1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2019 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. */
44 #include "buildsym-legacy.h"
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_loclists */
163 /* AIX XCOFF defines one, named DWARF section for macro debug information.
164 XLC does not generate debug_macinfo for DWARF4 and below.
165 The section is assigned to debug_macro for DWARF5 and above. */
169 { NULL, NULL }, /* debug_line_str */
170 { ".dwrnges", NULL },
171 { NULL, NULL }, /* debug_rnglists */
172 { ".dwpbtyp", NULL },
173 { NULL, NULL }, /* debug_addr */
174 { ".dwframe", NULL },
175 { NULL, NULL }, /* eh_frame */
176 { NULL, NULL }, /* gdb_index */
177 { NULL, NULL }, /* debug_names */
178 { NULL, NULL }, /* debug_aranges */
183 bf_notfound_complaint (void)
185 complaint (_("line numbers off, `.bf' symbol not found"));
189 ef_complaint (int arg1)
191 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
195 eb_complaint (int arg1)
197 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
200 static void xcoff_initial_scan (struct objfile *, symfile_add_flags);
202 static void scan_xcoff_symtab (minimal_symbol_reader &,
205 static const char *xcoff_next_symbol_text (struct objfile *);
207 static void record_include_begin (struct coff_symbol *);
210 enter_line_range (struct subfile *, unsigned, unsigned,
211 CORE_ADDR, CORE_ADDR, unsigned *);
213 static void init_stringtab (bfd *, file_ptr, struct objfile *);
215 static void xcoff_symfile_init (struct objfile *);
217 static void xcoff_new_init (struct objfile *);
219 static void xcoff_symfile_finish (struct objfile *);
221 static char *coff_getfilename (union internal_auxent *, struct objfile *);
223 static void read_symbol (struct internal_syment *, int);
225 static int read_symbol_lineno (int);
227 static CORE_ADDR read_symbol_nvalue (int);
229 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
232 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
235 static void add_stab_to_list (char *, struct pending_stabs **);
238 static int compare_lte (const void *, const void *);
240 static struct linetable *arrange_linetable (struct linetable *);
242 static void record_include_end (struct coff_symbol *);
244 static void process_linenos (CORE_ADDR, CORE_ADDR);
247 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
249 static int secnum_to_section (int, struct objfile *);
250 static asection *secnum_to_bfd_section (int, struct objfile *);
252 struct find_targ_sec_arg
257 struct objfile *objfile;
260 static void find_targ_sec (bfd *, asection *, void *);
263 find_targ_sec (bfd *abfd, asection *sect, void *obj)
265 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
266 struct objfile *objfile = args->objfile;
268 if (sect->target_index == args->targ_index)
270 /* This is the section. Figure out what SECT_OFF_* code it is. */
271 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
272 *args->resultp = SECT_OFF_TEXT (objfile);
273 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
274 *args->resultp = SECT_OFF_DATA (objfile);
276 *args->resultp = gdb_bfd_section_index (abfd, sect);
277 *args->bfd_sect = sect;
281 /* Search all BFD sections for the section whose target_index is
282 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
283 associated index in the objfile's section_offset table is also
286 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
287 is set to the text section's number. */
290 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
291 asection **bfd_sect, int *secnum)
293 struct find_targ_sec_arg args;
295 args.targ_index = n_scnum;
296 args.resultp = secnum;
297 args.bfd_sect = bfd_sect;
298 args.objfile = objfile;
301 *secnum = SECT_OFF_TEXT (objfile);
303 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
306 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
309 secnum_to_section (int n_scnum, struct objfile *objfile)
314 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
318 /* Return the BFD section that N_SCNUM points to. */
321 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
326 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
330 /* add a given stab string into given stab vector. */
335 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
337 if (*stabvector == NULL)
339 *stabvector = (struct pending_stabs *)
340 xmalloc (sizeof (struct pending_stabs) +
341 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
342 (*stabvector)->count = 0;
343 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
345 else if ((*stabvector)->count >= (*stabvector)->length)
347 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
348 *stabvector = (struct pending_stabs *)
349 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
350 (*stabvector)->length * sizeof (char *));
352 (*stabvector)->stab[(*stabvector)->count++] = stabname;
357 /* Linenos are processed on a file-by-file basis.
361 1) xlc (IBM's native c compiler) postpones static function code
362 emission to the end of a compilation unit. This way it can
363 determine if those functions (statics) are needed or not, and
364 can do some garbage collection (I think). This makes line
365 numbers and corresponding addresses unordered, and we end up
366 with a line table like:
383 and that breaks gdb's binary search on line numbers, if the
384 above table is not sorted on line numbers. And that sort
385 should be on function based, since gcc can emit line numbers
388 10 0x100 - for the init/test part of a for stmt.
391 10 0x400 - for the increment part of a for stmt.
393 arrange_linetable() will do this sorting.
395 2) aix symbol table might look like:
397 c_file // beginning of a new file
398 .bi // beginning of include file
399 .ei // end of include file
403 basically, .bi/.ei pairs do not necessarily encapsulate
404 their scope. They need to be recorded, and processed later
405 on when we come the end of the compilation unit.
406 Include table (inclTable) and process_linenos() handle
412 /* compare line table entry addresses. */
415 compare_lte (const void *lte1p, const void *lte2p)
417 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
418 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
420 return lte1->pc - lte2->pc;
423 /* Given a line table with function entries are marked, arrange its
424 functions in ascending order and strip off function entry markers
425 and return it in a newly created table. If the old one is good
426 enough, return the old one. */
427 /* FIXME: I think all this stuff can be replaced by just passing
428 sort_linevec = 1 to end_symtab. */
430 static struct linetable *
431 arrange_linetable (struct linetable *oldLineTb)
433 int ii, jj, newline, /* new line count */
434 function_count; /* # of functions */
436 struct linetable_entry *fentry; /* function entry vector */
437 int fentry_size; /* # of function entries */
438 struct linetable *newLineTb; /* new line table */
441 #define NUM_OF_FUNCTIONS 20
443 fentry_size = NUM_OF_FUNCTIONS;
444 fentry = XNEWVEC (struct linetable_entry, fentry_size);
446 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
448 if (oldLineTb->item[ii].line == 0)
449 { /* Function entry found. */
450 if (function_count >= fentry_size)
451 { /* Make sure you have room. */
453 fentry = (struct linetable_entry *)
455 fentry_size * sizeof (struct linetable_entry));
457 fentry[function_count].line = ii;
458 fentry[function_count].pc = oldLineTb->item[ii].pc;
461 /* If the function was compiled with XLC, we may have to add an
462 extra line entry later. Reserve space for that. */
463 if (ii + 1 < oldLineTb->nitems
464 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
469 if (function_count == 0)
474 else if (function_count > 1)
475 qsort (fentry, function_count,
476 sizeof (struct linetable_entry), compare_lte);
478 /* Allocate a new line table. */
479 newLineTb = (struct linetable *)
481 (sizeof (struct linetable) +
482 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
484 /* If line table does not start with a function beginning, copy up until
488 if (oldLineTb->item[0].line != 0)
490 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
491 newLineTb->item[newline] = oldLineTb->item[newline];
493 /* Now copy function lines one by one. */
495 for (ii = 0; ii < function_count; ++ii)
497 /* If the function was compiled with XLC, we may have to add an
498 extra line to cover the function prologue. */
499 jj = fentry[ii].line;
500 if (jj + 1 < oldLineTb->nitems
501 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
503 newLineTb->item[newline] = oldLineTb->item[jj];
504 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
508 for (jj = fentry[ii].line + 1;
509 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
511 newLineTb->item[newline] = oldLineTb->item[jj];
514 /* The number of items in the line table must include these
515 extra lines which were added in case of XLC compiled functions. */
516 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
520 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
521 following `IncludeChain'. At the end of each symtab (end_symtab),
522 we will determine if we should create additional symtab's to
523 represent if (the include files. */
526 typedef struct _inclTable
528 char *name; /* include filename */
530 /* Offsets to the line table. end points to the last entry which is
531 part of this include file. */
534 struct subfile *subfile;
535 unsigned funStartLine; /* Start line # of its function. */
539 #define INITIAL_INCLUDE_TABLE_LENGTH 20
540 static InclTable *inclTable; /* global include table */
541 static int inclIndx; /* last entry to table */
542 static int inclLength; /* table length */
543 static int inclDepth; /* nested include depth */
545 static void allocate_include_entry (void);
548 record_include_begin (struct coff_symbol *cs)
552 /* In xcoff, we assume include files cannot be nested (not in .c files
553 of course, but in corresponding .s files.). */
555 /* This can happen with old versions of GCC.
556 GCC 2.3.3-930426 does not exhibit this on a test case which
557 a user said produced the message for him. */
558 complaint (_("Nested C_BINCL symbols"));
562 allocate_include_entry ();
564 inclTable[inclIndx].name = cs->c_name;
565 inclTable[inclIndx].begin = cs->c_value;
569 record_include_end (struct coff_symbol *cs)
575 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
578 allocate_include_entry ();
580 pTbl = &inclTable[inclIndx];
581 pTbl->end = cs->c_value;
588 allocate_include_entry (void)
590 if (inclTable == NULL)
592 inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
593 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
596 else if (inclIndx >= inclLength)
598 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
599 inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
600 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
601 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
605 /* Global variable to pass the psymtab down to all the routines involved
606 in psymtab to symtab processing. */
607 static struct partial_symtab *this_symtab_psymtab;
609 /* Objfile related to this_symtab_psymtab; set at the same time. */
610 static struct objfile *this_symtab_objfile;
612 /* given the start and end addresses of a compilation unit (or a csect,
613 at times) process its lines and create appropriate line vectors. */
616 process_linenos (CORE_ADDR start, CORE_ADDR end)
620 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
622 /* subfile structure for the main compilation unit. */
623 struct subfile main_subfile;
625 /* In the main source file, any time we see a function entry, we
626 reset this variable to function's absolute starting line number.
627 All the following line numbers in the function are relative to
628 this, and we record absolute line numbers in record_line(). */
630 unsigned int main_source_baseline = 0;
635 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
637 goto return_after_cleanup;
639 memset (&main_subfile, '\0', sizeof (main_subfile));
642 /* All source lines were in the main source file. None in include
645 enter_line_range (&main_subfile, offset, 0, start, end,
646 &main_source_baseline);
650 /* There was source with line numbers in include files. */
653 coff_data (this_symtab_objfile->obfd)->local_linesz;
654 main_source_baseline = 0;
656 for (ii = 0; ii < inclIndx; ++ii)
658 struct subfile *tmpSubfile;
660 /* If there is main file source before include file, enter it. */
661 if (offset < inclTable[ii].begin)
664 (&main_subfile, offset, inclTable[ii].begin - linesz,
665 start, 0, &main_source_baseline);
668 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
670 /* The entry in the include table refers to the main source
671 file. Add the lines to the main subfile. */
673 main_source_baseline = inclTable[ii].funStartLine;
675 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
676 start, 0, &main_source_baseline);
677 inclTable[ii].subfile = &main_subfile;
681 /* Have a new subfile for the include file. */
683 tmpSubfile = inclTable[ii].subfile = XNEW (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 struct subfile *current_subfile = get_current_subfile ();
717 lineTb = arrange_linetable (lv);
720 current_subfile->line_vector = (struct linetable *)
721 xrealloc (lv, (sizeof (struct linetable)
722 + lv->nitems * sizeof (struct linetable_entry)));
727 current_subfile->line_vector = lineTb;
730 current_subfile->line_vector_length =
731 current_subfile->line_vector->nitems;
734 /* Now, process included files' line numbers. */
736 for (ii = 0; ii < inclIndx; ++ii)
738 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
739 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
742 struct linetable *lineTb, *lv;
744 lv = (inclTable[ii].subfile)->line_vector;
746 /* Line numbers are not necessarily ordered. xlc compilation will
747 put static function to the end. */
749 lineTb = arrange_linetable (lv);
753 /* For the same include file, we might want to have more than one
754 subfile. This happens if we have something like:
762 while foo.h including code in it. (stupid but possible)
763 Since start_subfile() looks at the name and uses an
764 existing one if finds, we need to provide a fake name and
768 start_subfile (inclTable[ii].name);
771 /* Pick a fake name that will produce the same results as this
772 one when passed to deduce_language_from_filename. Kludge on
774 const char *fakename = strrchr (inclTable[ii].name, '.');
776 if (fakename == NULL)
778 start_subfile (fakename);
779 xfree (get_current_subfile ()->name);
781 struct subfile *current_subfile = get_current_subfile ();
782 current_subfile->name = xstrdup (inclTable[ii].name);
787 current_subfile->line_vector =
788 (struct linetable *) xrealloc
789 (lv, (sizeof (struct linetable)
790 + lv->nitems * sizeof (struct linetable_entry)));
796 current_subfile->line_vector = lineTb;
799 current_subfile->line_vector_length =
800 current_subfile->line_vector->nitems;
801 start_subfile (pop_subfile ());
805 return_after_cleanup:
807 /* We don't want to keep alloc/free'ing the global include file table. */
812 aix_process_linenos (struct objfile *objfile)
814 /* There is no linenos to read if there are only dwarf info. */
815 if (this_symtab_psymtab == NULL)
818 /* Process line numbers and enter them into line vector. */
819 process_linenos (get_last_source_start_addr (), cur_src_end_addr);
823 /* Enter a given range of lines into the line vector.
824 can be called in the following two ways:
825 enter_line_range (subfile, beginoffset, endoffset,
826 startaddr, 0, firstLine) or
827 enter_line_range (subfile, beginoffset, 0,
828 startaddr, endaddr, firstLine)
830 endoffset points to the last line table entry that we should pay
834 enter_line_range (struct subfile *subfile, unsigned beginoffset,
835 unsigned endoffset, /* offsets to line table */
836 CORE_ADDR startaddr, /* offsets to line table */
837 CORE_ADDR endaddr, unsigned *firstLine)
839 struct objfile *objfile = this_symtab_objfile;
840 struct gdbarch *gdbarch = get_objfile_arch (objfile);
841 unsigned int curoffset;
844 struct internal_lineno int_lnno;
845 unsigned int limit_offset;
849 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
851 curoffset = beginoffset;
852 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
856 if (endoffset >= limit_offset)
858 complaint (_("Bad line table offset in C_EINCL directive"));
861 limit_offset = endoffset;
866 abfd = objfile->obfd;
867 linesz = coff_data (abfd)->local_linesz;
868 ext_lnno = alloca (linesz);
870 while (curoffset <= limit_offset)
872 bfd_seek (abfd, curoffset, SEEK_SET);
873 bfd_bread (ext_lnno, linesz, abfd);
874 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
876 /* Find the address this line represents. */
877 addr = (int_lnno.l_lnno
878 ? int_lnno.l_addr.l_paddr
879 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
880 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
882 if (addr < startaddr || (endaddr && addr >= endaddr))
885 if (int_lnno.l_lnno == 0)
887 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
888 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
892 record_line (subfile, *firstLine + int_lnno.l_lnno,
893 gdbarch_addr_bits_remove (gdbarch, addr));
899 /* Save the vital information for use when closing off the current file.
900 NAME is the file name the symbols came from, START_ADDR is the first
901 text address for the file, and SIZE is the number of bytes of text. */
903 #define complete_symtab(name, start_addr) { \
904 set_last_source_file (name); \
905 set_last_source_start_addr (start_addr); \
909 /* Refill the symbol table input buffer
910 and set the variables that control fetching entries from it.
911 Reports an error if no data available.
912 This function can read past the end of the symbol table
913 (into the string table) but this does no harm. */
915 /* Create a new minimal symbol (using record_with_info).
917 Creation of all new minimal symbols should go through this function
918 rather than calling the various record functions in order
919 to make sure that all symbol addresses get properly relocated.
923 NAME - the symbol's name (but if NAME starts with a period, that
924 leading period is discarded).
925 ADDRESS - the symbol's address, prior to relocation. This function
926 relocates the address before recording the minimal symbol.
927 MS_TYPE - the symbol's type.
928 N_SCNUM - the symbol's XCOFF section number.
929 OBJFILE - the objfile associated with the minimal symbol. */
932 record_minimal_symbol (minimal_symbol_reader &reader,
933 const char *name, CORE_ADDR address,
934 enum minimal_symbol_type ms_type,
936 struct objfile *objfile)
941 reader.record_with_info (name, address, ms_type,
942 secnum_to_section (n_scnum, objfile));
945 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
946 nested. At any given time, a symbol can only be in one static block.
947 This is the base address of current static block, zero if non exists. */
949 static int static_block_base = 0;
951 /* Section number for the current static block. */
953 static int static_block_section = -1;
955 /* true if space for symbol name has been allocated. */
957 static int symname_alloced = 0;
959 /* Next symbol to read. Pointer into raw seething symbol table. */
961 static char *raw_symbol;
963 /* This is the function which stabsread.c calls to get symbol
967 xcoff_next_symbol_text (struct objfile *objfile)
969 struct internal_syment symbol;
972 /* FIXME: is this the same as the passed arg? */
973 if (this_symtab_objfile)
974 objfile = this_symtab_objfile;
976 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
979 complaint (_("Unexpected symbol continuation"));
981 /* Return something which points to '\0' and hope the symbol reading
982 code does something reasonable. */
985 else if (symbol.n_sclass & 0x80)
987 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
988 raw_symbol += coff_data (objfile->obfd)->local_symesz;
993 complaint (_("Unexpected symbol continuation"));
995 /* Return something which points to '\0' and hope the symbol reading
996 code does something reasonable. */
1002 /* Read symbols for a given partial symbol table. */
1005 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1007 bfd *abfd = objfile->obfd;
1008 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1009 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1010 char *strtbl = xcoff->strtbl;
1011 char *debugsec = xcoff->debugsec;
1012 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1014 struct internal_syment symbol[1];
1015 union internal_auxent main_aux;
1016 struct coff_symbol cs[1];
1017 CORE_ADDR file_start_addr = 0;
1018 CORE_ADDR file_end_addr = 0;
1020 int next_file_symnum = -1;
1021 unsigned int max_symnum;
1022 int just_started = 1;
1024 CORE_ADDR fcn_start_addr = 0;
1025 enum language pst_symtab_language;
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 const char *filestring = pst->filename; /* 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;
1046 pst_symtab_language = deduce_language_from_filename (filestring);
1049 start_symtab (objfile, filestring, (char *) NULL, file_start_addr,
1050 pst_symtab_language);
1051 record_debugformat (debugfmt);
1052 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1054 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1055 first_object_file_end = 0;
1057 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1059 while (symnum < max_symnum)
1061 QUIT; /* make this command interruptable. */
1063 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1064 /* read one symbol into `cs' structure. After processing the
1065 whole symbol table, only string table will be kept in memory,
1066 symbol table and debug section of xcoff will be freed. Thus
1067 we can mark symbols with names in string table as
1072 /* Swap and align the symbol into a reasonable C structure. */
1073 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1075 cs->c_symnum = symnum;
1076 cs->c_naux = symbol->n_numaux;
1077 if (symbol->n_zeroes)
1079 symname_alloced = 0;
1080 /* We must use the original, unswapped, name here so the name field
1081 pointed to by cs->c_name will persist throughout xcoffread. If
1082 we use the new field, it gets overwritten for each symbol. */
1083 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1084 /* If it's exactly E_SYMNMLEN characters long it isn't
1086 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1090 p = (char *) obstack_alloc (&objfile->objfile_obstack,
1092 strncpy (p, cs->c_name, E_SYMNMLEN);
1093 p[E_SYMNMLEN] = '\0';
1095 symname_alloced = 1;
1098 else if (symbol->n_sclass & 0x80)
1100 cs->c_name = debugsec + symbol->n_offset;
1101 symname_alloced = 0;
1105 /* in string table */
1106 cs->c_name = strtbl + (int) symbol->n_offset;
1107 symname_alloced = 1;
1109 cs->c_value = symbol->n_value;
1110 cs->c_sclass = symbol->n_sclass;
1111 cs->c_secnum = symbol->n_scnum;
1112 cs->c_type = (unsigned) symbol->n_type;
1114 raw_symbol += local_symesz;
1117 /* Save addr of first aux entry. */
1118 raw_auxptr = raw_symbol;
1120 /* Skip all the auxents associated with this symbol. */
1121 for (ii = symbol->n_numaux; ii; --ii)
1123 raw_symbol += coff_data (abfd)->local_auxesz;
1128 /* if symbol name starts with ".$" or "$", ignore it. */
1129 if (cs->c_name[0] == '$'
1130 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1133 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1135 if (get_last_source_file ())
1137 pst->compunit_symtab = end_symtab (cur_src_end_addr,
1138 SECT_OFF_TEXT (objfile));
1143 start_symtab (objfile, "_globals_", (char *) NULL,
1144 (CORE_ADDR) 0, pst_symtab_language);
1145 record_debugformat (debugfmt);
1146 cur_src_end_addr = first_object_file_end;
1147 /* Done with all files, everything from here on is globals. */
1150 if (cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT ||
1151 cs->c_sclass == C_WEAKEXT)
1153 /* Dealing with a symbol with a csect entry. */
1155 #define CSECT(PP) ((PP)->x_csect)
1156 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1157 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1158 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1159 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1161 /* Convert the auxent to something we can access.
1162 XCOFF can have more than one auxiliary entries.
1164 Actual functions will have two auxiliary entries, one to have the
1165 function size and other to have the smtype/smclass (LD/PR).
1167 c_type value of main symbol table will be set only in case of
1168 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1169 Bit 10 of type is set if symbol is a function, ie the value is set
1170 to 32(0x20). So we need to read the first function auxiliay entry
1171 which contains the size. */
1172 if (cs->c_naux > 1 && ISFCN (cs->c_type))
1174 /* a function entry point. */
1176 fcn_start_addr = cs->c_value;
1178 /* save the function header info, which will be used
1179 when `.bf' is seen. */
1182 /* Convert the auxent to something we can access. */
1183 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1184 0, cs->c_naux, &fcn_aux_saved);
1187 /* Read the csect auxiliary header, which is always the last by
1189 bfd_coff_swap_aux_in (abfd,
1191 + ((coff_data (abfd)->local_symesz)
1192 * (cs->c_naux - 1)),
1193 cs->c_type, cs->c_sclass,
1194 cs->c_naux - 1, cs->c_naux,
1197 switch (CSECT_SMTYP (&main_aux))
1201 /* Ignore all external references. */
1205 /* A section description. */
1207 switch (CSECT_SCLAS (&main_aux))
1213 /* A program csect is seen. We have to allocate one
1214 symbol table for each program csect. Normally gdb
1215 prefers one symtab for each source file. In case
1216 of AIX, one source file might include more than one
1217 [PR] csect, and they don't have to be adjacent in
1218 terms of the space they occupy in memory. Thus, one
1219 single source file might get fragmented in the
1220 memory and gdb's file start and end address
1221 approach does not work! GCC (and I think xlc) seem
1222 to put all the code in the unnamed program csect. */
1224 if (last_csect_name)
1226 complete_symtab (filestring, file_start_addr);
1227 cur_src_end_addr = file_end_addr;
1228 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1231 /* Give all csects for this source file the same
1233 start_symtab (objfile, filestring, NULL,
1234 (CORE_ADDR) 0, pst_symtab_language);
1235 record_debugformat (debugfmt);
1238 /* If this is the very first csect seen,
1239 basically `__start'. */
1242 first_object_file_end
1243 = cs->c_value + CSECT_LEN (&main_aux);
1248 cs->c_value + ANOFFSET (objfile->section_offsets,
1249 SECT_OFF_TEXT (objfile));
1250 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1252 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1253 last_csect_name = cs->c_name;
1257 /* All other symbols are put into the minimal symbol
1270 /* Ignore the symbol. */
1278 switch (CSECT_SCLAS (&main_aux))
1280 /* We never really come to this part as this case has been
1281 handled in ISFCN check above.
1282 This and other cases of XTY_LD are kept just for
1288 /* shared library function trampoline code entry point. */
1292 /* The symbols often have the same names as debug symbols for
1293 functions, and confuse lookup_symbol. */
1297 /* xlc puts each variable in a separate csect, so we get
1298 an XTY_SD for each variable. But gcc puts several
1299 variables in a csect, so that each variable only gets
1300 an XTY_LD. This will typically be XMC_RW; I suspect
1301 XMC_RO and XMC_BS might be possible too.
1302 These variables are put in the minimal symbol table
1309 /* Common symbols are put into the minimal symbol table only. */
1317 switch (cs->c_sclass)
1321 /* c_value field contains symnum of next .file entry in table
1322 or symnum of first global after last .file. */
1324 next_file_symnum = cs->c_value;
1326 /* Complete symbol table for last object file containing
1327 debugging information. */
1329 /* Whether or not there was a csect in the previous file, we
1330 have to call `end_stabs' and `start_stabs' to reset
1331 type_vector, line_vector, etc. structures. */
1333 complete_symtab (filestring, file_start_addr);
1334 cur_src_end_addr = file_end_addr;
1335 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1338 /* XCOFF, according to the AIX 3.2 documentation, puts the
1339 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1340 do things the standard COFF way and put it in the auxent.
1341 We use the auxent if the symbol is ".file" and an auxent
1342 exists, otherwise use the symbol itself. Simple
1344 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1346 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1347 0, cs->c_naux, &main_aux);
1348 filestring = coff_getfilename (&main_aux, objfile);
1351 filestring = cs->c_name;
1354 start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0,
1355 pst_symtab_language);
1356 record_debugformat (debugfmt);
1357 last_csect_name = 0;
1359 /* reset file start and end addresses. A compilation unit
1360 with no text (only data) should have zero file
1362 file_start_addr = file_end_addr = 0;
1366 fcn_stab_saved = *cs;
1370 if (strcmp (cs->c_name, ".bf") == 0)
1372 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1373 SECT_OFF_TEXT (objfile));
1375 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1376 0, cs->c_naux, &main_aux);
1378 within_function = 1;
1380 newobj = push_context (0, fcn_start_addr + off);
1382 newobj->name = define_symbol
1383 (fcn_cs_saved.c_value + off,
1384 fcn_stab_saved.c_name, 0, 0, objfile);
1385 if (newobj->name != NULL)
1386 SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
1388 else if (strcmp (cs->c_name, ".ef") == 0)
1390 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1391 0, cs->c_naux, &main_aux);
1393 /* The value of .ef is the address of epilogue code;
1394 not useful for gdb. */
1395 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1396 contains number of lines to '}' */
1398 if (outermost_context_p ())
1399 { /* We attempted to pop an empty context stack. */
1400 ef_complaint (cs->c_symnum);
1401 within_function = 0;
1404 struct context_stack cstk = pop_context ();
1405 /* Stack must be empty now. */
1406 if (!outermost_context_p ())
1408 ef_complaint (cs->c_symnum);
1409 within_function = 0;
1413 finish_block (cstk.name, cstk.old_blocks,
1414 NULL, cstk.start_addr,
1415 (fcn_cs_saved.c_value
1416 + fcn_aux_saved.x_sym.x_misc.x_fsize
1417 + ANOFFSET (objfile->section_offsets,
1418 SECT_OFF_TEXT (objfile))));
1419 within_function = 0;
1424 /* Begin static block. */
1426 struct internal_syment static_symbol;
1428 read_symbol (&static_symbol, cs->c_value);
1429 static_block_base = static_symbol.n_value;
1430 static_block_section =
1431 secnum_to_section (static_symbol.n_scnum, objfile);
1436 /* End of static block. */
1437 static_block_base = 0;
1438 static_block_section = -1;
1449 complaint (_("Unrecognized storage class %d."),
1464 /* beginning of include file */
1465 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1466 order. Thus, when wee see them, we might not know enough info
1467 to process them. Thus, we'll be saving them into a table
1468 (inclTable) and postpone their processing. */
1470 record_include_begin (cs);
1474 /* End of include file. */
1475 /* See the comment after case C_BINCL. */
1476 record_include_end (cs);
1480 if (strcmp (cs->c_name, ".bb") == 0)
1483 newobj = push_context (depth,
1485 + ANOFFSET (objfile->section_offsets,
1486 SECT_OFF_TEXT (objfile))));
1488 else if (strcmp (cs->c_name, ".eb") == 0)
1490 if (outermost_context_p ())
1491 { /* We attempted to pop an empty context stack. */
1492 eb_complaint (cs->c_symnum);
1495 struct context_stack cstk = pop_context ();
1496 if (depth-- != cstk.depth)
1498 eb_complaint (cs->c_symnum);
1501 if (*get_local_symbols () && !outermost_context_p ())
1503 /* Make a block for the local symbols within. */
1504 finish_block (cstk.name,
1505 cstk.old_blocks, NULL,
1508 + ANOFFSET (objfile->section_offsets,
1509 SECT_OFF_TEXT (objfile))));
1511 *get_local_symbols () = cstk.locals;
1516 process_xcoff_symbol (cs, objfile);
1521 if (get_last_source_file ())
1523 struct compunit_symtab *cust;
1525 complete_symtab (filestring, file_start_addr);
1526 cur_src_end_addr = file_end_addr;
1527 cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1528 /* When reading symbols for the last C_FILE of the objfile, try
1529 to make sure that we set pst->compunit_symtab to the symtab for the
1530 file, not to the _globals_ symtab. I'm not sure whether this
1531 actually works right or when/if it comes up. */
1532 if (pst->compunit_symtab == NULL)
1533 pst->compunit_symtab = cust;
1538 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1539 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1540 *(SYMBOL2) = *(SYMBOL1);
1543 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1544 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1545 (NAME), strlen (NAME)))
1548 /* process one xcoff symbol. */
1550 static struct symbol *
1551 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1553 struct symbol onesymbol;
1554 struct symbol *sym = &onesymbol;
1555 struct symbol *sym2 = NULL;
1561 if (cs->c_secnum < 0)
1563 /* The value is a register number, offset within a frame, etc.,
1564 and does not get relocated. */
1570 sec = secnum_to_section (cs->c_secnum, objfile);
1571 off = ANOFFSET (objfile->section_offsets, sec);
1578 initialize_objfile_symbol (sym);
1580 /* default assumptions */
1581 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1582 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1583 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1585 if (ISFCN (cs->c_type))
1587 /* At this point, we don't know the type of the function. This
1588 will be patched with the type from its stab entry later on in
1589 patch_block_stabs (), unless the file was compiled without -g. */
1591 SYMBOL_SET_LINKAGE_NAME (sym, ((const char *)
1592 SYMNAME_ALLOC (name, symname_alloced)));
1593 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1595 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1596 SYMBOL_DUP (sym, sym2);
1598 if (cs->c_sclass == C_EXT || C_WEAKEXT)
1599 add_symbol_to_list (sym2, get_global_symbols ());
1600 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1601 add_symbol_to_list (sym2, get_file_symbols ());
1605 /* In case we can't figure out the type, provide default. */
1606 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1608 switch (cs->c_sclass)
1611 /* The values of functions and global symbols are now resolved
1612 via the global_sym_chain in stabsread.c. */
1614 if (fcn_cs_saved.c_sclass == C_EXT)
1615 add_stab_to_list (name, &global_stabs);
1617 add_stab_to_list (name, &file_stabs);
1621 add_stab_to_list (name, &global_stabs);
1626 common_block_start (cs->c_name, objfile);
1630 common_block_end (objfile);
1634 complaint (_("Unexpected storage class: %d"),
1647 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1650 SYMBOL_SECTION (sym) = sec;
1657 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1658 all statics and we need to distinguish file-scope versus
1659 function-scope using within_function. We do this by
1660 changing the string we pass to define_symbol to use 'S'
1661 where we need to, which is not necessarily super-clean,
1662 but seems workable enough. */
1667 pp = strchr (name, ':');
1672 if (*pp == 'V' && !within_function)
1674 sym = define_symbol ((cs->c_value
1675 + ANOFFSET (objfile->section_offsets,
1676 static_block_section)),
1677 cs->c_name, 0, 0, objfile);
1680 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1681 SYMBOL_SECTION (sym) = static_block_section;
1690 /* Extract the file name from the aux entry of a C_FILE symbol.
1691 Result is in static storage and is only good for temporary use. */
1694 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1696 static char buffer[BUFSIZ];
1698 if (aux_entry->x_file.x_n.x_zeroes == 0)
1699 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1700 + aux_entry->x_file.x_n.x_offset));
1703 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1704 buffer[FILNMLEN] = '\0';
1709 /* Set *SYMBOL to symbol number symno in symtbl. */
1711 read_symbol (struct internal_syment *symbol, int symno)
1713 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1714 int nsyms = xcoff->symtbl_num_syms;
1715 char *stbl = xcoff->symtbl;
1717 if (symno < 0 || symno >= nsyms)
1719 complaint (_("Invalid symbol offset"));
1720 symbol->n_value = 0;
1721 symbol->n_scnum = -1;
1724 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1725 stbl + (symno * local_symesz),
1729 /* Get value corresponding to symbol number symno in symtbl. */
1732 read_symbol_nvalue (int symno)
1734 struct internal_syment symbol[1];
1736 read_symbol (symbol, symno);
1737 return symbol->n_value;
1741 /* Find the address of the function corresponding to symno, where
1742 symno is the symbol pointed to by the linetable. */
1745 read_symbol_lineno (int symno)
1747 struct objfile *objfile = this_symtab_objfile;
1748 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1750 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1751 int nsyms = info->symtbl_num_syms;
1752 char *stbl = info->symtbl;
1753 char *strtbl = info->strtbl;
1755 struct internal_syment symbol[1];
1756 union internal_auxent main_aux[1];
1760 bf_notfound_complaint ();
1764 /* Note that just searching for a short distance (e.g. 50 symbols)
1765 is not enough, at least in the following case.
1768 [many .stabx entries]
1769 [a few functions, referring to foo]
1773 What happens here is that the assembler moves the .stabx entries
1774 to right before the ".bf" for foo, but the symbol for "foo" is before
1775 all the stabx entries. See PR gdb/2222. */
1777 /* Maintaining a table of .bf entries might be preferable to this search.
1778 If I understand things correctly it would need to be done only for
1779 the duration of a single psymtab to symtab conversion. */
1780 while (symno < nsyms)
1782 bfd_coff_swap_sym_in (symfile_bfd,
1783 stbl + (symno * local_symesz), symbol);
1784 if (symbol->n_sclass == C_FCN)
1786 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1788 if (strcmp (name, ".bf") == 0)
1791 symno += symbol->n_numaux + 1;
1794 bf_notfound_complaint ();
1798 /* Take aux entry and return its lineno. */
1800 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1801 symbol->n_type, symbol->n_sclass,
1802 0, symbol->n_numaux, main_aux);
1804 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1807 /* Support for line number handling. */
1809 /* This function is called for every section; it finds the outer limits
1810 * of the line table (minimum and maximum file offset) so that the
1811 * mainline code can read the whole thing for efficiency.
1814 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1816 struct coff_symfile_info *info;
1818 file_ptr offset, maxoff;
1820 count = asect->lineno_count;
1822 if (strcmp (asect->name, ".text") != 0 || count == 0)
1825 size = count * coff_data (abfd)->local_linesz;
1826 info = (struct coff_symfile_info *) vpinfo;
1827 offset = asect->line_filepos;
1828 maxoff = offset + size;
1830 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1831 info->min_lineno_offset = offset;
1833 if (maxoff > info->max_lineno_offset)
1834 info->max_lineno_offset = maxoff;
1838 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1848 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1853 /* Read in all partial symtabs on which this one is dependent. */
1854 for (i = 0; i < pst->number_of_dependencies; i++)
1855 if (!pst->dependencies[i]->readin)
1857 /* Inform about additional files that need to be read in. */
1860 fputs_filtered (" ", gdb_stdout);
1862 fputs_filtered ("and ", gdb_stdout);
1864 printf_filtered ("%s...", pst->dependencies[i]->filename);
1865 wrap_here (""); /* Flush output */
1866 gdb_flush (gdb_stdout);
1868 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1871 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1873 /* Init stuff necessary for reading in symbols. */
1876 scoped_free_pendings free_pending;
1877 read_xcoff_symtab (objfile, pst);
1883 /* Read in all of the symbols for a given psymtab for real.
1884 Be verbose about it if the user wants that. SELF is not NULL. */
1887 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1892 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1897 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1898 || self->number_of_dependencies)
1900 /* Print the message now, before reading the string table,
1901 to avoid disconcerting pauses. */
1904 printf_filtered ("Reading in symbols for %s...", self->filename);
1905 gdb_flush (gdb_stdout);
1908 next_symbol_text_func = xcoff_next_symbol_text;
1910 xcoff_psymtab_to_symtab_1 (objfile, self);
1912 /* Match with global symbols. This only needs to be done once,
1913 after all of the symtabs and dependencies have been read in. */
1914 scan_file_globals (objfile);
1916 /* Finish up the debug error message. */
1918 printf_filtered ("done.\n");
1923 xcoff_new_init (struct objfile *objfile)
1925 stabsread_new_init ();
1928 /* Do initialization in preparation for reading symbols from OBJFILE.
1930 We will only be called if this is an XCOFF or XCOFF-like file.
1931 BFD handles figuring out the format of the file, and code in symfile.c
1932 uses BFD's determination to vector to us. */
1935 xcoff_symfile_init (struct objfile *objfile)
1937 struct coff_symfile_info *xcoff;
1939 /* Allocate struct to keep track of the symfile. */
1940 xcoff = XNEW (struct coff_symfile_info);
1941 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1943 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1944 find this causes a significant slowdown in gdb then we could
1945 set it in the debug symbol readers only when necessary. */
1946 objfile->flags |= OBJF_REORDERED;
1949 /* Perform any local cleanups required when we are done with a particular
1950 objfile. I.E, we are in the process of discarding all symbol information
1951 for an objfile, freeing up all memory held for it, and unlinking the
1952 objfile struct from the global list of known objfiles. */
1955 xcoff_symfile_finish (struct objfile *objfile)
1957 /* Start with a fresh include table for the next objfile. */
1963 inclIndx = inclLength = inclDepth = 0;
1968 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1972 unsigned char lengthbuf[4];
1974 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1976 xcoff->strtbl = NULL;
1978 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1979 error (_("cannot seek to string table in %s: %s"),
1980 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1982 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1983 length = bfd_h_get_32 (abfd, lengthbuf);
1985 /* If no string table is needed, then the file may end immediately
1986 after the symbols. Just return with `strtbl' set to NULL. */
1988 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1991 /* Allocate string table from objfile_obstack. We will need this table
1992 as long as we have its symbol table around. */
1994 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1995 xcoff->strtbl = strtbl;
1997 /* Copy length buffer, the first byte is usually zero and is
1998 used for stabs with a name length of zero. */
1999 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
2000 if (length == sizeof lengthbuf)
2003 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
2005 if (val != length - sizeof lengthbuf)
2006 error (_("cannot read string table from %s: %s"),
2007 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
2008 if (strtbl[length - 1] != '\0')
2009 error (_("bad symbol file: string table "
2010 "does not end with null character"));
2015 /* If we have not yet seen a function for this psymtab, this is 0. If we
2016 have seen one, it is the offset in the line numbers of the line numbers
2018 static unsigned int first_fun_line_offset;
2020 /* Allocate and partially fill a partial symtab. It will be
2021 completely filled at the end of the symbol list.
2023 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2024 is the address relative to which its symbols are (incremental) or 0
2027 static struct partial_symtab *
2028 xcoff_start_psymtab (struct objfile *objfile,
2029 const char *filename, int first_symnum,
2030 std::vector<partial_symbol *> &global_psymbols,
2031 std::vector<partial_symbol *> &static_psymbols)
2033 struct partial_symtab *result =
2034 start_psymtab_common (objfile,
2036 /* We fill in textlow later. */
2038 global_psymbols, static_psymbols);
2040 result->read_symtab_private =
2041 XOBNEW (&objfile->objfile_obstack, struct symloc);
2042 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2043 result->read_symtab = xcoff_read_symtab;
2045 /* Deduce the source language from the filename for this psymtab. */
2046 psymtab_language = deduce_language_from_filename (filename);
2051 /* Close off the current usage of PST.
2052 Returns PST, or NULL if the partial symtab was empty and thrown away.
2054 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2056 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2057 are the information for includes and dependencies. */
2059 static struct partial_symtab *
2060 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2061 const char **include_list, int num_includes,
2062 int capping_symbol_number,
2063 struct partial_symtab **dependency_list,
2064 int number_dependencies, int textlow_not_set)
2068 if (capping_symbol_number != -1)
2069 ((struct symloc *) pst->read_symtab_private)->numsyms =
2070 capping_symbol_number
2071 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2072 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2073 first_fun_line_offset;
2074 first_fun_line_offset = 0;
2076 end_psymtab_common (objfile, pst);
2078 pst->number_of_dependencies = number_dependencies;
2079 if (number_dependencies)
2081 pst->dependencies = XOBNEWVEC (&objfile->objfile_obstack,
2082 struct partial_symtab *,
2083 number_dependencies);
2084 memcpy (pst->dependencies, dependency_list,
2085 number_dependencies * sizeof (struct partial_symtab *));
2088 pst->dependencies = 0;
2090 for (i = 0; i < num_includes; i++)
2092 struct partial_symtab *subpst =
2093 allocate_psymtab (include_list[i], objfile);
2095 subpst->read_symtab_private = XOBNEW (&objfile->objfile_obstack, symloc);
2096 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2097 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2099 /* We could save slight bits of space by only making one of these,
2100 shared by the entire set of include files. FIXME-someday. */
2101 subpst->dependencies =
2102 XOBNEW (&objfile->objfile_obstack, struct partial_symtab *);
2103 subpst->dependencies[0] = pst;
2104 subpst->number_of_dependencies = 1;
2106 subpst->globals_offset =
2107 subpst->n_global_syms =
2108 subpst->statics_offset =
2109 subpst->n_static_syms = 0;
2112 subpst->compunit_symtab = NULL;
2113 subpst->read_symtab = pst->read_symtab;
2116 if (num_includes == 0
2117 && number_dependencies == 0
2118 && pst->n_global_syms == 0
2119 && pst->n_static_syms == 0)
2121 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2122 it is on the obstack, but we can forget to chain it on the list. */
2123 /* Empty psymtabs happen as a result of header files which don't have
2124 any symbols in them. There can be a lot of them. */
2126 discard_psymtab (objfile, pst);
2128 /* Indicate that psymtab was thrown away. */
2134 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2135 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2136 the symbol and its auxents. */
2139 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2140 const char **name, char **raw, unsigned int *symnump,
2141 struct objfile *objfile)
2143 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2144 if (symbol->n_zeroes)
2146 /* If it's exactly E_SYMNMLEN characters long it isn't
2148 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2150 /* FIXME: wastes memory for symbols which we don't end up putting
2151 into the minimal symbols. */
2154 p = (char *) obstack_alloc (&objfile->objfile_obstack,
2156 strncpy (p, symbol->n_name, E_SYMNMLEN);
2157 p[E_SYMNMLEN] = '\0';
2161 /* Point to the unswapped name as that persists as long as the
2163 *name = ((struct external_syment *) *raw)->e.e_name;
2165 else if (symbol->n_sclass & 0x80)
2167 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2171 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2174 *raw += coff_data (objfile->obfd)->local_symesz;
2175 if (symbol->n_numaux > 0)
2177 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2178 symbol->n_sclass, 0, symbol->n_numaux, aux);
2180 *symnump += symbol->n_numaux;
2181 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2186 function_outside_compilation_unit_complaint (const char *arg1)
2188 complaint (_("function `%s' appears to be defined "
2189 "outside of all compilation units"),
2194 scan_xcoff_symtab (minimal_symbol_reader &reader,
2195 struct objfile *objfile)
2197 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2198 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2199 const char *filestring = NULL;
2201 const char *namestring;
2206 /* Current partial symtab */
2207 struct partial_symtab *pst;
2209 /* List of current psymtab's include files. */
2210 const char **psymtab_include_list;
2211 int includes_allocated;
2214 /* Index within current psymtab dependency list. */
2215 struct partial_symtab **dependency_list;
2216 int dependencies_used, dependencies_allocated;
2219 struct internal_syment symbol;
2220 union internal_auxent main_aux[5];
2221 unsigned int ssymnum;
2223 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2224 CORE_ADDR last_csect_val = 0;
2225 int last_csect_sec = 0;
2226 int misc_func_recorded = 0; /* true if any misc. function. */
2227 int textlow_not_set = 1;
2229 pst = (struct partial_symtab *) 0;
2231 includes_allocated = 30;
2233 psymtab_include_list = (const char **) alloca (includes_allocated *
2234 sizeof (const char *));
2236 dependencies_allocated = 30;
2237 dependencies_used = 0;
2239 (struct partial_symtab **) alloca (dependencies_allocated *
2240 sizeof (struct partial_symtab *));
2242 set_last_source_file (NULL);
2244 abfd = objfile->obfd;
2245 next_symbol_text_func = xcoff_next_symbol_text;
2247 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2248 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2250 while (ssymnum < nsyms)
2256 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2257 sclass = symbol.n_sclass;
2265 /* The CSECT auxent--always the last auxent. */
2266 union internal_auxent csect_aux;
2267 unsigned int symnum_before = ssymnum;
2269 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2271 if (symbol.n_numaux > 1)
2273 bfd_coff_swap_aux_in
2275 sraw_symbol - coff_data (abfd)->local_symesz,
2278 symbol.n_numaux - 1,
2283 csect_aux = main_aux[0];
2285 /* If symbol name starts with ".$" or "$", ignore it. */
2286 if (namestring[0] == '$'
2287 || (namestring[0] == '.' && namestring[1] == '$'))
2290 switch (csect_aux.x_csect.x_smtyp & 0x7)
2293 switch (csect_aux.x_csect.x_smclas)
2296 if (last_csect_name)
2298 /* If no misc. function recorded in the last
2299 seen csect, enter it as a function. This
2300 will take care of functions like strcmp()
2303 if (!misc_func_recorded)
2305 record_minimal_symbol
2306 (reader, last_csect_name, last_csect_val,
2307 mst_text, last_csect_sec, objfile);
2308 misc_func_recorded = 1;
2313 /* We have to allocate one psymtab for
2314 each program csect, because their text
2315 sections need not be adjacent. */
2317 (objfile, pst, psymtab_include_list,
2318 includes_used, symnum_before, dependency_list,
2319 dependencies_used, textlow_not_set);
2321 dependencies_used = 0;
2322 /* Give all psymtabs for this source file the same
2324 pst = xcoff_start_psymtab
2328 objfile->global_psymbols,
2329 objfile->static_psymbols);
2332 /* Activate the misc_func_recorded mechanism for
2333 compiler- and linker-generated CSECTs like ".strcmp"
2335 if (namestring && (namestring[0] == '.'
2336 || namestring[0] == '@'))
2338 last_csect_name = namestring;
2339 last_csect_val = symbol.n_value;
2340 last_csect_sec = symbol.n_scnum;
2345 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2347 if (highval > pst->raw_text_high ())
2348 pst->set_text_high (highval);
2349 if (!pst->text_low_valid
2350 || symbol.n_value < pst->raw_text_low ())
2351 pst->set_text_low (symbol.n_value);
2353 misc_func_recorded = 0;
2358 /* Data variables are recorded in the minimal symbol
2359 table, except for section symbols. */
2360 if (*namestring != '.')
2361 record_minimal_symbol
2362 (reader, namestring, symbol.n_value,
2363 sclass == C_HIDEXT ? mst_file_data : mst_data,
2364 symbol.n_scnum, objfile);
2369 warning (_("More than one XMC_TC0 symbol found."));
2370 toc_offset = symbol.n_value;
2372 /* Make TOC offset relative to start address of
2374 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2376 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2380 /* These symbols tell us where the TOC entry for a
2381 variable is, not the variable itself. */
2390 switch (csect_aux.x_csect.x_smclas)
2393 /* A function entry point. */
2395 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2396 first_fun_line_offset =
2397 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2399 record_minimal_symbol
2400 (reader, namestring, symbol.n_value,
2401 sclass == C_HIDEXT ? mst_file_text : mst_text,
2402 symbol.n_scnum, objfile);
2403 misc_func_recorded = 1;
2407 /* shared library function trampoline code entry
2410 /* record trampoline code entries as
2411 mst_solib_trampoline symbol. When we lookup mst
2412 symbols, we will choose mst_text over
2413 mst_solib_trampoline. */
2414 record_minimal_symbol
2415 (reader, namestring, symbol.n_value,
2416 mst_solib_trampoline, symbol.n_scnum, objfile);
2417 misc_func_recorded = 1;
2421 /* The symbols often have the same names as
2422 debug symbols for functions, and confuse
2428 /* xlc puts each variable in a separate csect,
2429 so we get an XTY_SD for each variable. But
2430 gcc puts several variables in a csect, so
2431 that each variable only gets an XTY_LD. We
2432 still need to record them. This will
2433 typically be XMC_RW; I suspect XMC_RO and
2434 XMC_BS might be possible too. */
2435 if (*namestring != '.')
2436 record_minimal_symbol
2437 (reader, namestring, symbol.n_value,
2438 sclass == C_HIDEXT ? mst_file_data : mst_data,
2439 symbol.n_scnum, objfile);
2445 switch (csect_aux.x_csect.x_smclas)
2449 /* Common variables are recorded in the minimal symbol
2450 table, except for section symbols. */
2451 if (*namestring != '.')
2452 record_minimal_symbol
2453 (reader, namestring, symbol.n_value,
2454 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2455 symbol.n_scnum, objfile);
2467 unsigned int symnum_before;
2469 symnum_before = ssymnum;
2470 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2473 /* See if the last csect needs to be recorded. */
2475 if (last_csect_name && !misc_func_recorded)
2477 /* If no misc. function recorded in the last seen csect, enter
2478 it as a function. This will take care of functions like
2479 strcmp() compiled by xlc. */
2481 record_minimal_symbol (reader, last_csect_name, last_csect_val,
2482 mst_text, last_csect_sec, objfile);
2483 misc_func_recorded = 1;
2488 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2489 includes_used, symnum_before,
2490 dependency_list, dependencies_used,
2493 dependencies_used = 0;
2495 first_fun_line_offset = 0;
2497 /* XCOFF, according to the AIX 3.2 documentation, puts the
2498 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2499 do things the standard COFF way and put it in the auxent.
2500 We use the auxent if the symbol is ".file" and an auxent
2501 exists, otherwise use the symbol itself. */
2502 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2504 filestring = coff_getfilename (&main_aux[0], objfile);
2507 filestring = namestring;
2509 pst = xcoff_start_psymtab (objfile,
2512 objfile->global_psymbols,
2513 objfile->static_psymbols);
2514 last_csect_name = NULL;
2520 complaint (_("Storage class %d not recognized during scan"),
2526 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2527 to handle only the C_FUN and C_EXT. */
2541 /* C_EINCL means we are switching back to the main file. But there
2542 is no reason to care; the only thing we want to know about
2543 includes is the names of all the included (.h) files. */
2548 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2552 /* I don't think the name of the common block (as opposed to the
2553 variables within it) is something which is user visible
2561 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2562 so C_LSYM would appear to be only for locals. */
2568 /* We probably could save a few instructions by assuming that
2569 C_LSYM, C_PSYM, etc., never have auxents. */
2570 int naux1 = symbol.n_numaux + 1;
2573 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2579 /* Mark down an include file in the current psymtab. */
2580 enum language tmp_language;
2582 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2585 tmp_language = deduce_language_from_filename (namestring);
2587 /* Only change the psymtab's language if we've learned
2588 something useful (eg. tmp_language is not language_unknown).
2589 In addition, to match what start_subfile does, never change
2591 if (tmp_language != language_unknown
2592 && (tmp_language != language_c
2593 || psymtab_language != language_cplus))
2594 psymtab_language = tmp_language;
2596 /* In C++, one may expect the same filename to come round many
2597 times, when code is coming alternately from the main file
2598 and from inline functions in other files. So I check to see
2599 if this is a file we've seen before -- either the main
2600 source file, or a previously included file.
2602 This seems to be a lot of time to be spending on N_SOL, but
2603 things like "break c-exp.y:435" need to work (I
2604 suppose the psymtab_include_list could be hashed or put
2605 in a binary tree, if profiling shows this is a major hog). */
2606 if (pst && strcmp (namestring, pst->filename) == 0)
2612 for (i = 0; i < includes_used; i++)
2613 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2621 psymtab_include_list[includes_used++] = namestring;
2622 if (includes_used >= includes_allocated)
2624 const char **orig = psymtab_include_list;
2626 psymtab_include_list = (const char **)
2627 alloca ((includes_allocated *= 2) *
2628 sizeof (const char *));
2629 memcpy (psymtab_include_list, orig,
2630 includes_used * sizeof (const char *));
2635 /* The value of the C_FUN is not the address of the function (it
2636 appears to be the address before linking), but as long as it
2637 is smaller than the actual address, then find_pc_partial_function
2638 will use the minimal symbols instead. I hope. */
2647 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2650 p = strchr (namestring, ':');
2652 continue; /* Not a debugging symbol. */
2654 /* Main processing section for debugging symbols which
2655 the initial read through the symbol tables needs to worry
2656 about. If we reach this point, the symbol which we are
2657 considering is definitely one we are interested in.
2658 p must also contain the (valid) index into the namestring
2659 which indicates the debugging type symbol. */
2664 if (gdbarch_static_transform_name_p (gdbarch))
2665 namestring = gdbarch_static_transform_name
2666 (gdbarch, namestring);
2668 add_psymbol_to_list (namestring, p - namestring, 1,
2669 VAR_DOMAIN, LOC_STATIC,
2670 SECT_OFF_DATA (objfile),
2671 &objfile->static_psymbols,
2673 psymtab_language, objfile);
2677 /* The addresses in these entries are reported to be
2678 wrong. See the code that reads 'G's for symtabs. */
2679 add_psymbol_to_list (namestring, p - namestring, 1,
2680 VAR_DOMAIN, LOC_STATIC,
2681 SECT_OFF_DATA (objfile),
2682 &objfile->global_psymbols,
2684 psymtab_language, objfile);
2688 /* When a 'T' entry is defining an anonymous enum, it
2689 may have a name which is the empty string, or a
2690 single space. Since they're not really defining a
2691 symbol, those shouldn't go in the partial symbol
2692 table. We do pick up the elements of such enums at
2693 'check_enum:', below. */
2694 if (p >= namestring + 2
2695 || (p == namestring + 1
2696 && namestring[0] != ' '))
2698 add_psymbol_to_list (namestring, p - namestring, 1,
2699 STRUCT_DOMAIN, LOC_TYPEDEF, -1,
2700 &objfile->static_psymbols,
2701 0, psymtab_language, objfile);
2704 /* Also a typedef with the same name. */
2705 add_psymbol_to_list (namestring, p - namestring, 1,
2706 VAR_DOMAIN, LOC_TYPEDEF, -1,
2707 &objfile->static_psymbols,
2708 0, psymtab_language, objfile);
2715 if (p != namestring) /* a name is there, not just :T... */
2717 add_psymbol_to_list (namestring, p - namestring, 1,
2718 VAR_DOMAIN, LOC_TYPEDEF, -1,
2719 &objfile->static_psymbols,
2720 0, 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, -1,
2781 &objfile->static_psymbols,
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, -1,
2799 &objfile->static_psymbols,
2800 0, psymtab_language, objfile);
2806 int name_len = p - namestring;
2807 char *name = (char *) xmalloc (name_len + 1);
2809 memcpy (name, namestring, name_len);
2810 name[name_len] = '\0';
2811 function_outside_compilation_unit_complaint (name);
2814 add_psymbol_to_list (namestring, p - namestring, 1,
2815 VAR_DOMAIN, LOC_BLOCK,
2816 SECT_OFF_TEXT (objfile),
2817 &objfile->static_psymbols,
2819 psymtab_language, objfile);
2822 /* Global functions were ignored here, but now they
2823 are put into the global psymtab like one would expect.
2824 They're also in the minimal symbol table. */
2828 int name_len = p - namestring;
2829 char *name = (char *) xmalloc (name_len + 1);
2831 memcpy (name, namestring, name_len);
2832 name[name_len] = '\0';
2833 function_outside_compilation_unit_complaint (name);
2837 /* We need only the minimal symbols for these
2838 loader-generated definitions. Keeping the global
2839 symbols leads to "in psymbols but not in symbols"
2841 if (startswith (namestring, "@FIX"))
2844 add_psymbol_to_list (namestring, p - namestring, 1,
2845 VAR_DOMAIN, LOC_BLOCK,
2846 SECT_OFF_TEXT (objfile),
2847 &objfile->global_psymbols,
2849 psymtab_language, objfile);
2852 /* Two things show up here (hopefully); static symbols of
2853 local scope (static used inside braces) or extensions
2854 of structure symbols. We can ignore both. */
2868 case '#': /* For symbol identification (used in
2873 /* It is a C++ nested symbol. We don't need to record it
2874 (I don't think); if we try to look up foo::bar::baz,
2875 then symbols for the symtab containing foo should get
2876 read in, I think. */
2877 /* Someone says sun cc puts out symbols like
2878 /foo/baz/maclib::/usr/local/bin/maclib,
2879 which would get here with a symbol type of ':'. */
2883 /* Unexpected symbol descriptor. The second and
2884 subsequent stabs of a continued stab can show up
2885 here. The question is whether they ever can mimic
2886 a normal stab--it would be nice if not, since we
2887 certainly don't want to spend the time searching to
2888 the end of every string looking for a
2891 complaint (_("unknown symbol descriptor `%c'"), p[1]);
2893 /* Ignore it; perhaps it is an extension that we don't
2903 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2904 ssymnum, dependency_list,
2905 dependencies_used, textlow_not_set);
2908 /* Record the toc offset value of this symbol table into objfile
2909 structure. If no XMC_TC0 is found, toc_offset should be zero.
2910 Another place to obtain this information would be file auxiliary
2913 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2916 /* Return the toc offset value for a given objfile. */
2919 xcoff_get_toc_offset (struct objfile *objfile)
2922 return XCOFF_DATA (objfile)->toc_offset;
2926 /* Scan and build partial symbols for a symbol file.
2927 We have been initialized by a call to dbx_symfile_init, which
2928 put all the relevant info into a "struct dbx_symfile_info",
2929 hung off the objfile structure.
2931 SECTION_OFFSETS contains offsets relative to which the symbols in the
2932 various sections are (depending where the sections were actually
2936 xcoff_initial_scan (struct objfile *objfile, symfile_add_flags symfile_flags)
2940 int num_symbols; /* # of symbols */
2941 file_ptr symtab_offset; /* symbol table and */
2942 file_ptr stringtab_offset; /* string table file offsets */
2943 struct coff_symfile_info *info;
2947 info = XCOFF_DATA (objfile);
2948 symfile_bfd = abfd = objfile->obfd;
2949 name = objfile_name (objfile);
2951 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2952 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2953 stringtab_offset = symtab_offset +
2954 num_symbols * coff_data (abfd)->local_symesz;
2956 info->min_lineno_offset = 0;
2957 info->max_lineno_offset = 0;
2958 bfd_map_over_sections (abfd, find_linenos, info);
2960 if (num_symbols > 0)
2962 /* Read the string table. */
2963 init_stringtab (abfd, stringtab_offset, objfile);
2965 /* Read the .debug section, if present and if we're not ignoring
2967 if (!(objfile->flags & OBJF_READNEVER))
2969 struct bfd_section *secp;
2970 bfd_size_type length;
2971 bfd_byte *debugsec = NULL;
2973 secp = bfd_get_section_by_name (abfd, ".debug");
2976 length = bfd_section_size (abfd, secp);
2980 = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
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 = (char *) 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.capacity () == 0
3010 && objfile->static_psymbols.capacity () == 0)
3011 /* I'm not sure how how good num_symbols is; the rule of thumb in
3012 init_psymbol_list was developed for a.out. On the one hand,
3013 num_symbols includes auxents. On the other hand, it doesn't
3015 init_psymbol_list (objfile, num_symbols);
3017 scoped_free_pendings free_pending;
3018 minimal_symbol_reader reader (objfile);
3020 /* Now that the symbol table data of the executable file are all in core,
3021 process them and define symbols accordingly. */
3023 scan_xcoff_symtab (reader, objfile);
3025 /* Install any minimal symbols that have been collected as the current
3026 minimal symbols for this objfile. */
3030 /* DWARF2 sections. */
3032 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3033 dwarf2_build_psymtabs (objfile);
3035 dwarf2_build_frame_info (objfile);
3039 xcoff_symfile_offsets (struct objfile *objfile,
3040 const section_addr_info &addrs)
3042 const char *first_section_name;
3044 default_symfile_offsets (objfile, addrs);
3046 /* Oneof the weird side-effects of default_symfile_offsets is that
3047 it sometimes sets some section indices to zero for sections that,
3048 in fact do not exist. See the body of default_symfile_offsets
3049 for more info on when that happens. Undo that, as this then allows
3050 us to test whether the associated section exists or not, and then
3051 access it quickly (without searching it again). */
3053 if (objfile->num_sections == 0)
3054 return; /* Is that even possible? Better safe than sorry. */
3057 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3059 if (objfile->sect_index_text == 0
3060 && strcmp (first_section_name, ".text") != 0)
3061 objfile->sect_index_text = -1;
3063 if (objfile->sect_index_data == 0
3064 && strcmp (first_section_name, ".data") != 0)
3065 objfile->sect_index_data = -1;
3067 if (objfile->sect_index_bss == 0
3068 && strcmp (first_section_name, ".bss") != 0)
3069 objfile->sect_index_bss = -1;
3071 if (objfile->sect_index_rodata == 0
3072 && strcmp (first_section_name, ".rodata") != 0)
3073 objfile->sect_index_rodata = -1;
3076 /* Register our ability to parse symbols for xcoff BFD files. */
3078 static const struct sym_fns xcoff_sym_fns =
3081 /* It is possible that coff and xcoff should be merged as
3082 they do have fundamental similarities (for example, the extra storage
3083 classes used for stabs could presumably be recognized in any COFF file).
3084 However, in addition to obvious things like all the csect hair, there are
3085 some subtler differences between xcoffread.c and coffread.c, notably
3086 the fact that coffread.c has no need to read in all the symbols, but
3087 xcoffread.c reads all the symbols and does in fact randomly access them
3088 (in C_BSTAT and line number processing). */
3090 xcoff_new_init, /* init anything gbl to entire symtab */
3091 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3092 xcoff_initial_scan, /* read a symbol file into symtab */
3093 NULL, /* sym_read_psymbols */
3094 xcoff_symfile_finish, /* finished with file, cleanup */
3095 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3096 default_symfile_segments, /* Get segment information from a file. */
3097 aix_process_linenos,
3098 default_symfile_relocate, /* Relocate a debug section. */
3099 NULL, /* sym_probe_fns */
3103 /* Same as xcoff_get_n_import_files, but for core files. */
3106 xcoff_get_core_n_import_files (bfd *abfd)
3108 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3110 file_ptr offset = 0;
3114 return -1; /* Not a core file. */
3116 for (offset = 0; offset < bfd_get_section_size (sect);)
3122 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3124 next = bfd_get_32 (abfd, buf);
3126 break; /* This is the last entry. */
3130 /* Return the number of entries, excluding the first one, which is
3131 the path to the executable that produced this core file. */
3132 return n_entries - 1;
3135 /* Return the number of import files (shared libraries) that the given
3136 BFD depends on. Return -1 if this number could not be computed. */
3139 xcoff_get_n_import_files (bfd *abfd)
3141 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3145 /* If the ".loader" section does not exist, the objfile is probably
3146 not an executable. Might be a core file... */
3148 return xcoff_get_core_n_import_files (abfd);
3150 /* The number of entries in the Import Files Table is stored in
3151 field l_nimpid. This field is always at offset 16, and is
3152 always 4 bytes long. Read those 4 bytes. */
3154 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3156 l_nimpid = bfd_get_32 (abfd, buf);
3158 /* By convention, the first entry is the default LIBPATH value
3159 to be used by the system loader, so it does not count towards
3160 the number of import files. */
3161 return l_nimpid - 1;
3164 /* Free the per-objfile xcoff data. */
3167 xcoff_free_info (struct objfile *objfile, void *arg)
3173 _initialize_xcoffread (void)
3175 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3177 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,