigned funStartLine; /* Start line # of its function. */
541 #define INITIAL_INCLUDE_TABLE_LENGTH 20
542 static InclTable *inclTable; /* global include table */
543 static int inclIndx; /* last entry to table */
544 static int inclLength; /* table length */
545 static int inclDepth; /* nested include depth */
547 static void allocate_include_entry (void);
550 record_include_begin (struct coff_symbol *cs)
554 /* In xcoff, we assume include files cannot be nested (not in .c files
555 of course, but in corresponding .s files.). */
557 /* This can happen with old versions of GCC.
558 GCC 2.3.3-930426 does not exhibit this on a test case which
559 a user said produced the message for him. */
560 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
564 allocate_include_entry ();
566 inclTable[inclIndx].name = cs->c_name;
567 inclTable[inclIndx].begin = cs->c_value;
571 record_include_end (struct coff_symbol *cs)
577 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
580 allocate_include_entry ();
582 pTbl = &inclTable[inclIndx];
583 pTbl->end = cs->c_value;
590 allocate_include_entry (void)
592 if (inclTable == NULL)
594 inclTable = (InclTable *)
595 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
597 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
598 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
601 else if (inclIndx >= inclLength)
603 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
604 inclTable = (InclTable *)
605 xrealloc (inclTable, sizeof (InclTable) * inclLength);
606 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
607 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
611 /* Global variable to pass the psymtab down to all the routines involved
612 in psymtab to symtab processing. */
613 static struct partial_symtab *this_symtab_psymtab;
615 /* Objfile related to this_symtab_psymtab; set at the same time. */
616 static struct objfile *this_symtab_objfile;
618 /* given the start and end addresses of a compilation unit (or a csect,
619 at times) process its lines and create appropriate line vectors. */
622 process_linenos (CORE_ADDR start, CORE_ADDR end)
626 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
628 /* subfile structure for the main compilation unit. */
629 struct subfile main_subfile;
631 /* In the main source file, any time we see a function entry, we
632 reset this variable to function's absolute starting line number.
633 All the following line numbers in the function are relative to
634 this, and we record absolute line numbers in record_line(). */
636 unsigned int main_source_baseline = 0;
641 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
643 goto return_after_cleanup;
645 memset (&main_subfile, '\0', sizeof (main_subfile));
648 /* All source lines were in the main source file. None in include
651 enter_line_range (&main_subfile, offset, 0, start, end,
652 &main_source_baseline);
656 /* There was source with line numbers in include files. */
659 coff_data (this_symtab_objfile->obfd)->local_linesz;
660 main_source_baseline = 0;
662 for (ii = 0; ii < inclIndx; ++ii)
664 struct subfile *tmpSubfile;
666 /* If there is main file source before include file, enter it. */
667 if (offset < inclTable[ii].begin)
670 (&main_subfile, offset, inclTable[ii].begin - linesz,
671 start, 0, &main_source_baseline);
674 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
676 /* The entry in the include table refers to the main source
677 file. Add the lines to the main subfile. */
679 main_source_baseline = inclTable[ii].funStartLine;
681 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
682 start, 0, &main_source_baseline);
683 inclTable[ii].subfile = &main_subfile;
687 /* Have a new subfile for the include file. */
689 tmpSubfile = inclTable[ii].subfile =
690 (struct subfile *) xmalloc (sizeof (struct subfile));
692 memset (tmpSubfile, '\0', sizeof (struct subfile));
693 firstLine = &(inclTable[ii].funStartLine);
695 /* Enter include file's lines now. */
696 enter_line_range (tmpSubfile, inclTable[ii].begin,
697 inclTable[ii].end, start, 0, firstLine);
700 if (offset <= inclTable[ii].end)
701 offset = inclTable[ii].end + linesz;
704 /* All the include files' line have been processed at this point. Now,
705 enter remaining lines of the main file, if any left. */
706 if (offset < max_offset + 1 - linesz)
708 enter_line_range (&main_subfile, offset, 0, start, end,
709 &main_source_baseline);
713 /* Process main file's line numbers. */
714 if (main_subfile.line_vector)
716 struct linetable *lineTb, *lv;
718 lv = main_subfile.line_vector;
720 /* Line numbers are not necessarily ordered. xlc compilation will
721 put static function to the end. */
723 lineTb = arrange_linetable (lv);
726 current_subfile->line_vector = (struct linetable *)
727 xrealloc (lv, (sizeof (struct linetable)
728 + lv->nitems * sizeof (struct linetable_entry)));
733 current_subfile->line_vector = lineTb;
736 current_subfile->line_vector_length =
737 current_subfile->line_vector->nitems;
740 /* Now, process included files' line numbers. */
742 for (ii = 0; ii < inclIndx; ++ii)
744 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
745 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
748 struct linetable *lineTb, *lv;
750 lv = (inclTable[ii].subfile)->line_vector;
752 /* Line numbers are not necessarily ordered. xlc compilation will
753 put static function to the end. */
755 lineTb = arrange_linetable (lv);
759 /* For the same include file, we might want to have more than one
760 subfile. This happens if we have something like:
768 while foo.h including code in it. (stupid but possible)
769 Since start_subfile() looks at the name and uses an
770 existing one if finds, we need to provide a fake name and
774 start_subfile (inclTable[ii].name, (char *) 0);
777 /* Pick a fake name that will produce the same results as this
778 one when passed to deduce_language_from_filename. Kludge on
780 char *fakename = strrchr (inclTable[ii].name, '.');
782 if (fakename == NULL)
784 start_subfile (fakename, (char *) 0);
785 xfree (current_subfile->name);
787 current_subfile->name = xstrdup (inclTable[ii].name);
792 current_subfile->line_vector =
793 (struct linetable *) xrealloc
794 (lv, (sizeof (struct linetable)
795 + lv->nitems * sizeof (struct linetable_entry)));
801 current_subfile->line_vector = lineTb;
804 current_subfile->line_vector_length =
805 current_subfile->line_vector->nitems;
806 start_subfile (pop_subfile (), (char *) 0);
810 return_after_cleanup:
812 /* We don't want to keep alloc/free'ing the global include file table. */
815 /* Start with a fresh subfile structure for the next file. */
816 memset (&main_subfile, '\0', sizeof (struct subfile));
820 aix_process_linenos (struct objfile *objfile)
822 /* There is no linenos to read if there are only dwarf info. */
823 if (this_symtab_psymtab == NULL)
826 /* Process line numbers and enter them into line vector. */
827 process_linenos (last_source_start_addr, cur_src_end_addr);
831 /* Enter a given range of lines into the line vector.
832 can be called in the following two ways:
833 enter_line_range (subfile, beginoffset, endoffset,
834 startaddr, 0, firstLine) or
835 enter_line_range (subfile, beginoffset, 0,
836 startaddr, endaddr, firstLine)
838 endoffset points to the last line table entry that we should pay
842 enter_line_range (struct subfile *subfile, unsigned beginoffset,
843 unsigned endoffset, /* offsets to line table */
844 CORE_ADDR startaddr, /* offsets to line table */
845 CORE_ADDR endaddr, unsigned *firstLine)
847 struct objfile *objfile = this_symtab_objfile;
848 struct gdbarch *gdbarch = get_objfile_arch (objfile);
849 unsigned int curoffset;
852 struct internal_lineno int_lnno;
853 unsigned int limit_offset;
857 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
859 curoffset = beginoffset;
860 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
864 if (endoffset >= limit_offset)
866 complaint (&symfile_complaints,
867 _("Bad line table offset in C_EINCL directive"));
870 limit_offset = endoffset;
875 abfd = objfile->obfd;
876 linesz = coff_data (abfd)->local_linesz;
877 ext_lnno = alloca (linesz);
879 while (curoffset <= limit_offset)
881 bfd_seek (abfd, curoffset, SEEK_SET);
882 bfd_bread (ext_lnno, linesz, abfd);
883 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
885 /* Find the address this line represents. */
886 addr = (int_lnno.l_lnno
887 ? int_lnno.l_addr.l_paddr
888 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
889 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
891 if (addr < startaddr || (endaddr && addr >= endaddr))
894 if (int_lnno.l_lnno == 0)
896 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
897 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
901 record_line (subfile, *firstLine + int_lnno.l_lnno,
902 gdbarch_addr_bits_remove (gdbarch, addr));
908 /* Save the vital information for use when closing off the current file.
909 NAME is the file name the symbols came from, START_ADDR is the first
910 text address for the file, and SIZE is the number of bytes of text. */
912 #define complete_symtab(name, start_addr) { \
913 set_last_source_file (name); \
914 last_source_start_addr = start_addr; \
918 /* Refill the symbol table input buffer
919 and set the variables that control fetching entries from it.
920 Reports an error if no data available.
921 This function can read past the end of the symbol table
922 (into the string table) but this does no harm. */
924 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
926 Creation of all new minimal symbols should go through this function
927 rather than calling the various prim_record_[...] functions in order
928 to make sure that all symbol addresses get properly relocated.
932 NAME - the symbol's name (but if NAME starts with a period, that
933 leading period is discarded).
934 ADDRESS - the symbol's address, prior to relocation. This function
935 relocates the address before recording the minimal symbol.
936 MS_TYPE - the symbol's type.
937 N_SCNUM - the symbol's XCOFF section number.
938 OBJFILE - the objfile associated with the minimal symbol. */
941 record_minimal_symbol (const char *name, CORE_ADDR address,
942 enum minimal_symbol_type ms_type,
944 struct objfile *objfile)
946 int section = secnum_to_section (n_scnum, objfile);
951 address += ANOFFSET (objfile->section_offsets, section);
952 prim_record_minimal_symbol_and_info (name, address, ms_type,
953 secnum_to_section (n_scnum, objfile),
957 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
958 nested. At any given time, a symbol can only be in one static block.
959 This is the base address of current static block, zero if non exists. */
961 static int static_block_base = 0;
963 /* Section number for the current static block. */
965 static int static_block_section = -1;
967 /* true if space for symbol name has been allocated. */
969 static int symname_alloced = 0;
971 /* Next symbol to read. Pointer into raw seething symbol table. */
973 static char *raw_symbol;
975 /* This is the function which stabsread.c calls to get symbol
979 xcoff_next_symbol_text (struct objfile *objfile)
981 struct internal_syment symbol;
984 /* FIXME: is this the same as the passed arg? */
985 if (this_symtab_objfile)
986 objfile = this_symtab_objfile;
988 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
991 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
993 /* Return something which points to '\0' and hope the symbol reading
994 code does something reasonable. */
997 else if (symbol.n_sclass & 0x80)
999 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
1000 raw_symbol += coff_data (objfile->obfd)->local_symesz;
1005 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
1007 /* Return something which points to '\0' and hope the symbol reading
1008 code does something reasonable. */
1014 /* Read symbols for a given partial symbol table. */
1017 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1019 bfd *abfd = objfile->obfd;
1020 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1021 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1022 char *strtbl = xcoff->strtbl;
1023 char *debugsec = xcoff->debugsec;
1024 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1026 struct internal_syment symbol[1];
1027 union internal_auxent main_aux;
1028 struct coff_symbol cs[1];
1029 CORE_ADDR file_start_addr = 0;
1030 CORE_ADDR file_end_addr = 0;
1032 int next_file_symnum = -1;
1033 unsigned int max_symnum;
1034 int just_started = 1;
1036 CORE_ADDR fcn_start_addr = 0;
1038 struct coff_symbol fcn_stab_saved = { 0 };
1040 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1041 union internal_auxent fcn_aux_saved = main_aux;
1042 struct context_stack *new;
1044 char *filestring = " _start_ "; /* Name of the current file. */
1046 const char *last_csect_name; /* Last seen csect's name. */
1048 this_symtab_psymtab = pst;
1049 this_symtab_objfile = objfile;
1051 /* Get the appropriate COFF "constants" related to the file we're
1053 local_symesz = coff_data (abfd)->local_symesz;
1055 set_last_source_file (NULL);
1056 last_csect_name = 0;
1059 start_symtab (filestring, (char *) NULL, file_start_addr);
1060 record_debugformat (debugfmt);
1061 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1063 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1064 first_object_file_end = 0;
1066 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1068 while (symnum < max_symnum)
1070 QUIT; /* make this command interruptable. */
1072 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1073 /* read one symbol into `cs' structure. After processing the
1074 whole symbol table, only string table will be kept in memory,
1075 symbol table and debug section of xcoff will be freed. Thus
1076 we can mark symbols with names in string table as
1081 /* Swap and align the symbol into a reasonable C structure. */
1082 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1084 cs->c_symnum = symnum;
1085 cs->c_naux = symbol->n_numaux;
1086 if (symbol->n_zeroes)
1088 symname_alloced = 0;
1089 /* We must use the original, unswapped, name here so the name field
1090 pointed to by cs->c_name will persist throughout xcoffread. If
1091 we use the new field, it gets overwritten for each symbol. */
1092 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1093 /* If it's exactly E_SYMNMLEN characters long it isn't
1095 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1099 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
1100 strncpy (p, cs->c_name, E_SYMNMLEN);
1101 p[E_SYMNMLEN] = '\0';
1103 symname_alloced = 1;
1106 else if (symbol->n_sclass & 0x80)
1108 cs->c_name = debugsec + symbol->n_offset;
1109 symname_alloced = 0;
1113 /* in string table */
1114 cs->c_name = strtbl + (int) symbol->n_offset;
1115 symname_alloced = 1;
1117 cs->c_value = symbol->n_value;
1118 cs->c_sclass = symbol->n_sclass;
1119 cs->c_secnum = symbol->n_scnum;
1120 cs->c_type = (unsigned) symbol->n_type;
1122 raw_symbol += local_symesz;
1125 /* Save addr of first aux entry. */
1126 raw_auxptr = raw_symbol;
1128 /* Skip all the auxents associated with this symbol. */
1129 for (ii = symbol->n_numaux; ii; --ii)
1131 raw_symbol += coff_data (abfd)->local_auxesz;
1136 /* if symbol name starts with ".$" or "$", ignore it. */
1137 if (cs->c_name[0] == '$'
1138 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1141 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1143 if (get_last_source_file ())
1145 pst->symtab = end_symtab (cur_src_end_addr, objfile,
1146 SECT_OFF_TEXT (objfile));
1151 start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0);
1152 record_debugformat (debugfmt);
1153 cur_src_end_addr = first_object_file_end;
1154 /* Done with all files, everything from here on is globals. */
1157 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1160 /* Dealing with a symbol with a csect entry. */
1162 #define CSECT(PP) ((PP)->x_csect)
1163 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1164 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1165 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1166 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1168 /* Convert the auxent to something we can access. */
1169 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1170 0, cs->c_naux, &main_aux);
1172 switch (CSECT_SMTYP (&main_aux))
1176 /* Ignore all external references. */
1180 /* A section description. */
1182 switch (CSECT_SCLAS (&main_aux))
1188 /* A program csect is seen. We have to allocate one
1189 symbol table for each program csect. Normally gdb
1190 prefers one symtab for each source file. In case
1191 of AIX, one source file might include more than one
1192 [PR] csect, and they don't have to be adjacent in
1193 terms of the space they occupy in memory. Thus, one
1194 single source file might get fragmented in the
1195 memory and gdb's file start and end address
1196 approach does not work! GCC (and I think xlc) seem
1197 to put all the code in the unnamed program csect. */
1199 if (last_csect_name)
1201 complete_symtab (filestring, file_start_addr);
1202 cur_src_end_addr = file_end_addr;
1203 end_symtab (file_end_addr, objfile,
1204 SECT_OFF_TEXT (objfile));
1207 /* Give all csects for this source file the same
1209 start_symtab (filestring, NULL, (CORE_ADDR) 0);
1210 record_debugformat (debugfmt);
1213 /* If this is the very first csect seen,
1214 basically `__start'. */
1217 first_object_file_end
1218 = cs->c_value + CSECT_LEN (&main_aux);
1223 cs->c_value + ANOFFSET (objfile->section_offsets,
1224 SECT_OFF_TEXT (objfile));
1225 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1227 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1228 last_csect_name = cs->c_name;
1232 /* All other symbols are put into the minimal symbol
1245 /* Ignore the symbol. */
1253 switch (CSECT_SCLAS (&main_aux))
1256 /* a function entry point. */
1257 function_entry_point:
1259 fcn_start_addr = cs->c_value;
1261 /* save the function header info, which will be used
1262 when `.bf' is seen. */
1264 fcn_aux_saved = main_aux;
1268 /* shared library function trampoline code entry point. */
1272 /* The symbols often have the same names as debug symbols for
1273 functions, and confuse lookup_symbol. */
1277 /* xlc puts each variable in a separate csect, so we get
1278 an XTY_SD for each variable. But gcc puts several
1279 variables in a csect, so that each variable only gets
1280 an XTY_LD. This will typically be XMC_RW; I suspect
1281 XMC_RO and XMC_BS might be possible too.
1282 These variables are put in the minimal symbol table
1289 /* Common symbols are put into the minimal symbol table only. */
1297 /* If explicitly specified as a function, treat is as one. This check
1298 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1299 after the above CSECT check. */
1300 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1302 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1303 0, cs->c_naux, &main_aux);
1304 goto function_entry_point;
1307 switch (cs->c_sclass)
1311 /* c_value field contains symnum of next .file entry in table
1312 or symnum of first global after last .file. */
1314 next_file_symnum = cs->c_value;
1316 /* Complete symbol table for last object file containing
1317 debugging information. */
1319 /* Whether or not there was a csect in the previous file, we
1320 have to call `end_stabs' and `start_stabs' to reset
1321 type_vector, line_vector, etc. structures. */
1323 complete_symtab (filestring, file_start_addr);
1324 cur_src_end_addr = file_end_addr;
1325 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1328 /* XCOFF, according to the AIX 3.2 documentation, puts the
1329 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1330 do things the standard COFF way and put it in the auxent.
1331 We use the auxent if the symbol is ".file" and an auxent
1332 exists, otherwise use the symbol itself. Simple
1334 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1336 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1337 0, cs->c_naux, &main_aux);
1338 filestring = coff_getfilename (&main_aux, objfile);
1341 filestring = cs->c_name;
1344 start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0);
1345 record_debugformat (debugfmt);
1346 last_csect_name = 0;
1348 /* reset file start and end addresses. A compilation unit
1349 with no text (only data) should have zero file
1351 file_start_addr = file_end_addr = 0;
1355 fcn_stab_saved = *cs;
1359 if (strcmp (cs->c_name, ".bf") == 0)
1361 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1362 SECT_OFF_TEXT (objfile));
1364 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1365 0, cs->c_naux, &main_aux);
1367 within_function = 1;
1369 new = push_context (0, fcn_start_addr + off);
1371 new->name = define_symbol
1372 (fcn_cs_saved.c_value + off,
1373 fcn_stab_saved.c_name, 0, 0, objfile);
1374 if (new->name != NULL)
1375 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1377 else if (strcmp (cs->c_name, ".ef") == 0)
1379 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1380 0, cs->c_naux, &main_aux);
1382 /* The value of .ef is the address of epilogue code;
1383 not useful for gdb. */
1384 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1385 contains number of lines to '}' */
1387 if (context_stack_depth <= 0)
1388 { /* We attempted to pop an empty context stack. */
1389 ef_complaint (cs->c_symnum);
1390 within_function = 0;
1393 new = pop_context ();
1394 /* Stack must be empty now. */
1395 if (context_stack_depth > 0 || new == NULL)
1397 ef_complaint (cs->c_symnum);
1398 within_function = 0;
1402 finish_block (new->name, &local_symbols, new->old_blocks,
1404 (fcn_cs_saved.c_value
1405 + fcn_aux_saved.x_sym.x_misc.x_fsize
1406 + ANOFFSET (objfile->section_offsets,
1407 SECT_OFF_TEXT (objfile))),
1409 within_function = 0;
1414 /* Begin static block. */
1416 struct internal_syment symbol;
1418 read_symbol (&symbol, cs->c_value);
1419 static_block_base = symbol.n_value;
1420 static_block_section =
1421 secnum_to_section (symbol.n_scnum, objfile);
1426 /* End of static block. */
1427 static_block_base = 0;
1428 static_block_section = -1;
1439 complaint (&symfile_complaints,
1440 _("Unrecognized storage class %d."),
1455 /* beginning of include file */
1456 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1457 order. Thus, when wee see them, we might not know enough info
1458 to process them. Thus, we'll be saving them into a table
1459 (inclTable) and postpone their processing. */
1461 record_include_begin (cs);
1465 /* End of include file. */
1466 /* See the comment after case C_BINCL. */
1467 record_include_end (cs);
1471 if (strcmp (cs->c_name, ".bb") == 0)
1474 new = push_context (depth,
1476 + ANOFFSET (objfile->section_offsets,
1477 SECT_OFF_TEXT (objfile))));
1479 else if (strcmp (cs->c_name, ".eb") == 0)
1481 if (context_stack_depth <= 0)
1482 { /* We attempted to pop an empty context stack. */
1483 eb_complaint (cs->c_symnum);
1486 new = pop_context ();
1487 if (depth-- != new->depth)
1489 eb_complaint (cs->c_symnum);
1492 if (local_symbols && context_stack_depth > 0)
1494 /* Make a block for the local symbols within. */
1495 finish_block (new->name, &local_symbols, new->old_blocks,
1498 + ANOFFSET (objfile->section_offsets,
1499 SECT_OFF_TEXT (objfile))),
1502 local_symbols = new->locals;
1507 process_xcoff_symbol (cs, objfile);
1512 if (get_last_source_file ())
1516 complete_symtab (filestring, file_start_addr);
1517 cur_src_end_addr = file_end_addr;
1518 s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1519 /* When reading symbols for the last C_FILE of the objfile, try
1520 to make sure that we set pst->symtab to the symtab for the
1521 file, not to the _globals_ symtab. I'm not sure whether this
1522 actually works right or when/if it comes up. */
1523 if (pst->symtab == NULL)
1529 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1530 (SYMBOL2) = (struct symbol *) \
1531 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1532 *(SYMBOL2) = *(SYMBOL1);
1535 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1536 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1537 (NAME), strlen (NAME)))
1540 /* process one xcoff symbol. */
1542 static struct symbol *
1543 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1545 struct symbol onesymbol;
1546 struct symbol *sym = &onesymbol;
1547 struct symbol *sym2 = NULL;
1553 if (cs->c_secnum < 0)
1555 /* The value is a register number, offset within a frame, etc.,
1556 and does not get relocated. */
1562 sec = secnum_to_section (cs->c_secnum, objfile);
1563 off = ANOFFSET (objfile->section_offsets, sec);
1570 initialize_symbol (sym);
1572 /* default assumptions */
1573 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1574 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1575 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1577 if (ISFCN (cs->c_type))
1579 /* At this point, we don't know the type of the function. This
1580 will be patched with the type from its stab entry later on in
1581 patch_block_stabs (), unless the file was compiled without -g. */
1583 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1584 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1586 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1587 SYMBOL_DUP (sym, sym2);
1589 if (cs->c_sclass == C_EXT)
1590 add_symbol_to_list (sym2, &global_symbols);
1591 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1592 add_symbol_to_list (sym2, &file_symbols);
1596 /* In case we can't figure out the type, provide default. */
1597 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1599 switch (cs->c_sclass)
1602 /* The values of functions and global symbols are now resolved
1603 via the global_sym_chain in stabsread.c. */
1605 if (fcn_cs_saved.c_sclass == C_EXT)
1606 add_stab_to_list (name, &global_stabs);
1608 add_stab_to_list (name, &file_stabs);
1612 add_stab_to_list (name, &global_stabs);
1617 common_block_start (cs->c_name, objfile);
1621 common_block_end (objfile);
1625 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1638 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1641 SYMBOL_SECTION (sym) = sec;
1648 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1649 all statics and we need to distinguish file-scope versus
1650 function-scope using within_function. We do this by
1651 changing the string we pass to define_symbol to use 'S'
1652 where we need to, which is not necessarily super-clean,
1653 but seems workable enough. */
1658 pp = strchr (name, ':');
1663 if (*pp == 'V' && !within_function)
1665 sym = define_symbol ((cs->c_value
1666 + ANOFFSET (objfile->section_offsets,
1667 static_block_section)),
1668 cs->c_name, 0, 0, objfile);
1671 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1672 SYMBOL_SECTION (sym) = static_block_section;
1681 /* Extract the file name from the aux entry of a C_FILE symbol.
1682 Result is in static storage and is only good for temporary use. */
1685 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1687 static char buffer[BUFSIZ];
1689 if (aux_entry->x_file.x_n.x_zeroes == 0)
1690 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1691 + aux_entry->x_file.x_n.x_offset));
1694 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1695 buffer[FILNMLEN] = '\0';
1700 /* Set *SYMBOL to symbol number symno in symtbl. */
1702 read_symbol (struct internal_syment *symbol, int symno)
1704 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1705 int nsyms = xcoff->symtbl_num_syms;
1706 char *stbl = xcoff->symtbl;
1708 if (symno < 0 || symno >= nsyms)
1710 complaint (&symfile_complaints, _("Invalid symbol offset"));
1711 symbol->n_value = 0;
1712 symbol->n_scnum = -1;
1715 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1716 stbl + (symno * local_symesz),
1720 /* Get value corresponding to symbol number symno in symtbl. */
1723 read_symbol_nvalue (int symno)
1725 struct internal_syment symbol[1];
1727 read_symbol (symbol, symno);
1728 return symbol->n_value;
1732 /* Find the address of the function corresponding to symno, where
1733 symno is the symbol pointed to by the linetable. */
1736 read_symbol_lineno (int symno)
1738 struct objfile *objfile = this_symtab_objfile;
1739 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1741 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1742 int nsyms = info->symtbl_num_syms;
1743 char *stbl = info->symtbl;
1744 char *strtbl = info->strtbl;
1746 struct internal_syment symbol[1];
1747 union internal_auxent main_aux[1];
1751 bf_notfound_complaint ();
1755 /* Note that just searching for a short distance (e.g. 50 symbols)
1756 is not enough, at least in the following case.
1759 [many .stabx entries]
1760 [a few functions, referring to foo]
1764 What happens here is that the assembler moves the .stabx entries
1765 to right before the ".bf" for foo, but the symbol for "foo" is before
1766 all the stabx entries. See PR gdb/2222. */
1768 /* Maintaining a table of .bf entries might be preferable to this search.
1769 If I understand things correctly it would need to be done only for
1770 the duration of a single psymtab to symtab conversion. */
1771 while (symno < nsyms)
1773 bfd_coff_swap_sym_in (symfile_bfd,
1774 stbl + (symno * local_symesz), symbol);
1775 if (symbol->n_sclass == C_FCN)
1777 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1779 if (strcmp (name, ".bf") == 0)
1782 symno += symbol->n_numaux + 1;
1785 bf_notfound_complaint ();
1789 /* Take aux entry and return its lineno. */
1791 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1792 symbol->n_type, symbol->n_sclass,
1793 0, symbol->n_numaux, main_aux);
1795 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1798 /* Support for line number handling. */
1800 /* This function is called for every section; it finds the outer limits
1801 * of the line table (minimum and maximum file offset) so that the
1802 * mainline code can read the whole thing for efficiency.
1805 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1807 struct coff_symfile_info *info;
1809 file_ptr offset, maxoff;
1811 count = asect->lineno_count;
1813 if (strcmp (asect->name, ".text") != 0 || count == 0)
1816 size = count * coff_data (abfd)->local_linesz;
1817 info = (struct coff_symfile_info *) vpinfo;
1818 offset = asect->line_filepos;
1819 maxoff = offset + size;
1821 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1822 info->min_lineno_offset = offset;
1824 if (maxoff > info->max_lineno_offset)
1825 info->max_lineno_offset = maxoff;
1829 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1831 struct cleanup *old_chain;
1840 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1845 /* Read in all partial symtabs on which this one is dependent. */
1846 for (i = 0; i < pst->number_of_dependencies; i++)
1847 if (!pst->dependencies[i]->readin)
1849 /* Inform about additional files that need to be read in. */
1852 fputs_filtered (" ", gdb_stdout);
1854 fputs_filtered ("and ", gdb_stdout);
1856 printf_filtered ("%s...", pst->dependencies[i]->filename);
1857 wrap_here (""); /* Flush output */
1858 gdb_flush (gdb_stdout);
1860 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1863 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1865 /* Init stuff necessary for reading in symbols. */
1868 old_chain = make_cleanup (really_free_pendings, 0);
1870 read_xcoff_symtab (objfile, pst);
1872 do_cleanups (old_chain);
1878 /* Read in all of the symbols for a given psymtab for real.
1879 Be verbose about it if the user wants that. SELF is not NULL. */
1882 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1887 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1892 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1893 || self->number_of_dependencies)
1895 /* Print the message now, before reading the string table,
1896 to avoid disconcerting pauses. */
1899 printf_filtered ("Reading in symbols for %s...", self->filename);
1900 gdb_flush (gdb_stdout);
1903 next_symbol_text_func = xcoff_next_symbol_text;
1905 xcoff_psymtab_to_symtab_1 (objfile, self);
1907 /* Match with global symbols. This only needs to be done once,
1908 after all of the symtabs and dependencies have been read in. */
1909 scan_file_globals (objfile);
1911 /* Finish up the debug error message. */
1913 printf_filtered ("done.\n");
1918 xcoff_new_init (struct objfile *objfile)
1920 stabsread_new_init ();
1921 buildsym_new_init ();
1924 /* Do initialization in preparation for reading symbols from OBJFILE.
1926 We will only be called if this is an XCOFF or XCOFF-like file.
1927 BFD handles figuring out the format of the file, and code in symfile.c
1928 uses BFD's determination to vector to us. */
1931 xcoff_symfile_init (struct objfile *objfile)
1933 struct coff_symfile_info *xcoff;
1935 /* Allocate struct to keep track of the symfile. */
1936 xcoff = XNEW (struct coff_symfile_info);
1937 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1939 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1940 find this causes a significant slowdown in gdb then we could
1941 set it in the debug symbol readers only when necessary. */
1942 objfile->flags |= OBJF_REORDERED;
1945 /* Perform any local cleanups required when we are done with a particular
1946 objfile. I.E, we are in the process of discarding all symbol information
1947 for an objfile, freeing up all memory held for it, and unlinking the
1948 objfile struct from the global list of known objfiles. */
1951 xcoff_symfile_finish (struct objfile *objfile)
1953 /* Start with a fresh include table for the next objfile. */
1959 inclIndx = inclLength = inclDepth = 0;
1961 dwarf2_free_objfile (objfile);
1966 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1970 unsigned char lengthbuf[4];
1972 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1974 xcoff->strtbl = NULL;
1976 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1977 error (_("cannot seek to string table in %s: %s"),
1978 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1980 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1981 length = bfd_h_get_32 (abfd, lengthbuf);
1983 /* If no string table is needed, then the file may end immediately
1984 after the symbols. Just return with `strtbl' set to NULL. */
1986 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1989 /* Allocate string table from objfile_obstack. We will need this table
1990 as long as we have its symbol table around. */
1992 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1993 xcoff->strtbl = strtbl;
1995 /* Copy length buffer, the first byte is usually zero and is
1996 used for stabs with a name length of zero. */
1997 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1998 if (length == sizeof lengthbuf)
2001 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
2003 if (val != length - sizeof lengthbuf)
2004 error (_("cannot read string table from %s: %s"),
2005 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
2006 if (strtbl[length - 1] != '\0')
2007 error (_("bad symbol file: string table "
2008 "does not end with null character"));
2013 /* If we have not yet seen a function for this psymtab, this is 0. If we
2014 have seen one, it is the offset in the line numbers of the line numbers
2016 static unsigned int first_fun_line_offset;
2018 /* Allocate and partially fill a partial symtab. It will be
2019 completely filled at the end of the symbol list.
2021 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2022 is the address relative to which its symbols are (incremental) or 0
2025 static struct partial_symtab *
2026 xcoff_start_psymtab (struct objfile *objfile,
2027 const char *filename, int first_symnum,
2028 struct partial_symbol **global_syms,
2029 struct partial_symbol **static_syms)
2031 struct partial_symtab *result =
2032 start_psymtab_common (objfile, objfile->section_offsets,
2034 /* We fill in textlow later. */
2036 global_syms, static_syms);
2038 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2039 sizeof (struct symloc));
2040 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2041 result->read_symtab = xcoff_read_symtab;
2043 /* Deduce the source language from the filename for this psymtab. */
2044 psymtab_language = deduce_language_from_filename (filename);
2049 /* Close off the current usage of PST.
2050 Returns PST, or NULL if the partial symtab was empty and thrown away.
2052 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2054 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2055 are the information for includes and dependencies. */
2057 static struct partial_symtab *
2058 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2059 const char **include_list, int num_includes,
2060 int capping_symbol_number,
2061 struct partial_symtab **dependency_list,
2062 int number_dependencies, int textlow_not_set)
2066 if (capping_symbol_number != -1)
2067 ((struct symloc *) pst->read_symtab_private)->numsyms =
2068 capping_symbol_number
2069 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2070 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2071 first_fun_line_offset;
2072 first_fun_line_offset = 0;
2073 pst->n_global_syms = objfile->global_psymbols.next
2074 - (objfile->global_psymbols.list + pst->globals_offset);
2075 pst->n_static_syms = objfile->static_psymbols.next
2076 - (objfile->static_psymbols.list + pst->statics_offset);
2078 pst->number_of_dependencies = number_dependencies;
2079 if (number_dependencies)
2081 pst->dependencies = (struct partial_symtab **)
2082 obstack_alloc (&objfile->objfile_obstack,
2083 number_dependencies * sizeof (struct partial_symtab *));
2084 memcpy (pst->dependencies, dependency_list,
2085 number_dependencies * sizeof (struct partial_symtab *));
2088 pst->dependencies = 0;
2090 for (i = 0; i < num_includes; i++)
2092 struct partial_symtab *subpst =
2093 allocate_psymtab (include_list[i], objfile);
2095 subpst->section_offsets = pst->section_offsets;
2096 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2097 sizeof (struct symloc));
2098 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2099 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2100 subpst->textlow = 0;
2101 subpst->texthigh = 0;
2103 /* We could save slight bits of space by only making one of these,
2104 shared by the entire set of include files. FIXME-someday. */
2105 subpst->dependencies = (struct partial_symtab **)
2106 obstack_alloc (&objfile->objfile_obstack,
2107 sizeof (struct partial_symtab *));
2108 subpst->dependencies[0] = pst;
2109 subpst->number_of_dependencies = 1;
2111 subpst->globals_offset =
2112 subpst->n_global_syms =
2113 subpst->statics_offset =
2114 subpst->n_static_syms = 0;
2118 subpst->read_symtab = pst->read_symtab;
2121 sort_pst_symbols (objfile, pst);
2123 if (num_includes == 0
2124 && number_dependencies == 0
2125 && pst->n_global_syms == 0
2126 && pst->n_static_syms == 0)
2128 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2129 it is on the obstack, but we can forget to chain it on the list. */
2130 /* Empty psymtabs happen as a result of header files which don't have
2131 any symbols in them. There can be a lot of them. */
2133 discard_psymtab (objfile, pst);
2135 /* Indicate that psymtab was thrown away. */
2136 pst = (struct partial_symtab *) NULL;
2141 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2142 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2143 the symbol and its auxents. */
2146 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2147 const char **name, char **raw, unsigned int *symnump,
2148 struct objfile *objfile)
2150 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2151 if (symbol->n_zeroes)
2153 /* If it's exactly E_SYMNMLEN characters long it isn't
2155 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2157 /* FIXME: wastes memory for symbols which we don't end up putting
2158 into the minimal symbols. */
2161 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2162 strncpy (p, symbol->n_name, E_SYMNMLEN);
2163 p[E_SYMNMLEN] = '\0';
2167 /* Point to the unswapped name as that persists as long as the
2169 *name = ((struct external_syment *) *raw)->e.e_name;
2171 else if (symbol->n_sclass & 0x80)
2173 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2177 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2180 *raw += coff_data (objfile->obfd)->local_symesz;
2181 if (symbol->n_numaux > 0)
2183 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2184 symbol->n_sclass, 0, symbol->n_numaux, aux);
2186 *symnump += symbol->n_numaux;
2187 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2192 function_outside_compilation_unit_complaint (const char *arg1)
2194 complaint (&symfile_complaints,
2195 _("function `%s' appears to be defined "
2196 "outside of all compilation units"),
2201 scan_xcoff_symtab (struct objfile *objfile)
2203 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2204 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2205 const char *filestring = NULL;
2207 const char *namestring;
2208 int past_first_source_file = 0;
2213 /* Current partial symtab */
2214 struct partial_symtab *pst;
2216 /* List of current psymtab's include files. */
2217 const char **psymtab_include_list;
2218 int includes_allocated;
2221 /* Index within current psymtab dependency list. */
2222 struct partial_symtab **dependency_list;
2223 int dependencies_used, dependencies_allocated;
2226 struct internal_syment symbol;
2227 union internal_auxent main_aux[5];
2228 unsigned int ssymnum;
2230 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2231 CORE_ADDR last_csect_val = 0;
2232 int last_csect_sec = 0;
2233 int misc_func_recorded = 0; /* true if any misc. function. */
2234 int textlow_not_set = 1;
2236 pst = (struct partial_symtab *) 0;
2238 includes_allocated = 30;
2240 psymtab_include_list = (const char **) alloca (includes_allocated *
2241 sizeof (const char *));
2243 dependencies_allocated = 30;
2244 dependencies_used = 0;
2246 (struct partial_symtab **) alloca (dependencies_allocated *
2247 sizeof (struct partial_symtab *));
2249 set_last_source_file (NULL);
2251 abfd = objfile->obfd;
2252 next_symbol_text_func = xcoff_next_symbol_text;
2254 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2255 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2257 while (ssymnum < nsyms)
2263 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2264 sclass = symbol.n_sclass;
2271 /* The CSECT auxent--always the last auxent. */
2272 union internal_auxent csect_aux;
2273 unsigned int symnum_before = ssymnum;
2275 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2277 if (symbol.n_numaux > 1)
2279 bfd_coff_swap_aux_in
2281 sraw_symbol - coff_data (abfd)->local_symesz,
2284 symbol.n_numaux - 1,
2289 csect_aux = main_aux[0];
2291 /* If symbol name starts with ".$" or "$", ignore it. */
2292 if (namestring[0] == '$'
2293 || (namestring[0] == '.' && namestring[1] == '$'))
2296 switch (csect_aux.x_csect.x_smtyp & 0x7)
2299 switch (csect_aux.x_csect.x_smclas)
2302 if (last_csect_name)
2304 /* If no misc. function recorded in the last
2305 seen csect, enter it as a function. This
2306 will take care of functions like strcmp()
2309 if (!misc_func_recorded)
2311 record_minimal_symbol
2312 (last_csect_name, last_csect_val,
2313 mst_text, last_csect_sec, objfile);
2314 misc_func_recorded = 1;
2319 /* We have to allocate one psymtab for
2320 each program csect, because their text
2321 sections need not be adjacent. */
2323 (objfile, pst, psymtab_include_list,
2324 includes_used, symnum_before, dependency_list,
2325 dependencies_used, textlow_not_set);
2327 dependencies_used = 0;
2328 /* Give all psymtabs for this source file the same
2330 pst = xcoff_start_psymtab
2334 objfile->global_psymbols.next,
2335 objfile->static_psymbols.next);
2338 /* Activate the misc_func_recorded mechanism for
2339 compiler- and linker-generated CSECTs like ".strcmp"
2341 if (namestring && (namestring[0] == '.'
2342 || namestring[0] == '@'))
2344 last_csect_name = namestring;
2345 last_csect_val = symbol.n_value;
2346 last_csect_sec = symbol.n_scnum;
2351 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2353 if (highval > pst->texthigh)
2354 pst->texthigh = highval;
2355 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2356 pst->textlow = symbol.n_value;
2358 misc_func_recorded = 0;
2363 /* Data variables are recorded in the minimal symbol
2364 table, except for section symbols. */
2365 if (*namestring != '.')
2366 record_minimal_symbol
2367 (namestring, symbol.n_value,
2368 sclass == C_HIDEXT ? mst_file_data : mst_data,
2369 symbol.n_scnum, objfile);
2374 warning (_("More than one XMC_TC0 symbol found."));
2375 toc_offset = symbol.n_value;
2377 /* Make TOC offset relative to start address of
2379 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2381 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2385 /* These symbols tell us where the TOC entry for a
2386 variable is, not the variable itself. */
2395 switch (csect_aux.x_csect.x_smclas)
2398 /* A function entry point. */
2400 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2401 first_fun_line_offset =
2402 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2404 record_minimal_symbol
2405 (namestring, symbol.n_value,
2406 sclass == C_HIDEXT ? mst_file_text : mst_text,
2407 symbol.n_scnum, objfile);
2408 misc_func_recorded = 1;
2413 /* shared library function trampoline code entry
2416 /* record trampoline code entries as
2417 mst_solib_trampoline symbol. When we lookup mst
2418 symbols, we will choose mst_text over
2419 mst_solib_trampoline. */
2420 record_minimal_symbol
2421 (namestring, symbol.n_value,
2422 mst_solib_trampoline, symbol.n_scnum, objfile);
2423 misc_func_recorded = 1;
2427 /* The symbols often have the same names as
2428 debug symbols for functions, and confuse
2434 /* xlc puts each variable in a separate csect,
2435 so we get an XTY_SD for each variable. But
2436 gcc puts several variables in a csect, so
2437 that each variable only gets an XTY_LD. We
2438 still need to record them. This will
2439 typically be XMC_RW; I suspect XMC_RO and
2440 XMC_BS might be possible too. */
2441 if (*namestring != '.')
2442 record_minimal_symbol
2443 (namestring, symbol.n_value,
2444 sclass == C_HIDEXT ? mst_file_data : mst_data,
2445 symbol.n_scnum, objfile);
2451 switch (csect_aux.x_csect.x_smclas)
2455 /* Common variables are recorded in the minimal symbol
2456 table, except for section symbols. */
2457 if (*namestring != '.')
2458 record_minimal_symbol
2459 (namestring, symbol.n_value,
2460 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2461 symbol.n_scnum, objfile);
2473 unsigned int symnum_before;
2475 symnum_before = ssymnum;
2476 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2479 /* See if the last csect needs to be recorded. */
2481 if (last_csect_name && !misc_func_recorded)
2483 /* If no misc. function recorded in the last seen csect, enter
2484 it as a function. This will take care of functions like
2485 strcmp() compiled by xlc. */
2487 record_minimal_symbol (last_csect_name, last_csect_val,
2488 mst_text, last_csect_sec, objfile);
2489 misc_func_recorded = 1;
2494 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2495 includes_used, symnum_before,
2496 dependency_list, dependencies_used,
2499 dependencies_used = 0;
2501 first_fun_line_offset = 0;
2503 /* XCOFF, according to the AIX 3.2 documentation, puts the
2504 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2505 do things the standard COFF way and put it in the auxent.
2506 We use the auxent if the symbol is ".file" and an auxent
2507 exists, otherwise use the symbol itself. */
2508 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2510 filestring = coff_getfilename (&main_aux[0], objfile);
2513 filestring = namestring;
2515 pst = xcoff_start_psymtab (objfile,
2518 objfile->global_psymbols.next,
2519 objfile->static_psymbols.next);
2520 last_csect_name = NULL;
2526 complaint (&symfile_complaints,
2527 _("Storage class %d not recognized during scan"),
2532 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2533 to handle only the C_FUN and C_EXT. */
2548 /* C_EINCL means we are switching back to the main file. But there
2549 is no reason to care; the only thing we want to know about
2550 includes is the names of all the included (.h) files. */
2555 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2559 /* I don't think the name of the common block (as opposed to the
2560 variables within it) is something which is user visible
2568 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2569 so C_LSYM would appear to be only for locals. */
2575 /* We probably could save a few instructions by assuming that
2576 C_LSYM, C_PSYM, etc., never have auxents. */
2577 int naux1 = symbol.n_numaux + 1;
2580 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2586 /* Mark down an include file in the current psymtab. */
2587 enum language tmp_language;
2589 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2592 tmp_language = deduce_language_from_filename (namestring);
2594 /* Only change the psymtab's language if we've learned
2595 something useful (eg. tmp_language is not language_unknown).
2596 In addition, to match what start_subfile does, never change
2598 if (tmp_language != language_unknown
2599 && (tmp_language != language_c
2600 || psymtab_language != language_cplus))
2601 psymtab_language = tmp_language;
2603 /* In C++, one may expect the same filename to come round many
2604 times, when code is coming alternately from the main file
2605 and from inline functions in other files. So I check to see
2606 if this is a file we've seen before -- either the main
2607 source file, or a previously included file.
2609 This seems to be a lot of time to be spending on N_SOL, but
2610 things like "break c-exp.y:435" need to work (I
2611 suppose the psymtab_include_list could be hashed or put
2612 in a binary tree, if profiling shows this is a major hog). */
2613 if (pst && strcmp (namestring, pst->filename) == 0)
2619 for (i = 0; i < includes_used; i++)
2620 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2628 psymtab_include_list[includes_used++] = namestring;
2629 if (includes_used >= includes_allocated)
2631 const char **orig = psymtab_include_list;
2633 psymtab_include_list = (const char **)
2634 alloca ((includes_allocated *= 2) *
2635 sizeof (const char *));
2636 memcpy (psymtab_include_list, orig,
2637 includes_used * sizeof (const char *));
2642 /* The value of the C_FUN is not the address of the function (it
2643 appears to be the address before linking), but as long as it
2644 is smaller than the actual address, then find_pc_partial_function
2645 will use the minimal symbols instead. I hope. */
2654 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2657 p = strchr (namestring, ':');
2659 continue; /* Not a debugging symbol. */
2661 /* Main processing section for debugging symbols which
2662 the initial read through the symbol tables needs to worry
2663 about. If we reach this point, the symbol which we are
2664 considering is definitely one we are interested in.
2665 p must also contain the (valid) index into the namestring
2666 which indicates the debugging type symbol. */
2671 symbol.n_value += ANOFFSET (objfile->section_offsets,
2672 SECT_OFF_DATA (objfile));
2674 if (gdbarch_static_transform_name_p (gdbarch))
2675 namestring = gdbarch_static_transform_name
2676 (gdbarch, namestring);
2678 add_psymbol_to_list (namestring, p - namestring, 1,
2679 VAR_DOMAIN, LOC_STATIC,
2680 &objfile->static_psymbols,
2682 psymtab_language, objfile);
2686 symbol.n_value += ANOFFSET (objfile->section_offsets,
2687 SECT_OFF_DATA (objfile));
2688 /* The addresses in these entries are reported to be
2689 wrong. See the code that reads 'G's for symtabs. */
2690 add_psymbol_to_list (namestring, p - namestring, 1,
2691 VAR_DOMAIN, LOC_STATIC,
2692 &objfile->global_psymbols,
2694 psymtab_language, objfile);
2698 /* When a 'T' entry is defining an anonymous enum, it
2699 may have a name which is the empty string, or a
2700 single space. Since they're not really defining a
2701 symbol, those shouldn't go in the partial symbol
2702 table. We do pick up the elements of such enums at
2703 'check_enum:', below. */
2704 if (p >= namestring + 2
2705 || (p == namestring + 1
2706 && namestring[0] != ' '))
2708 add_psymbol_to_list (namestring, p - namestring, 1,
2709 STRUCT_DOMAIN, LOC_TYPEDEF,
2710 &objfile->static_psymbols,
2712 psymtab_language, objfile);
2715 /* Also a typedef with the same name. */
2716 add_psymbol_to_list (namestring, p - namestring, 1,
2717 VAR_DOMAIN, LOC_TYPEDEF,
2718 &objfile->static_psymbols,
2720 psymtab_language, objfile);
2727 if (p != namestring) /* a name is there, not just :T... */
2729 add_psymbol_to_list (namestring, p - namestring, 1,
2730 VAR_DOMAIN, LOC_TYPEDEF,
2731 &objfile->static_psymbols,
2733 psymtab_language, objfile);
2736 /* If this is an enumerated type, we need to
2737 add all the enum constants to the partial symbol
2738 table. This does not cover enums without names, e.g.
2739 "enum {a, b} c;" in C, but fortunately those are
2740 rare. There is no way for GDB to find those from the
2741 enum type without spending too much time on it. Thus
2742 to solve this problem, the compiler needs to put out the
2743 enum in a nameless type. GCC2 does this. */
2745 /* We are looking for something of the form
2746 <name> ":" ("t" | "T") [<number> "="] "e"
2747 {<constant> ":" <value> ","} ";". */
2749 /* Skip over the colon and the 't' or 'T'. */
2751 /* This type may be given a number. Also, numbers can come
2752 in pairs like (0,26). Skip over it. */
2753 while ((*p >= '0' && *p <= '9')
2754 || *p == '(' || *p == ',' || *p == ')'
2760 /* The aix4 compiler emits extra crud before the
2764 /* Skip over the type (?). */
2768 /* Skip over the colon. */
2772 /* We have found an enumerated type. */
2773 /* According to comments in read_enum_type
2774 a comma could end it instead of a semicolon.
2775 I don't know where that happens.
2777 while (*p && *p != ';' && *p != ',')
2781 /* Check for and handle cretinous dbx symbol name
2783 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2784 p = next_symbol_text (objfile);
2786 /* Point to the character after the name
2787 of the enum constant. */
2788 for (q = p; *q && *q != ':'; q++)
2790 /* Note that the value doesn't matter for
2791 enum constants in psymtabs, just in symtabs. */
2792 add_psymbol_to_list (p, q - p, 1,
2793 VAR_DOMAIN, LOC_CONST,
2794 &objfile->static_psymbols, 0,
2795 0, psymtab_language, objfile);
2796 /* Point past the name. */
2798 /* Skip over the value. */
2799 while (*p && *p != ',')
2801 /* Advance past the comma. */
2809 /* Constant, e.g. from "const" in Pascal. */
2810 add_psymbol_to_list (namestring, p - namestring, 1,
2811 VAR_DOMAIN, LOC_CONST,
2812 &objfile->static_psymbols, symbol.n_value,
2813 0, psymtab_language, objfile);
2819 int name_len = p - namestring;
2820 char *name = xmalloc (name_len + 1);
2822 memcpy (name, namestring, name_len);
2823 name[name_len] = '\0';
2824 function_outside_compilation_unit_complaint (name);
2827 symbol.n_value += ANOFFSET (objfile->section_offsets,
2828 SECT_OFF_TEXT (objfile));
2829 add_psymbol_to_list (namestring, p - namestring, 1,
2830 VAR_DOMAIN, LOC_BLOCK,
2831 &objfile->static_psymbols,
2833 psymtab_language, objfile);
2836 /* Global functions were ignored here, but now they
2837 are put into the global psymtab like one would expect.
2838 They're also in the minimal symbol table. */
2842 int name_len = p - namestring;
2843 char *name = xmalloc (name_len + 1);
2845 memcpy (name, namestring, name_len);
2846 name[name_len] = '\0';
2847 function_outside_compilation_unit_complaint (name);
2851 /* We need only the minimal symbols for these
2852 loader-generated definitions. Keeping the global
2853 symbols leads to "in psymbols but not in symbols"
2855 if (strncmp (namestring, "@FIX", 4) == 0)
2858 symbol.n_value += ANOFFSET (objfile->section_offsets,
2859 SECT_OFF_TEXT (objfile));
2860 add_psymbol_to_list (namestring, p - namestring, 1,
2861 VAR_DOMAIN, LOC_BLOCK,
2862 &objfile->global_psymbols,
2864 psymtab_language, objfile);
2867 /* Two things show up here (hopefully); static symbols of
2868 local scope (static used inside braces) or extensions
2869 of structure symbols. We can ignore both. */
2883 case '#': /* For symbol identification (used in
2888 /* It is a C++ nested symbol. We don't need to record it
2889 (I don't think); if we try to look up foo::bar::baz,
2890 then symbols for the symtab containing foo should get
2891 read in, I think. */
2892 /* Someone says sun cc puts out symbols like
2893 /foo/baz/maclib::/usr/local/bin/maclib,
2894 which would get here with a symbol type of ':'. */
2898 /* Unexpected symbol descriptor. The second and
2899 subsequent stabs of a continued stab can show up
2900 here. The question is whether they ever can mimic
2901 a normal stab--it would be nice if not, since we
2902 certainly don't want to spend the time searching to
2903 the end of every string looking for a
2906 complaint (&symfile_complaints,
2907 _("unknown symbol descriptor `%c'"), p[1]);
2909 /* Ignore it; perhaps it is an extension that we don't
2919 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2920 ssymnum, dependency_list,
2921 dependencies_used, textlow_not_set);
2924 /* Record the toc offset value of this symbol table into objfile
2925 structure. If no XMC_TC0 is found, toc_offset should be zero.
2926 Another place to obtain this information would be file auxiliary
2929 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2932 /* Return the toc offset value for a given objfile. */
2935 xcoff_get_toc_offset (struct objfile *objfile)
2938 return XCOFF_DATA (objfile)->toc_offset;
2942 /* Scan and build partial symbols for a symbol file.
2943 We have been initialized by a call to dbx_symfile_init, which
2944 put all the relevant info into a "struct dbx_symfile_info",
2945 hung off the objfile structure.
2947 SECTION_OFFSETS contains offsets relative to which the symbols in the
2948 various sections are (depending where the sections were actually
2952 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2956 struct cleanup *back_to;
2957 int num_symbols; /* # of symbols */
2958 file_ptr symtab_offset; /* symbol table and */
2959 file_ptr stringtab_offset; /* string table file offsets */
2960 struct coff_symfile_info *info;
2964 info = XCOFF_DATA (objfile);
2965 symfile_bfd = abfd = objfile->obfd;
2966 name = objfile_name (objfile);
2968 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2969 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2970 stringtab_offset = symtab_offset +
2971 num_symbols * coff_data (abfd)->local_symesz;
2973 info->min_lineno_offset = 0;
2974 info->max_lineno_offset = 0;
2975 bfd_map_over_sections (abfd, find_linenos, info);
2977 if (num_symbols > 0)
2979 /* Read the string table. */
2980 init_stringtab (abfd, stringtab_offset, objfile);
2982 /* Read the .debug section, if present. */
2984 struct bfd_section *secp;
2985 bfd_size_type length;
2986 bfd_byte *debugsec = NULL;
2988 secp = bfd_get_section_by_name (abfd, ".debug");
2991 length = bfd_section_size (abfd, secp);
2994 debugsec = obstack_alloc (&objfile->objfile_obstack, length);
2996 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2998 error (_("Error reading .debug section of `%s': %s"),
2999 name, bfd_errmsg (bfd_get_error ()));
3003 info->debugsec = (char *) debugsec;
3007 /* Read the symbols. We keep them in core because we will want to
3008 access them randomly in read_symbol*. */
3009 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
3011 error (_("Error reading symbols from %s: %s"),
3012 name, bfd_errmsg (bfd_get_error ()));
3013 size = coff_data (abfd)->local_symesz * num_symbols;
3014 info->symtbl = obstack_alloc (&objfile->objfile_obstack, size);
3015 info->symtbl_num_syms = num_symbols;
3017 val = bfd_bread (info->symtbl, size, abfd);
3019 perror_with_name (_("reading symbol table"));
3021 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3022 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3023 /* I'm not sure how how good num_symbols is; the rule of thumb in
3024 init_psymbol_list was developed for a.out. On the one hand,
3025 num_symbols includes auxents. On the other hand, it doesn't
3027 init_psymbol_list (objfile, num_symbols);
3029 free_pending_blocks ();
3030 back_to = make_cleanup (really_free_pendings, 0);
3032 init_minimal_symbol_collection ();
3033 make_cleanup_discard_minimal_symbols ();
3035 /* Now that the symbol table data of the executable file are all in core,
3036 process them and define symbols accordingly. */
3038 scan_xcoff_symtab (objfile);
3040 /* Install any minimal symbols that have been collected as the current
3041 minimal symbols for this objfile. */
3043 install_minimal_symbols (objfile);
3045 /* DWARF2 sections. */
3047 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3048 dwarf2_build_psymtabs (objfile);
3050 dwarf2_build_frame_info (objfile);
3052 do_cleanups (back_to);
3056 xcoff_symfile_offsets (struct objfile *objfile,
3057 const struct section_addr_info *addrs)
3059 const char *first_section_name;
3061 default_symfile_offsets (objfile, addrs);
3063 /* Oneof the weird side-effects of default_symfile_offsets is that
3064 it sometimes sets some section indices to zero for sections that,
3065 in fact do not exist. See the body of default_symfile_offsets
3066 for more info on when that happens. Undo that, as this then allows
3067 us to test whether the associated section exists or not, and then
3068 access it quickly (without searching it again). */
3070 if (objfile->num_sections == 0)
3071 return; /* Is that even possible? Better safe than sorry. */
3074 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3076 if (objfile->sect_index_text == 0
3077 && strcmp (first_section_name, ".text") != 0)
3078 objfile->sect_index_text = -1;
3080 if (objfile->sect_index_data == 0
3081 && strcmp (first_section_name, ".data") != 0)
3082 objfile->sect_index_data = -1;
3084 if (objfile->sect_index_bss == 0
3085 && strcmp (first_section_name, ".bss") != 0)
3086 objfile->sect_index_bss = -1;
3088 if (objfile->sect_index_rodata == 0
3089 && strcmp (first_section_name, ".rodata") != 0)
3090 objfile->sect_index_rodata = -1;
3093 /* Register our ability to parse symbols for xcoff BFD files. */
3095 static const struct sym_fns xcoff_sym_fns =
3098 /* It is possible that coff and xcoff should be merged as
3099 they do have fundamental similarities (for example, the extra storage
3100 classes used for stabs could presumably be recognized in any COFF file).
3101 However, in addition to obvious things like all the csect hair, there are
3102 some subtler differences between xcoffread.c and coffread.c, notably
3103 the fact that coffread.c has no need to read in all the symbols, but
3104 xcoffread.c reads all the symbols and does in fact randomly access them
3105 (in C_BSTAT and line number processing). */
3107 xcoff_new_init, /* init anything gbl to entire symtab */
3108 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3109 xcoff_initial_scan, /* read a symbol file into symtab */
3110 NULL, /* sym_read_psymbols */
3111 xcoff_symfile_finish, /* finished with file, cleanup */
3112 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3113 default_symfile_segments, /* Get segment information from a file. */
3114 aix_process_linenos,
3115 default_symfile_relocate, /* Relocate a debug section. */
3116 NULL, /* sym_probe_fns */
3120 /* Same as xcoff_get_n_import_files, but for core files. */
3123 xcoff_get_core_n_import_files (bfd *abfd)
3125 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3127 file_ptr offset = 0;
3131 return -1; /* Not a core file. */
3133 for (offset = 0; offset < bfd_get_section_size (sect);)
3139 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3141 next = bfd_get_32 (abfd, buf);
3143 break; /* This is the last entry. */
3147 /* Return the number of entries, excluding the first one, which is
3148 the path to the executable that produced this core file. */
3149 return n_entries - 1;
3152 /* Return the number of import files (shared libraries) that the given
3153 BFD depends on. Return -1 if this number could not be computed. */
3156 xcoff_get_n_import_files (bfd *abfd)
3158 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3162 /* If the ".loader" section does not exist, the objfile is probably
3163 not an executable. Might be a core file... */
3165 return xcoff_get_core_n_import_files (abfd);
3167 /* The number of entries in the Import Files Table is stored in
3168 field l_nimpid. This field is always at offset 16, and is
3169 always 4 bytes long. Read those 4 bytes. */
3171 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3173 l_nimpid = bfd_get_32 (abfd, buf);
3175 /* By convention, the first entry is the default LIBPATH value
3176 to be used by the system loader, so it does not count towards
3177 the number of import files. */
3178 return l_nimpid - 1;
3181 /* Free the per-objfile xcoff data. */
3184 xcoff_free_info (struct objfile *objfile, void *arg)
3189 /* Provide a prototype to silence -Wmissing-prototypes. */
3190 extern initialize_file_ftype _initialize_xcoffread;
3193 _initialize_xcoffread (void)
3195 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3197 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,