1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2004, 2007-2012 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #include "gdb_string.h"
29 #include <sys/param.h>
30 #ifdef HAVE_SYS_FILE_H
35 #include "coff/internal.h"
36 #include "libcoff.h" /* FIXME, internal data from BFD */
37 #include "coff/xcoff.h"
39 #include "coff/rs6000.h"
40 #include "xcoffread.h"
44 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
48 #include "stabsread.h"
49 #include "expression.h"
50 #include "complaints.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
59 /* Key for XCOFF-associated data. */
61 static const struct objfile_data *xcoff_objfile_data_key;
63 /* We put a pointer to this structure in the read_symtab_private field
69 /* First symbol number for this file. */
73 /* Number of symbols in the section of the symbol table devoted to
74 this file's symbols (actually, the section bracketed may contain
75 more than just this file's symbols). If numsyms is 0, the only
76 reason for this thing's existence is the dependency list. Nothing
77 else will happen when it is read in. */
81 /* Position of the start of the line number information for this
83 unsigned int lineno_off;
86 /* Remember what we deduced to be the source language of this psymtab. */
88 static enum language psymtab_language = language_unknown;
91 /* Simplified internal version of coff symbol table information. */
96 int c_symnum; /* Symbol number of this entry. */
97 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
99 unsigned char c_sclass;
104 /* Last function's saved coff symbol `cs'. */
106 static struct coff_symbol fcn_cs_saved;
108 static bfd *symfile_bfd;
110 /* Core address of start and end of text of current source file.
111 This is calculated from the first function seen after a C_FILE
115 static CORE_ADDR cur_src_end_addr;
117 /* Core address of the end of the first object file. */
119 static CORE_ADDR first_object_file_end;
121 /* Initial symbol-table-debug-string vector length. */
123 #define INITIAL_STABVECTOR_LENGTH 40
125 /* Nonzero if within a function (so symbols should be local,
126 if nothing says specifically). */
130 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
131 there is any reason not to just use a #define, but might as well
132 ask BFD for the size and store it here, I guess. */
134 static unsigned local_symesz;
136 struct coff_symfile_info
138 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
139 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
141 /* Pointer to the string table. */
144 /* Pointer to debug section. */
147 /* Pointer to the a.out symbol table. */
150 /* Number of symbols in symtbl. */
153 /* Offset in data section to TOC anchor. */
154 CORE_ADDR toc_offset;
157 /* Convenience macro to access the per-objfile XCOFF data. */
159 #define XCOFF_DATA(objfile) \
160 ((struct coff_symfile_info *) objfile_data ((objfile), \
161 xcoff_objfile_data_key))
163 /* XCOFF names for dwarf sections. There is no compressed sections. */
165 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
167 { ".dwabrev", NULL },
170 { NULL, NULL }, /* debug_macinfo */
171 { NULL, NULL }, /* debug_macro */
173 { ".dwrnges", NULL },
174 { NULL, NULL }, /* debug_types */
175 { NULL, NULL }, /* debug_addr */
176 { ".dwframe", NULL },
177 { NULL, NULL }, /* eh_frame */
178 { NULL, NULL }, /* gdb_index */
183 bf_notfound_complaint (void)
185 complaint (&symfile_complaints,
186 _("line numbers off, `.bf' symbol not found"));
190 ef_complaint (int arg1)
192 complaint (&symfile_complaints,
193 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
197 eb_complaint (int arg1)
199 complaint (&symfile_complaints,
200 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
203 static void xcoff_initial_scan (struct objfile *, int);
205 static void scan_xcoff_symtab (struct objfile *);
207 static char *xcoff_next_symbol_text (struct objfile *);
209 static void record_include_begin (struct coff_symbol *);
212 enter_line_range (struct subfile *, unsigned, unsigned,
213 CORE_ADDR, CORE_ADDR, unsigned *);
215 static void init_stringtab (bfd *, file_ptr, struct objfile *);
217 static void xcoff_symfile_init (struct objfile *);
219 static void xcoff_new_init (struct objfile *);
221 static void xcoff_symfile_finish (struct objfile *);
223 static void xcoff_symfile_offsets (struct objfile *,
224 struct section_addr_info *addrs);
226 static char *coff_getfilename (union internal_auxent *, struct objfile *);
228 static void read_symbol (struct internal_syment *, int);
230 static int read_symbol_lineno (int);
232 static CORE_ADDR read_symbol_nvalue (int);
234 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
237 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
240 static void add_stab_to_list (char *, struct pending_stabs **);
243 static int compare_lte (const void *, const void *);
245 static struct linetable *arrange_linetable (struct linetable *);
247 static void record_include_end (struct coff_symbol *);
249 static void process_linenos (CORE_ADDR, CORE_ADDR);
252 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
254 static int secnum_to_section (int, struct objfile *);
255 static asection *secnum_to_bfd_section (int, struct objfile *);
257 struct find_targ_sec_arg
262 struct objfile *objfile;
265 static void find_targ_sec (bfd *, asection *, void *);
268 find_targ_sec (bfd *abfd, asection *sect, void *obj)
270 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
271 struct objfile *objfile = args->objfile;
273 if (sect->target_index == args->targ_index)
275 /* This is the section. Figure out what SECT_OFF_* code it is. */
276 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
277 *args->resultp = SECT_OFF_TEXT (objfile);
278 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
279 *args->resultp = SECT_OFF_DATA (objfile);
281 *args->resultp = sect->index;
282 *args->bfd_sect = sect;
286 /* Search all BFD sections for the section whose target_index is
287 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
288 associated index in the objfile's section_offset table is also
291 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
292 is set to the text section's number. */
295 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
296 asection **bfd_sect, int *secnum)
298 struct find_targ_sec_arg args;
300 args.targ_index = n_scnum;
301 args.resultp = secnum;
302 args.bfd_sect = bfd_sect;
303 args.objfile = objfile;
306 *secnum = SECT_OFF_TEXT (objfile);
308 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
311 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
314 secnum_to_section (int n_scnum, struct objfile *objfile)
319 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
323 /* Return the BFD section that N_SCNUM points to. */
326 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
331 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
335 /* add a given stab string into given stab vector. */
340 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
342 if (*stabvector == NULL)
344 *stabvector = (struct pending_stabs *)
345 xmalloc (sizeof (struct pending_stabs) +
346 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
347 (*stabvector)->count = 0;
348 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
350 else if ((*stabvector)->count >= (*stabvector)->length)
352 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
353 *stabvector = (struct pending_stabs *)
354 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
355 (*stabvector)->length * sizeof (char *));
357 (*stabvector)->stab[(*stabvector)->count++] = stabname;
362 /* Linenos are processed on a file-by-file basis.
366 1) xlc (IBM's native c compiler) postpones static function code
367 emission to the end of a compilation unit. This way it can
368 determine if those functions (statics) are needed or not, and
369 can do some garbage collection (I think). This makes line
370 numbers and corresponding addresses unordered, and we end up
371 with a line table like:
388 and that breaks gdb's binary search on line numbers, if the
389 above table is not sorted on line numbers. And that sort
390 should be on function based, since gcc can emit line numbers
393 10 0x100 - for the init/test part of a for stmt.
396 10 0x400 - for the increment part of a for stmt.
398 arrange_linetable() will do this sorting.
400 2) aix symbol table might look like:
402 c_file // beginning of a new file
403 .bi // beginning of include file
404 .ei // end of include file
408 basically, .bi/.ei pairs do not necessarily encapsulate
409 their scope. They need to be recorded, and processed later
410 on when we come the end of the compilation unit.
411 Include table (inclTable) and process_linenos() handle
417 /* compare line table entry addresses. */
420 compare_lte (const void *lte1p, const void *lte2p)
422 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
423 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
425 return lte1->pc - lte2->pc;
428 /* Given a line table with function entries are marked, arrange its
429 functions in ascending order and strip off function entry markers
430 and return it in a newly created table. If the old one is good
431 enough, return the old one. */
432 /* FIXME: I think all this stuff can be replaced by just passing
433 sort_linevec = 1 to end_symtab. */
435 static struct linetable *
436 arrange_linetable (struct linetable *oldLineTb)
438 int ii, jj, newline, /* new line count */
439 function_count; /* # of functions */
441 struct linetable_entry *fentry; /* function entry vector */
442 int fentry_size; /* # of function entries */
443 struct linetable *newLineTb; /* new line table */
445 #define NUM_OF_FUNCTIONS 20
447 fentry_size = NUM_OF_FUNCTIONS;
448 fentry = (struct linetable_entry *)
449 xmalloc (fentry_size * sizeof (struct linetable_entry));
451 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
453 if (oldLineTb->item[ii].line == 0)
454 { /* Function entry found. */
455 if (function_count >= fentry_size)
456 { /* Make sure you have room. */
458 fentry = (struct linetable_entry *)
460 fentry_size * sizeof (struct linetable_entry));
462 fentry[function_count].line = ii;
463 fentry[function_count].pc = oldLineTb->item[ii].pc;
468 if (function_count == 0)
473 else if (function_count > 1)
474 qsort (fentry, function_count,
475 sizeof (struct linetable_entry), compare_lte);
477 /* Allocate a new line table. */
478 newLineTb = (struct linetable *)
480 (sizeof (struct linetable) +
481 (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
483 /* If line table does not start with a function beginning, copy up until
487 if (oldLineTb->item[0].line != 0)
489 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
490 newLineTb->item[newline] = oldLineTb->item[newline];
492 /* Now copy function lines one by one. */
494 for (ii = 0; ii < function_count; ++ii)
496 for (jj = fentry[ii].line + 1;
497 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
499 newLineTb->item[newline] = oldLineTb->item[jj];
502 newLineTb->nitems = oldLineTb->nitems - function_count;
506 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
507 following `IncludeChain'. At the end of each symtab (end_symtab),
508 we will determine if we should create additional symtab's to
509 represent if (the include files. */
512 typedef struct _inclTable
514 char *name; /* include filename */
516 /* Offsets to the line table. end points to the last entry which is
517 part of this include file. */
520 struct subfile *subfile;
521 unsigned funStartLine; /* Start line # of its function. */
525 #define INITIAL_INCLUDE_TABLE_LENGTH 20
526 static InclTable *inclTable; /* global include table */
527 static int inclIndx; /* last entry to table */
528 static int inclLength; /* table length */
529 static int inclDepth; /* nested include depth */
531 static void allocate_include_entry (void);
534 record_include_begin (struct coff_symbol *cs)
538 /* In xcoff, we assume include files cannot be nested (not in .c files
539 of course, but in corresponding .s files.). */
541 /* This can happen with old versions of GCC.
542 GCC 2.3.3-930426 does not exhibit this on a test case which
543 a user said produced the message for him. */
544 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
548 allocate_include_entry ();
550 inclTable[inclIndx].name = cs->c_name;
551 inclTable[inclIndx].begin = cs->c_value;
555 record_include_end (struct coff_symbol *cs)
561 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
564 allocate_include_entry ();
566 pTbl = &inclTable[inclIndx];
567 pTbl->end = cs->c_value;
574 allocate_include_entry (void)
576 if (inclTable == NULL)
578 inclTable = (InclTable *)
579 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
581 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
582 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
585 else if (inclIndx >= inclLength)
587 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
588 inclTable = (InclTable *)
589 xrealloc (inclTable, sizeof (InclTable) * inclLength);
590 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
591 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
595 /* Global variable to pass the psymtab down to all the routines involved
596 in psymtab to symtab processing. */
597 static struct partial_symtab *this_symtab_psymtab;
599 /* Objfile related to this_symtab_psymtab; set at the same time. */
600 static struct objfile *this_symtab_objfile;
602 /* given the start and end addresses of a compilation unit (or a csect,
603 at times) process its lines and create appropriate line vectors. */
606 process_linenos (CORE_ADDR start, CORE_ADDR end)
610 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
612 /* subfile structure for the main compilation unit. */
613 struct subfile main_subfile;
615 /* In the main source file, any time we see a function entry, we
616 reset this variable to function's absolute starting line number.
617 All the following line numbers in the function are relative to
618 this, and we record absolute line numbers in record_line(). */
620 unsigned int main_source_baseline = 0;
625 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
627 goto return_after_cleanup;
629 memset (&main_subfile, '\0', sizeof (main_subfile));
632 /* All source lines were in the main source file. None in include
635 enter_line_range (&main_subfile, offset, 0, start, end,
636 &main_source_baseline);
640 /* There was source with line numbers in include files. */
643 coff_data (this_symtab_objfile->obfd)->local_linesz;
644 main_source_baseline = 0;
646 for (ii = 0; ii < inclIndx; ++ii)
648 struct subfile *tmpSubfile;
650 /* If there is main file source before include file, enter it. */
651 if (offset < inclTable[ii].begin)
654 (&main_subfile, offset, inclTable[ii].begin - linesz,
655 start, 0, &main_source_baseline);
658 if (strcmp (inclTable[ii].name, last_source_file) == 0)
660 /* The entry in the include table refers to the main source
661 file. Add the lines to the main subfile. */
663 main_source_baseline = inclTable[ii].funStartLine;
665 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
666 start, 0, &main_source_baseline);
667 inclTable[ii].subfile = &main_subfile;
671 /* Have a new subfile for the include file. */
673 tmpSubfile = inclTable[ii].subfile =
674 (struct subfile *) xmalloc (sizeof (struct subfile));
676 memset (tmpSubfile, '\0', sizeof (struct subfile));
677 firstLine = &(inclTable[ii].funStartLine);
679 /* Enter include file's lines now. */
680 enter_line_range (tmpSubfile, inclTable[ii].begin,
681 inclTable[ii].end, start, 0, firstLine);
684 if (offset <= inclTable[ii].end)
685 offset = inclTable[ii].end + linesz;
688 /* All the include files' line have been processed at this point. Now,
689 enter remaining lines of the main file, if any left. */
690 if (offset < max_offset + 1 - linesz)
692 enter_line_range (&main_subfile, offset, 0, start, end,
693 &main_source_baseline);
697 /* Process main file's line numbers. */
698 if (main_subfile.line_vector)
700 struct linetable *lineTb, *lv;
702 lv = main_subfile.line_vector;
704 /* Line numbers are not necessarily ordered. xlc compilation will
705 put static function to the end. */
707 lineTb = arrange_linetable (lv);
710 current_subfile->line_vector = (struct linetable *)
711 xrealloc (lv, (sizeof (struct linetable)
712 + lv->nitems * sizeof (struct linetable_entry)));
717 current_subfile->line_vector = lineTb;
720 current_subfile->line_vector_length =
721 current_subfile->line_vector->nitems;
724 /* Now, process included files' line numbers. */
726 for (ii = 0; ii < inclIndx; ++ii)
728 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
729 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
732 struct linetable *lineTb, *lv;
734 lv = (inclTable[ii].subfile)->line_vector;
736 /* Line numbers are not necessarily ordered. xlc compilation will
737 put static function to the end. */
739 lineTb = arrange_linetable (lv);
743 /* For the same include file, we might want to have more than one
744 subfile. This happens if we have something like:
752 while foo.h including code in it. (stupid but possible)
753 Since start_subfile() looks at the name and uses an
754 existing one if finds, we need to provide a fake name and
758 start_subfile (inclTable[ii].name, (char *) 0);
761 /* Pick a fake name that will produce the same results as this
762 one when passed to deduce_language_from_filename. Kludge on
764 char *fakename = strrchr (inclTable[ii].name, '.');
766 if (fakename == NULL)
768 start_subfile (fakename, (char *) 0);
769 xfree (current_subfile->name);
771 current_subfile->name = xstrdup (inclTable[ii].name);
776 current_subfile->line_vector =
777 (struct linetable *) xrealloc
778 (lv, (sizeof (struct linetable)
779 + lv->nitems * sizeof (struct linetable_entry)));
785 current_subfile->line_vector = lineTb;
788 current_subfile->line_vector_length =
789 current_subfile->line_vector->nitems;
790 start_subfile (pop_subfile (), (char *) 0);
794 return_after_cleanup:
796 /* We don't want to keep alloc/free'ing the global include file table. */
799 /* Start with a fresh subfile structure for the next file. */
800 memset (&main_subfile, '\0', sizeof (struct subfile));
804 aix_process_linenos (void)
806 /* There is no linenos to read if there are only dwarf info. */
807 if (this_symtab_psymtab == NULL)
810 /* Process line numbers and enter them into line vector. */
811 process_linenos (last_source_start_addr, cur_src_end_addr);
815 /* Enter a given range of lines into the line vector.
816 can be called in the following two ways:
817 enter_line_range (subfile, beginoffset, endoffset,
818 startaddr, 0, firstLine) or
819 enter_line_range (subfile, beginoffset, 0,
820 startaddr, endaddr, firstLine)
822 endoffset points to the last line table entry that we should pay
826 enter_line_range (struct subfile *subfile, unsigned beginoffset,
827 unsigned endoffset, /* offsets to line table */
828 CORE_ADDR startaddr, /* offsets to line table */
829 CORE_ADDR endaddr, unsigned *firstLine)
831 struct objfile *objfile = this_symtab_objfile;
832 struct gdbarch *gdbarch = get_objfile_arch (objfile);
833 unsigned int curoffset;
836 struct internal_lineno int_lnno;
837 unsigned int limit_offset;
841 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
843 curoffset = beginoffset;
844 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
848 if (endoffset >= limit_offset)
850 complaint (&symfile_complaints,
851 _("Bad line table offset in C_EINCL directive"));
854 limit_offset = endoffset;
859 abfd = objfile->obfd;
860 linesz = coff_data (abfd)->local_linesz;
861 ext_lnno = alloca (linesz);
863 while (curoffset <= limit_offset)
865 bfd_seek (abfd, curoffset, SEEK_SET);
866 bfd_bread (ext_lnno, linesz, abfd);
867 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
869 /* Find the address this line represents. */
870 addr = (int_lnno.l_lnno
871 ? int_lnno.l_addr.l_paddr
872 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
873 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
875 if (addr < startaddr || (endaddr && addr >= endaddr))
878 if (int_lnno.l_lnno == 0)
880 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
881 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
885 record_line (subfile, *firstLine + int_lnno.l_lnno,
886 gdbarch_addr_bits_remove (gdbarch, addr));
892 /* Save the vital information for use when closing off the current file.
893 NAME is the file name the symbols came from, START_ADDR is the first
894 text address for the file, and SIZE is the number of bytes of text. */
896 #define complete_symtab(name, start_addr) { \
897 last_source_file = xstrdup (name); \
898 last_source_start_addr = start_addr; \
902 /* Refill the symbol table input buffer
903 and set the variables that control fetching entries from it.
904 Reports an error if no data available.
905 This function can read past the end of the symbol table
906 (into the string table) but this does no harm. */
908 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
912 NAME - the symbol's name (but if NAME starts with a period, that
913 leading period is discarded).
914 ADDRESS - the symbol's address.
915 MS_TYPE - the symbol's type.
916 N_SCNUM - the symbol's XCOFF section number.
917 OBJFILE - the objfile associated with the minimal symbol. */
920 record_minimal_symbol (const char *name, CORE_ADDR address,
921 enum minimal_symbol_type ms_type,
923 struct objfile *objfile)
931 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &secnum);
932 prim_record_minimal_symbol_and_info (name, address, ms_type,
933 secnum, bfd_sect, objfile);
936 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
937 nested. At any given time, a symbol can only be in one static block.
938 This is the base address of current static block, zero if non exists. */
940 static int static_block_base = 0;
942 /* Section number for the current static block. */
944 static int static_block_section = -1;
946 /* true if space for symbol name has been allocated. */
948 static int symname_alloced = 0;
950 /* Next symbol to read. Pointer into raw seething symbol table. */
952 static char *raw_symbol;
954 /* This is the function which stabsread.c calls to get symbol
958 xcoff_next_symbol_text (struct objfile *objfile)
960 struct internal_syment symbol;
963 /* FIXME: is this the same as the passed arg? */
964 if (this_symtab_objfile)
965 objfile = this_symtab_objfile;
967 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
970 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
972 /* Return something which points to '\0' and hope the symbol reading
973 code does something reasonable. */
976 else if (symbol.n_sclass & 0x80)
978 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
979 raw_symbol += coff_data (objfile->obfd)->local_symesz;
984 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
986 /* Return something which points to '\0' and hope the symbol reading
987 code does something reasonable. */
993 /* Read symbols for a given partial symbol table. */
996 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
998 bfd *abfd = objfile->obfd;
999 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1000 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1001 char *strtbl = xcoff->strtbl;
1002 char *debugsec = xcoff->debugsec;
1003 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1005 struct internal_syment symbol[1];
1006 union internal_auxent main_aux;
1007 struct coff_symbol cs[1];
1008 CORE_ADDR file_start_addr = 0;
1009 CORE_ADDR file_end_addr = 0;
1011 int next_file_symnum = -1;
1012 unsigned int max_symnum;
1013 int just_started = 1;
1015 int fcn_start_addr = 0;
1017 struct coff_symbol fcn_stab_saved = { 0 };
1019 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1020 union internal_auxent fcn_aux_saved = main_aux;
1021 struct context_stack *new;
1023 char *filestring = " _start_ "; /* Name of the current file. */
1025 const char *last_csect_name; /* Last seen csect's name. */
1027 this_symtab_psymtab = pst;
1028 this_symtab_objfile = objfile;
1030 /* Get the appropriate COFF "constants" related to the file we're
1032 local_symesz = coff_data (abfd)->local_symesz;
1034 last_source_file = NULL;
1035 last_csect_name = 0;
1038 start_symtab (filestring, (char *) NULL, file_start_addr);
1039 record_debugformat (debugfmt);
1040 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1042 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1043 first_object_file_end = 0;
1045 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1047 while (symnum < max_symnum)
1049 QUIT; /* make this command interruptable. */
1051 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1052 /* read one symbol into `cs' structure. After processing the
1053 whole symbol table, only string table will be kept in memory,
1054 symbol table and debug section of xcoff will be freed. Thus
1055 we can mark symbols with names in string table as
1060 /* Swap and align the symbol into a reasonable C structure. */
1061 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1063 cs->c_symnum = symnum;
1064 cs->c_naux = symbol->n_numaux;
1065 if (symbol->n_zeroes)
1067 symname_alloced = 0;
1068 /* We must use the original, unswapped, name here so the name field
1069 pointed to by cs->c_name will persist throughout xcoffread. If
1070 we use the new field, it gets overwritten for each symbol. */
1071 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1072 /* If it's exactly E_SYMNMLEN characters long it isn't
1074 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1078 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
1079 strncpy (p, cs->c_name, E_SYMNMLEN);
1080 p[E_SYMNMLEN] = '\0';
1082 symname_alloced = 1;
1085 else if (symbol->n_sclass & 0x80)
1087 cs->c_name = debugsec + symbol->n_offset;
1088 symname_alloced = 0;
1092 /* in string table */
1093 cs->c_name = strtbl + (int) symbol->n_offset;
1094 symname_alloced = 1;
1096 cs->c_value = symbol->n_value;
1097 cs->c_sclass = symbol->n_sclass;
1098 cs->c_secnum = symbol->n_scnum;
1099 cs->c_type = (unsigned) symbol->n_type;
1101 raw_symbol += local_symesz;
1104 /* Save addr of first aux entry. */
1105 raw_auxptr = raw_symbol;
1107 /* Skip all the auxents associated with this symbol. */
1108 for (ii = symbol->n_numaux; ii; --ii)
1110 raw_symbol += coff_data (abfd)->local_auxesz;
1115 /* if symbol name starts with ".$" or "$", ignore it. */
1116 if (cs->c_name[0] == '$'
1117 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1120 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1122 if (last_source_file)
1124 pst->symtab = end_symtab (cur_src_end_addr, objfile,
1125 SECT_OFF_TEXT (objfile));
1130 start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0);
1131 record_debugformat (debugfmt);
1132 cur_src_end_addr = first_object_file_end;
1133 /* Done with all files, everything from here on is globals. */
1136 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1139 /* Dealing with a symbol with a csect entry. */
1141 #define CSECT(PP) ((PP)->x_csect)
1142 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1143 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1144 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1145 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1147 /* Convert the auxent to something we can access. */
1148 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1149 0, cs->c_naux, &main_aux);
1151 switch (CSECT_SMTYP (&main_aux))
1155 /* Ignore all external references. */
1159 /* A section description. */
1161 switch (CSECT_SCLAS (&main_aux))
1167 /* A program csect is seen. We have to allocate one
1168 symbol table for each program csect. Normally gdb
1169 prefers one symtab for each source file. In case
1170 of AIX, one source file might include more than one
1171 [PR] csect, and they don't have to be adjacent in
1172 terms of the space they occupy in memory. Thus, one
1173 single source file might get fragmented in the
1174 memory and gdb's file start and end address
1175 approach does not work! GCC (and I think xlc) seem
1176 to put all the code in the unnamed program csect. */
1178 if (last_csect_name)
1180 complete_symtab (filestring, file_start_addr);
1181 cur_src_end_addr = file_end_addr;
1182 end_symtab (file_end_addr, objfile,
1183 SECT_OFF_TEXT (objfile));
1186 /* Give all csects for this source file the same
1188 start_symtab (filestring, NULL, (CORE_ADDR) 0);
1189 record_debugformat (debugfmt);
1192 /* If this is the very first csect seen,
1193 basically `__start'. */
1196 first_object_file_end
1197 = cs->c_value + CSECT_LEN (&main_aux);
1202 cs->c_value + ANOFFSET (objfile->section_offsets,
1203 SECT_OFF_TEXT (objfile));
1204 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1206 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1207 last_csect_name = cs->c_name;
1211 /* All other symbols are put into the minimal symbol
1224 /* Ignore the symbol. */
1232 switch (CSECT_SCLAS (&main_aux))
1235 /* a function entry point. */
1236 function_entry_point:
1238 fcn_start_addr = cs->c_value;
1240 /* save the function header info, which will be used
1241 when `.bf' is seen. */
1243 fcn_aux_saved = main_aux;
1247 /* shared library function trampoline code entry point. */
1251 /* The symbols often have the same names as debug symbols for
1252 functions, and confuse lookup_symbol. */
1256 /* xlc puts each variable in a separate csect, so we get
1257 an XTY_SD for each variable. But gcc puts several
1258 variables in a csect, so that each variable only gets
1259 an XTY_LD. This will typically be XMC_RW; I suspect
1260 XMC_RO and XMC_BS might be possible too.
1261 These variables are put in the minimal symbol table
1268 /* Common symbols are put into the minimal symbol table only. */
1276 /* If explicitly specified as a function, treat is as one. This check
1277 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1278 after the above CSECT check. */
1279 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1281 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1282 0, cs->c_naux, &main_aux);
1283 goto function_entry_point;
1286 switch (cs->c_sclass)
1290 /* c_value field contains symnum of next .file entry in table
1291 or symnum of first global after last .file. */
1293 next_file_symnum = cs->c_value;
1295 /* Complete symbol table for last object file containing
1296 debugging information. */
1298 /* Whether or not there was a csect in the previous file, we
1299 have to call `end_stabs' and `start_stabs' to reset
1300 type_vector, line_vector, etc. structures. */
1302 complete_symtab (filestring, file_start_addr);
1303 cur_src_end_addr = file_end_addr;
1304 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1307 /* XCOFF, according to the AIX 3.2 documentation, puts the
1308 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1309 do things the standard COFF way and put it in the auxent.
1310 We use the auxent if the symbol is ".file" and an auxent
1311 exists, otherwise use the symbol itself. Simple
1313 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1315 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1316 0, cs->c_naux, &main_aux);
1317 filestring = coff_getfilename (&main_aux, objfile);
1320 filestring = cs->c_name;
1323 start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0);
1324 record_debugformat (debugfmt);
1325 last_csect_name = 0;
1327 /* reset file start and end addresses. A compilation unit
1328 with no text (only data) should have zero file
1330 file_start_addr = file_end_addr = 0;
1334 fcn_stab_saved = *cs;
1338 if (strcmp (cs->c_name, ".bf") == 0)
1340 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1341 SECT_OFF_TEXT (objfile));
1343 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1344 0, cs->c_naux, &main_aux);
1346 within_function = 1;
1348 new = push_context (0, fcn_start_addr + off);
1350 new->name = define_symbol
1351 (fcn_cs_saved.c_value + off,
1352 fcn_stab_saved.c_name, 0, 0, objfile);
1353 if (new->name != NULL)
1354 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1356 else if (strcmp (cs->c_name, ".ef") == 0)
1358 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1359 0, cs->c_naux, &main_aux);
1361 /* The value of .ef is the address of epilogue code;
1362 not useful for gdb. */
1363 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1364 contains number of lines to '}' */
1366 if (context_stack_depth <= 0)
1367 { /* We attempted to pop an empty context stack. */
1368 ef_complaint (cs->c_symnum);
1369 within_function = 0;
1372 new = pop_context ();
1373 /* Stack must be empty now. */
1374 if (context_stack_depth > 0 || new == NULL)
1376 ef_complaint (cs->c_symnum);
1377 within_function = 0;
1381 finish_block (new->name, &local_symbols, new->old_blocks,
1383 (fcn_cs_saved.c_value
1384 + fcn_aux_saved.x_sym.x_misc.x_fsize
1385 + ANOFFSET (objfile->section_offsets,
1386 SECT_OFF_TEXT (objfile))),
1388 within_function = 0;
1393 /* Begin static block. */
1395 struct internal_syment symbol;
1397 read_symbol (&symbol, cs->c_value);
1398 static_block_base = symbol.n_value;
1399 static_block_section =
1400 secnum_to_section (symbol.n_scnum, objfile);
1405 /* End of static block. */
1406 static_block_base = 0;
1407 static_block_section = -1;
1418 complaint (&symfile_complaints,
1419 _("Unrecognized storage class %d."),
1434 /* beginning of include file */
1435 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1436 order. Thus, when wee see them, we might not know enough info
1437 to process them. Thus, we'll be saving them into a table
1438 (inclTable) and postpone their processing. */
1440 record_include_begin (cs);
1444 /* End of include file. */
1445 /* See the comment after case C_BINCL. */
1446 record_include_end (cs);
1450 if (strcmp (cs->c_name, ".bb") == 0)
1453 new = push_context (depth,
1455 + ANOFFSET (objfile->section_offsets,
1456 SECT_OFF_TEXT (objfile))));
1458 else if (strcmp (cs->c_name, ".eb") == 0)
1460 if (context_stack_depth <= 0)
1461 { /* We attempted to pop an empty context stack. */
1462 eb_complaint (cs->c_symnum);
1465 new = pop_context ();
1466 if (depth-- != new->depth)
1468 eb_complaint (cs->c_symnum);
1471 if (local_symbols && context_stack_depth > 0)
1473 /* Make a block for the local symbols within. */
1474 finish_block (new->name, &local_symbols, new->old_blocks,
1477 + ANOFFSET (objfile->section_offsets,
1478 SECT_OFF_TEXT (objfile))),
1481 local_symbols = new->locals;
1486 process_xcoff_symbol (cs, objfile);
1491 if (last_source_file)
1495 complete_symtab (filestring, file_start_addr);
1496 cur_src_end_addr = file_end_addr;
1497 s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1498 /* When reading symbols for the last C_FILE of the objfile, try
1499 to make sure that we set pst->symtab to the symtab for the
1500 file, not to the _globals_ symtab. I'm not sure whether this
1501 actually works right or when/if it comes up. */
1502 if (pst->symtab == NULL)
1508 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1509 (SYMBOL2) = (struct symbol *) \
1510 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1511 *(SYMBOL2) = *(SYMBOL1);
1514 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1515 ((ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), \
1516 &objfile->objfile_obstack))
1519 /* process one xcoff symbol. */
1521 static struct symbol *
1522 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1524 struct symbol onesymbol;
1525 struct symbol *sym = &onesymbol;
1526 struct symbol *sym2 = NULL;
1532 if (cs->c_secnum < 0)
1534 /* The value is a register number, offset within a frame, etc.,
1535 and does not get relocated. */
1541 sec = secnum_to_section (cs->c_secnum, objfile);
1542 off = ANOFFSET (objfile->section_offsets, sec);
1549 memset (sym, '\0', sizeof (struct symbol));
1551 /* default assumptions */
1552 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1553 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1554 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1556 if (ISFCN (cs->c_type))
1558 /* At this point, we don't know the type of the function. This
1559 will be patched with the type from its stab entry later on in
1560 patch_block_stabs (), unless the file was compiled without -g. */
1562 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1563 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1565 SYMBOL_CLASS (sym) = LOC_BLOCK;
1566 SYMBOL_DUP (sym, sym2);
1568 if (cs->c_sclass == C_EXT)
1569 add_symbol_to_list (sym2, &global_symbols);
1570 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1571 add_symbol_to_list (sym2, &file_symbols);
1575 /* In case we can't figure out the type, provide default. */
1576 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1578 switch (cs->c_sclass)
1581 /* The values of functions and global symbols are now resolved
1582 via the global_sym_chain in stabsread.c. */
1584 if (fcn_cs_saved.c_sclass == C_EXT)
1585 add_stab_to_list (name, &global_stabs);
1587 add_stab_to_list (name, &file_stabs);
1591 add_stab_to_list (name, &global_stabs);
1596 common_block_start (cs->c_name, objfile);
1600 common_block_end (objfile);
1604 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1617 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1620 SYMBOL_SECTION (sym) = sec;
1627 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1628 all statics and we need to distinguish file-scope versus
1629 function-scope using within_function. We do this by
1630 changing the string we pass to define_symbol to use 'S'
1631 where we need to, which is not necessarily super-clean,
1632 but seems workable enough. */
1637 pp = strchr (name, ':');
1642 if (*pp == 'V' && !within_function)
1644 sym = define_symbol ((cs->c_value
1645 + ANOFFSET (objfile->section_offsets,
1646 static_block_section)),
1647 cs->c_name, 0, 0, objfile);
1650 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1651 SYMBOL_SECTION (sym) = static_block_section;
1660 /* Extract the file name from the aux entry of a C_FILE symbol.
1661 Result is in static storage and is only good for temporary use. */
1664 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1666 static char buffer[BUFSIZ];
1668 if (aux_entry->x_file.x_n.x_zeroes == 0)
1669 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1670 + aux_entry->x_file.x_n.x_offset));
1673 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1674 buffer[FILNMLEN] = '\0';
1679 /* Set *SYMBOL to symbol number symno in symtbl. */
1681 read_symbol (struct internal_syment *symbol, int symno)
1683 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1684 int nsyms = xcoff->symtbl_num_syms;
1685 char *stbl = xcoff->symtbl;
1687 if (symno < 0 || symno >= nsyms)
1689 complaint (&symfile_complaints, _("Invalid symbol offset"));
1690 symbol->n_value = 0;
1691 symbol->n_scnum = -1;
1694 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1695 stbl + (symno * local_symesz),
1699 /* Get value corresponding to symbol number symno in symtbl. */
1702 read_symbol_nvalue (int symno)
1704 struct internal_syment symbol[1];
1706 read_symbol (symbol, symno);
1707 return symbol->n_value;
1711 /* Find the address of the function corresponding to symno, where
1712 symno is the symbol pointed to by the linetable. */
1715 read_symbol_lineno (int symno)
1717 struct objfile *objfile = this_symtab_objfile;
1718 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1720 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1721 int nsyms = info->symtbl_num_syms;
1722 char *stbl = info->symtbl;
1723 char *strtbl = info->strtbl;
1725 struct internal_syment symbol[1];
1726 union internal_auxent main_aux[1];
1730 bf_notfound_complaint ();
1734 /* Note that just searching for a short distance (e.g. 50 symbols)
1735 is not enough, at least in the following case.
1738 [many .stabx entries]
1739 [a few functions, referring to foo]
1743 What happens here is that the assembler moves the .stabx entries
1744 to right before the ".bf" for foo, but the symbol for "foo" is before
1745 all the stabx entries. See PR gdb/2222. */
1747 /* Maintaining a table of .bf entries might be preferable to this search.
1748 If I understand things correctly it would need to be done only for
1749 the duration of a single psymtab to symtab conversion. */
1750 while (symno < nsyms)
1752 bfd_coff_swap_sym_in (symfile_bfd,
1753 stbl + (symno * local_symesz), symbol);
1754 if (symbol->n_sclass == C_FCN)
1756 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1758 if (strcmp (name, ".bf") == 0)
1761 symno += symbol->n_numaux + 1;
1764 bf_notfound_complaint ();
1768 /* Take aux entry and return its lineno. */
1770 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1771 symbol->n_type, symbol->n_sclass,
1772 0, symbol->n_numaux, main_aux);
1774 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1777 /* Support for line number handling. */
1779 /* This function is called for every section; it finds the outer limits
1780 * of the line table (minimum and maximum file offset) so that the
1781 * mainline code can read the whole thing for efficiency.
1784 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1786 struct coff_symfile_info *info;
1788 file_ptr offset, maxoff;
1790 count = asect->lineno_count;
1792 if (strcmp (asect->name, ".text") != 0 || count == 0)
1795 size = count * coff_data (abfd)->local_linesz;
1796 info = (struct coff_symfile_info *) vpinfo;
1797 offset = asect->line_filepos;
1798 maxoff = offset + size;
1800 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1801 info->min_lineno_offset = offset;
1803 if (maxoff > info->max_lineno_offset)
1804 info->max_lineno_offset = maxoff;
1808 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1810 struct cleanup *old_chain;
1819 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1824 /* Read in all partial symtabs on which this one is dependent. */
1825 for (i = 0; i < pst->number_of_dependencies; i++)
1826 if (!pst->dependencies[i]->readin)
1828 /* Inform about additional files that need to be read in. */
1831 fputs_filtered (" ", gdb_stdout);
1833 fputs_filtered ("and ", gdb_stdout);
1835 printf_filtered ("%s...", pst->dependencies[i]->filename);
1836 wrap_here (""); /* Flush output */
1837 gdb_flush (gdb_stdout);
1839 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1842 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1844 /* Init stuff necessary for reading in symbols. */
1847 old_chain = make_cleanup (really_free_pendings, 0);
1849 read_xcoff_symtab (objfile, pst);
1851 do_cleanups (old_chain);
1857 /* Read in all of the symbols for a given psymtab for real.
1858 Be verbose about it if the user wants that. */
1861 xcoff_psymtab_to_symtab (struct objfile *objfile, struct partial_symtab *pst)
1869 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1874 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0
1875 || pst->number_of_dependencies)
1877 /* Print the message now, before reading the string table,
1878 to avoid disconcerting pauses. */
1881 printf_filtered ("Reading in symbols for %s...", pst->filename);
1882 gdb_flush (gdb_stdout);
1885 next_symbol_text_func = xcoff_next_symbol_text;
1887 xcoff_psymtab_to_symtab_1 (objfile, pst);
1889 /* Match with global symbols. This only needs to be done once,
1890 after all of the symtabs and dependencies have been read in. */
1891 scan_file_globals (objfile);
1893 /* Finish up the debug error message. */
1895 printf_filtered ("done.\n");
1900 xcoff_new_init (struct objfile *objfile)
1902 stabsread_new_init ();
1903 buildsym_new_init ();
1906 /* Do initialization in preparation for reading symbols from OBJFILE.
1908 We will only be called if this is an XCOFF or XCOFF-like file.
1909 BFD handles figuring out the format of the file, and code in symfile.c
1910 uses BFD's determination to vector to us. */
1913 xcoff_symfile_init (struct objfile *objfile)
1915 struct coff_symfile_info *xcoff;
1917 /* Allocate struct to keep track of the symfile. */
1918 xcoff = XNEW (struct coff_symfile_info);
1919 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1921 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1922 find this causes a significant slowdown in gdb then we could
1923 set it in the debug symbol readers only when necessary. */
1924 objfile->flags |= OBJF_REORDERED;
1927 /* Perform any local cleanups required when we are done with a particular
1928 objfile. I.E, we are in the process of discarding all symbol information
1929 for an objfile, freeing up all memory held for it, and unlinking the
1930 objfile struct from the global list of known objfiles. */
1933 xcoff_symfile_finish (struct objfile *objfile)
1935 /* Start with a fresh include table for the next objfile. */
1941 inclIndx = inclLength = inclDepth = 0;
1943 dwarf2_free_objfile (objfile);
1948 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1952 unsigned char lengthbuf[4];
1954 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1956 xcoff->strtbl = NULL;
1958 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1959 error (_("cannot seek to string table in %s: %s"),
1960 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1962 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1963 length = bfd_h_get_32 (abfd, lengthbuf);
1965 /* If no string table is needed, then the file may end immediately
1966 after the symbols. Just return with `strtbl' set to NULL. */
1968 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1971 /* Allocate string table from objfile_obstack. We will need this table
1972 as long as we have its symbol table around. */
1974 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1975 xcoff->strtbl = strtbl;
1977 /* Copy length buffer, the first byte is usually zero and is
1978 used for stabs with a name length of zero. */
1979 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1980 if (length == sizeof lengthbuf)
1983 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1985 if (val != length - sizeof lengthbuf)
1986 error (_("cannot read string table from %s: %s"),
1987 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1988 if (strtbl[length - 1] != '\0')
1989 error (_("bad symbol file: string table "
1990 "does not end with null character"));
1995 /* If we have not yet seen a function for this psymtab, this is 0. If we
1996 have seen one, it is the offset in the line numbers of the line numbers
1998 static unsigned int first_fun_line_offset;
2000 /* Allocate and partially fill a partial symtab. It will be
2001 completely filled at the end of the symbol list.
2003 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2004 is the address relative to which its symbols are (incremental) or 0
2007 static struct partial_symtab *
2008 xcoff_start_psymtab (struct objfile *objfile,
2009 const char *filename, int first_symnum,
2010 struct partial_symbol **global_syms,
2011 struct partial_symbol **static_syms)
2013 struct partial_symtab *result =
2014 start_psymtab_common (objfile, objfile->section_offsets,
2016 /* We fill in textlow later. */
2018 global_syms, static_syms);
2020 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2021 sizeof (struct symloc));
2022 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2023 result->read_symtab = xcoff_psymtab_to_symtab;
2025 /* Deduce the source language from the filename for this psymtab. */
2026 psymtab_language = deduce_language_from_filename (filename);
2031 /* Close off the current usage of PST.
2032 Returns PST, or NULL if the partial symtab was empty and thrown away.
2034 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2036 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2037 are the information for includes and dependencies. */
2039 static struct partial_symtab *
2040 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2041 const char **include_list, int num_includes,
2042 int capping_symbol_number,
2043 struct partial_symtab **dependency_list,
2044 int number_dependencies, int textlow_not_set)
2048 if (capping_symbol_number != -1)
2049 ((struct symloc *) pst->read_symtab_private)->numsyms =
2050 capping_symbol_number
2051 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2052 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2053 first_fun_line_offset;
2054 first_fun_line_offset = 0;
2055 pst->n_global_syms = objfile->global_psymbols.next
2056 - (objfile->global_psymbols.list + pst->globals_offset);
2057 pst->n_static_syms = objfile->static_psymbols.next
2058 - (objfile->static_psymbols.list + pst->statics_offset);
2060 pst->number_of_dependencies = number_dependencies;
2061 if (number_dependencies)
2063 pst->dependencies = (struct partial_symtab **)
2064 obstack_alloc (&objfile->objfile_obstack,
2065 number_dependencies * sizeof (struct partial_symtab *));
2066 memcpy (pst->dependencies, dependency_list,
2067 number_dependencies * sizeof (struct partial_symtab *));
2070 pst->dependencies = 0;
2072 for (i = 0; i < num_includes; i++)
2074 struct partial_symtab *subpst =
2075 allocate_psymtab (include_list[i], objfile);
2077 subpst->section_offsets = pst->section_offsets;
2078 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2079 sizeof (struct symloc));
2080 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2081 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2082 subpst->textlow = 0;
2083 subpst->texthigh = 0;
2085 /* We could save slight bits of space by only making one of these,
2086 shared by the entire set of include files. FIXME-someday. */
2087 subpst->dependencies = (struct partial_symtab **)
2088 obstack_alloc (&objfile->objfile_obstack,
2089 sizeof (struct partial_symtab *));
2090 subpst->dependencies[0] = pst;
2091 subpst->number_of_dependencies = 1;
2093 subpst->globals_offset =
2094 subpst->n_global_syms =
2095 subpst->statics_offset =
2096 subpst->n_static_syms = 0;
2100 subpst->read_symtab = pst->read_symtab;
2103 sort_pst_symbols (objfile, pst);
2105 if (num_includes == 0
2106 && number_dependencies == 0
2107 && pst->n_global_syms == 0
2108 && pst->n_static_syms == 0)
2110 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2111 it is on the obstack, but we can forget to chain it on the list. */
2112 /* Empty psymtabs happen as a result of header files which don't have
2113 any symbols in them. There can be a lot of them. */
2115 discard_psymtab (objfile, pst);
2117 /* Indicate that psymtab was thrown away. */
2118 pst = (struct partial_symtab *) NULL;
2123 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2124 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2125 the symbol and its auxents. */
2128 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2129 const char **name, char **raw, unsigned int *symnump,
2130 struct objfile *objfile)
2132 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2133 if (symbol->n_zeroes)
2135 /* If it's exactly E_SYMNMLEN characters long it isn't
2137 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2139 /* FIXME: wastes memory for symbols which we don't end up putting
2140 into the minimal symbols. */
2143 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2144 strncpy (p, symbol->n_name, E_SYMNMLEN);
2145 p[E_SYMNMLEN] = '\0';
2149 /* Point to the unswapped name as that persists as long as the
2151 *name = ((struct external_syment *) *raw)->e.e_name;
2153 else if (symbol->n_sclass & 0x80)
2155 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2159 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2162 *raw += coff_data (objfile->obfd)->local_symesz;
2163 if (symbol->n_numaux > 0)
2165 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2166 symbol->n_sclass, 0, symbol->n_numaux, aux);
2168 *symnump += symbol->n_numaux;
2169 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2174 function_outside_compilation_unit_complaint (const char *arg1)
2176 complaint (&symfile_complaints,
2177 _("function `%s' appears to be defined "
2178 "outside of all compilation units"),
2183 scan_xcoff_symtab (struct objfile *objfile)
2185 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2186 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2187 const char *filestring = NULL;
2189 const char *namestring;
2190 int past_first_source_file = 0;
2195 /* Current partial symtab */
2196 struct partial_symtab *pst;
2198 /* List of current psymtab's include files. */
2199 const char **psymtab_include_list;
2200 int includes_allocated;
2203 /* Index within current psymtab dependency list. */
2204 struct partial_symtab **dependency_list;
2205 int dependencies_used, dependencies_allocated;
2208 struct internal_syment symbol;
2209 union internal_auxent main_aux[5];
2210 unsigned int ssymnum;
2212 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2213 CORE_ADDR last_csect_val = 0;
2214 int last_csect_sec = 0;
2215 int misc_func_recorded = 0; /* true if any misc. function. */
2216 int textlow_not_set = 1;
2218 pst = (struct partial_symtab *) 0;
2220 includes_allocated = 30;
2222 psymtab_include_list = (const char **) alloca (includes_allocated *
2223 sizeof (const char *));
2225 dependencies_allocated = 30;
2226 dependencies_used = 0;
2228 (struct partial_symtab **) alloca (dependencies_allocated *
2229 sizeof (struct partial_symtab *));
2231 last_source_file = NULL;
2233 abfd = objfile->obfd;
2234 next_symbol_text_func = xcoff_next_symbol_text;
2236 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2237 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2239 while (ssymnum < nsyms)
2245 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2246 sclass = symbol.n_sclass;
2253 /* The CSECT auxent--always the last auxent. */
2254 union internal_auxent csect_aux;
2255 unsigned int symnum_before = ssymnum;
2257 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2259 if (symbol.n_numaux > 1)
2261 bfd_coff_swap_aux_in
2263 sraw_symbol - coff_data (abfd)->local_symesz,
2266 symbol.n_numaux - 1,
2271 csect_aux = main_aux[0];
2273 /* If symbol name starts with ".$" or "$", ignore it. */
2274 if (namestring[0] == '$'
2275 || (namestring[0] == '.' && namestring[1] == '$'))
2278 switch (csect_aux.x_csect.x_smtyp & 0x7)
2281 switch (csect_aux.x_csect.x_smclas)
2284 if (last_csect_name)
2286 /* If no misc. function recorded in the last
2287 seen csect, enter it as a function. This
2288 will take care of functions like strcmp()
2291 if (!misc_func_recorded)
2293 record_minimal_symbol
2294 (last_csect_name, last_csect_val,
2295 mst_text, last_csect_sec, objfile);
2296 misc_func_recorded = 1;
2301 /* We have to allocate one psymtab for
2302 each program csect, because their text
2303 sections need not be adjacent. */
2305 (objfile, pst, psymtab_include_list,
2306 includes_used, symnum_before, dependency_list,
2307 dependencies_used, textlow_not_set);
2309 dependencies_used = 0;
2310 /* Give all psymtabs for this source file the same
2312 pst = xcoff_start_psymtab
2316 objfile->global_psymbols.next,
2317 objfile->static_psymbols.next);
2320 /* Activate the misc_func_recorded mechanism for
2321 compiler- and linker-generated CSECTs like ".strcmp"
2323 if (namestring && (namestring[0] == '.'
2324 || namestring[0] == '@'))
2326 last_csect_name = namestring;
2327 last_csect_val = symbol.n_value;
2328 last_csect_sec = symbol.n_scnum;
2333 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2335 if (highval > pst->texthigh)
2336 pst->texthigh = highval;
2337 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2338 pst->textlow = symbol.n_value;
2340 misc_func_recorded = 0;
2345 /* Data variables are recorded in the minimal symbol
2346 table, except for section symbols. */
2347 if (*namestring != '.')
2348 prim_record_minimal_symbol_and_info
2349 (namestring, symbol.n_value,
2350 sclass == C_HIDEXT ? mst_file_data : mst_data,
2351 secnum_to_section (symbol.n_scnum, objfile),
2352 secnum_to_bfd_section (symbol.n_scnum, objfile),
2358 warning (_("More than one XMC_TC0 symbol found."));
2359 toc_offset = symbol.n_value;
2361 /* Make TOC offset relative to start address of
2363 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2365 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2369 /* These symbols tell us where the TOC entry for a
2370 variable is, not the variable itself. */
2379 switch (csect_aux.x_csect.x_smclas)
2382 /* A function entry point. */
2384 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2385 first_fun_line_offset =
2386 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2388 record_minimal_symbol
2389 (namestring, symbol.n_value,
2390 sclass == C_HIDEXT ? mst_file_text : mst_text,
2391 symbol.n_scnum, objfile);
2392 misc_func_recorded = 1;
2397 /* shared library function trampoline code entry
2400 /* record trampoline code entries as
2401 mst_solib_trampoline symbol. When we lookup mst
2402 symbols, we will choose mst_text over
2403 mst_solib_trampoline. */
2404 record_minimal_symbol
2405 (namestring, symbol.n_value,
2406 mst_solib_trampoline, symbol.n_scnum, objfile);
2407 misc_func_recorded = 1;
2411 /* The symbols often have the same names as
2412 debug symbols for functions, and confuse
2418 /* xlc puts each variable in a separate csect,
2419 so we get an XTY_SD for each variable. But
2420 gcc puts several variables in a csect, so
2421 that each variable only gets an XTY_LD. We
2422 still need to record them. This will
2423 typically be XMC_RW; I suspect XMC_RO and
2424 XMC_BS might be possible too. */
2425 if (*namestring != '.')
2426 prim_record_minimal_symbol_and_info
2427 (namestring, symbol.n_value,
2428 sclass == C_HIDEXT ? mst_file_data : mst_data,
2429 secnum_to_section (symbol.n_scnum, objfile),
2430 secnum_to_bfd_section (symbol.n_scnum, objfile),
2437 switch (csect_aux.x_csect.x_smclas)
2441 /* Common variables are recorded in the minimal symbol
2442 table, except for section symbols. */
2443 if (*namestring != '.')
2444 prim_record_minimal_symbol_and_info
2445 (namestring, symbol.n_value,
2446 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2447 secnum_to_section (symbol.n_scnum, objfile),
2448 secnum_to_bfd_section (symbol.n_scnum, objfile),
2461 unsigned int symnum_before;
2463 symnum_before = ssymnum;
2464 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2467 /* See if the last csect needs to be recorded. */
2469 if (last_csect_name && !misc_func_recorded)
2471 /* If no misc. function recorded in the last seen csect, enter
2472 it as a function. This will take care of functions like
2473 strcmp() compiled by xlc. */
2475 record_minimal_symbol (last_csect_name, last_csect_val,
2476 mst_text, last_csect_sec, objfile);
2477 misc_func_recorded = 1;
2482 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2483 includes_used, symnum_before,
2484 dependency_list, dependencies_used,
2487 dependencies_used = 0;
2489 first_fun_line_offset = 0;
2491 /* XCOFF, according to the AIX 3.2 documentation, puts the
2492 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2493 do things the standard COFF way and put it in the auxent.
2494 We use the auxent if the symbol is ".file" and an auxent
2495 exists, otherwise use the symbol itself. */
2496 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2498 filestring = coff_getfilename (&main_aux[0], objfile);
2501 filestring = namestring;
2503 pst = xcoff_start_psymtab (objfile,
2506 objfile->global_psymbols.next,
2507 objfile->static_psymbols.next);
2508 last_csect_name = NULL;
2514 complaint (&symfile_complaints,
2515 _("Storage class %d not recognized during scan"),
2520 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2521 to handle only the C_FUN and C_EXT. */
2536 /* C_EINCL means we are switching back to the main file. But there
2537 is no reason to care; the only thing we want to know about
2538 includes is the names of all the included (.h) files. */
2543 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2547 /* I don't think the name of the common block (as opposed to the
2548 variables within it) is something which is user visible
2556 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2557 so C_LSYM would appear to be only for locals. */
2563 /* We probably could save a few instructions by assuming that
2564 C_LSYM, C_PSYM, etc., never have auxents. */
2565 int naux1 = symbol.n_numaux + 1;
2568 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2574 /* Mark down an include file in the current psymtab. */
2575 enum language tmp_language;
2577 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2580 tmp_language = deduce_language_from_filename (namestring);
2582 /* Only change the psymtab's language if we've learned
2583 something useful (eg. tmp_language is not language_unknown).
2584 In addition, to match what start_subfile does, never change
2586 if (tmp_language != language_unknown
2587 && (tmp_language != language_c
2588 || psymtab_language != language_cplus))
2589 psymtab_language = tmp_language;
2591 /* In C++, one may expect the same filename to come round many
2592 times, when code is coming alternately from the main file
2593 and from inline functions in other files. So I check to see
2594 if this is a file we've seen before -- either the main
2595 source file, or a previously included file.
2597 This seems to be a lot of time to be spending on N_SOL, but
2598 things like "break c-exp.y:435" need to work (I
2599 suppose the psymtab_include_list could be hashed or put
2600 in a binary tree, if profiling shows this is a major hog). */
2601 if (pst && strcmp (namestring, pst->filename) == 0)
2607 for (i = 0; i < includes_used; i++)
2608 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2616 psymtab_include_list[includes_used++] = namestring;
2617 if (includes_used >= includes_allocated)
2619 const char **orig = psymtab_include_list;
2621 psymtab_include_list = (const char **)
2622 alloca ((includes_allocated *= 2) *
2623 sizeof (const char *));
2624 memcpy (psymtab_include_list, orig,
2625 includes_used * sizeof (const char *));
2630 /* The value of the C_FUN is not the address of the function (it
2631 appears to be the address before linking), but as long as it
2632 is smaller than the actual address, then find_pc_partial_function
2633 will use the minimal symbols instead. I hope. */
2642 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2645 p = strchr (namestring, ':');
2647 continue; /* Not a debugging symbol. */
2649 /* Main processing section for debugging symbols which
2650 the initial read through the symbol tables needs to worry
2651 about. If we reach this point, the symbol which we are
2652 considering is definitely one we are interested in.
2653 p must also contain the (valid) index into the namestring
2654 which indicates the debugging type symbol. */
2659 symbol.n_value += ANOFFSET (objfile->section_offsets,
2660 SECT_OFF_DATA (objfile));
2662 if (gdbarch_static_transform_name_p (gdbarch))
2663 namestring = gdbarch_static_transform_name
2664 (gdbarch, namestring);
2666 add_psymbol_to_list (namestring, p - namestring, 1,
2667 VAR_DOMAIN, LOC_STATIC,
2668 &objfile->static_psymbols,
2670 psymtab_language, objfile);
2674 symbol.n_value += ANOFFSET (objfile->section_offsets,
2675 SECT_OFF_DATA (objfile));
2676 /* The addresses in these entries are reported to be
2677 wrong. See the code that reads 'G's for symtabs. */
2678 add_psymbol_to_list (namestring, p - namestring, 1,
2679 VAR_DOMAIN, LOC_STATIC,
2680 &objfile->global_psymbols,
2682 psymtab_language, objfile);
2686 /* When a 'T' entry is defining an anonymous enum, it
2687 may have a name which is the empty string, or a
2688 single space. Since they're not really defining a
2689 symbol, those shouldn't go in the partial symbol
2690 table. We do pick up the elements of such enums at
2691 'check_enum:', below. */
2692 if (p >= namestring + 2
2693 || (p == namestring + 1
2694 && namestring[0] != ' '))
2696 add_psymbol_to_list (namestring, p - namestring, 1,
2697 STRUCT_DOMAIN, LOC_TYPEDEF,
2698 &objfile->static_psymbols,
2700 psymtab_language, objfile);
2703 /* Also a typedef with the same name. */
2704 add_psymbol_to_list (namestring, p - namestring, 1,
2705 VAR_DOMAIN, LOC_TYPEDEF,
2706 &objfile->static_psymbols,
2708 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,
2719 &objfile->static_psymbols,
2721 psymtab_language, objfile);
2724 /* If this is an enumerated type, we need to
2725 add all the enum constants to the partial symbol
2726 table. This does not cover enums without names, e.g.
2727 "enum {a, b} c;" in C, but fortunately those are
2728 rare. There is no way for GDB to find those from the
2729 enum type without spending too much time on it. Thus
2730 to solve this problem, the compiler needs to put out the
2731 enum in a nameless type. GCC2 does this. */
2733 /* We are looking for something of the form
2734 <name> ":" ("t" | "T") [<number> "="] "e"
2735 {<constant> ":" <value> ","} ";". */
2737 /* Skip over the colon and the 't' or 'T'. */
2739 /* This type may be given a number. Also, numbers can come
2740 in pairs like (0,26). Skip over it. */
2741 while ((*p >= '0' && *p <= '9')
2742 || *p == '(' || *p == ',' || *p == ')'
2748 /* The aix4 compiler emits extra crud before the
2752 /* Skip over the type (?). */
2756 /* Skip over the colon. */
2760 /* We have found an enumerated type. */
2761 /* According to comments in read_enum_type
2762 a comma could end it instead of a semicolon.
2763 I don't know where that happens.
2765 while (*p && *p != ';' && *p != ',')
2769 /* Check for and handle cretinous dbx symbol name
2771 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2772 p = next_symbol_text (objfile);
2774 /* Point to the character after the name
2775 of the enum constant. */
2776 for (q = p; *q && *q != ':'; q++)
2778 /* Note that the value doesn't matter for
2779 enum constants in psymtabs, just in symtabs. */
2780 add_psymbol_to_list (p, q - p, 1,
2781 VAR_DOMAIN, LOC_CONST,
2782 &objfile->static_psymbols, 0,
2783 0, psymtab_language, objfile);
2784 /* Point past the name. */
2786 /* Skip over the value. */
2787 while (*p && *p != ',')
2789 /* Advance past the comma. */
2797 /* Constant, e.g. from "const" in Pascal. */
2798 add_psymbol_to_list (namestring, p - namestring, 1,
2799 VAR_DOMAIN, LOC_CONST,
2800 &objfile->static_psymbols, symbol.n_value,
2801 0, psymtab_language, objfile);
2807 int name_len = p - namestring;
2808 char *name = xmalloc (name_len + 1);
2810 memcpy (name, namestring, name_len);
2811 name[name_len] = '\0';
2812 function_outside_compilation_unit_complaint (name);
2815 symbol.n_value += ANOFFSET (objfile->section_offsets,
2816 SECT_OFF_TEXT (objfile));
2817 add_psymbol_to_list (namestring, p - namestring, 1,
2818 VAR_DOMAIN, LOC_BLOCK,
2819 &objfile->static_psymbols,
2821 psymtab_language, objfile);
2824 /* Global functions were ignored here, but now they
2825 are put into the global psymtab like one would expect.
2826 They're also in the minimal symbol table. */
2830 int name_len = p - namestring;
2831 char *name = xmalloc (name_len + 1);
2833 memcpy (name, namestring, name_len);
2834 name[name_len] = '\0';
2835 function_outside_compilation_unit_complaint (name);
2839 /* We need only the minimal symbols for these
2840 loader-generated definitions. Keeping the global
2841 symbols leads to "in psymbols but not in symbols"
2843 if (strncmp (namestring, "@FIX", 4) == 0)
2846 symbol.n_value += ANOFFSET (objfile->section_offsets,
2847 SECT_OFF_TEXT (objfile));
2848 add_psymbol_to_list (namestring, p - namestring, 1,
2849 VAR_DOMAIN, LOC_BLOCK,
2850 &objfile->global_psymbols,
2852 psymtab_language, objfile);
2855 /* Two things show up here (hopefully); static symbols of
2856 local scope (static used inside braces) or extensions
2857 of structure symbols. We can ignore both. */
2871 case '#': /* For symbol identification (used in
2876 /* It is a C++ nested symbol. We don't need to record it
2877 (I don't think); if we try to look up foo::bar::baz,
2878 then symbols for the symtab containing foo should get
2879 read in, I think. */
2880 /* Someone says sun cc puts out symbols like
2881 /foo/baz/maclib::/usr/local/bin/maclib,
2882 which would get here with a symbol type of ':'. */
2886 /* Unexpected symbol descriptor. The second and
2887 subsequent stabs of a continued stab can show up
2888 here. The question is whether they ever can mimic
2889 a normal stab--it would be nice if not, since we
2890 certainly don't want to spend the time searching to
2891 the end of every string looking for a
2894 complaint (&symfile_complaints,
2895 _("unknown symbol descriptor `%c'"), p[1]);
2897 /* Ignore it; perhaps it is an extension that we don't
2907 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2908 ssymnum, dependency_list,
2909 dependencies_used, textlow_not_set);
2912 /* Record the toc offset value of this symbol table into objfile
2913 structure. If no XMC_TC0 is found, toc_offset should be zero.
2914 Another place to obtain this information would be file auxiliary
2917 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2920 /* Return the toc offset value for a given objfile. */
2923 xcoff_get_toc_offset (struct objfile *objfile)
2926 return XCOFF_DATA (objfile)->toc_offset;
2930 /* Scan and build partial symbols for a symbol file.
2931 We have been initialized by a call to dbx_symfile_init, which
2932 put all the relevant info into a "struct dbx_symfile_info",
2933 hung off the objfile structure.
2935 SECTION_OFFSETS contains offsets relative to which the symbols in the
2936 various sections are (depending where the sections were actually
2940 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2944 struct cleanup *back_to;
2945 int num_symbols; /* # of symbols */
2946 file_ptr symtab_offset; /* symbol table and */
2947 file_ptr stringtab_offset; /* string table file offsets */
2948 struct coff_symfile_info *info;
2952 info = XCOFF_DATA (objfile);
2953 symfile_bfd = abfd = objfile->obfd;
2954 name = objfile->name;
2956 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2957 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2958 stringtab_offset = symtab_offset +
2959 num_symbols * coff_data (abfd)->local_symesz;
2961 info->min_lineno_offset = 0;
2962 info->max_lineno_offset = 0;
2963 bfd_map_over_sections (abfd, find_linenos, info);
2965 if (num_symbols > 0)
2967 /* Read the string table. */
2968 init_stringtab (abfd, stringtab_offset, objfile);
2970 /* Read the .debug section, if present. */
2972 struct bfd_section *secp;
2973 bfd_size_type length;
2974 bfd_byte *debugsec = NULL;
2976 secp = bfd_get_section_by_name (abfd, ".debug");
2979 length = bfd_section_size (abfd, secp);
2982 debugsec = obstack_alloc (&objfile->objfile_obstack, length);
2984 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2986 error (_("Error reading .debug section of `%s': %s"),
2987 name, bfd_errmsg (bfd_get_error ()));
2991 info->debugsec = debugsec;
2995 /* Read the symbols. We keep them in core because we will want to
2996 access them randomly in read_symbol*. */
2997 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2999 error (_("Error reading symbols from %s: %s"),
3000 name, bfd_errmsg (bfd_get_error ()));
3001 size = coff_data (abfd)->local_symesz * num_symbols;
3002 info->symtbl = obstack_alloc (&objfile->objfile_obstack, size);
3003 info->symtbl_num_syms = num_symbols;
3005 val = bfd_bread (info->symtbl, size, abfd);
3007 perror_with_name (_("reading symbol table"));
3009 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3010 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 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 free_pending_blocks ();
3018 back_to = make_cleanup (really_free_pendings, 0);
3020 init_minimal_symbol_collection ();
3021 make_cleanup_discard_minimal_symbols ();
3023 /* Now that the symbol table data of the executable file are all in core,
3024 process them and define symbols accordingly. */
3026 scan_xcoff_symtab (objfile);
3028 /* Install any minimal symbols that have been collected as the current
3029 minimal symbols for this objfile. */
3031 install_minimal_symbols (objfile);
3033 /* DWARF2 sections. */
3035 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3036 dwarf2_build_psymtabs (objfile);
3038 dwarf2_build_frame_info (objfile);
3040 do_cleanups (back_to);
3044 xcoff_symfile_offsets (struct objfile *objfile,
3045 struct section_addr_info *addrs)
3047 asection *sect = NULL;
3050 objfile->num_sections = bfd_count_sections (objfile->obfd);
3051 objfile->section_offsets = (struct section_offsets *)
3052 obstack_alloc (&objfile->objfile_obstack,
3053 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
3055 /* Initialize the section indexes for future use. */
3056 sect = bfd_get_section_by_name (objfile->obfd, ".text");
3058 objfile->sect_index_text = sect->index;
3060 sect = bfd_get_section_by_name (objfile->obfd, ".data");
3062 objfile->sect_index_data = sect->index;
3064 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
3066 objfile->sect_index_bss = sect->index;
3068 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
3070 objfile->sect_index_rodata = sect->index;
3072 for (i = 0; i < objfile->num_sections; ++i)
3074 /* syms_from_objfile kindly subtracts from addr the
3075 bfd_section_vma of the .text section. This strikes me as
3076 wrong--whether the offset to be applied to symbol reading is
3077 relative to the start address of the section depends on the
3078 symbol format. In any event, this whole "addr" concept is
3079 pretty broken (it doesn't handle any section but .text
3080 sensibly), so just ignore the addr parameter and use 0.
3081 rs6000-nat.c will set the correct section offsets via
3082 objfile_relocate. */
3083 (objfile->section_offsets)->offsets[i] = 0;
3087 /* Register our ability to parse symbols for xcoff BFD files. */
3089 static const struct sym_fns xcoff_sym_fns =
3092 /* It is possible that coff and xcoff should be merged as
3093 they do have fundamental similarities (for example, the extra storage
3094 classes used for stabs could presumably be recognized in any COFF file).
3095 However, in addition to obvious things like all the csect hair, there are
3096 some subtler differences between xcoffread.c and coffread.c, notably
3097 the fact that coffread.c has no need to read in all the symbols, but
3098 xcoffread.c reads all the symbols and does in fact randomly access them
3099 (in C_BSTAT and line number processing). */
3101 bfd_target_xcoff_flavour,
3103 xcoff_new_init, /* init anything gbl to entire symtab */
3104 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3105 xcoff_initial_scan, /* read a symbol file into symtab */
3106 NULL, /* sym_read_psymbols */
3107 xcoff_symfile_finish, /* finished with file, cleanup */
3108 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3109 default_symfile_segments, /* Get segment information from a file. */
3110 aix_process_linenos,
3111 default_symfile_relocate, /* Relocate a debug section. */
3112 NULL, /* sym_probe_fns */
3116 /* Same as xcoff_get_n_import_files, but for core files. */
3119 xcoff_get_core_n_import_files (bfd *abfd)
3121 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3123 file_ptr offset = 0;
3127 return -1; /* Not a core file. */
3129 for (offset = 0; offset < bfd_get_section_size (sect);)
3135 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3137 next = bfd_get_32 (abfd, buf);
3139 break; /* This is the last entry. */
3143 /* Return the number of entries, excluding the first one, which is
3144 the path to the executable that produced this core file. */
3145 return n_entries - 1;
3148 /* Return the number of import files (shared libraries) that the given
3149 BFD depends on. Return -1 if this number could not be computed. */
3152 xcoff_get_n_import_files (bfd *abfd)
3154 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3158 /* If the ".loader" section does not exist, the objfile is probably
3159 not an executable. Might be a core file... */
3161 return xcoff_get_core_n_import_files (abfd);
3163 /* The number of entries in the Import Files Table is stored in
3164 field l_nimpid. This field is always at offset 16, and is
3165 always 4 bytes long. Read those 4 bytes. */
3167 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3169 l_nimpid = bfd_get_32 (abfd, buf);
3171 /* By convention, the first entry is the default LIBPATH value
3172 to be used by the system loader, so it does not count towards
3173 the number of import files. */
3174 return l_nimpid - 1;
3177 /* Free the per-objfile xcoff data. */
3180 xcoff_free_info (struct objfile *objfile, void *arg)
3185 /* Provide a prototype to silence -Wmissing-prototypes. */
3186 extern initialize_file_ftype _initialize_xcoffread;
3189 _initialize_xcoffread (void)
3191 add_symtab_fns (&xcoff_sym_fns);
3193 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,