1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2015 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 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data *xcoff_objfile_data_key;
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this
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 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
123 there is any reason not to just use a #define, but might as well
124 ask BFD for the size and store it here, I guess. */
126 static unsigned local_symesz;
128 struct coff_symfile_info
130 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
131 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
133 /* Pointer to the string table. */
136 /* Pointer to debug section. */
139 /* Pointer to the a.out symbol table. */
142 /* Number of symbols in symtbl. */
145 /* Offset in data section to TOC anchor. */
146 CORE_ADDR toc_offset;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 ((struct coff_symfile_info *) objfile_data ((objfile), \
153 xcoff_objfile_data_key))
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
159 { ".dwabrev", NULL },
162 { NULL, NULL }, /* debug_macinfo */
163 { NULL, NULL }, /* debug_macro */
165 { ".dwrnges", NULL },
166 { NULL, NULL }, /* debug_types */
167 { NULL, NULL }, /* debug_addr */
168 { ".dwframe", NULL },
169 { NULL, NULL }, /* eh_frame */
170 { NULL, NULL }, /* gdb_index */
175 bf_notfound_complaint (void)
177 complaint (&symfile_complaints,
178 _("line numbers off, `.bf' symbol not found"));
182 ef_complaint (int arg1)
184 complaint (&symfile_complaints,
185 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
189 eb_complaint (int arg1)
191 complaint (&symfile_complaints,
192 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
195 static void xcoff_initial_scan (struct objfile *, int);
197 static void scan_xcoff_symtab (struct objfile *);
199 static char *xcoff_next_symbol_text (struct objfile *);
201 static void record_include_begin (struct coff_symbol *);
204 enter_line_range (struct subfile *, unsigned, unsigned,
205 CORE_ADDR, CORE_ADDR, unsigned *);
207 static void init_stringtab (bfd *, file_ptr, struct objfile *);
209 static void xcoff_symfile_init (struct objfile *);
211 static void xcoff_new_init (struct objfile *);
213 static void xcoff_symfile_finish (struct objfile *);
215 static char *coff_getfilename (union internal_auxent *, struct objfile *);
217 static void read_symbol (struct internal_syment *, int);
219 static int read_symbol_lineno (int);
221 static CORE_ADDR read_symbol_nvalue (int);
223 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
226 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
229 static void add_stab_to_list (char *, struct pending_stabs **);
232 static int compare_lte (const void *, const void *);
234 static struct linetable *arrange_linetable (struct linetable *);
236 static void record_include_end (struct coff_symbol *);
238 static void process_linenos (CORE_ADDR, CORE_ADDR);
241 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
243 static int secnum_to_section (int, struct objfile *);
244 static asection *secnum_to_bfd_section (int, struct objfile *);
246 struct find_targ_sec_arg
251 struct objfile *objfile;
254 static void find_targ_sec (bfd *, asection *, void *);
257 find_targ_sec (bfd *abfd, asection *sect, void *obj)
259 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
260 struct objfile *objfile = args->objfile;
262 if (sect->target_index == args->targ_index)
264 /* This is the section. Figure out what SECT_OFF_* code it is. */
265 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
266 *args->resultp = SECT_OFF_TEXT (objfile);
267 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
268 *args->resultp = SECT_OFF_DATA (objfile);
270 *args->resultp = gdb_bfd_section_index (abfd, sect);
271 *args->bfd_sect = sect;
275 /* Search all BFD sections for the section whose target_index is
276 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
277 associated index in the objfile's section_offset table is also
280 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
281 is set to the text section's number. */
284 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
285 asection **bfd_sect, int *secnum)
287 struct find_targ_sec_arg args;
289 args.targ_index = n_scnum;
290 args.resultp = secnum;
291 args.bfd_sect = bfd_sect;
292 args.objfile = objfile;
295 *secnum = SECT_OFF_TEXT (objfile);
297 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
300 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
303 secnum_to_section (int n_scnum, struct objfile *objfile)
308 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
312 /* Return the BFD section that N_SCNUM points to. */
315 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
320 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
324 /* add a given stab string into given stab vector. */
329 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
331 if (*stabvector == NULL)
333 *stabvector = (struct pending_stabs *)
334 xmalloc (sizeof (struct pending_stabs) +
335 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
336 (*stabvector)->count = 0;
337 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
339 else if ((*stabvector)->count >= (*stabvector)->length)
341 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
342 *stabvector = (struct pending_stabs *)
343 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
344 (*stabvector)->length * sizeof (char *));
346 (*stabvector)->stab[(*stabvector)->count++] = stabname;
351 /* Linenos are processed on a file-by-file basis.
355 1) xlc (IBM's native c compiler) postpones static function code
356 emission to the end of a compilation unit. This way it can
357 determine if those functions (statics) are needed or not, and
358 can do some garbage collection (I think). This makes line
359 numbers and corresponding addresses unordered, and we end up
360 with a line table like:
377 and that breaks gdb's binary search on line numbers, if the
378 above table is not sorted on line numbers. And that sort
379 should be on function based, since gcc can emit line numbers
382 10 0x100 - for the init/test part of a for stmt.
385 10 0x400 - for the increment part of a for stmt.
387 arrange_linetable() will do this sorting.
389 2) aix symbol table might look like:
391 c_file // beginning of a new file
392 .bi // beginning of include file
393 .ei // end of include file
397 basically, .bi/.ei pairs do not necessarily encapsulate
398 their scope. They need to be recorded, and processed later
399 on when we come the end of the compilation unit.
400 Include table (inclTable) and process_linenos() handle
406 /* compare line table entry addresses. */
409 compare_lte (const void *lte1p, const void *lte2p)
411 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
412 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
414 return lte1->pc - lte2->pc;
417 /* Given a line table with function entries are marked, arrange its
418 functions in ascending order and strip off function entry markers
419 and return it in a newly created table. If the old one is good
420 enough, return the old one. */
421 /* FIXME: I think all this stuff can be replaced by just passing
422 sort_linevec = 1 to end_symtab. */
424 static struct linetable *
425 arrange_linetable (struct linetable *oldLineTb)
427 int ii, jj, newline, /* new line count */
428 function_count; /* # of functions */
430 struct linetable_entry *fentry; /* function entry vector */
431 int fentry_size; /* # of function entries */
432 struct linetable *newLineTb; /* new line table */
435 #define NUM_OF_FUNCTIONS 20
437 fentry_size = NUM_OF_FUNCTIONS;
438 fentry = XNEWVEC (struct linetable_entry, fentry_size);
440 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
442 if (oldLineTb->item[ii].line == 0)
443 { /* Function entry found. */
444 if (function_count >= fentry_size)
445 { /* Make sure you have room. */
447 fentry = (struct linetable_entry *)
449 fentry_size * sizeof (struct linetable_entry));
451 fentry[function_count].line = ii;
452 fentry[function_count].pc = oldLineTb->item[ii].pc;
455 /* If the function was compiled with XLC, we may have to add an
456 extra line entry later. Reserve space for that. */
457 if (ii + 1 < oldLineTb->nitems
458 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
463 if (function_count == 0)
468 else if (function_count > 1)
469 qsort (fentry, function_count,
470 sizeof (struct linetable_entry), compare_lte);
472 /* Allocate a new line table. */
473 newLineTb = (struct linetable *)
475 (sizeof (struct linetable) +
476 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
478 /* If line table does not start with a function beginning, copy up until
482 if (oldLineTb->item[0].line != 0)
484 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
485 newLineTb->item[newline] = oldLineTb->item[newline];
487 /* Now copy function lines one by one. */
489 for (ii = 0; ii < function_count; ++ii)
491 /* If the function was compiled with XLC, we may have to add an
492 extra line to cover the function prologue. */
493 jj = fentry[ii].line;
494 if (jj + 1 < oldLineTb->nitems
495 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
497 newLineTb->item[newline] = oldLineTb->item[jj];
498 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
502 for (jj = fentry[ii].line + 1;
503 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
505 newLineTb->item[newline] = oldLineTb->item[jj];
508 /* The number of items in the line table must include these
509 extra lines which were added in case of XLC compiled functions. */
510 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
514 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
515 following `IncludeChain'. At the end of each symtab (end_symtab),
516 we will determine if we should create additional symtab's to
517 represent if (the include files. */
520 typedef struct _inclTable
522 char *name; /* include filename */
524 /* Offsets to the line table. end points to the last entry which is
525 part of this include file. */
528 struct subfile *subfile;
529 unsigned funStartLine; /* Start line # of its function. */
533 #define INITIAL_INCLUDE_TABLE_LENGTH 20
534 static InclTable *inclTable; /* global include table */
535 static int inclIndx; /* last entry to table */
536 static int inclLength; /* table length */
537 static int inclDepth; /* nested include depth */
539 static void allocate_include_entry (void);
542 record_include_begin (struct coff_symbol *cs)
546 /* In xcoff, we assume include files cannot be nested (not in .c files
547 of course, but in corresponding .s files.). */
549 /* This can happen with old versions of GCC.
550 GCC 2.3.3-930426 does not exhibit this on a test case which
551 a user said produced the message for him. */
552 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
556 allocate_include_entry ();
558 inclTable[inclIndx].name = cs->c_name;
559 inclTable[inclIndx].begin = cs->c_value;
563 record_include_end (struct coff_symbol *cs)
569 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
572 allocate_include_entry ();
574 pTbl = &inclTable[inclIndx];
575 pTbl->end = cs->c_value;
582 allocate_include_entry (void)
584 if (inclTable == NULL)
586 inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
587 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
590 else if (inclIndx >= inclLength)
592 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
593 inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
594 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
595 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
599 /* Global variable to pass the psymtab down to all the routines involved
600 in psymtab to symtab processing. */
601 static struct partial_symtab *this_symtab_psymtab;
603 /* Objfile related to this_symtab_psymtab; set at the same time. */
604 static struct objfile *this_symtab_objfile;
606 /* given the start and end addresses of a compilation unit (or a csect,
607 at times) process its lines and create appropriate line vectors. */
610 process_linenos (CORE_ADDR start, CORE_ADDR end)
614 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
616 /* subfile structure for the main compilation unit. */
617 struct subfile main_subfile;
619 /* In the main source file, any time we see a function entry, we
620 reset this variable to function's absolute starting line number.
621 All the following line numbers in the function are relative to
622 this, and we record absolute line numbers in record_line(). */
624 unsigned int main_source_baseline = 0;
629 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
631 goto return_after_cleanup;
633 memset (&main_subfile, '\0', sizeof (main_subfile));
636 /* All source lines were in the main source file. None in include
639 enter_line_range (&main_subfile, offset, 0, start, end,
640 &main_source_baseline);
644 /* There was source with line numbers in include files. */
647 coff_data (this_symtab_objfile->obfd)->local_linesz;
648 main_source_baseline = 0;
650 for (ii = 0; ii < inclIndx; ++ii)
652 struct subfile *tmpSubfile;
654 /* If there is main file source before include file, enter it. */
655 if (offset < inclTable[ii].begin)
658 (&main_subfile, offset, inclTable[ii].begin - linesz,
659 start, 0, &main_source_baseline);
662 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
664 /* The entry in the include table refers to the main source
665 file. Add the lines to the main subfile. */
667 main_source_baseline = inclTable[ii].funStartLine;
669 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
670 start, 0, &main_source_baseline);
671 inclTable[ii].subfile = &main_subfile;
675 /* Have a new subfile for the include file. */
677 tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile);
679 memset (tmpSubfile, '\0', sizeof (struct subfile));
680 firstLine = &(inclTable[ii].funStartLine);
682 /* Enter include file's lines now. */
683 enter_line_range (tmpSubfile, inclTable[ii].begin,
684 inclTable[ii].end, start, 0, firstLine);
687 if (offset <= inclTable[ii].end)
688 offset = inclTable[ii].end + linesz;
691 /* All the include files' line have been processed at this point. Now,
692 enter remaining lines of the main file, if any left. */
693 if (offset < max_offset + 1 - linesz)
695 enter_line_range (&main_subfile, offset, 0, start, end,
696 &main_source_baseline);
700 /* Process main file's line numbers. */
701 if (main_subfile.line_vector)
703 struct linetable *lineTb, *lv;
705 lv = main_subfile.line_vector;
707 /* Line numbers are not necessarily ordered. xlc compilation will
708 put static function to the end. */
710 lineTb = arrange_linetable (lv);
713 current_subfile->line_vector = (struct linetable *)
714 xrealloc (lv, (sizeof (struct linetable)
715 + lv->nitems * sizeof (struct linetable_entry)));
720 current_subfile->line_vector = lineTb;
723 current_subfile->line_vector_length =
724 current_subfile->line_vector->nitems;
727 /* Now, process included files' line numbers. */
729 for (ii = 0; ii < inclIndx; ++ii)
731 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
732 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
735 struct linetable *lineTb, *lv;
737 lv = (inclTable[ii].subfile)->line_vector;
739 /* Line numbers are not necessarily ordered. xlc compilation will
740 put static function to the end. */
742 lineTb = arrange_linetable (lv);
746 /* For the same include file, we might want to have more than one
747 subfile. This happens if we have something like:
755 while foo.h including code in it. (stupid but possible)
756 Since start_subfile() looks at the name and uses an
757 existing one if finds, we need to provide a fake name and
761 start_subfile (inclTable[ii].name);
764 /* Pick a fake name that will produce the same results as this
765 one when passed to deduce_language_from_filename. Kludge on
767 char *fakename = strrchr (inclTable[ii].name, '.');
769 if (fakename == NULL)
771 start_subfile (fakename);
772 xfree (current_subfile->name);
774 current_subfile->name = xstrdup (inclTable[ii].name);
779 current_subfile->line_vector =
780 (struct linetable *) xrealloc
781 (lv, (sizeof (struct linetable)
782 + lv->nitems * sizeof (struct linetable_entry)));
788 current_subfile->line_vector = lineTb;
791 current_subfile->line_vector_length =
792 current_subfile->line_vector->nitems;
793 start_subfile (pop_subfile ());
797 return_after_cleanup:
799 /* We don't want to keep alloc/free'ing the global include file table. */
804 aix_process_linenos (struct objfile *objfile)
806 /* There is no linenos to read if there are only dwarf info. */
807 if (this_symtab_psymtab == NULL)
810 /* Process line numbers and enter them into line vector. */
811 process_linenos (last_source_start_addr, cur_src_end_addr);
815 /* Enter a given range of lines into the line vector.
816 can be called in the following two ways:
817 enter_line_range (subfile, beginoffset, endoffset,
818 startaddr, 0, firstLine) or
819 enter_line_range (subfile, beginoffset, 0,
820 startaddr, endaddr, firstLine)
822 endoffset points to the last line table entry that we should pay
826 enter_line_range (struct subfile *subfile, unsigned beginoffset,
827 unsigned endoffset, /* offsets to line table */
828 CORE_ADDR startaddr, /* offsets to line table */
829 CORE_ADDR endaddr, unsigned *firstLine)
831 struct objfile *objfile = this_symtab_objfile;
832 struct gdbarch *gdbarch = get_objfile_arch (objfile);
833 unsigned int curoffset;
836 struct internal_lineno int_lnno;
837 unsigned int limit_offset;
841 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
843 curoffset = beginoffset;
844 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
848 if (endoffset >= limit_offset)
850 complaint (&symfile_complaints,
851 _("Bad line table offset in C_EINCL directive"));
854 limit_offset = endoffset;
859 abfd = objfile->obfd;
860 linesz = coff_data (abfd)->local_linesz;
861 ext_lnno = alloca (linesz);
863 while (curoffset <= limit_offset)
865 bfd_seek (abfd, curoffset, SEEK_SET);
866 bfd_bread (ext_lnno, linesz, abfd);
867 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
869 /* Find the address this line represents. */
870 addr = (int_lnno.l_lnno
871 ? int_lnno.l_addr.l_paddr
872 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
873 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
875 if (addr < startaddr || (endaddr && addr >= endaddr))
878 if (int_lnno.l_lnno == 0)
880 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
881 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
885 record_line (subfile, *firstLine + int_lnno.l_lnno,
886 gdbarch_addr_bits_remove (gdbarch, addr));
892 /* Save the vital information for use when closing off the current file.
893 NAME is the file name the symbols came from, START_ADDR is the first
894 text address for the file, and SIZE is the number of bytes of text. */
896 #define complete_symtab(name, start_addr) { \
897 set_last_source_file (name); \
898 last_source_start_addr = start_addr; \
902 /* Refill the symbol table input buffer
903 and set the variables that control fetching entries from it.
904 Reports an error if no data available.
905 This function can read past the end of the symbol table
906 (into the string table) but this does no harm. */
908 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
910 Creation of all new minimal symbols should go through this function
911 rather than calling the various prim_record_[...] functions in order
912 to make sure that all symbol addresses get properly relocated.
916 NAME - the symbol's name (but if NAME starts with a period, that
917 leading period is discarded).
918 ADDRESS - the symbol's address, prior to relocation. This function
919 relocates the address before recording the minimal symbol.
920 MS_TYPE - the symbol's type.
921 N_SCNUM - the symbol's XCOFF section number.
922 OBJFILE - the objfile associated with the minimal symbol. */
925 record_minimal_symbol (const char *name, CORE_ADDR address,
926 enum minimal_symbol_type ms_type,
928 struct objfile *objfile)
930 int section = secnum_to_section (n_scnum, objfile);
935 prim_record_minimal_symbol_and_info (name, address, ms_type,
936 secnum_to_section (n_scnum, objfile),
940 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
941 nested. At any given time, a symbol can only be in one static block.
942 This is the base address of current static block, zero if non exists. */
944 static int static_block_base = 0;
946 /* Section number for the current static block. */
948 static int static_block_section = -1;
950 /* true if space for symbol name has been allocated. */
952 static int symname_alloced = 0;
954 /* Next symbol to read. Pointer into raw seething symbol table. */
956 static char *raw_symbol;
958 /* This is the function which stabsread.c calls to get symbol
962 xcoff_next_symbol_text (struct objfile *objfile)
964 struct internal_syment symbol;
967 /* FIXME: is this the same as the passed arg? */
968 if (this_symtab_objfile)
969 objfile = this_symtab_objfile;
971 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
974 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
976 /* Return something which points to '\0' and hope the symbol reading
977 code does something reasonable. */
980 else if (symbol.n_sclass & 0x80)
982 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
983 raw_symbol += coff_data (objfile->obfd)->local_symesz;
988 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
990 /* Return something which points to '\0' and hope the symbol reading
991 code does something reasonable. */
997 /* Read symbols for a given partial symbol table. */
1000 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1002 bfd *abfd = objfile->obfd;
1003 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1004 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1005 char *strtbl = xcoff->strtbl;
1006 char *debugsec = xcoff->debugsec;
1007 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1009 struct internal_syment symbol[1];
1010 union internal_auxent main_aux;
1011 struct coff_symbol cs[1];
1012 CORE_ADDR file_start_addr = 0;
1013 CORE_ADDR file_end_addr = 0;
1015 int next_file_symnum = -1;
1016 unsigned int max_symnum;
1017 int just_started = 1;
1019 CORE_ADDR fcn_start_addr = 0;
1021 struct coff_symbol fcn_stab_saved = { 0 };
1023 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1024 union internal_auxent fcn_aux_saved = main_aux;
1025 struct context_stack *newobj;
1027 char *filestring = " _start_ "; /* Name of the current file. */
1029 const char *last_csect_name; /* Last seen csect's name. */
1031 this_symtab_psymtab = pst;
1032 this_symtab_objfile = objfile;
1034 /* Get the appropriate COFF "constants" related to the file we're
1036 local_symesz = coff_data (abfd)->local_symesz;
1038 set_last_source_file (NULL);
1039 last_csect_name = 0;
1042 start_symtab (objfile, filestring, (char *) NULL, file_start_addr);
1043 record_debugformat (debugfmt);
1044 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1046 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1047 first_object_file_end = 0;
1049 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1051 while (symnum < max_symnum)
1053 QUIT; /* make this command interruptable. */
1055 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1056 /* read one symbol into `cs' structure. After processing the
1057 whole symbol table, only string table will be kept in memory,
1058 symbol table and debug section of xcoff will be freed. Thus
1059 we can mark symbols with names in string table as
1064 /* Swap and align the symbol into a reasonable C structure. */
1065 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1067 cs->c_symnum = symnum;
1068 cs->c_naux = symbol->n_numaux;
1069 if (symbol->n_zeroes)
1071 symname_alloced = 0;
1072 /* We must use the original, unswapped, name here so the name field
1073 pointed to by cs->c_name will persist throughout xcoffread. If
1074 we use the new field, it gets overwritten for each symbol. */
1075 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1076 /* If it's exactly E_SYMNMLEN characters long it isn't
1078 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1082 p = (char *) obstack_alloc (&objfile->objfile_obstack,
1084 strncpy (p, cs->c_name, E_SYMNMLEN);
1085 p[E_SYMNMLEN] = '\0';
1087 symname_alloced = 1;
1090 else if (symbol->n_sclass & 0x80)
1092 cs->c_name = debugsec + symbol->n_offset;
1093 symname_alloced = 0;
1097 /* in string table */
1098 cs->c_name = strtbl + (int) symbol->n_offset;
1099 symname_alloced = 1;
1101 cs->c_value = symbol->n_value;
1102 cs->c_sclass = symbol->n_sclass;
1103 cs->c_secnum = symbol->n_scnum;
1104 cs->c_type = (unsigned) symbol->n_type;
1106 raw_symbol += local_symesz;
1109 /* Save addr of first aux entry. */
1110 raw_auxptr = raw_symbol;
1112 /* Skip all the auxents associated with this symbol. */
1113 for (ii = symbol->n_numaux; ii; --ii)
1115 raw_symbol += coff_data (abfd)->local_auxesz;
1120 /* if symbol name starts with ".$" or "$", ignore it. */
1121 if (cs->c_name[0] == '$'
1122 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1125 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1127 if (get_last_source_file ())
1129 pst->compunit_symtab = end_symtab (cur_src_end_addr,
1130 SECT_OFF_TEXT (objfile));
1135 start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0);
1136 record_debugformat (debugfmt);
1137 cur_src_end_addr = first_object_file_end;
1138 /* Done with all files, everything from here on is globals. */
1141 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1144 /* Dealing with a symbol with a csect entry. */
1146 #define CSECT(PP) ((PP)->x_csect)
1147 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1148 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1149 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1150 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1152 /* Convert the auxent to something we can access. */
1153 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1154 0, cs->c_naux, &main_aux);
1156 switch (CSECT_SMTYP (&main_aux))
1160 /* Ignore all external references. */
1164 /* A section description. */
1166 switch (CSECT_SCLAS (&main_aux))
1172 /* A program csect is seen. We have to allocate one
1173 symbol table for each program csect. Normally gdb
1174 prefers one symtab for each source file. In case
1175 of AIX, one source file might include more than one
1176 [PR] csect, and they don't have to be adjacent in
1177 terms of the space they occupy in memory. Thus, one
1178 single source file might get fragmented in the
1179 memory and gdb's file start and end address
1180 approach does not work! GCC (and I think xlc) seem
1181 to put all the code in the unnamed program csect. */
1183 if (last_csect_name)
1185 complete_symtab (filestring, file_start_addr);
1186 cur_src_end_addr = file_end_addr;
1187 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1190 /* Give all csects for this source file the same
1192 start_symtab (objfile, filestring, NULL,
1194 record_debugformat (debugfmt);
1197 /* If this is the very first csect seen,
1198 basically `__start'. */
1201 first_object_file_end
1202 = cs->c_value + CSECT_LEN (&main_aux);
1207 cs->c_value + ANOFFSET (objfile->section_offsets,
1208 SECT_OFF_TEXT (objfile));
1209 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1211 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1212 last_csect_name = cs->c_name;
1216 /* All other symbols are put into the minimal symbol
1229 /* Ignore the symbol. */
1237 switch (CSECT_SCLAS (&main_aux))
1240 /* a function entry point. */
1241 function_entry_point:
1243 fcn_start_addr = cs->c_value;
1245 /* save the function header info, which will be used
1246 when `.bf' is seen. */
1248 fcn_aux_saved = main_aux;
1252 /* shared library function trampoline code entry point. */
1256 /* The symbols often have the same names as debug symbols for
1257 functions, and confuse lookup_symbol. */
1261 /* xlc puts each variable in a separate csect, so we get
1262 an XTY_SD for each variable. But gcc puts several
1263 variables in a csect, so that each variable only gets
1264 an XTY_LD. This will typically be XMC_RW; I suspect
1265 XMC_RO and XMC_BS might be possible too.
1266 These variables are put in the minimal symbol table
1273 /* Common symbols are put into the minimal symbol table only. */
1281 /* If explicitly specified as a function, treat is as one. This check
1282 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1283 after the above CSECT check. */
1284 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1286 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1287 0, cs->c_naux, &main_aux);
1288 goto function_entry_point;
1291 switch (cs->c_sclass)
1295 /* c_value field contains symnum of next .file entry in table
1296 or symnum of first global after last .file. */
1298 next_file_symnum = cs->c_value;
1300 /* Complete symbol table for last object file containing
1301 debugging information. */
1303 /* Whether or not there was a csect in the previous file, we
1304 have to call `end_stabs' and `start_stabs' to reset
1305 type_vector, line_vector, etc. structures. */
1307 complete_symtab (filestring, file_start_addr);
1308 cur_src_end_addr = file_end_addr;
1309 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1312 /* XCOFF, according to the AIX 3.2 documentation, puts the
1313 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1314 do things the standard COFF way and put it in the auxent.
1315 We use the auxent if the symbol is ".file" and an auxent
1316 exists, otherwise use the symbol itself. Simple
1318 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1320 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1321 0, cs->c_naux, &main_aux);
1322 filestring = coff_getfilename (&main_aux, objfile);
1325 filestring = cs->c_name;
1328 start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0);
1329 record_debugformat (debugfmt);
1330 last_csect_name = 0;
1332 /* reset file start and end addresses. A compilation unit
1333 with no text (only data) should have zero file
1335 file_start_addr = file_end_addr = 0;
1339 fcn_stab_saved = *cs;
1343 if (strcmp (cs->c_name, ".bf") == 0)
1345 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1346 SECT_OFF_TEXT (objfile));
1348 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1349 0, cs->c_naux, &main_aux);
1351 within_function = 1;
1353 newobj = push_context (0, fcn_start_addr + off);
1355 newobj->name = define_symbol
1356 (fcn_cs_saved.c_value + off,
1357 fcn_stab_saved.c_name, 0, 0, objfile);
1358 if (newobj->name != NULL)
1359 SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
1361 else if (strcmp (cs->c_name, ".ef") == 0)
1363 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1364 0, cs->c_naux, &main_aux);
1366 /* The value of .ef is the address of epilogue code;
1367 not useful for gdb. */
1368 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1369 contains number of lines to '}' */
1371 if (context_stack_depth <= 0)
1372 { /* We attempted to pop an empty context stack. */
1373 ef_complaint (cs->c_symnum);
1374 within_function = 0;
1377 newobj = pop_context ();
1378 /* Stack must be empty now. */
1379 if (context_stack_depth > 0 || newobj == NULL)
1381 ef_complaint (cs->c_symnum);
1382 within_function = 0;
1386 finish_block (newobj->name, &local_symbols, newobj->old_blocks,
1387 NULL, newobj->start_addr,
1388 (fcn_cs_saved.c_value
1389 + fcn_aux_saved.x_sym.x_misc.x_fsize
1390 + ANOFFSET (objfile->section_offsets,
1391 SECT_OFF_TEXT (objfile))));
1392 within_function = 0;
1397 /* Begin static block. */
1399 struct internal_syment symbol;
1401 read_symbol (&symbol, cs->c_value);
1402 static_block_base = symbol.n_value;
1403 static_block_section =
1404 secnum_to_section (symbol.n_scnum, objfile);
1409 /* End of static block. */
1410 static_block_base = 0;
1411 static_block_section = -1;
1422 complaint (&symfile_complaints,
1423 _("Unrecognized storage class %d."),
1438 /* beginning of include file */
1439 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1440 order. Thus, when wee see them, we might not know enough info
1441 to process them. Thus, we'll be saving them into a table
1442 (inclTable) and postpone their processing. */
1444 record_include_begin (cs);
1448 /* End of include file. */
1449 /* See the comment after case C_BINCL. */
1450 record_include_end (cs);
1454 if (strcmp (cs->c_name, ".bb") == 0)
1457 newobj = push_context (depth,
1459 + ANOFFSET (objfile->section_offsets,
1460 SECT_OFF_TEXT (objfile))));
1462 else if (strcmp (cs->c_name, ".eb") == 0)
1464 if (context_stack_depth <= 0)
1465 { /* We attempted to pop an empty context stack. */
1466 eb_complaint (cs->c_symnum);
1469 newobj = pop_context ();
1470 if (depth-- != newobj->depth)
1472 eb_complaint (cs->c_symnum);
1475 if (local_symbols && context_stack_depth > 0)
1477 /* Make a block for the local symbols within. */
1478 finish_block (newobj->name, &local_symbols,
1479 newobj->old_blocks, NULL,
1482 + ANOFFSET (objfile->section_offsets,
1483 SECT_OFF_TEXT (objfile))));
1485 local_symbols = newobj->locals;
1490 process_xcoff_symbol (cs, objfile);
1495 if (get_last_source_file ())
1497 struct compunit_symtab *cust;
1499 complete_symtab (filestring, file_start_addr);
1500 cur_src_end_addr = file_end_addr;
1501 cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1502 /* When reading symbols for the last C_FILE of the objfile, try
1503 to make sure that we set pst->compunit_symtab to the symtab for the
1504 file, not to the _globals_ symtab. I'm not sure whether this
1505 actually works right or when/if it comes up. */
1506 if (pst->compunit_symtab == NULL)
1507 pst->compunit_symtab = cust;
1512 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1513 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1514 *(SYMBOL2) = *(SYMBOL1);
1517 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1518 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1519 (NAME), strlen (NAME)))
1522 /* process one xcoff symbol. */
1524 static struct symbol *
1525 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1527 struct symbol onesymbol;
1528 struct symbol *sym = &onesymbol;
1529 struct symbol *sym2 = NULL;
1535 if (cs->c_secnum < 0)
1537 /* The value is a register number, offset within a frame, etc.,
1538 and does not get relocated. */
1544 sec = secnum_to_section (cs->c_secnum, objfile);
1545 off = ANOFFSET (objfile->section_offsets, sec);
1552 initialize_objfile_symbol (sym);
1554 /* default assumptions */
1555 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1556 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1557 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1559 if (ISFCN (cs->c_type))
1561 /* At this point, we don't know the type of the function. This
1562 will be patched with the type from its stab entry later on in
1563 patch_block_stabs (), unless the file was compiled without -g. */
1565 SYMBOL_SET_LINKAGE_NAME (sym, ((const char *)
1566 SYMNAME_ALLOC (name, symname_alloced)));
1567 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1569 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1570 SYMBOL_DUP (sym, sym2);
1572 if (cs->c_sclass == C_EXT)
1573 add_symbol_to_list (sym2, &global_symbols);
1574 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1575 add_symbol_to_list (sym2, &file_symbols);
1579 /* In case we can't figure out the type, provide default. */
1580 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1582 switch (cs->c_sclass)
1585 /* The values of functions and global symbols are now resolved
1586 via the global_sym_chain in stabsread.c. */
1588 if (fcn_cs_saved.c_sclass == C_EXT)
1589 add_stab_to_list (name, &global_stabs);
1591 add_stab_to_list (name, &file_stabs);
1595 add_stab_to_list (name, &global_stabs);
1600 common_block_start (cs->c_name, objfile);
1604 common_block_end (objfile);
1608 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1621 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1624 SYMBOL_SECTION (sym) = sec;
1631 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1632 all statics and we need to distinguish file-scope versus
1633 function-scope using within_function. We do this by
1634 changing the string we pass to define_symbol to use 'S'
1635 where we need to, which is not necessarily super-clean,
1636 but seems workable enough. */
1641 pp = strchr (name, ':');
1646 if (*pp == 'V' && !within_function)
1648 sym = define_symbol ((cs->c_value
1649 + ANOFFSET (objfile->section_offsets,
1650 static_block_section)),
1651 cs->c_name, 0, 0, objfile);
1654 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1655 SYMBOL_SECTION (sym) = static_block_section;
1664 /* Extract the file name from the aux entry of a C_FILE symbol.
1665 Result is in static storage and is only good for temporary use. */
1668 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1670 static char buffer[BUFSIZ];
1672 if (aux_entry->x_file.x_n.x_zeroes == 0)
1673 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1674 + aux_entry->x_file.x_n.x_offset));
1677 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1678 buffer[FILNMLEN] = '\0';
1683 /* Set *SYMBOL to symbol number symno in symtbl. */
1685 read_symbol (struct internal_syment *symbol, int symno)
1687 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1688 int nsyms = xcoff->symtbl_num_syms;
1689 char *stbl = xcoff->symtbl;
1691 if (symno < 0 || symno >= nsyms)
1693 complaint (&symfile_complaints, _("Invalid symbol offset"));
1694 symbol->n_value = 0;
1695 symbol->n_scnum = -1;
1698 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1699 stbl + (symno * local_symesz),
1703 /* Get value corresponding to symbol number symno in symtbl. */
1706 read_symbol_nvalue (int symno)
1708 struct internal_syment symbol[1];
1710 read_symbol (symbol, symno);
1711 return symbol->n_value;
1715 /* Find the address of the function corresponding to symno, where
1716 symno is the symbol pointed to by the linetable. */
1719 read_symbol_lineno (int symno)
1721 struct objfile *objfile = this_symtab_objfile;
1722 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1724 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1725 int nsyms = info->symtbl_num_syms;
1726 char *stbl = info->symtbl;
1727 char *strtbl = info->strtbl;
1729 struct internal_syment symbol[1];
1730 union internal_auxent main_aux[1];
1734 bf_notfound_complaint ();
1738 /* Note that just searching for a short distance (e.g. 50 symbols)
1739 is not enough, at least in the following case.
1742 [many .stabx entries]
1743 [a few functions, referring to foo]
1747 What happens here is that the assembler moves the .stabx entries
1748 to right before the ".bf" for foo, but the symbol for "foo" is before
1749 all the stabx entries. See PR gdb/2222. */
1751 /* Maintaining a table of .bf entries might be preferable to this search.
1752 If I understand things correctly it would need to be done only for
1753 the duration of a single psymtab to symtab conversion. */
1754 while (symno < nsyms)
1756 bfd_coff_swap_sym_in (symfile_bfd,
1757 stbl + (symno * local_symesz), symbol);
1758 if (symbol->n_sclass == C_FCN)
1760 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1762 if (strcmp (name, ".bf") == 0)
1765 symno += symbol->n_numaux + 1;
1768 bf_notfound_complaint ();
1772 /* Take aux entry and return its lineno. */
1774 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1775 symbol->n_type, symbol->n_sclass,
1776 0, symbol->n_numaux, main_aux);
1778 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1781 /* Support for line number handling. */
1783 /* This function is called for every section; it finds the outer limits
1784 * of the line table (minimum and maximum file offset) so that the
1785 * mainline code can read the whole thing for efficiency.
1788 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1790 struct coff_symfile_info *info;
1792 file_ptr offset, maxoff;
1794 count = asect->lineno_count;
1796 if (strcmp (asect->name, ".text") != 0 || count == 0)
1799 size = count * coff_data (abfd)->local_linesz;
1800 info = (struct coff_symfile_info *) vpinfo;
1801 offset = asect->line_filepos;
1802 maxoff = offset + size;
1804 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1805 info->min_lineno_offset = offset;
1807 if (maxoff > info->max_lineno_offset)
1808 info->max_lineno_offset = maxoff;
1812 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1814 struct cleanup *old_chain;
1823 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1828 /* Read in all partial symtabs on which this one is dependent. */
1829 for (i = 0; i < pst->number_of_dependencies; i++)
1830 if (!pst->dependencies[i]->readin)
1832 /* Inform about additional files that need to be read in. */
1835 fputs_filtered (" ", gdb_stdout);
1837 fputs_filtered ("and ", gdb_stdout);
1839 printf_filtered ("%s...", pst->dependencies[i]->filename);
1840 wrap_here (""); /* Flush output */
1841 gdb_flush (gdb_stdout);
1843 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1846 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1848 /* Init stuff necessary for reading in symbols. */
1851 old_chain = make_cleanup (really_free_pendings, 0);
1853 read_xcoff_symtab (objfile, pst);
1855 do_cleanups (old_chain);
1861 /* Read in all of the symbols for a given psymtab for real.
1862 Be verbose about it if the user wants that. SELF is not NULL. */
1865 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1870 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1875 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1876 || self->number_of_dependencies)
1878 /* Print the message now, before reading the string table,
1879 to avoid disconcerting pauses. */
1882 printf_filtered ("Reading in symbols for %s...", self->filename);
1883 gdb_flush (gdb_stdout);
1886 next_symbol_text_func = xcoff_next_symbol_text;
1888 xcoff_psymtab_to_symtab_1 (objfile, self);
1890 /* Match with global symbols. This only needs to be done once,
1891 after all of the symtabs and dependencies have been read in. */
1892 scan_file_globals (objfile);
1894 /* Finish up the debug error message. */
1896 printf_filtered ("done.\n");
1901 xcoff_new_init (struct objfile *objfile)
1903 stabsread_new_init ();
1904 buildsym_new_init ();
1907 /* Do initialization in preparation for reading symbols from OBJFILE.
1909 We will only be called if this is an XCOFF or XCOFF-like file.
1910 BFD handles figuring out the format of the file, and code in symfile.c
1911 uses BFD's determination to vector to us. */
1914 xcoff_symfile_init (struct objfile *objfile)
1916 struct coff_symfile_info *xcoff;
1918 /* Allocate struct to keep track of the symfile. */
1919 xcoff = XNEW (struct coff_symfile_info);
1920 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1922 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1923 find this causes a significant slowdown in gdb then we could
1924 set it in the debug symbol readers only when necessary. */
1925 objfile->flags |= OBJF_REORDERED;
1928 /* Perform any local cleanups required when we are done with a particular
1929 objfile. I.E, we are in the process of discarding all symbol information
1930 for an objfile, freeing up all memory held for it, and unlinking the
1931 objfile struct from the global list of known objfiles. */
1934 xcoff_symfile_finish (struct objfile *objfile)
1936 /* Start with a fresh include table for the next objfile. */
1942 inclIndx = inclLength = inclDepth = 0;
1944 dwarf2_free_objfile (objfile);
1949 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1953 unsigned char lengthbuf[4];
1955 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1957 xcoff->strtbl = NULL;
1959 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1960 error (_("cannot seek to string table in %s: %s"),
1961 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1963 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1964 length = bfd_h_get_32 (abfd, lengthbuf);
1966 /* If no string table is needed, then the file may end immediately
1967 after the symbols. Just return with `strtbl' set to NULL. */
1969 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1972 /* Allocate string table from objfile_obstack. We will need this table
1973 as long as we have its symbol table around. */
1975 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1976 xcoff->strtbl = strtbl;
1978 /* Copy length buffer, the first byte is usually zero and is
1979 used for stabs with a name length of zero. */
1980 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1981 if (length == sizeof lengthbuf)
1984 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1986 if (val != length - sizeof lengthbuf)
1987 error (_("cannot read string table from %s: %s"),
1988 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1989 if (strtbl[length - 1] != '\0')
1990 error (_("bad symbol file: string table "
1991 "does not end with null character"));
1996 /* If we have not yet seen a function for this psymtab, this is 0. If we
1997 have seen one, it is the offset in the line numbers of the line numbers
1999 static unsigned int first_fun_line_offset;
2001 /* Allocate and partially fill a partial symtab. It will be
2002 completely filled at the end of the symbol list.
2004 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2005 is the address relative to which its symbols are (incremental) or 0
2008 static struct partial_symtab *
2009 xcoff_start_psymtab (struct objfile *objfile,
2010 const char *filename, int first_symnum,
2011 struct partial_symbol **global_syms,
2012 struct partial_symbol **static_syms)
2014 struct partial_symtab *result =
2015 start_psymtab_common (objfile,
2017 /* We fill in textlow later. */
2019 global_syms, static_syms);
2021 result->read_symtab_private =
2022 XOBNEW (&objfile->objfile_obstack, struct symloc);
2023 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2024 result->read_symtab = xcoff_read_symtab;
2026 /* Deduce the source language from the filename for this psymtab. */
2027 psymtab_language = deduce_language_from_filename (filename);
2032 /* Close off the current usage of PST.
2033 Returns PST, or NULL if the partial symtab was empty and thrown away.
2035 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2037 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2038 are the information for includes and dependencies. */
2040 static struct partial_symtab *
2041 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2042 const char **include_list, int num_includes,
2043 int capping_symbol_number,
2044 struct partial_symtab **dependency_list,
2045 int number_dependencies, int textlow_not_set)
2049 if (capping_symbol_number != -1)
2050 ((struct symloc *) pst->read_symtab_private)->numsyms =
2051 capping_symbol_number
2052 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2053 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2054 first_fun_line_offset;
2055 first_fun_line_offset = 0;
2057 end_psymtab_common (objfile, pst);
2059 pst->number_of_dependencies = number_dependencies;
2060 if (number_dependencies)
2062 pst->dependencies = XOBNEWVEC (&objfile->objfile_obstack,
2063 struct partial_symtab *,
2064 number_dependencies);
2065 memcpy (pst->dependencies, dependency_list,
2066 number_dependencies * sizeof (struct partial_symtab *));
2069 pst->dependencies = 0;
2071 for (i = 0; i < num_includes; i++)
2073 struct partial_symtab *subpst =
2074 allocate_psymtab (include_list[i], objfile);
2076 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2077 sizeof (struct symloc));
2078 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2079 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2080 subpst->textlow = 0;
2081 subpst->texthigh = 0;
2083 /* We could save slight bits of space by only making one of these,
2084 shared by the entire set of include files. FIXME-someday. */
2085 subpst->dependencies =
2086 XOBNEW (&objfile->objfile_obstack, struct partial_symtab *);
2087 subpst->dependencies[0] = pst;
2088 subpst->number_of_dependencies = 1;
2090 subpst->globals_offset =
2091 subpst->n_global_syms =
2092 subpst->statics_offset =
2093 subpst->n_static_syms = 0;
2096 subpst->compunit_symtab = NULL;
2097 subpst->read_symtab = pst->read_symtab;
2100 if (num_includes == 0
2101 && number_dependencies == 0
2102 && pst->n_global_syms == 0
2103 && pst->n_static_syms == 0)
2105 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2106 it is on the obstack, but we can forget to chain it on the list. */
2107 /* Empty psymtabs happen as a result of header files which don't have
2108 any symbols in them. There can be a lot of them. */
2110 discard_psymtab (objfile, pst);
2112 /* Indicate that psymtab was thrown away. */
2118 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2119 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2120 the symbol and its auxents. */
2123 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2124 const char **name, char **raw, unsigned int *symnump,
2125 struct objfile *objfile)
2127 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2128 if (symbol->n_zeroes)
2130 /* If it's exactly E_SYMNMLEN characters long it isn't
2132 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2134 /* FIXME: wastes memory for symbols which we don't end up putting
2135 into the minimal symbols. */
2138 p = (char *) obstack_alloc (&objfile->objfile_obstack,
2140 strncpy (p, symbol->n_name, E_SYMNMLEN);
2141 p[E_SYMNMLEN] = '\0';
2145 /* Point to the unswapped name as that persists as long as the
2147 *name = ((struct external_syment *) *raw)->e.e_name;
2149 else if (symbol->n_sclass & 0x80)
2151 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2155 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2158 *raw += coff_data (objfile->obfd)->local_symesz;
2159 if (symbol->n_numaux > 0)
2161 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2162 symbol->n_sclass, 0, symbol->n_numaux, aux);
2164 *symnump += symbol->n_numaux;
2165 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2170 function_outside_compilation_unit_complaint (const char *arg1)
2172 complaint (&symfile_complaints,
2173 _("function `%s' appears to be defined "
2174 "outside of all compilation units"),
2179 scan_xcoff_symtab (struct objfile *objfile)
2181 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2182 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2183 const char *filestring = NULL;
2185 const char *namestring;
2186 int past_first_source_file = 0;
2191 /* Current partial symtab */
2192 struct partial_symtab *pst;
2194 /* List of current psymtab's include files. */
2195 const char **psymtab_include_list;
2196 int includes_allocated;
2199 /* Index within current psymtab dependency list. */
2200 struct partial_symtab **dependency_list;
2201 int dependencies_used, dependencies_allocated;
2204 struct internal_syment symbol;
2205 union internal_auxent main_aux[5];
2206 unsigned int ssymnum;
2208 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2209 CORE_ADDR last_csect_val = 0;
2210 int last_csect_sec = 0;
2211 int misc_func_recorded = 0; /* true if any misc. function. */
2212 int textlow_not_set = 1;
2214 pst = (struct partial_symtab *) 0;
2216 includes_allocated = 30;
2218 psymtab_include_list = (const char **) alloca (includes_allocated *
2219 sizeof (const char *));
2221 dependencies_allocated = 30;
2222 dependencies_used = 0;
2224 (struct partial_symtab **) alloca (dependencies_allocated *
2225 sizeof (struct partial_symtab *));
2227 set_last_source_file (NULL);
2229 abfd = objfile->obfd;
2230 next_symbol_text_func = xcoff_next_symbol_text;
2232 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2233 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2235 while (ssymnum < nsyms)
2241 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2242 sclass = symbol.n_sclass;
2249 /* The CSECT auxent--always the last auxent. */
2250 union internal_auxent csect_aux;
2251 unsigned int symnum_before = ssymnum;
2253 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2255 if (symbol.n_numaux > 1)
2257 bfd_coff_swap_aux_in
2259 sraw_symbol - coff_data (abfd)->local_symesz,
2262 symbol.n_numaux - 1,
2267 csect_aux = main_aux[0];
2269 /* If symbol name starts with ".$" or "$", ignore it. */
2270 if (namestring[0] == '$'
2271 || (namestring[0] == '.' && namestring[1] == '$'))
2274 switch (csect_aux.x_csect.x_smtyp & 0x7)
2277 switch (csect_aux.x_csect.x_smclas)
2280 if (last_csect_name)
2282 /* If no misc. function recorded in the last
2283 seen csect, enter it as a function. This
2284 will take care of functions like strcmp()
2287 if (!misc_func_recorded)
2289 record_minimal_symbol
2290 (last_csect_name, last_csect_val,
2291 mst_text, last_csect_sec, objfile);
2292 misc_func_recorded = 1;
2297 /* We have to allocate one psymtab for
2298 each program csect, because their text
2299 sections need not be adjacent. */
2301 (objfile, pst, psymtab_include_list,
2302 includes_used, symnum_before, dependency_list,
2303 dependencies_used, textlow_not_set);
2305 dependencies_used = 0;
2306 /* Give all psymtabs for this source file the same
2308 pst = xcoff_start_psymtab
2312 objfile->global_psymbols.next,
2313 objfile->static_psymbols.next);
2316 /* Activate the misc_func_recorded mechanism for
2317 compiler- and linker-generated CSECTs like ".strcmp"
2319 if (namestring && (namestring[0] == '.'
2320 || namestring[0] == '@'))
2322 last_csect_name = namestring;
2323 last_csect_val = symbol.n_value;
2324 last_csect_sec = symbol.n_scnum;
2329 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2331 if (highval > pst->texthigh)
2332 pst->texthigh = highval;
2333 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2334 pst->textlow = symbol.n_value;
2336 misc_func_recorded = 0;
2341 /* Data variables are recorded in the minimal symbol
2342 table, except for section symbols. */
2343 if (*namestring != '.')
2344 record_minimal_symbol
2345 (namestring, symbol.n_value,
2346 sclass == C_HIDEXT ? mst_file_data : mst_data,
2347 symbol.n_scnum, objfile);
2352 warning (_("More than one XMC_TC0 symbol found."));
2353 toc_offset = symbol.n_value;
2355 /* Make TOC offset relative to start address of
2357 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2359 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2363 /* These symbols tell us where the TOC entry for a
2364 variable is, not the variable itself. */
2373 switch (csect_aux.x_csect.x_smclas)
2376 /* A function entry point. */
2378 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2379 first_fun_line_offset =
2380 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2382 record_minimal_symbol
2383 (namestring, symbol.n_value,
2384 sclass == C_HIDEXT ? mst_file_text : mst_text,
2385 symbol.n_scnum, objfile);
2386 misc_func_recorded = 1;
2391 /* shared library function trampoline code entry
2394 /* record trampoline code entries as
2395 mst_solib_trampoline symbol. When we lookup mst
2396 symbols, we will choose mst_text over
2397 mst_solib_trampoline. */
2398 record_minimal_symbol
2399 (namestring, symbol.n_value,
2400 mst_solib_trampoline, symbol.n_scnum, objfile);
2401 misc_func_recorded = 1;
2405 /* The symbols often have the same names as
2406 debug symbols for functions, and confuse
2412 /* xlc puts each variable in a separate csect,
2413 so we get an XTY_SD for each variable. But
2414 gcc puts several variables in a csect, so
2415 that each variable only gets an XTY_LD. We
2416 still need to record them. This will
2417 typically be XMC_RW; I suspect XMC_RO and
2418 XMC_BS might be possible too. */
2419 if (*namestring != '.')
2420 record_minimal_symbol
2421 (namestring, symbol.n_value,
2422 sclass == C_HIDEXT ? mst_file_data : mst_data,
2423 symbol.n_scnum, objfile);
2429 switch (csect_aux.x_csect.x_smclas)
2433 /* Common variables are recorded in the minimal symbol
2434 table, except for section symbols. */
2435 if (*namestring != '.')
2436 record_minimal_symbol
2437 (namestring, symbol.n_value,
2438 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2439 symbol.n_scnum, objfile);
2451 unsigned int symnum_before;
2453 symnum_before = ssymnum;
2454 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2457 /* See if the last csect needs to be recorded. */
2459 if (last_csect_name && !misc_func_recorded)
2461 /* If no misc. function recorded in the last seen csect, enter
2462 it as a function. This will take care of functions like
2463 strcmp() compiled by xlc. */
2465 record_minimal_symbol (last_csect_name, last_csect_val,
2466 mst_text, last_csect_sec, objfile);
2467 misc_func_recorded = 1;
2472 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2473 includes_used, symnum_before,
2474 dependency_list, dependencies_used,
2477 dependencies_used = 0;
2479 first_fun_line_offset = 0;
2481 /* XCOFF, according to the AIX 3.2 documentation, puts the
2482 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2483 do things the standard COFF way and put it in the auxent.
2484 We use the auxent if the symbol is ".file" and an auxent
2485 exists, otherwise use the symbol itself. */
2486 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2488 filestring = coff_getfilename (&main_aux[0], objfile);
2491 filestring = namestring;
2493 pst = xcoff_start_psymtab (objfile,
2496 objfile->global_psymbols.next,
2497 objfile->static_psymbols.next);
2498 last_csect_name = NULL;
2504 complaint (&symfile_complaints,
2505 _("Storage class %d not recognized during scan"),
2510 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2511 to handle only the C_FUN and C_EXT. */
2526 /* C_EINCL means we are switching back to the main file. But there
2527 is no reason to care; the only thing we want to know about
2528 includes is the names of all the included (.h) files. */
2533 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2537 /* I don't think the name of the common block (as opposed to the
2538 variables within it) is something which is user visible
2546 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2547 so C_LSYM would appear to be only for locals. */
2553 /* We probably could save a few instructions by assuming that
2554 C_LSYM, C_PSYM, etc., never have auxents. */
2555 int naux1 = symbol.n_numaux + 1;
2558 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2564 /* Mark down an include file in the current psymtab. */
2565 enum language tmp_language;
2567 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2570 tmp_language = deduce_language_from_filename (namestring);
2572 /* Only change the psymtab's language if we've learned
2573 something useful (eg. tmp_language is not language_unknown).
2574 In addition, to match what start_subfile does, never change
2576 if (tmp_language != language_unknown
2577 && (tmp_language != language_c
2578 || psymtab_language != language_cplus))
2579 psymtab_language = tmp_language;
2581 /* In C++, one may expect the same filename to come round many
2582 times, when code is coming alternately from the main file
2583 and from inline functions in other files. So I check to see
2584 if this is a file we've seen before -- either the main
2585 source file, or a previously included file.
2587 This seems to be a lot of time to be spending on N_SOL, but
2588 things like "break c-exp.y:435" need to work (I
2589 suppose the psymtab_include_list could be hashed or put
2590 in a binary tree, if profiling shows this is a major hog). */
2591 if (pst && strcmp (namestring, pst->filename) == 0)
2597 for (i = 0; i < includes_used; i++)
2598 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2606 psymtab_include_list[includes_used++] = namestring;
2607 if (includes_used >= includes_allocated)
2609 const char **orig = psymtab_include_list;
2611 psymtab_include_list = (const char **)
2612 alloca ((includes_allocated *= 2) *
2613 sizeof (const char *));
2614 memcpy (psymtab_include_list, orig,
2615 includes_used * sizeof (const char *));
2620 /* The value of the C_FUN is not the address of the function (it
2621 appears to be the address before linking), but as long as it
2622 is smaller than the actual address, then find_pc_partial_function
2623 will use the minimal symbols instead. I hope. */
2632 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2635 p = strchr (namestring, ':');
2637 continue; /* Not a debugging symbol. */
2639 /* Main processing section for debugging symbols which
2640 the initial read through the symbol tables needs to worry
2641 about. If we reach this point, the symbol which we are
2642 considering is definitely one we are interested in.
2643 p must also contain the (valid) index into the namestring
2644 which indicates the debugging type symbol. */
2649 symbol.n_value += ANOFFSET (objfile->section_offsets,
2650 SECT_OFF_DATA (objfile));
2652 if (gdbarch_static_transform_name_p (gdbarch))
2653 namestring = gdbarch_static_transform_name
2654 (gdbarch, namestring);
2656 add_psymbol_to_list (namestring, p - namestring, 1,
2657 VAR_DOMAIN, LOC_STATIC,
2658 &objfile->static_psymbols,
2660 psymtab_language, objfile);
2664 symbol.n_value += ANOFFSET (objfile->section_offsets,
2665 SECT_OFF_DATA (objfile));
2666 /* The addresses in these entries are reported to be
2667 wrong. See the code that reads 'G's for symtabs. */
2668 add_psymbol_to_list (namestring, p - namestring, 1,
2669 VAR_DOMAIN, LOC_STATIC,
2670 &objfile->global_psymbols,
2672 psymtab_language, objfile);
2676 /* When a 'T' entry is defining an anonymous enum, it
2677 may have a name which is the empty string, or a
2678 single space. Since they're not really defining a
2679 symbol, those shouldn't go in the partial symbol
2680 table. We do pick up the elements of such enums at
2681 'check_enum:', below. */
2682 if (p >= namestring + 2
2683 || (p == namestring + 1
2684 && namestring[0] != ' '))
2686 add_psymbol_to_list (namestring, p - namestring, 1,
2687 STRUCT_DOMAIN, LOC_TYPEDEF,
2688 &objfile->static_psymbols,
2689 0, psymtab_language, objfile);
2692 /* Also a typedef with the same name. */
2693 add_psymbol_to_list (namestring, p - namestring, 1,
2694 VAR_DOMAIN, LOC_TYPEDEF,
2695 &objfile->static_psymbols,
2696 0, psymtab_language, objfile);
2703 if (p != namestring) /* a name is there, not just :T... */
2705 add_psymbol_to_list (namestring, p - namestring, 1,
2706 VAR_DOMAIN, LOC_TYPEDEF,
2707 &objfile->static_psymbols,
2708 0, psymtab_language, objfile);
2711 /* If this is an enumerated type, we need to
2712 add all the enum constants to the partial symbol
2713 table. This does not cover enums without names, e.g.
2714 "enum {a, b} c;" in C, but fortunately those are
2715 rare. There is no way for GDB to find those from the
2716 enum type without spending too much time on it. Thus
2717 to solve this problem, the compiler needs to put out the
2718 enum in a nameless type. GCC2 does this. */
2720 /* We are looking for something of the form
2721 <name> ":" ("t" | "T") [<number> "="] "e"
2722 {<constant> ":" <value> ","} ";". */
2724 /* Skip over the colon and the 't' or 'T'. */
2726 /* This type may be given a number. Also, numbers can come
2727 in pairs like (0,26). Skip over it. */
2728 while ((*p >= '0' && *p <= '9')
2729 || *p == '(' || *p == ',' || *p == ')'
2735 /* The aix4 compiler emits extra crud before the
2739 /* Skip over the type (?). */
2743 /* Skip over the colon. */
2747 /* We have found an enumerated type. */
2748 /* According to comments in read_enum_type
2749 a comma could end it instead of a semicolon.
2750 I don't know where that happens.
2752 while (*p && *p != ';' && *p != ',')
2756 /* Check for and handle cretinous dbx symbol name
2758 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2759 p = next_symbol_text (objfile);
2761 /* Point to the character after the name
2762 of the enum constant. */
2763 for (q = p; *q && *q != ':'; q++)
2765 /* Note that the value doesn't matter for
2766 enum constants in psymtabs, just in symtabs. */
2767 add_psymbol_to_list (p, q - p, 1,
2768 VAR_DOMAIN, LOC_CONST,
2769 &objfile->static_psymbols,
2770 0, psymtab_language, objfile);
2771 /* Point past the name. */
2773 /* Skip over the value. */
2774 while (*p && *p != ',')
2776 /* Advance past the comma. */
2784 /* Constant, e.g. from "const" in Pascal. */
2785 add_psymbol_to_list (namestring, p - namestring, 1,
2786 VAR_DOMAIN, LOC_CONST,
2787 &objfile->static_psymbols,
2788 0, psymtab_language, objfile);
2794 int name_len = p - namestring;
2795 char *name = (char *) xmalloc (name_len + 1);
2797 memcpy (name, namestring, name_len);
2798 name[name_len] = '\0';
2799 function_outside_compilation_unit_complaint (name);
2802 symbol.n_value += ANOFFSET (objfile->section_offsets,
2803 SECT_OFF_TEXT (objfile));
2804 add_psymbol_to_list (namestring, p - namestring, 1,
2805 VAR_DOMAIN, LOC_BLOCK,
2806 &objfile->static_psymbols,
2808 psymtab_language, objfile);
2811 /* Global functions were ignored here, but now they
2812 are put into the global psymtab like one would expect.
2813 They're also in the minimal symbol table. */
2817 int name_len = p - namestring;
2818 char *name = (char *) xmalloc (name_len + 1);
2820 memcpy (name, namestring, name_len);
2821 name[name_len] = '\0';
2822 function_outside_compilation_unit_complaint (name);
2826 /* We need only the minimal symbols for these
2827 loader-generated definitions. Keeping the global
2828 symbols leads to "in psymbols but not in symbols"
2830 if (startswith (namestring, "@FIX"))
2833 symbol.n_value += ANOFFSET (objfile->section_offsets,
2834 SECT_OFF_TEXT (objfile));
2835 add_psymbol_to_list (namestring, p - namestring, 1,
2836 VAR_DOMAIN, LOC_BLOCK,
2837 &objfile->global_psymbols,
2839 psymtab_language, objfile);
2842 /* Two things show up here (hopefully); static symbols of
2843 local scope (static used inside braces) or extensions
2844 of structure symbols. We can ignore both. */
2858 case '#': /* For symbol identification (used in
2863 /* It is a C++ nested symbol. We don't need to record it
2864 (I don't think); if we try to look up foo::bar::baz,
2865 then symbols for the symtab containing foo should get
2866 read in, I think. */
2867 /* Someone says sun cc puts out symbols like
2868 /foo/baz/maclib::/usr/local/bin/maclib,
2869 which would get here with a symbol type of ':'. */
2873 /* Unexpected symbol descriptor. The second and
2874 subsequent stabs of a continued stab can show up
2875 here. The question is whether they ever can mimic
2876 a normal stab--it would be nice if not, since we
2877 certainly don't want to spend the time searching to
2878 the end of every string looking for a
2881 complaint (&symfile_complaints,
2882 _("unknown symbol descriptor `%c'"), p[1]);
2884 /* Ignore it; perhaps it is an extension that we don't
2894 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2895 ssymnum, dependency_list,
2896 dependencies_used, textlow_not_set);
2899 /* Record the toc offset value of this symbol table into objfile
2900 structure. If no XMC_TC0 is found, toc_offset should be zero.
2901 Another place to obtain this information would be file auxiliary
2904 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2907 /* Return the toc offset value for a given objfile. */
2910 xcoff_get_toc_offset (struct objfile *objfile)
2913 return XCOFF_DATA (objfile)->toc_offset;
2917 /* Scan and build partial symbols for a symbol file.
2918 We have been initialized by a call to dbx_symfile_init, which
2919 put all the relevant info into a "struct dbx_symfile_info",
2920 hung off the objfile structure.
2922 SECTION_OFFSETS contains offsets relative to which the symbols in the
2923 various sections are (depending where the sections were actually
2927 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2931 struct cleanup *back_to;
2932 int num_symbols; /* # of symbols */
2933 file_ptr symtab_offset; /* symbol table and */
2934 file_ptr stringtab_offset; /* string table file offsets */
2935 struct coff_symfile_info *info;
2939 info = XCOFF_DATA (objfile);
2940 symfile_bfd = abfd = objfile->obfd;
2941 name = objfile_name (objfile);
2943 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2944 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2945 stringtab_offset = symtab_offset +
2946 num_symbols * coff_data (abfd)->local_symesz;
2948 info->min_lineno_offset = 0;
2949 info->max_lineno_offset = 0;
2950 bfd_map_over_sections (abfd, find_linenos, info);
2952 if (num_symbols > 0)
2954 /* Read the string table. */
2955 init_stringtab (abfd, stringtab_offset, objfile);
2957 /* Read the .debug section, if present. */
2959 struct bfd_section *secp;
2960 bfd_size_type length;
2961 bfd_byte *debugsec = NULL;
2963 secp = bfd_get_section_by_name (abfd, ".debug");
2966 length = bfd_section_size (abfd, secp);
2970 = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
2973 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2975 error (_("Error reading .debug section of `%s': %s"),
2976 name, bfd_errmsg (bfd_get_error ()));
2980 info->debugsec = (char *) debugsec;
2984 /* Read the symbols. We keep them in core because we will want to
2985 access them randomly in read_symbol*. */
2986 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2988 error (_("Error reading symbols from %s: %s"),
2989 name, bfd_errmsg (bfd_get_error ()));
2990 size = coff_data (abfd)->local_symesz * num_symbols;
2991 info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size);
2992 info->symtbl_num_syms = num_symbols;
2994 val = bfd_bread (info->symtbl, size, abfd);
2996 perror_with_name (_("reading symbol table"));
2998 /* If we are reinitializing, or if we have never loaded syms yet, init. */
2999 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3000 /* I'm not sure how how good num_symbols is; the rule of thumb in
3001 init_psymbol_list was developed for a.out. On the one hand,
3002 num_symbols includes auxents. On the other hand, it doesn't
3004 init_psymbol_list (objfile, num_symbols);
3006 free_pending_blocks ();
3007 back_to = make_cleanup (really_free_pendings, 0);
3009 init_minimal_symbol_collection ();
3010 make_cleanup_discard_minimal_symbols ();
3012 /* Now that the symbol table data of the executable file are all in core,
3013 process them and define symbols accordingly. */
3015 scan_xcoff_symtab (objfile);
3017 /* Install any minimal symbols that have been collected as the current
3018 minimal symbols for this objfile. */
3020 install_minimal_symbols (objfile);
3022 /* DWARF2 sections. */
3024 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3025 dwarf2_build_psymtabs (objfile);
3027 dwarf2_build_frame_info (objfile);
3029 do_cleanups (back_to);
3033 xcoff_symfile_offsets (struct objfile *objfile,
3034 const struct section_addr_info *addrs)
3036 const char *first_section_name;
3038 default_symfile_offsets (objfile, addrs);
3040 /* Oneof the weird side-effects of default_symfile_offsets is that
3041 it sometimes sets some section indices to zero for sections that,
3042 in fact do not exist. See the body of default_symfile_offsets
3043 for more info on when that happens. Undo that, as this then allows
3044 us to test whether the associated section exists or not, and then
3045 access it quickly (without searching it again). */
3047 if (objfile->num_sections == 0)
3048 return; /* Is that even possible? Better safe than sorry. */
3051 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3053 if (objfile->sect_index_text == 0
3054 && strcmp (first_section_name, ".text") != 0)
3055 objfile->sect_index_text = -1;
3057 if (objfile->sect_index_data == 0
3058 && strcmp (first_section_name, ".data") != 0)
3059 objfile->sect_index_data = -1;
3061 if (objfile->sect_index_bss == 0
3062 && strcmp (first_section_name, ".bss") != 0)
3063 objfile->sect_index_bss = -1;
3065 if (objfile->sect_index_rodata == 0
3066 && strcmp (first_section_name, ".rodata") != 0)
3067 objfile->sect_index_rodata = -1;
3070 /* Register our ability to parse symbols for xcoff BFD files. */
3072 static const struct sym_fns xcoff_sym_fns =
3075 /* It is possible that coff and xcoff should be merged as
3076 they do have fundamental similarities (for example, the extra storage
3077 classes used for stabs could presumably be recognized in any COFF file).
3078 However, in addition to obvious things like all the csect hair, there are
3079 some subtler differences between xcoffread.c and coffread.c, notably
3080 the fact that coffread.c has no need to read in all the symbols, but
3081 xcoffread.c reads all the symbols and does in fact randomly access them
3082 (in C_BSTAT and line number processing). */
3084 xcoff_new_init, /* init anything gbl to entire symtab */
3085 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3086 xcoff_initial_scan, /* read a symbol file into symtab */
3087 NULL, /* sym_read_psymbols */
3088 xcoff_symfile_finish, /* finished with file, cleanup */
3089 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3090 default_symfile_segments, /* Get segment information from a file. */
3091 aix_process_linenos,
3092 default_symfile_relocate, /* Relocate a debug section. */
3093 NULL, /* sym_probe_fns */
3097 /* Same as xcoff_get_n_import_files, but for core files. */
3100 xcoff_get_core_n_import_files (bfd *abfd)
3102 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3104 file_ptr offset = 0;
3108 return -1; /* Not a core file. */
3110 for (offset = 0; offset < bfd_get_section_size (sect);)
3116 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3118 next = bfd_get_32 (abfd, buf);
3120 break; /* This is the last entry. */
3124 /* Return the number of entries, excluding the first one, which is
3125 the path to the executable that produced this core file. */
3126 return n_entries - 1;
3129 /* Return the number of import files (shared libraries) that the given
3130 BFD depends on. Return -1 if this number could not be computed. */
3133 xcoff_get_n_import_files (bfd *abfd)
3135 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3139 /* If the ".loader" section does not exist, the objfile is probably
3140 not an executable. Might be a core file... */
3142 return xcoff_get_core_n_import_files (abfd);
3144 /* The number of entries in the Import Files Table is stored in
3145 field l_nimpid. This field is always at offset 16, and is
3146 always 4 bytes long. Read those 4 bytes. */
3148 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3150 l_nimpid = bfd_get_32 (abfd, buf);
3152 /* By convention, the first entry is the default LIBPATH value
3153 to be used by the system loader, so it does not count towards
3154 the number of import files. */
3155 return l_nimpid - 1;
3158 /* Free the per-objfile xcoff data. */
3161 xcoff_free_info (struct objfile *objfile, void *arg)
3166 /* Provide a prototype to silence -Wmissing-prototypes. */
3167 extern initialize_file_ftype _initialize_xcoffread;
3170 _initialize_xcoffread (void)
3172 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3174 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,