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 = (struct linetable_entry *)
439 xmalloc (fentry_size * sizeof (struct linetable_entry));
441 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
443 if (oldLineTb->item[ii].line == 0)
444 { /* Function entry found. */
445 if (function_count >= fentry_size)
446 { /* Make sure you have room. */
448 fentry = (struct linetable_entry *)
450 fentry_size * sizeof (struct linetable_entry));
452 fentry[function_count].line = ii;
453 fentry[function_count].pc = oldLineTb->item[ii].pc;
456 /* If the function was compiled with XLC, we may have to add an
457 extra line entry later. Reserve space for that. */
458 if (ii + 1 < oldLineTb->nitems
459 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
464 if (function_count == 0)
469 else if (function_count > 1)
470 qsort (fentry, function_count,
471 sizeof (struct linetable_entry), compare_lte);
473 /* Allocate a new line table. */
474 newLineTb = (struct linetable *)
476 (sizeof (struct linetable) +
477 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
479 /* If line table does not start with a function beginning, copy up until
483 if (oldLineTb->item[0].line != 0)
485 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
486 newLineTb->item[newline] = oldLineTb->item[newline];
488 /* Now copy function lines one by one. */
490 for (ii = 0; ii < function_count; ++ii)
492 /* If the function was compiled with XLC, we may have to add an
493 extra line to cover the function prologue. */
494 jj = fentry[ii].line;
495 if (jj + 1 < oldLineTb->nitems
496 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
498 newLineTb->item[newline] = oldLineTb->item[jj];
499 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
503 for (jj = fentry[ii].line + 1;
504 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
506 newLineTb->item[newline] = oldLineTb->item[jj];
509 /* The number of items in the line table must include these
510 extra lines which were added in case of XLC compiled functions. */
511 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
515 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
516 following `IncludeChain'. At the end of each symtab (end_symtab),
517 we will determine if we should create additional symtab's to
518 represent if (the include files. */
521 typedef struct _inclTable
523 char *name; /* include filename */
525 /* Offsets to the line table. end points to the last entry which is
526 part of this include file. */
529 struct subfile *subfile;
530 unsigned funStartLine; /* Start line # of its function. */
534 #define INITIAL_INCLUDE_TABLE_LENGTH 20
535 static InclTable *inclTable; /* global include table */
536 static int inclIndx; /* last entry to table */
537 static int inclLength; /* table length */
538 static int inclDepth; /* nested include depth */
540 static void allocate_include_entry (void);
543 record_include_begin (struct coff_symbol *cs)
547 /* In xcoff, we assume include files cannot be nested (not in .c files
548 of course, but in corresponding .s files.). */
550 /* This can happen with old versions of GCC.
551 GCC 2.3.3-930426 does not exhibit this on a test case which
552 a user said produced the message for him. */
553 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
557 allocate_include_entry ();
559 inclTable[inclIndx].name = cs->c_name;
560 inclTable[inclIndx].begin = cs->c_value;
564 record_include_end (struct coff_symbol *cs)
570 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
573 allocate_include_entry ();
575 pTbl = &inclTable[inclIndx];
576 pTbl->end = cs->c_value;
583 allocate_include_entry (void)
585 if (inclTable == NULL)
587 inclTable = (InclTable *)
588 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
590 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
591 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
594 else if (inclIndx >= inclLength)
596 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
597 inclTable = (InclTable *)
598 xrealloc (inclTable, sizeof (InclTable) * inclLength);
599 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
600 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
604 /* Global variable to pass the psymtab down to all the routines involved
605 in psymtab to symtab processing. */
606 static struct partial_symtab *this_symtab_psymtab;
608 /* Objfile related to this_symtab_psymtab; set at the same time. */
609 static struct objfile *this_symtab_objfile;
611 /* given the start and end addresses of a compilation unit (or a csect,
612 at times) process its lines and create appropriate line vectors. */
615 process_linenos (CORE_ADDR start, CORE_ADDR end)
619 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
621 /* subfile structure for the main compilation unit. */
622 struct subfile main_subfile;
624 /* In the main source file, any time we see a function entry, we
625 reset this variable to function's absolute starting line number.
626 All the following line numbers in the function are relative to
627 this, and we record absolute line numbers in record_line(). */
629 unsigned int main_source_baseline = 0;
634 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
636 goto return_after_cleanup;
638 memset (&main_subfile, '\0', sizeof (main_subfile));
641 /* All source lines were in the main source file. None in include
644 enter_line_range (&main_subfile, offset, 0, start, end,
645 &main_source_baseline);
649 /* There was source with line numbers in include files. */
652 coff_data (this_symtab_objfile->obfd)->local_linesz;
653 main_source_baseline = 0;
655 for (ii = 0; ii < inclIndx; ++ii)
657 struct subfile *tmpSubfile;
659 /* If there is main file source before include file, enter it. */
660 if (offset < inclTable[ii].begin)
663 (&main_subfile, offset, inclTable[ii].begin - linesz,
664 start, 0, &main_source_baseline);
667 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
669 /* The entry in the include table refers to the main source
670 file. Add the lines to the main subfile. */
672 main_source_baseline = inclTable[ii].funStartLine;
674 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
675 start, 0, &main_source_baseline);
676 inclTable[ii].subfile = &main_subfile;
680 /* Have a new subfile for the include file. */
682 tmpSubfile = inclTable[ii].subfile =
683 (struct subfile *) xmalloc (sizeof (struct subfile));
685 memset (tmpSubfile, '\0', sizeof (struct subfile));
686 firstLine = &(inclTable[ii].funStartLine);
688 /* Enter include file's lines now. */
689 enter_line_range (tmpSubfile, inclTable[ii].begin,
690 inclTable[ii].end, start, 0, firstLine);
693 if (offset <= inclTable[ii].end)
694 offset = inclTable[ii].end + linesz;
697 /* All the include files' line have been processed at this point. Now,
698 enter remaining lines of the main file, if any left. */
699 if (offset < max_offset + 1 - linesz)
701 enter_line_range (&main_subfile, offset, 0, start, end,
702 &main_source_baseline);
706 /* Process main file's line numbers. */
707 if (main_subfile.line_vector)
709 struct linetable *lineTb, *lv;
711 lv = main_subfile.line_vector;
713 /* Line numbers are not necessarily ordered. xlc compilation will
714 put static function to the end. */
716 lineTb = arrange_linetable (lv);
719 current_subfile->line_vector = (struct linetable *)
720 xrealloc (lv, (sizeof (struct linetable)
721 + lv->nitems * sizeof (struct linetable_entry)));
726 current_subfile->line_vector = lineTb;
729 current_subfile->line_vector_length =
730 current_subfile->line_vector->nitems;
733 /* Now, process included files' line numbers. */
735 for (ii = 0; ii < inclIndx; ++ii)
737 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
738 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
741 struct linetable *lineTb, *lv;
743 lv = (inclTable[ii].subfile)->line_vector;
745 /* Line numbers are not necessarily ordered. xlc compilation will
746 put static function to the end. */
748 lineTb = arrange_linetable (lv);
752 /* For the same include file, we might want to have more than one
753 subfile. This happens if we have something like:
761 while foo.h including code in it. (stupid but possible)
762 Since start_subfile() looks at the name and uses an
763 existing one if finds, we need to provide a fake name and
767 start_subfile (inclTable[ii].name);
770 /* Pick a fake name that will produce the same results as this
771 one when passed to deduce_language_from_filename. Kludge on
773 char *fakename = strrchr (inclTable[ii].name, '.');
775 if (fakename == NULL)
777 start_subfile (fakename);
778 xfree (current_subfile->name);
780 current_subfile->name = xstrdup (inclTable[ii].name);
785 current_subfile->line_vector =
786 (struct linetable *) xrealloc
787 (lv, (sizeof (struct linetable)
788 + lv->nitems * sizeof (struct linetable_entry)));
794 current_subfile->line_vector = lineTb;
797 current_subfile->line_vector_length =
798 current_subfile->line_vector->nitems;
799 start_subfile (pop_subfile ());
803 return_after_cleanup:
805 /* We don't want to keep alloc/free'ing the global include file table. */
810 aix_process_linenos (struct objfile *objfile)
812 /* There is no linenos to read if there are only dwarf info. */
813 if (this_symtab_psymtab == NULL)
816 /* Process line numbers and enter them into line vector. */
817 process_linenos (last_source_start_addr, cur_src_end_addr);
821 /* Enter a given range of lines into the line vector.
822 can be called in the following two ways:
823 enter_line_range (subfile, beginoffset, endoffset,
824 startaddr, 0, firstLine) or
825 enter_line_range (subfile, beginoffset, 0,
826 startaddr, endaddr, firstLine)
828 endoffset points to the last line table entry that we should pay
832 enter_line_range (struct subfile *subfile, unsigned beginoffset,
833 unsigned endoffset, /* offsets to line table */
834 CORE_ADDR startaddr, /* offsets to line table */
835 CORE_ADDR endaddr, unsigned *firstLine)
837 struct objfile *objfile = this_symtab_objfile;
838 struct gdbarch *gdbarch = get_objfile_arch (objfile);
839 unsigned int curoffset;
842 struct internal_lineno int_lnno;
843 unsigned int limit_offset;
847 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
849 curoffset = beginoffset;
850 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
854 if (endoffset >= limit_offset)
856 complaint (&symfile_complaints,
857 _("Bad line table offset in C_EINCL directive"));
860 limit_offset = endoffset;
865 abfd = objfile->obfd;
866 linesz = coff_data (abfd)->local_linesz;
867 ext_lnno = alloca (linesz);
869 while (curoffset <= limit_offset)
871 bfd_seek (abfd, curoffset, SEEK_SET);
872 bfd_bread (ext_lnno, linesz, abfd);
873 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
875 /* Find the address this line represents. */
876 addr = (int_lnno.l_lnno
877 ? int_lnno.l_addr.l_paddr
878 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
879 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
881 if (addr < startaddr || (endaddr && addr >= endaddr))
884 if (int_lnno.l_lnno == 0)
886 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
887 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
891 record_line (subfile, *firstLine + int_lnno.l_lnno,
892 gdbarch_addr_bits_remove (gdbarch, addr));
898 /* Save the vital information for use when closing off the current file.
899 NAME is the file name the symbols came from, START_ADDR is the first
900 text address for the file, and SIZE is the number of bytes of text. */
902 #define complete_symtab(name, start_addr) { \
903 set_last_source_file (name); \
904 last_source_start_addr = start_addr; \
908 /* Refill the symbol table input buffer
909 and set the variables that control fetching entries from it.
910 Reports an error if no data available.
911 This function can read past the end of the symbol table
912 (into the string table) but this does no harm. */
914 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
916 Creation of all new minimal symbols should go through this function
917 rather than calling the various prim_record_[...] functions in order
918 to make sure that all symbol addresses get properly relocated.
922 NAME - the symbol's name (but if NAME starts with a period, that
923 leading period is discarded).
924 ADDRESS - the symbol's address, prior to relocation. This function
925 relocates the address before recording the minimal symbol.
926 MS_TYPE - the symbol's type.
927 N_SCNUM - the symbol's XCOFF section number.
928 OBJFILE - the objfile associated with the minimal symbol. */
931 record_minimal_symbol (const char *name, CORE_ADDR address,
932 enum minimal_symbol_type ms_type,
934 struct objfile *objfile)
936 int section = secnum_to_section (n_scnum, objfile);
941 prim_record_minimal_symbol_and_info (name, address, ms_type,
942 secnum_to_section (n_scnum, objfile),
946 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
947 nested. At any given time, a symbol can only be in one static block.
948 This is the base address of current static block, zero if non exists. */
950 static int static_block_base = 0;
952 /* Section number for the current static block. */
954 static int static_block_section = -1;
956 /* true if space for symbol name has been allocated. */
958 static int symname_alloced = 0;
960 /* Next symbol to read. Pointer into raw seething symbol table. */
962 static char *raw_symbol;
964 /* This is the function which stabsread.c calls to get symbol
968 xcoff_next_symbol_text (struct objfile *objfile)
970 struct internal_syment symbol;
973 /* FIXME: is this the same as the passed arg? */
974 if (this_symtab_objfile)
975 objfile = this_symtab_objfile;
977 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
980 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
982 /* Return something which points to '\0' and hope the symbol reading
983 code does something reasonable. */
986 else if (symbol.n_sclass & 0x80)
988 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
989 raw_symbol += coff_data (objfile->obfd)->local_symesz;
994 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
996 /* Return something which points to '\0' and hope the symbol reading
997 code does something reasonable. */
1003 /* Read symbols for a given partial symbol table. */
1006 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1008 bfd *abfd = objfile->obfd;
1009 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1010 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1011 char *strtbl = xcoff->strtbl;
1012 char *debugsec = xcoff->debugsec;
1013 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1015 struct internal_syment symbol[1];
1016 union internal_auxent main_aux;
1017 struct coff_symbol cs[1];
1018 CORE_ADDR file_start_addr = 0;
1019 CORE_ADDR file_end_addr = 0;
1021 int next_file_symnum = -1;
1022 unsigned int max_symnum;
1023 int just_started = 1;
1025 CORE_ADDR fcn_start_addr = 0;
1027 struct coff_symbol fcn_stab_saved = { 0 };
1029 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1030 union internal_auxent fcn_aux_saved = main_aux;
1031 struct context_stack *newobj;
1033 char *filestring = " _start_ "; /* Name of the current file. */
1035 const char *last_csect_name; /* Last seen csect's name. */
1037 this_symtab_psymtab = pst;
1038 this_symtab_objfile = objfile;
1040 /* Get the appropriate COFF "constants" related to the file we're
1042 local_symesz = coff_data (abfd)->local_symesz;
1044 set_last_source_file (NULL);
1045 last_csect_name = 0;
1048 start_symtab (objfile, filestring, (char *) NULL, file_start_addr);
1049 record_debugformat (debugfmt);
1050 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1052 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1053 first_object_file_end = 0;
1055 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1057 while (symnum < max_symnum)
1059 QUIT; /* make this command interruptable. */
1061 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1062 /* read one symbol into `cs' structure. After processing the
1063 whole symbol table, only string table will be kept in memory,
1064 symbol table and debug section of xcoff will be freed. Thus
1065 we can mark symbols with names in string table as
1070 /* Swap and align the symbol into a reasonable C structure. */
1071 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1073 cs->c_symnum = symnum;
1074 cs->c_naux = symbol->n_numaux;
1075 if (symbol->n_zeroes)
1077 symname_alloced = 0;
1078 /* We must use the original, unswapped, name here so the name field
1079 pointed to by cs->c_name will persist throughout xcoffread. If
1080 we use the new field, it gets overwritten for each symbol. */
1081 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1082 /* If it's exactly E_SYMNMLEN characters long it isn't
1084 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1088 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
1089 strncpy (p, cs->c_name, E_SYMNMLEN);
1090 p[E_SYMNMLEN] = '\0';
1092 symname_alloced = 1;
1095 else if (symbol->n_sclass & 0x80)
1097 cs->c_name = debugsec + symbol->n_offset;
1098 symname_alloced = 0;
1102 /* in string table */
1103 cs->c_name = strtbl + (int) symbol->n_offset;
1104 symname_alloced = 1;
1106 cs->c_value = symbol->n_value;
1107 cs->c_sclass = symbol->n_sclass;
1108 cs->c_secnum = symbol->n_scnum;
1109 cs->c_type = (unsigned) symbol->n_type;
1111 raw_symbol += local_symesz;
1114 /* Save addr of first aux entry. */
1115 raw_auxptr = raw_symbol;
1117 /* Skip all the auxents associated with this symbol. */
1118 for (ii = symbol->n_numaux; ii; --ii)
1120 raw_symbol += coff_data (abfd)->local_auxesz;
1125 /* if symbol name starts with ".$" or "$", ignore it. */
1126 if (cs->c_name[0] == '$'
1127 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1130 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1132 if (get_last_source_file ())
1134 pst->compunit_symtab = end_symtab (cur_src_end_addr,
1135 SECT_OFF_TEXT (objfile));
1140 start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0);
1141 record_debugformat (debugfmt);
1142 cur_src_end_addr = first_object_file_end;
1143 /* Done with all files, everything from here on is globals. */
1146 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1149 /* Dealing with a symbol with a csect entry. */
1151 #define CSECT(PP) ((PP)->x_csect)
1152 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1153 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1154 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1155 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1157 /* Convert the auxent to something we can access. */
1158 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1159 0, cs->c_naux, &main_aux);
1161 switch (CSECT_SMTYP (&main_aux))
1165 /* Ignore all external references. */
1169 /* A section description. */
1171 switch (CSECT_SCLAS (&main_aux))
1177 /* A program csect is seen. We have to allocate one
1178 symbol table for each program csect. Normally gdb
1179 prefers one symtab for each source file. In case
1180 of AIX, one source file might include more than one
1181 [PR] csect, and they don't have to be adjacent in
1182 terms of the space they occupy in memory. Thus, one
1183 single source file might get fragmented in the
1184 memory and gdb's file start and end address
1185 approach does not work! GCC (and I think xlc) seem
1186 to put all the code in the unnamed program csect. */
1188 if (last_csect_name)
1190 complete_symtab (filestring, file_start_addr);
1191 cur_src_end_addr = file_end_addr;
1192 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1195 /* Give all csects for this source file the same
1197 start_symtab (objfile, filestring, NULL,
1199 record_debugformat (debugfmt);
1202 /* If this is the very first csect seen,
1203 basically `__start'. */
1206 first_object_file_end
1207 = cs->c_value + CSECT_LEN (&main_aux);
1212 cs->c_value + ANOFFSET (objfile->section_offsets,
1213 SECT_OFF_TEXT (objfile));
1214 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1216 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1217 last_csect_name = cs->c_name;
1221 /* All other symbols are put into the minimal symbol
1234 /* Ignore the symbol. */
1242 switch (CSECT_SCLAS (&main_aux))
1245 /* a function entry point. */
1246 function_entry_point:
1248 fcn_start_addr = cs->c_value;
1250 /* save the function header info, which will be used
1251 when `.bf' is seen. */
1253 fcn_aux_saved = main_aux;
1257 /* shared library function trampoline code entry point. */
1261 /* The symbols often have the same names as debug symbols for
1262 functions, and confuse lookup_symbol. */
1266 /* xlc puts each variable in a separate csect, so we get
1267 an XTY_SD for each variable. But gcc puts several
1268 variables in a csect, so that each variable only gets
1269 an XTY_LD. This will typically be XMC_RW; I suspect
1270 XMC_RO and XMC_BS might be possible too.
1271 These variables are put in the minimal symbol table
1278 /* Common symbols are put into the minimal symbol table only. */
1286 /* If explicitly specified as a function, treat is as one. This check
1287 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1288 after the above CSECT check. */
1289 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1291 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1292 0, cs->c_naux, &main_aux);
1293 goto function_entry_point;
1296 switch (cs->c_sclass)
1300 /* c_value field contains symnum of next .file entry in table
1301 or symnum of first global after last .file. */
1303 next_file_symnum = cs->c_value;
1305 /* Complete symbol table for last object file containing
1306 debugging information. */
1308 /* Whether or not there was a csect in the previous file, we
1309 have to call `end_stabs' and `start_stabs' to reset
1310 type_vector, line_vector, etc. structures. */
1312 complete_symtab (filestring, file_start_addr);
1313 cur_src_end_addr = file_end_addr;
1314 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1317 /* XCOFF, according to the AIX 3.2 documentation, puts the
1318 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1319 do things the standard COFF way and put it in the auxent.
1320 We use the auxent if the symbol is ".file" and an auxent
1321 exists, otherwise use the symbol itself. Simple
1323 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1325 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1326 0, cs->c_naux, &main_aux);
1327 filestring = coff_getfilename (&main_aux, objfile);
1330 filestring = cs->c_name;
1333 start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0);
1334 record_debugformat (debugfmt);
1335 last_csect_name = 0;
1337 /* reset file start and end addresses. A compilation unit
1338 with no text (only data) should have zero file
1340 file_start_addr = file_end_addr = 0;
1344 fcn_stab_saved = *cs;
1348 if (strcmp (cs->c_name, ".bf") == 0)
1350 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1351 SECT_OFF_TEXT (objfile));
1353 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1354 0, cs->c_naux, &main_aux);
1356 within_function = 1;
1358 newobj = push_context (0, fcn_start_addr + off);
1360 newobj->name = define_symbol
1361 (fcn_cs_saved.c_value + off,
1362 fcn_stab_saved.c_name, 0, 0, objfile);
1363 if (newobj->name != NULL)
1364 SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
1366 else if (strcmp (cs->c_name, ".ef") == 0)
1368 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1369 0, cs->c_naux, &main_aux);
1371 /* The value of .ef is the address of epilogue code;
1372 not useful for gdb. */
1373 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1374 contains number of lines to '}' */
1376 if (context_stack_depth <= 0)
1377 { /* We attempted to pop an empty context stack. */
1378 ef_complaint (cs->c_symnum);
1379 within_function = 0;
1382 newobj = pop_context ();
1383 /* Stack must be empty now. */
1384 if (context_stack_depth > 0 || newobj == NULL)
1386 ef_complaint (cs->c_symnum);
1387 within_function = 0;
1391 finish_block (newobj->name, &local_symbols, newobj->old_blocks,
1393 (fcn_cs_saved.c_value
1394 + fcn_aux_saved.x_sym.x_misc.x_fsize
1395 + ANOFFSET (objfile->section_offsets,
1396 SECT_OFF_TEXT (objfile))));
1397 within_function = 0;
1402 /* Begin static block. */
1404 struct internal_syment symbol;
1406 read_symbol (&symbol, cs->c_value);
1407 static_block_base = symbol.n_value;
1408 static_block_section =
1409 secnum_to_section (symbol.n_scnum, objfile);
1414 /* End of static block. */
1415 static_block_base = 0;
1416 static_block_section = -1;
1427 complaint (&symfile_complaints,
1428 _("Unrecognized storage class %d."),
1443 /* beginning of include file */
1444 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1445 order. Thus, when wee see them, we might not know enough info
1446 to process them. Thus, we'll be saving them into a table
1447 (inclTable) and postpone their processing. */
1449 record_include_begin (cs);
1453 /* End of include file. */
1454 /* See the comment after case C_BINCL. */
1455 record_include_end (cs);
1459 if (strcmp (cs->c_name, ".bb") == 0)
1462 newobj = push_context (depth,
1464 + ANOFFSET (objfile->section_offsets,
1465 SECT_OFF_TEXT (objfile))));
1467 else if (strcmp (cs->c_name, ".eb") == 0)
1469 if (context_stack_depth <= 0)
1470 { /* We attempted to pop an empty context stack. */
1471 eb_complaint (cs->c_symnum);
1474 newobj = pop_context ();
1475 if (depth-- != newobj->depth)
1477 eb_complaint (cs->c_symnum);
1480 if (local_symbols && context_stack_depth > 0)
1482 /* Make a block for the local symbols within. */
1483 finish_block (newobj->name, &local_symbols, newobj->old_blocks,
1486 + ANOFFSET (objfile->section_offsets,
1487 SECT_OFF_TEXT (objfile))));
1489 local_symbols = newobj->locals;
1494 process_xcoff_symbol (cs, objfile);
1499 if (get_last_source_file ())
1501 struct compunit_symtab *cust;
1503 complete_symtab (filestring, file_start_addr);
1504 cur_src_end_addr = file_end_addr;
1505 cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1506 /* When reading symbols for the last C_FILE of the objfile, try
1507 to make sure that we set pst->compunit_symtab to the symtab for the
1508 file, not to the _globals_ symtab. I'm not sure whether this
1509 actually works right or when/if it comes up. */
1510 if (pst->compunit_symtab == NULL)
1511 pst->compunit_symtab = cust;
1516 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1517 (SYMBOL2) = (struct symbol *) \
1518 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1519 *(SYMBOL2) = *(SYMBOL1);
1522 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1523 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1524 (NAME), strlen (NAME)))
1527 /* process one xcoff symbol. */
1529 static struct symbol *
1530 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1532 struct symbol onesymbol;
1533 struct symbol *sym = &onesymbol;
1534 struct symbol *sym2 = NULL;
1540 if (cs->c_secnum < 0)
1542 /* The value is a register number, offset within a frame, etc.,
1543 and does not get relocated. */
1549 sec = secnum_to_section (cs->c_secnum, objfile);
1550 off = ANOFFSET (objfile->section_offsets, sec);
1557 initialize_objfile_symbol (sym);
1559 /* default assumptions */
1560 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1561 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1562 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1564 if (ISFCN (cs->c_type))
1566 /* At this point, we don't know the type of the function. This
1567 will be patched with the type from its stab entry later on in
1568 patch_block_stabs (), unless the file was compiled without -g. */
1570 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1571 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1573 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1574 SYMBOL_DUP (sym, sym2);
1576 if (cs->c_sclass == C_EXT)
1577 add_symbol_to_list (sym2, &global_symbols);
1578 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1579 add_symbol_to_list (sym2, &file_symbols);
1583 /* In case we can't figure out the type, provide default. */
1584 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1586 switch (cs->c_sclass)
1589 /* The values of functions and global symbols are now resolved
1590 via the global_sym_chain in stabsread.c. */
1592 if (fcn_cs_saved.c_sclass == C_EXT)
1593 add_stab_to_list (name, &global_stabs);
1595 add_stab_to_list (name, &file_stabs);
1599 add_stab_to_list (name, &global_stabs);
1604 common_block_start (cs->c_name, objfile);
1608 common_block_end (objfile);
1612 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1625 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1628 SYMBOL_SECTION (sym) = sec;
1635 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1636 all statics and we need to distinguish file-scope versus
1637 function-scope using within_function. We do this by
1638 changing the string we pass to define_symbol to use 'S'
1639 where we need to, which is not necessarily super-clean,
1640 but seems workable enough. */
1645 pp = strchr (name, ':');
1650 if (*pp == 'V' && !within_function)
1652 sym = define_symbol ((cs->c_value
1653 + ANOFFSET (objfile->section_offsets,
1654 static_block_section)),
1655 cs->c_name, 0, 0, objfile);
1658 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1659 SYMBOL_SECTION (sym) = static_block_section;
1668 /* Extract the file name from the aux entry of a C_FILE symbol.
1669 Result is in static storage and is only good for temporary use. */
1672 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1674 static char buffer[BUFSIZ];
1676 if (aux_entry->x_file.x_n.x_zeroes == 0)
1677 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1678 + aux_entry->x_file.x_n.x_offset));
1681 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1682 buffer[FILNMLEN] = '\0';
1687 /* Set *SYMBOL to symbol number symno in symtbl. */
1689 read_symbol (struct internal_syment *symbol, int symno)
1691 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1692 int nsyms = xcoff->symtbl_num_syms;
1693 char *stbl = xcoff->symtbl;
1695 if (symno < 0 || symno >= nsyms)
1697 complaint (&symfile_complaints, _("Invalid symbol offset"));
1698 symbol->n_value = 0;
1699 symbol->n_scnum = -1;
1702 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1703 stbl + (symno * local_symesz),
1707 /* Get value corresponding to symbol number symno in symtbl. */
1710 read_symbol_nvalue (int symno)
1712 struct internal_syment symbol[1];
1714 read_symbol (symbol, symno);
1715 return symbol->n_value;
1719 /* Find the address of the function corresponding to symno, where
1720 symno is the symbol pointed to by the linetable. */
1723 read_symbol_lineno (int symno)
1725 struct objfile *objfile = this_symtab_objfile;
1726 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1728 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1729 int nsyms = info->symtbl_num_syms;
1730 char *stbl = info->symtbl;
1731 char *strtbl = info->strtbl;
1733 struct internal_syment symbol[1];
1734 union internal_auxent main_aux[1];
1738 bf_notfound_complaint ();
1742 /* Note that just searching for a short distance (e.g. 50 symbols)
1743 is not enough, at least in the following case.
1746 [many .stabx entries]
1747 [a few functions, referring to foo]
1751 What happens here is that the assembler moves the .stabx entries
1752 to right before the ".bf" for foo, but the symbol for "foo" is before
1753 all the stabx entries. See PR gdb/2222. */
1755 /* Maintaining a table of .bf entries might be preferable to this search.
1756 If I understand things correctly it would need to be done only for
1757 the duration of a single psymtab to symtab conversion. */
1758 while (symno < nsyms)
1760 bfd_coff_swap_sym_in (symfile_bfd,
1761 stbl + (symno * local_symesz), symbol);
1762 if (symbol->n_sclass == C_FCN)
1764 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1766 if (strcmp (name, ".bf") == 0)
1769 symno += symbol->n_numaux + 1;
1772 bf_notfound_complaint ();
1776 /* Take aux entry and return its lineno. */
1778 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1779 symbol->n_type, symbol->n_sclass,
1780 0, symbol->n_numaux, main_aux);
1782 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1785 /* Support for line number handling. */
1787 /* This function is called for every section; it finds the outer limits
1788 * of the line table (minimum and maximum file offset) so that the
1789 * mainline code can read the whole thing for efficiency.
1792 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1794 struct coff_symfile_info *info;
1796 file_ptr offset, maxoff;
1798 count = asect->lineno_count;
1800 if (strcmp (asect->name, ".text") != 0 || count == 0)
1803 size = count * coff_data (abfd)->local_linesz;
1804 info = (struct coff_symfile_info *) vpinfo;
1805 offset = asect->line_filepos;
1806 maxoff = offset + size;
1808 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1809 info->min_lineno_offset = offset;
1811 if (maxoff > info->max_lineno_offset)
1812 info->max_lineno_offset = maxoff;
1816 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1818 struct cleanup *old_chain;
1827 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1832 /* Read in all partial symtabs on which this one is dependent. */
1833 for (i = 0; i < pst->number_of_dependencies; i++)
1834 if (!pst->dependencies[i]->readin)
1836 /* Inform about additional files that need to be read in. */
1839 fputs_filtered (" ", gdb_stdout);
1841 fputs_filtered ("and ", gdb_stdout);
1843 printf_filtered ("%s...", pst->dependencies[i]->filename);
1844 wrap_here (""); /* Flush output */
1845 gdb_flush (gdb_stdout);
1847 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1850 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1852 /* Init stuff necessary for reading in symbols. */
1855 old_chain = make_cleanup (really_free_pendings, 0);
1857 read_xcoff_symtab (objfile, pst);
1859 do_cleanups (old_chain);
1865 /* Read in all of the symbols for a given psymtab for real.
1866 Be verbose about it if the user wants that. SELF is not NULL. */
1869 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1874 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1879 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1880 || self->number_of_dependencies)
1882 /* Print the message now, before reading the string table,
1883 to avoid disconcerting pauses. */
1886 printf_filtered ("Reading in symbols for %s...", self->filename);
1887 gdb_flush (gdb_stdout);
1890 next_symbol_text_func = xcoff_next_symbol_text;
1892 xcoff_psymtab_to_symtab_1 (objfile, self);
1894 /* Match with global symbols. This only needs to be done once,
1895 after all of the symtabs and dependencies have been read in. */
1896 scan_file_globals (objfile);
1898 /* Finish up the debug error message. */
1900 printf_filtered ("done.\n");
1905 xcoff_new_init (struct objfile *objfile)
1907 stabsread_new_init ();
1908 buildsym_new_init ();
1911 /* Do initialization in preparation for reading symbols from OBJFILE.
1913 We will only be called if this is an XCOFF or XCOFF-like file.
1914 BFD handles figuring out the format of the file, and code in symfile.c
1915 uses BFD's determination to vector to us. */
1918 xcoff_symfile_init (struct objfile *objfile)
1920 struct coff_symfile_info *xcoff;
1922 /* Allocate struct to keep track of the symfile. */
1923 xcoff = XNEW (struct coff_symfile_info);
1924 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1926 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1927 find this causes a significant slowdown in gdb then we could
1928 set it in the debug symbol readers only when necessary. */
1929 objfile->flags |= OBJF_REORDERED;
1932 /* Perform any local cleanups required when we are done with a particular
1933 objfile. I.E, we are in the process of discarding all symbol information
1934 for an objfile, freeing up all memory held for it, and unlinking the
1935 objfile struct from the global list of known objfiles. */
1938 xcoff_symfile_finish (struct objfile *objfile)
1940 /* Start with a fresh include table for the next objfile. */
1946 inclIndx = inclLength = inclDepth = 0;
1948 dwarf2_free_objfile (objfile);
1953 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1957 unsigned char lengthbuf[4];
1959 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1961 xcoff->strtbl = NULL;
1963 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1964 error (_("cannot seek to string table in %s: %s"),
1965 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1967 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1968 length = bfd_h_get_32 (abfd, lengthbuf);
1970 /* If no string table is needed, then the file may end immediately
1971 after the symbols. Just return with `strtbl' set to NULL. */
1973 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1976 /* Allocate string table from objfile_obstack. We will need this table
1977 as long as we have its symbol table around. */
1979 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1980 xcoff->strtbl = strtbl;
1982 /* Copy length buffer, the first byte is usually zero and is
1983 used for stabs with a name length of zero. */
1984 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1985 if (length == sizeof lengthbuf)
1988 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1990 if (val != length - sizeof lengthbuf)
1991 error (_("cannot read string table from %s: %s"),
1992 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1993 if (strtbl[length - 1] != '\0')
1994 error (_("bad symbol file: string table "
1995 "does not end with null character"));
2000 /* If we have not yet seen a function for this psymtab, this is 0. If we
2001 have seen one, it is the offset in the line numbers of the line numbers
2003 static unsigned int first_fun_line_offset;
2005 /* Allocate and partially fill a partial symtab. It will be
2006 completely filled at the end of the symbol list.
2008 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2009 is the address relative to which its symbols are (incremental) or 0
2012 static struct partial_symtab *
2013 xcoff_start_psymtab (struct objfile *objfile,
2014 const char *filename, int first_symnum,
2015 struct partial_symbol **global_syms,
2016 struct partial_symbol **static_syms)
2018 struct partial_symtab *result =
2019 start_psymtab_common (objfile, objfile->section_offsets,
2021 /* We fill in textlow later. */
2023 global_syms, static_syms);
2025 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2026 sizeof (struct symloc));
2027 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2028 result->read_symtab = xcoff_read_symtab;
2030 /* Deduce the source language from the filename for this psymtab. */
2031 psymtab_language = deduce_language_from_filename (filename);
2036 /* Close off the current usage of PST.
2037 Returns PST, or NULL if the partial symtab was empty and thrown away.
2039 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2041 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2042 are the information for includes and dependencies. */
2044 static struct partial_symtab *
2045 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2046 const char **include_list, int num_includes,
2047 int capping_symbol_number,
2048 struct partial_symtab **dependency_list,
2049 int number_dependencies, int textlow_not_set)
2053 if (capping_symbol_number != -1)
2054 ((struct symloc *) pst->read_symtab_private)->numsyms =
2055 capping_symbol_number
2056 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2057 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2058 first_fun_line_offset;
2059 first_fun_line_offset = 0;
2060 pst->n_global_syms = objfile->global_psymbols.next
2061 - (objfile->global_psymbols.list + pst->globals_offset);
2062 pst->n_static_syms = objfile->static_psymbols.next
2063 - (objfile->static_psymbols.list + pst->statics_offset);
2065 pst->number_of_dependencies = number_dependencies;
2066 if (number_dependencies)
2068 pst->dependencies = (struct partial_symtab **)
2069 obstack_alloc (&objfile->objfile_obstack,
2070 number_dependencies * sizeof (struct partial_symtab *));
2071 memcpy (pst->dependencies, dependency_list,
2072 number_dependencies * sizeof (struct partial_symtab *));
2075 pst->dependencies = 0;
2077 for (i = 0; i < num_includes; i++)
2079 struct partial_symtab *subpst =
2080 allocate_psymtab (include_list[i], objfile);
2082 subpst->section_offsets = pst->section_offsets;
2083 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2084 sizeof (struct symloc));
2085 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2086 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2087 subpst->textlow = 0;
2088 subpst->texthigh = 0;
2090 /* We could save slight bits of space by only making one of these,
2091 shared by the entire set of include files. FIXME-someday. */
2092 subpst->dependencies = (struct partial_symtab **)
2093 obstack_alloc (&objfile->objfile_obstack,
2094 sizeof (struct partial_symtab *));
2095 subpst->dependencies[0] = pst;
2096 subpst->number_of_dependencies = 1;
2098 subpst->globals_offset =
2099 subpst->n_global_syms =
2100 subpst->statics_offset =
2101 subpst->n_static_syms = 0;
2104 subpst->compunit_symtab = NULL;
2105 subpst->read_symtab = pst->read_symtab;
2108 sort_pst_symbols (objfile, pst);
2110 if (num_includes == 0
2111 && number_dependencies == 0
2112 && pst->n_global_syms == 0
2113 && pst->n_static_syms == 0)
2115 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2116 it is on the obstack, but we can forget to chain it on the list. */
2117 /* Empty psymtabs happen as a result of header files which don't have
2118 any symbols in them. There can be a lot of them. */
2120 discard_psymtab (objfile, pst);
2122 /* Indicate that psymtab was thrown away. */
2123 pst = (struct partial_symtab *) NULL;
2128 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2129 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2130 the symbol and its auxents. */
2133 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2134 const char **name, char **raw, unsigned int *symnump,
2135 struct objfile *objfile)
2137 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2138 if (symbol->n_zeroes)
2140 /* If it's exactly E_SYMNMLEN characters long it isn't
2142 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2144 /* FIXME: wastes memory for symbols which we don't end up putting
2145 into the minimal symbols. */
2148 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2149 strncpy (p, symbol->n_name, E_SYMNMLEN);
2150 p[E_SYMNMLEN] = '\0';
2154 /* Point to the unswapped name as that persists as long as the
2156 *name = ((struct external_syment *) *raw)->e.e_name;
2158 else if (symbol->n_sclass & 0x80)
2160 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2164 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2167 *raw += coff_data (objfile->obfd)->local_symesz;
2168 if (symbol->n_numaux > 0)
2170 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2171 symbol->n_sclass, 0, symbol->n_numaux, aux);
2173 *symnump += symbol->n_numaux;
2174 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2179 function_outside_compilation_unit_complaint (const char *arg1)
2181 complaint (&symfile_complaints,
2182 _("function `%s' appears to be defined "
2183 "outside of all compilation units"),
2188 scan_xcoff_symtab (struct objfile *objfile)
2190 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2191 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2192 const char *filestring = NULL;
2194 const char *namestring;
2195 int past_first_source_file = 0;
2200 /* Current partial symtab */
2201 struct partial_symtab *pst;
2203 /* List of current psymtab's include files. */
2204 const char **psymtab_include_list;
2205 int includes_allocated;
2208 /* Index within current psymtab dependency list. */
2209 struct partial_symtab **dependency_list;
2210 int dependencies_used, dependencies_allocated;
2213 struct internal_syment symbol;
2214 union internal_auxent main_aux[5];
2215 unsigned int ssymnum;
2217 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2218 CORE_ADDR last_csect_val = 0;
2219 int last_csect_sec = 0;
2220 int misc_func_recorded = 0; /* true if any misc. function. */
2221 int textlow_not_set = 1;
2223 pst = (struct partial_symtab *) 0;
2225 includes_allocated = 30;
2227 psymtab_include_list = (const char **) alloca (includes_allocated *
2228 sizeof (const char *));
2230 dependencies_allocated = 30;
2231 dependencies_used = 0;
2233 (struct partial_symtab **) alloca (dependencies_allocated *
2234 sizeof (struct partial_symtab *));
2236 set_last_source_file (NULL);
2238 abfd = objfile->obfd;
2239 next_symbol_text_func = xcoff_next_symbol_text;
2241 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2242 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2244 while (ssymnum < nsyms)
2250 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2251 sclass = symbol.n_sclass;
2258 /* The CSECT auxent--always the last auxent. */
2259 union internal_auxent csect_aux;
2260 unsigned int symnum_before = ssymnum;
2262 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2264 if (symbol.n_numaux > 1)
2266 bfd_coff_swap_aux_in
2268 sraw_symbol - coff_data (abfd)->local_symesz,
2271 symbol.n_numaux - 1,
2276 csect_aux = main_aux[0];
2278 /* If symbol name starts with ".$" or "$", ignore it. */
2279 if (namestring[0] == '$'
2280 || (namestring[0] == '.' && namestring[1] == '$'))
2283 switch (csect_aux.x_csect.x_smtyp & 0x7)
2286 switch (csect_aux.x_csect.x_smclas)
2289 if (last_csect_name)
2291 /* If no misc. function recorded in the last
2292 seen csect, enter it as a function. This
2293 will take care of functions like strcmp()
2296 if (!misc_func_recorded)
2298 record_minimal_symbol
2299 (last_csect_name, last_csect_val,
2300 mst_text, last_csect_sec, objfile);
2301 misc_func_recorded = 1;
2306 /* We have to allocate one psymtab for
2307 each program csect, because their text
2308 sections need not be adjacent. */
2310 (objfile, pst, psymtab_include_list,
2311 includes_used, symnum_before, dependency_list,
2312 dependencies_used, textlow_not_set);
2314 dependencies_used = 0;
2315 /* Give all psymtabs for this source file the same
2317 pst = xcoff_start_psymtab
2321 objfile->global_psymbols.next,
2322 objfile->static_psymbols.next);
2325 /* Activate the misc_func_recorded mechanism for
2326 compiler- and linker-generated CSECTs like ".strcmp"
2328 if (namestring && (namestring[0] == '.'
2329 || namestring[0] == '@'))
2331 last_csect_name = namestring;
2332 last_csect_val = symbol.n_value;
2333 last_csect_sec = symbol.n_scnum;
2338 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2340 if (highval > pst->texthigh)
2341 pst->texthigh = highval;
2342 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2343 pst->textlow = symbol.n_value;
2345 misc_func_recorded = 0;
2350 /* Data variables are recorded in the minimal symbol
2351 table, except for section symbols. */
2352 if (*namestring != '.')
2353 record_minimal_symbol
2354 (namestring, symbol.n_value,
2355 sclass == C_HIDEXT ? mst_file_data : mst_data,
2356 symbol.n_scnum, objfile);
2361 warning (_("More than one XMC_TC0 symbol found."));
2362 toc_offset = symbol.n_value;
2364 /* Make TOC offset relative to start address of
2366 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2368 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2372 /* These symbols tell us where the TOC entry for a
2373 variable is, not the variable itself. */
2382 switch (csect_aux.x_csect.x_smclas)
2385 /* A function entry point. */
2387 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2388 first_fun_line_offset =
2389 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2391 record_minimal_symbol
2392 (namestring, symbol.n_value,
2393 sclass == C_HIDEXT ? mst_file_text : mst_text,
2394 symbol.n_scnum, objfile);
2395 misc_func_recorded = 1;
2400 /* shared library function trampoline code entry
2403 /* record trampoline code entries as
2404 mst_solib_trampoline symbol. When we lookup mst
2405 symbols, we will choose mst_text over
2406 mst_solib_trampoline. */
2407 record_minimal_symbol
2408 (namestring, symbol.n_value,
2409 mst_solib_trampoline, symbol.n_scnum, objfile);
2410 misc_func_recorded = 1;
2414 /* The symbols often have the same names as
2415 debug symbols for functions, and confuse
2421 /* xlc puts each variable in a separate csect,
2422 so we get an XTY_SD for each variable. But
2423 gcc puts several variables in a csect, so
2424 that each variable only gets an XTY_LD. We
2425 still need to record them. This will
2426 typically be XMC_RW; I suspect XMC_RO and
2427 XMC_BS might be possible too. */
2428 if (*namestring != '.')
2429 record_minimal_symbol
2430 (namestring, symbol.n_value,
2431 sclass == C_HIDEXT ? mst_file_data : mst_data,
2432 symbol.n_scnum, objfile);
2438 switch (csect_aux.x_csect.x_smclas)
2442 /* Common variables are recorded in the minimal symbol
2443 table, except for section symbols. */
2444 if (*namestring != '.')
2445 record_minimal_symbol
2446 (namestring, symbol.n_value,
2447 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2448 symbol.n_scnum, objfile);
2460 unsigned int symnum_before;
2462 symnum_before = ssymnum;
2463 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2466 /* See if the last csect needs to be recorded. */
2468 if (last_csect_name && !misc_func_recorded)
2470 /* If no misc. function recorded in the last seen csect, enter
2471 it as a function. This will take care of functions like
2472 strcmp() compiled by xlc. */
2474 record_minimal_symbol (last_csect_name, last_csect_val,
2475 mst_text, last_csect_sec, objfile);
2476 misc_func_recorded = 1;
2481 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2482 includes_used, symnum_before,
2483 dependency_list, dependencies_used,
2486 dependencies_used = 0;
2488 first_fun_line_offset = 0;
2490 /* XCOFF, according to the AIX 3.2 documentation, puts the
2491 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2492 do things the standard COFF way and put it in the auxent.
2493 We use the auxent if the symbol is ".file" and an auxent
2494 exists, otherwise use the symbol itself. */
2495 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2497 filestring = coff_getfilename (&main_aux[0], objfile);
2500 filestring = namestring;
2502 pst = xcoff_start_psymtab (objfile,
2505 objfile->global_psymbols.next,
2506 objfile->static_psymbols.next);
2507 last_csect_name = NULL;
2513 complaint (&symfile_complaints,
2514 _("Storage class %d not recognized during scan"),
2519 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2520 to handle only the C_FUN and C_EXT. */
2535 /* C_EINCL means we are switching back to the main file. But there
2536 is no reason to care; the only thing we want to know about
2537 includes is the names of all the included (.h) files. */
2542 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2546 /* I don't think the name of the common block (as opposed to the
2547 variables within it) is something which is user visible
2555 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2556 so C_LSYM would appear to be only for locals. */
2562 /* We probably could save a few instructions by assuming that
2563 C_LSYM, C_PSYM, etc., never have auxents. */
2564 int naux1 = symbol.n_numaux + 1;
2567 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2573 /* Mark down an include file in the current psymtab. */
2574 enum language tmp_language;
2576 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2579 tmp_language = deduce_language_from_filename (namestring);
2581 /* Only change the psymtab's language if we've learned
2582 something useful (eg. tmp_language is not language_unknown).
2583 In addition, to match what start_subfile does, never change
2585 if (tmp_language != language_unknown
2586 && (tmp_language != language_c
2587 || psymtab_language != language_cplus))
2588 psymtab_language = tmp_language;
2590 /* In C++, one may expect the same filename to come round many
2591 times, when code is coming alternately from the main file
2592 and from inline functions in other files. So I check to see
2593 if this is a file we've seen before -- either the main
2594 source file, or a previously included file.
2596 This seems to be a lot of time to be spending on N_SOL, but
2597 things like "break c-exp.y:435" need to work (I
2598 suppose the psymtab_include_list could be hashed or put
2599 in a binary tree, if profiling shows this is a major hog). */
2600 if (pst && strcmp (namestring, pst->filename) == 0)
2606 for (i = 0; i < includes_used; i++)
2607 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2615 psymtab_include_list[includes_used++] = namestring;
2616 if (includes_used >= includes_allocated)
2618 const char **orig = psymtab_include_list;
2620 psymtab_include_list = (const char **)
2621 alloca ((includes_allocated *= 2) *
2622 sizeof (const char *));
2623 memcpy (psymtab_include_list, orig,
2624 includes_used * sizeof (const char *));
2629 /* The value of the C_FUN is not the address of the function (it
2630 appears to be the address before linking), but as long as it
2631 is smaller than the actual address, then find_pc_partial_function
2632 will use the minimal symbols instead. I hope. */
2641 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2644 p = strchr (namestring, ':');
2646 continue; /* Not a debugging symbol. */
2648 /* Main processing section for debugging symbols which
2649 the initial read through the symbol tables needs to worry
2650 about. If we reach this point, the symbol which we are
2651 considering is definitely one we are interested in.
2652 p must also contain the (valid) index into the namestring
2653 which indicates the debugging type symbol. */
2658 symbol.n_value += ANOFFSET (objfile->section_offsets,
2659 SECT_OFF_DATA (objfile));
2661 if (gdbarch_static_transform_name_p (gdbarch))
2662 namestring = gdbarch_static_transform_name
2663 (gdbarch, namestring);
2665 add_psymbol_to_list (namestring, p - namestring, 1,
2666 VAR_DOMAIN, LOC_STATIC,
2667 &objfile->static_psymbols,
2669 psymtab_language, objfile);
2673 symbol.n_value += ANOFFSET (objfile->section_offsets,
2674 SECT_OFF_DATA (objfile));
2675 /* The addresses in these entries are reported to be
2676 wrong. See the code that reads 'G's for symtabs. */
2677 add_psymbol_to_list (namestring, p - namestring, 1,
2678 VAR_DOMAIN, LOC_STATIC,
2679 &objfile->global_psymbols,
2681 psymtab_language, objfile);
2685 /* When a 'T' entry is defining an anonymous enum, it
2686 may have a name which is the empty string, or a
2687 single space. Since they're not really defining a
2688 symbol, those shouldn't go in the partial symbol
2689 table. We do pick up the elements of such enums at
2690 'check_enum:', below. */
2691 if (p >= namestring + 2
2692 || (p == namestring + 1
2693 && namestring[0] != ' '))
2695 add_psymbol_to_list (namestring, p - namestring, 1,
2696 STRUCT_DOMAIN, LOC_TYPEDEF,
2697 &objfile->static_psymbols,
2699 psymtab_language, objfile);
2702 /* Also a typedef with the same name. */
2703 add_psymbol_to_list (namestring, p - namestring, 1,
2704 VAR_DOMAIN, LOC_TYPEDEF,
2705 &objfile->static_psymbols,
2707 psymtab_language, objfile);
2714 if (p != namestring) /* a name is there, not just :T... */
2716 add_psymbol_to_list (namestring, p - namestring, 1,
2717 VAR_DOMAIN, LOC_TYPEDEF,
2718 &objfile->static_psymbols,
2720 psymtab_language, objfile);
2723 /* If this is an enumerated type, we need to
2724 add all the enum constants to the partial symbol
2725 table. This does not cover enums without names, e.g.
2726 "enum {a, b} c;" in C, but fortunately those are
2727 rare. There is no way for GDB to find those from the
2728 enum type without spending too much time on it. Thus
2729 to solve this problem, the compiler needs to put out the
2730 enum in a nameless type. GCC2 does this. */
2732 /* We are looking for something of the form
2733 <name> ":" ("t" | "T") [<number> "="] "e"
2734 {<constant> ":" <value> ","} ";". */
2736 /* Skip over the colon and the 't' or 'T'. */
2738 /* This type may be given a number. Also, numbers can come
2739 in pairs like (0,26). Skip over it. */
2740 while ((*p >= '0' && *p <= '9')
2741 || *p == '(' || *p == ',' || *p == ')'
2747 /* The aix4 compiler emits extra crud before the
2751 /* Skip over the type (?). */
2755 /* Skip over the colon. */
2759 /* We have found an enumerated type. */
2760 /* According to comments in read_enum_type
2761 a comma could end it instead of a semicolon.
2762 I don't know where that happens.
2764 while (*p && *p != ';' && *p != ',')
2768 /* Check for and handle cretinous dbx symbol name
2770 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2771 p = next_symbol_text (objfile);
2773 /* Point to the character after the name
2774 of the enum constant. */
2775 for (q = p; *q && *q != ':'; q++)
2777 /* Note that the value doesn't matter for
2778 enum constants in psymtabs, just in symtabs. */
2779 add_psymbol_to_list (p, q - p, 1,
2780 VAR_DOMAIN, LOC_CONST,
2781 &objfile->static_psymbols, 0,
2782 0, psymtab_language, objfile);
2783 /* Point past the name. */
2785 /* Skip over the value. */
2786 while (*p && *p != ',')
2788 /* Advance past the comma. */
2796 /* Constant, e.g. from "const" in Pascal. */
2797 add_psymbol_to_list (namestring, p - namestring, 1,
2798 VAR_DOMAIN, LOC_CONST,
2799 &objfile->static_psymbols, symbol.n_value,
2800 0, psymtab_language, objfile);
2806 int name_len = p - namestring;
2807 char *name = xmalloc (name_len + 1);
2809 memcpy (name, namestring, name_len);
2810 name[name_len] = '\0';
2811 function_outside_compilation_unit_complaint (name);
2814 symbol.n_value += ANOFFSET (objfile->section_offsets,
2815 SECT_OFF_TEXT (objfile));
2816 add_psymbol_to_list (namestring, p - namestring, 1,
2817 VAR_DOMAIN, LOC_BLOCK,
2818 &objfile->static_psymbols,
2820 psymtab_language, objfile);
2823 /* Global functions were ignored here, but now they
2824 are put into the global psymtab like one would expect.
2825 They're also in the minimal symbol table. */
2829 int name_len = p - namestring;
2830 char *name = xmalloc (name_len + 1);
2832 memcpy (name, namestring, name_len);
2833 name[name_len] = '\0';
2834 function_outside_compilation_unit_complaint (name);
2838 /* We need only the minimal symbols for these
2839 loader-generated definitions. Keeping the global
2840 symbols leads to "in psymbols but not in symbols"
2842 if (strncmp (namestring, "@FIX", 4) == 0)
2845 symbol.n_value += ANOFFSET (objfile->section_offsets,
2846 SECT_OFF_TEXT (objfile));
2847 add_psymbol_to_list (namestring, p - namestring, 1,
2848 VAR_DOMAIN, LOC_BLOCK,
2849 &objfile->global_psymbols,
2851 psymtab_language, objfile);
2854 /* Two things show up here (hopefully); static symbols of
2855 local scope (static used inside braces) or extensions
2856 of structure symbols. We can ignore both. */
2870 case '#': /* For symbol identification (used in
2875 /* It is a C++ nested symbol. We don't need to record it
2876 (I don't think); if we try to look up foo::bar::baz,
2877 then symbols for the symtab containing foo should get
2878 read in, I think. */
2879 /* Someone says sun cc puts out symbols like
2880 /foo/baz/maclib::/usr/local/bin/maclib,
2881 which would get here with a symbol type of ':'. */
2885 /* Unexpected symbol descriptor. The second and
2886 subsequent stabs of a continued stab can show up
2887 here. The question is whether they ever can mimic
2888 a normal stab--it would be nice if not, since we
2889 certainly don't want to spend the time searching to
2890 the end of every string looking for a
2893 complaint (&symfile_complaints,
2894 _("unknown symbol descriptor `%c'"), p[1]);
2896 /* Ignore it; perhaps it is an extension that we don't
2906 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2907 ssymnum, dependency_list,
2908 dependencies_used, textlow_not_set);
2911 /* Record the toc offset value of this symbol table into objfile
2912 structure. If no XMC_TC0 is found, toc_offset should be zero.
2913 Another place to obtain this information would be file auxiliary
2916 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2919 /* Return the toc offset value for a given objfile. */
2922 xcoff_get_toc_offset (struct objfile *objfile)
2925 return XCOFF_DATA (objfile)->toc_offset;
2929 /* Scan and build partial symbols for a symbol file.
2930 We have been initialized by a call to dbx_symfile_init, which
2931 put all the relevant info into a "struct dbx_symfile_info",
2932 hung off the objfile structure.
2934 SECTION_OFFSETS contains offsets relative to which the symbols in the
2935 various sections are (depending where the sections were actually
2939 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2943 struct cleanup *back_to;
2944 int num_symbols; /* # of symbols */
2945 file_ptr symtab_offset; /* symbol table and */
2946 file_ptr stringtab_offset; /* string table file offsets */
2947 struct coff_symfile_info *info;
2951 info = XCOFF_DATA (objfile);
2952 symfile_bfd = abfd = objfile->obfd;
2953 name = objfile_name (objfile);
2955 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2956 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2957 stringtab_offset = symtab_offset +
2958 num_symbols * coff_data (abfd)->local_symesz;
2960 info->min_lineno_offset = 0;
2961 info->max_lineno_offset = 0;
2962 bfd_map_over_sections (abfd, find_linenos, info);
2964 if (num_symbols > 0)
2966 /* Read the string table. */
2967 init_stringtab (abfd, stringtab_offset, objfile);
2969 /* Read the .debug section, if present. */
2971 struct bfd_section *secp;
2972 bfd_size_type length;
2973 bfd_byte *debugsec = NULL;
2975 secp = bfd_get_section_by_name (abfd, ".debug");
2978 length = bfd_section_size (abfd, secp);
2981 debugsec = obstack_alloc (&objfile->objfile_obstack, length);
2983 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2985 error (_("Error reading .debug section of `%s': %s"),
2986 name, bfd_errmsg (bfd_get_error ()));
2990 info->debugsec = (char *) debugsec;
2994 /* Read the symbols. We keep them in core because we will want to
2995 access them randomly in read_symbol*. */
2996 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2998 error (_("Error reading symbols from %s: %s"),
2999 name, bfd_errmsg (bfd_get_error ()));
3000 size = coff_data (abfd)->local_symesz * num_symbols;
3001 info->symtbl = obstack_alloc (&objfile->objfile_obstack, size);
3002 info->symtbl_num_syms = num_symbols;
3004 val = bfd_bread (info->symtbl, size, abfd);
3006 perror_with_name (_("reading symbol table"));
3008 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3009 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3010 /* I'm not sure how how good num_symbols is; the rule of thumb in
3011 init_psymbol_list was developed for a.out. On the one hand,
3012 num_symbols includes auxents. On the other hand, it doesn't
3014 init_psymbol_list (objfile, num_symbols);
3016 free_pending_blocks ();
3017 back_to = make_cleanup (really_free_pendings, 0);
3019 init_minimal_symbol_collection ();
3020 make_cleanup_discard_minimal_symbols ();
3022 /* Now that the symbol table data of the executable file are all in core,
3023 process them and define symbols accordingly. */
3025 scan_xcoff_symtab (objfile);
3027 /* Install any minimal symbols that have been collected as the current
3028 minimal symbols for this objfile. */
3030 install_minimal_symbols (objfile);
3032 /* DWARF2 sections. */
3034 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3035 dwarf2_build_psymtabs (objfile);
3037 dwarf2_build_frame_info (objfile);
3039 do_cleanups (back_to);
3043 xcoff_symfile_offsets (struct objfile *objfile,
3044 const struct section_addr_info *addrs)
3046 const char *first_section_name;
3048 default_symfile_offsets (objfile, addrs);
3050 /* Oneof the weird side-effects of default_symfile_offsets is that
3051 it sometimes sets some section indices to zero for sections that,
3052 in fact do not exist. See the body of default_symfile_offsets
3053 for more info on when that happens. Undo that, as this then allows
3054 us to test whether the associated section exists or not, and then
3055 access it quickly (without searching it again). */
3057 if (objfile->num_sections == 0)
3058 return; /* Is that even possible? Better safe than sorry. */
3061 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3063 if (objfile->sect_index_text == 0
3064 && strcmp (first_section_name, ".text") != 0)
3065 objfile->sect_index_text = -1;
3067 if (objfile->sect_index_data == 0
3068 && strcmp (first_section_name, ".data") != 0)
3069 objfile->sect_index_data = -1;
3071 if (objfile->sect_index_bss == 0
3072 && strcmp (first_section_name, ".bss") != 0)
3073 objfile->sect_index_bss = -1;
3075 if (objfile->sect_index_rodata == 0
3076 && strcmp (first_section_name, ".rodata") != 0)
3077 objfile->sect_index_rodata = -1;
3080 /* Register our ability to parse symbols for xcoff BFD files. */
3082 static const struct sym_fns xcoff_sym_fns =
3085 /* It is possible that coff and xcoff should be merged as
3086 they do have fundamental similarities (for example, the extra storage
3087 classes used for stabs could presumably be recognized in any COFF file).
3088 However, in addition to obvious things like all the csect hair, there are
3089 some subtler differences between xcoffread.c and coffread.c, notably
3090 the fact that coffread.c has no need to read in all the symbols, but
3091 xcoffread.c reads all the symbols and does in fact randomly access them
3092 (in C_BSTAT and line number processing). */
3094 xcoff_new_init, /* init anything gbl to entire symtab */
3095 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3096 xcoff_initial_scan, /* read a symbol file into symtab */
3097 NULL, /* sym_read_psymbols */
3098 xcoff_symfile_finish, /* finished with file, cleanup */
3099 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3100 default_symfile_segments, /* Get segment information from a file. */
3101 aix_process_linenos,
3102 default_symfile_relocate, /* Relocate a debug section. */
3103 NULL, /* sym_probe_fns */
3107 /* Same as xcoff_get_n_import_files, but for core files. */
3110 xcoff_get_core_n_import_files (bfd *abfd)
3112 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3114 file_ptr offset = 0;
3118 return -1; /* Not a core file. */
3120 for (offset = 0; offset < bfd_get_section_size (sect);)
3126 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3128 next = bfd_get_32 (abfd, buf);
3130 break; /* This is the last entry. */
3134 /* Return the number of entries, excluding the first one, which is
3135 the path to the executable that produced this core file. */
3136 return n_entries - 1;
3139 /* Return the number of import files (shared libraries) that the given
3140 BFD depends on. Return -1 if this number could not be computed. */
3143 xcoff_get_n_import_files (bfd *abfd)
3145 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3149 /* If the ".loader" section does not exist, the objfile is probably
3150 not an executable. Might be a core file... */
3152 return xcoff_get_core_n_import_files (abfd);
3154 /* The number of entries in the Import Files Table is stored in
3155 field l_nimpid. This field is always at offset 16, and is
3156 always 4 bytes long. Read those 4 bytes. */
3158 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3160 l_nimpid = bfd_get_32 (abfd, buf);
3162 /* By convention, the first entry is the default LIBPATH value
3163 to be used by the system loader, so it does not count towards
3164 the number of import files. */
3165 return l_nimpid - 1;
3168 /* Free the per-objfile xcoff data. */
3171 xcoff_free_info (struct objfile *objfile, void *arg)
3176 /* Provide a prototype to silence -Wmissing-prototypes. */
3177 extern initialize_file_ftype _initialize_xcoffread;
3180 _initialize_xcoffread (void)
3182 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3184 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,