1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2013 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #include "gdb_string.h"
29 #ifdef HAVE_SYS_FILE_H
34 #include "coff/internal.h"
35 #include "libcoff.h" /* FIXME, internal data from BFD */
36 #include "coff/xcoff.h"
38 #include "coff/rs6000.h"
39 #include "xcoffread.h"
43 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
47 #include "stabsread.h"
48 #include "expression.h"
49 #include "complaints.h"
52 #include "gdb-stabs.h"
54 /* For interface with stabsread.c. */
55 #include "aout/stab_gnu.h"
58 /* Key for XCOFF-associated data. */
60 static const struct objfile_data *xcoff_objfile_data_key;
62 /* We put a pointer to this structure in the read_symtab_private field
68 /* First symbol number for this file. */
72 /* Number of symbols in the section of the symbol table devoted to
73 this file's symbols (actually, the section bracketed may contain
74 more than just this file's symbols). If numsyms is 0, the only
75 reason for this thing's existence is the dependency list. Nothing
76 else will happen when it is read in. */
80 /* Position of the start of the line number information for this
82 unsigned int lineno_off;
85 /* Remember what we deduced to be the source language of this psymtab. */
87 static enum language psymtab_language = language_unknown;
90 /* Simplified internal version of coff symbol table information. */
95 int c_symnum; /* Symbol number of this entry. */
96 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
98 unsigned char c_sclass;
103 /* Last function's saved coff symbol `cs'. */
105 static struct coff_symbol fcn_cs_saved;
107 static bfd *symfile_bfd;
109 /* Core address of start and end of text of current source file.
110 This is calculated from the first function seen after a C_FILE
114 static CORE_ADDR cur_src_end_addr;
116 /* Core address of the end of the first object file. */
118 static CORE_ADDR first_object_file_end;
120 /* Initial symbol-table-debug-string vector length. */
122 #define INITIAL_STABVECTOR_LENGTH 40
124 /* Nonzero if within a function (so symbols should be local,
125 if nothing says specifically). */
129 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
130 there is any reason not to just use a #define, but might as well
131 ask BFD for the size and store it here, I guess. */
133 static unsigned local_symesz;
135 struct coff_symfile_info
137 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
138 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
140 /* Pointer to the string table. */
143 /* Pointer to debug section. */
146 /* Pointer to the a.out symbol table. */
149 /* Number of symbols in symtbl. */
152 /* Offset in data section to TOC anchor. */
153 CORE_ADDR toc_offset;
156 /* Convenience macro to access the per-objfile XCOFF data. */
158 #define XCOFF_DATA(objfile) \
159 ((struct coff_symfile_info *) objfile_data ((objfile), \
160 xcoff_objfile_data_key))
162 /* XCOFF names for dwarf sections. There is no compressed sections. */
164 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
166 { ".dwabrev", NULL },
169 { NULL, NULL }, /* debug_macinfo */
170 { NULL, NULL }, /* debug_macro */
172 { ".dwrnges", NULL },
173 { NULL, NULL }, /* debug_types */
174 { NULL, NULL }, /* debug_addr */
175 { ".dwframe", NULL },
176 { NULL, NULL }, /* eh_frame */
177 { NULL, NULL }, /* gdb_index */
182 bf_notfound_complaint (void)
184 complaint (&symfile_complaints,
185 _("line numbers off, `.bf' symbol not found"));
189 ef_complaint (int arg1)
191 complaint (&symfile_complaints,
192 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
196 eb_complaint (int arg1)
198 complaint (&symfile_complaints,
199 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
202 static void xcoff_initial_scan (struct objfile *, int);
204 static void scan_xcoff_symtab (struct objfile *);
206 static char *xcoff_next_symbol_text (struct objfile *);
208 static void record_include_begin (struct coff_symbol *);
211 enter_line_range (struct subfile *, unsigned, unsigned,
212 CORE_ADDR, CORE_ADDR, unsigned *);
214 static void init_stringtab (bfd *, file_ptr, struct objfile *);
216 static void xcoff_symfile_init (struct objfile *);
218 static void xcoff_new_init (struct objfile *);
220 static void xcoff_symfile_finish (struct objfile *);
222 static char *coff_getfilename (union internal_auxent *, struct objfile *);
224 static void read_symbol (struct internal_syment *, int);
226 static int read_symbol_lineno (int);
228 static CORE_ADDR read_symbol_nvalue (int);
230 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
233 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
236 static void add_stab_to_list (char *, struct pending_stabs **);
239 static int compare_lte (const void *, const void *);
241 static struct linetable *arrange_linetable (struct linetable *);
243 static void record_include_end (struct coff_symbol *);
245 static void process_linenos (CORE_ADDR, CORE_ADDR);
248 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
250 static int secnum_to_section (int, struct objfile *);
251 static asection *secnum_to_bfd_section (int, struct objfile *);
253 struct find_targ_sec_arg
258 struct objfile *objfile;
261 static void find_targ_sec (bfd *, asection *, void *);
264 find_targ_sec (bfd *abfd, asection *sect, void *obj)
266 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
267 struct objfile *objfile = args->objfile;
269 if (sect->target_index == args->targ_index)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
273 *args->resultp = SECT_OFF_TEXT (objfile);
274 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
275 *args->resultp = SECT_OFF_DATA (objfile);
277 *args->resultp = gdb_bfd_section_index (abfd, sect);
278 *args->bfd_sect = sect;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
292 asection **bfd_sect, int *secnum)
294 struct find_targ_sec_arg args;
296 args.targ_index = n_scnum;
297 args.resultp = secnum;
298 args.bfd_sect = bfd_sect;
299 args.objfile = objfile;
302 *secnum = SECT_OFF_TEXT (objfile);
304 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum, struct objfile *objfile)
315 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
327 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
338 if (*stabvector == NULL)
340 *stabvector = (struct pending_stabs *)
341 xmalloc (sizeof (struct pending_stabs) +
342 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
343 (*stabvector)->count = 0;
344 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
346 else if ((*stabvector)->count >= (*stabvector)->length)
348 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
349 *stabvector = (struct pending_stabs *)
350 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
351 (*stabvector)->length * sizeof (char *));
353 (*stabvector)->stab[(*stabvector)->count++] = stabname;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
413 /* compare line table entry addresses. */
416 compare_lte (const void *lte1p, const void *lte2p)
418 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
419 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
421 return lte1->pc - lte2->pc;
424 /* Given a line table with function entries are marked, arrange its
425 functions in ascending order and strip off function entry markers
426 and return it in a newly created table. If the old one is good
427 enough, return the old one. */
428 /* FIXME: I think all this stuff can be replaced by just passing
429 sort_linevec = 1 to end_symtab. */
431 static struct linetable *
432 arrange_linetable (struct linetable *oldLineTb)
434 int ii, jj, newline, /* new line count */
435 function_count; /* # of functions */
437 struct linetable_entry *fentry; /* function entry vector */
438 int fentry_size; /* # of function entries */
439 struct linetable *newLineTb; /* new line table */
441 #define NUM_OF_FUNCTIONS 20
443 fentry_size = NUM_OF_FUNCTIONS;
444 fentry = (struct linetable_entry *)
445 xmalloc (fentry_size * sizeof (struct linetable_entry));
447 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
449 if (oldLineTb->item[ii].line == 0)
450 { /* Function entry found. */
451 if (function_count >= fentry_size)
452 { /* Make sure you have room. */
454 fentry = (struct linetable_entry *)
456 fentry_size * sizeof (struct linetable_entry));
458 fentry[function_count].line = ii;
459 fentry[function_count].pc = oldLineTb->item[ii].pc;
464 if (function_count == 0)
469 else if (function_count > 1)
470 qsort (fentry, function_count,
471 sizeof (struct linetable_entry), compare_lte);
473 /* Allocate a new line table. */
474 newLineTb = (struct linetable *)
476 (sizeof (struct linetable) +
477 (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
479 /* If line table does not start with a function beginning, copy up until
483 if (oldLineTb->item[0].line != 0)
485 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
486 newLineTb->item[newline] = oldLineTb->item[newline];
488 /* Now copy function lines one by one. */
490 for (ii = 0; ii < function_count; ++ii)
492 for (jj = fentry[ii].line + 1;
493 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
495 newLineTb->item[newline] = oldLineTb->item[jj];
498 newLineTb->nitems = oldLineTb->nitems - function_count;
502 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
503 following `IncludeChain'. At the end of each symtab (end_symtab),
504 we will determine if we should create additional symtab's to
505 represent if (the include files. */
508 typedef struct _inclTable
510 char *name; /* include filename */
512 /* Offsets to the line table. end points to the last entry which is
513 part of this include file. */
516 struct subfile *subfile;
517 unsigned funStartLine; /* Start line # of its function. */
521 #define INITIAL_INCLUDE_TABLE_LENGTH 20
522 static InclTable *inclTable; /* global include table */
523 static int inclIndx; /* last entry to table */
524 static int inclLength; /* table length */
525 static int inclDepth; /* nested include depth */
527 static void allocate_include_entry (void);
530 record_include_begin (struct coff_symbol *cs)
534 /* In xcoff, we assume include files cannot be nested (not in .c files
535 of course, but in corresponding .s files.). */
537 /* This can happen with old versions of GCC.
538 GCC 2.3.3-930426 does not exhibit this on a test case which
539 a user said produced the message for him. */
540 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
544 allocate_include_entry ();
546 inclTable[inclIndx].name = cs->c_name;
547 inclTable[inclIndx].begin = cs->c_value;
551 record_include_end (struct coff_symbol *cs)
557 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
560 allocate_include_entry ();
562 pTbl = &inclTable[inclIndx];
563 pTbl->end = cs->c_value;
570 allocate_include_entry (void)
572 if (inclTable == NULL)
574 inclTable = (InclTable *)
575 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
577 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
578 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
581 else if (inclIndx >= inclLength)
583 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
584 inclTable = (InclTable *)
585 xrealloc (inclTable, sizeof (InclTable) * inclLength);
586 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
587 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
591 /* Global variable to pass the psymtab down to all the routines involved
592 in psymtab to symtab processing. */
593 static struct partial_symtab *this_symtab_psymtab;
595 /* Objfile related to this_symtab_psymtab; set at the same time. */
596 static struct objfile *this_symtab_objfile;
598 /* given the start and end addresses of a compilation unit (or a csect,
599 at times) process its lines and create appropriate line vectors. */
602 process_linenos (CORE_ADDR start, CORE_ADDR end)
606 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
608 /* subfile structure for the main compilation unit. */
609 struct subfile main_subfile;
611 /* In the main source file, any time we see a function entry, we
612 reset this variable to function's absolute starting line number.
613 All the following line numbers in the function are relative to
614 this, and we record absolute line numbers in record_line(). */
616 unsigned int main_source_baseline = 0;
621 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
623 goto return_after_cleanup;
625 memset (&main_subfile, '\0', sizeof (main_subfile));
628 /* All source lines were in the main source file. None in include
631 enter_line_range (&main_subfile, offset, 0, start, end,
632 &main_source_baseline);
636 /* There was source with line numbers in include files. */
639 coff_data (this_symtab_objfile->obfd)->local_linesz;
640 main_source_baseline = 0;
642 for (ii = 0; ii < inclIndx; ++ii)
644 struct subfile *tmpSubfile;
646 /* If there is main file source before include file, enter it. */
647 if (offset < inclTable[ii].begin)
650 (&main_subfile, offset, inclTable[ii].begin - linesz,
651 start, 0, &main_source_baseline);
654 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
656 /* The entry in the include table refers to the main source
657 file. Add the lines to the main subfile. */
659 main_source_baseline = inclTable[ii].funStartLine;
661 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
662 start, 0, &main_source_baseline);
663 inclTable[ii].subfile = &main_subfile;
667 /* Have a new subfile for the include file. */
669 tmpSubfile = inclTable[ii].subfile =
670 (struct subfile *) xmalloc (sizeof (struct subfile));
672 memset (tmpSubfile, '\0', sizeof (struct subfile));
673 firstLine = &(inclTable[ii].funStartLine);
675 /* Enter include file's lines now. */
676 enter_line_range (tmpSubfile, inclTable[ii].begin,
677 inclTable[ii].end, start, 0, firstLine);
680 if (offset <= inclTable[ii].end)
681 offset = inclTable[ii].end + linesz;
684 /* All the include files' line have been processed at this point. Now,
685 enter remaining lines of the main file, if any left. */
686 if (offset < max_offset + 1 - linesz)
688 enter_line_range (&main_subfile, offset, 0, start, end,
689 &main_source_baseline);
693 /* Process main file's line numbers. */
694 if (main_subfile.line_vector)
696 struct linetable *lineTb, *lv;
698 lv = main_subfile.line_vector;
700 /* Line numbers are not necessarily ordered. xlc compilation will
701 put static function to the end. */
703 lineTb = arrange_linetable (lv);
706 current_subfile->line_vector = (struct linetable *)
707 xrealloc (lv, (sizeof (struct linetable)
708 + lv->nitems * sizeof (struct linetable_entry)));
713 current_subfile->line_vector = lineTb;
716 current_subfile->line_vector_length =
717 current_subfile->line_vector->nitems;
720 /* Now, process included files' line numbers. */
722 for (ii = 0; ii < inclIndx; ++ii)
724 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
725 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
728 struct linetable *lineTb, *lv;
730 lv = (inclTable[ii].subfile)->line_vector;
732 /* Line numbers are not necessarily ordered. xlc compilation will
733 put static function to the end. */
735 lineTb = arrange_linetable (lv);
739 /* For the same include file, we might want to have more than one
740 subfile. This happens if we have something like:
748 while foo.h including code in it. (stupid but possible)
749 Since start_subfile() looks at the name and uses an
750 existing one if finds, we need to provide a fake name and
754 start_subfile (inclTable[ii].name, (char *) 0);
757 /* Pick a fake name that will produce the same results as this
758 one when passed to deduce_language_from_filename. Kludge on
760 char *fakename = strrchr (inclTable[ii].name, '.');
762 if (fakename == NULL)
764 start_subfile (fakename, (char *) 0);
765 xfree (current_subfile->name);
767 current_subfile->name = xstrdup (inclTable[ii].name);
772 current_subfile->line_vector =
773 (struct linetable *) xrealloc
774 (lv, (sizeof (struct linetable)
775 + lv->nitems * sizeof (struct linetable_entry)));
781 current_subfile->line_vector = lineTb;
784 current_subfile->line_vector_length =
785 current_subfile->line_vector->nitems;
786 start_subfile (pop_subfile (), (char *) 0);
790 return_after_cleanup:
792 /* We don't want to keep alloc/free'ing the global include file table. */
795 /* Start with a fresh subfile structure for the next file. */
796 memset (&main_subfile, '\0', sizeof (struct subfile));
800 aix_process_linenos (void)
802 /* There is no linenos to read if there are only dwarf info. */
803 if (this_symtab_psymtab == NULL)
806 /* Process line numbers and enter them into line vector. */
807 process_linenos (last_source_start_addr, cur_src_end_addr);
811 /* Enter a given range of lines into the line vector.
812 can be called in the following two ways:
813 enter_line_range (subfile, beginoffset, endoffset,
814 startaddr, 0, firstLine) or
815 enter_line_range (subfile, beginoffset, 0,
816 startaddr, endaddr, firstLine)
818 endoffset points to the last line table entry that we should pay
822 enter_line_range (struct subfile *subfile, unsigned beginoffset,
823 unsigned endoffset, /* offsets to line table */
824 CORE_ADDR startaddr, /* offsets to line table */
825 CORE_ADDR endaddr, unsigned *firstLine)
827 struct objfile *objfile = this_symtab_objfile;
828 struct gdbarch *gdbarch = get_objfile_arch (objfile);
829 unsigned int curoffset;
832 struct internal_lineno int_lnno;
833 unsigned int limit_offset;
837 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
839 curoffset = beginoffset;
840 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
844 if (endoffset >= limit_offset)
846 complaint (&symfile_complaints,
847 _("Bad line table offset in C_EINCL directive"));
850 limit_offset = endoffset;
855 abfd = objfile->obfd;
856 linesz = coff_data (abfd)->local_linesz;
857 ext_lnno = alloca (linesz);
859 while (curoffset <= limit_offset)
861 bfd_seek (abfd, curoffset, SEEK_SET);
862 bfd_bread (ext_lnno, linesz, abfd);
863 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
865 /* Find the address this line represents. */
866 addr = (int_lnno.l_lnno
867 ? int_lnno.l_addr.l_paddr
868 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
869 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
871 if (addr < startaddr || (endaddr && addr >= endaddr))
874 if (int_lnno.l_lnno == 0)
876 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
877 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
881 record_line (subfile, *firstLine + int_lnno.l_lnno,
882 gdbarch_addr_bits_remove (gdbarch, addr));
888 /* Save the vital information for use when closing off the current file.
889 NAME is the file name the symbols came from, START_ADDR is the first
890 text address for the file, and SIZE is the number of bytes of text. */
892 #define complete_symtab(name, start_addr) { \
893 set_last_source_file (name); \
894 last_source_start_addr = start_addr; \
898 /* Refill the symbol table input buffer
899 and set the variables that control fetching entries from it.
900 Reports an error if no data available.
901 This function can read past the end of the symbol table
902 (into the string table) but this does no harm. */
904 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
906 Creation of all new minimal symbols should go through this function
907 rather than calling the various prim_record_[...] functions in order
908 to make sure that all symbol addresses get properly relocated.
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, prior to relocation. This function
915 relocates the address before recording the minimal symbol.
916 MS_TYPE - the symbol's type.
917 N_SCNUM - the symbol's XCOFF section number.
918 OBJFILE - the objfile associated with the minimal symbol. */
921 record_minimal_symbol (const char *name, CORE_ADDR address,
922 enum minimal_symbol_type ms_type,
924 struct objfile *objfile)
926 int section = secnum_to_section (n_scnum, objfile);
931 address += ANOFFSET (objfile->section_offsets, section);
932 prim_record_minimal_symbol_and_info (name, address, ms_type,
933 secnum_to_section (n_scnum, objfile),
937 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
938 nested. At any given time, a symbol can only be in one static block.
939 This is the base address of current static block, zero if non exists. */
941 static int static_block_base = 0;
943 /* Section number for the current static block. */
945 static int static_block_section = -1;
947 /* true if space for symbol name has been allocated. */
949 static int symname_alloced = 0;
951 /* Next symbol to read. Pointer into raw seething symbol table. */
953 static char *raw_symbol;
955 /* This is the function which stabsread.c calls to get symbol
959 xcoff_next_symbol_text (struct objfile *objfile)
961 struct internal_syment symbol;
964 /* FIXME: is this the same as the passed arg? */
965 if (this_symtab_objfile)
966 objfile = this_symtab_objfile;
968 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
971 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
973 /* Return something which points to '\0' and hope the symbol reading
974 code does something reasonable. */
977 else if (symbol.n_sclass & 0x80)
979 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
980 raw_symbol += coff_data (objfile->obfd)->local_symesz;
985 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
987 /* Return something which points to '\0' and hope the symbol reading
988 code does something reasonable. */
994 /* Read symbols for a given partial symbol table. */
997 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
999 bfd *abfd = objfile->obfd;
1000 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1001 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1002 char *strtbl = xcoff->strtbl;
1003 char *debugsec = xcoff->debugsec;
1004 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1006 struct internal_syment symbol[1];
1007 union internal_auxent main_aux;
1008 struct coff_symbol cs[1];
1009 CORE_ADDR file_start_addr = 0;
1010 CORE_ADDR file_end_addr = 0;
1012 int next_file_symnum = -1;
1013 unsigned int max_symnum;
1014 int just_started = 1;
1016 int fcn_start_addr = 0;
1018 struct coff_symbol fcn_stab_saved = { 0 };
1020 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1021 union internal_auxent fcn_aux_saved = main_aux;
1022 struct context_stack *new;
1024 char *filestring = " _start_ "; /* Name of the current file. */
1026 const char *last_csect_name; /* Last seen csect's name. */
1028 this_symtab_psymtab = pst;
1029 this_symtab_objfile = objfile;
1031 /* Get the appropriate COFF "constants" related to the file we're
1033 local_symesz = coff_data (abfd)->local_symesz;
1035 set_last_source_file (NULL);
1036 last_csect_name = 0;
1039 start_symtab (filestring, (char *) NULL, file_start_addr);
1040 record_debugformat (debugfmt);
1041 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1043 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1044 first_object_file_end = 0;
1046 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1048 while (symnum < max_symnum)
1050 QUIT; /* make this command interruptable. */
1052 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1053 /* read one symbol into `cs' structure. After processing the
1054 whole symbol table, only string table will be kept in memory,
1055 symbol table and debug section of xcoff will be freed. Thus
1056 we can mark symbols with names in string table as
1061 /* Swap and align the symbol into a reasonable C structure. */
1062 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1064 cs->c_symnum = symnum;
1065 cs->c_naux = symbol->n_numaux;
1066 if (symbol->n_zeroes)
1068 symname_alloced = 0;
1069 /* We must use the original, unswapped, name here so the name field
1070 pointed to by cs->c_name will persist throughout xcoffread. If
1071 we use the new field, it gets overwritten for each symbol. */
1072 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1073 /* If it's exactly E_SYMNMLEN characters long it isn't
1075 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1079 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
1080 strncpy (p, cs->c_name, E_SYMNMLEN);
1081 p[E_SYMNMLEN] = '\0';
1083 symname_alloced = 1;
1086 else if (symbol->n_sclass & 0x80)
1088 cs->c_name = debugsec + symbol->n_offset;
1089 symname_alloced = 0;
1093 /* in string table */
1094 cs->c_name = strtbl + (int) symbol->n_offset;
1095 symname_alloced = 1;
1097 cs->c_value = symbol->n_value;
1098 cs->c_sclass = symbol->n_sclass;
1099 cs->c_secnum = symbol->n_scnum;
1100 cs->c_type = (unsigned) symbol->n_type;
1102 raw_symbol += local_symesz;
1105 /* Save addr of first aux entry. */
1106 raw_auxptr = raw_symbol;
1108 /* Skip all the auxents associated with this symbol. */
1109 for (ii = symbol->n_numaux; ii; --ii)
1111 raw_symbol += coff_data (abfd)->local_auxesz;
1116 /* if symbol name starts with ".$" or "$", ignore it. */
1117 if (cs->c_name[0] == '$'
1118 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1121 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1123 if (get_last_source_file ())
1125 pst->symtab = end_symtab (cur_src_end_addr, objfile,
1126 SECT_OFF_TEXT (objfile));
1131 start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0);
1132 record_debugformat (debugfmt);
1133 cur_src_end_addr = first_object_file_end;
1134 /* Done with all files, everything from here on is globals. */
1137 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1140 /* Dealing with a symbol with a csect entry. */
1142 #define CSECT(PP) ((PP)->x_csect)
1143 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1144 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1145 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1146 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1148 /* Convert the auxent to something we can access. */
1149 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1150 0, cs->c_naux, &main_aux);
1152 switch (CSECT_SMTYP (&main_aux))
1156 /* Ignore all external references. */
1160 /* A section description. */
1162 switch (CSECT_SCLAS (&main_aux))
1168 /* A program csect is seen. We have to allocate one
1169 symbol table for each program csect. Normally gdb
1170 prefers one symtab for each source file. In case
1171 of AIX, one source file might include more than one
1172 [PR] csect, and they don't have to be adjacent in
1173 terms of the space they occupy in memory. Thus, one
1174 single source file might get fragmented in the
1175 memory and gdb's file start and end address
1176 approach does not work! GCC (and I think xlc) seem
1177 to put all the code in the unnamed program csect. */
1179 if (last_csect_name)
1181 complete_symtab (filestring, file_start_addr);
1182 cur_src_end_addr = file_end_addr;
1183 end_symtab (file_end_addr, objfile,
1184 SECT_OFF_TEXT (objfile));
1187 /* Give all csects for this source file the same
1189 start_symtab (filestring, NULL, (CORE_ADDR) 0);
1190 record_debugformat (debugfmt);
1193 /* If this is the very first csect seen,
1194 basically `__start'. */
1197 first_object_file_end
1198 = cs->c_value + CSECT_LEN (&main_aux);
1203 cs->c_value + ANOFFSET (objfile->section_offsets,
1204 SECT_OFF_TEXT (objfile));
1205 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1207 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1208 last_csect_name = cs->c_name;
1212 /* All other symbols are put into the minimal symbol
1225 /* Ignore the symbol. */
1233 switch (CSECT_SCLAS (&main_aux))
1236 /* a function entry point. */
1237 function_entry_point:
1239 fcn_start_addr = cs->c_value;
1241 /* save the function header info, which will be used
1242 when `.bf' is seen. */
1244 fcn_aux_saved = main_aux;
1248 /* shared library function trampoline code entry point. */
1252 /* The symbols often have the same names as debug symbols for
1253 functions, and confuse lookup_symbol. */
1257 /* xlc puts each variable in a separate csect, so we get
1258 an XTY_SD for each variable. But gcc puts several
1259 variables in a csect, so that each variable only gets
1260 an XTY_LD. This will typically be XMC_RW; I suspect
1261 XMC_RO and XMC_BS might be possible too.
1262 These variables are put in the minimal symbol table
1269 /* Common symbols are put into the minimal symbol table only. */
1277 /* If explicitly specified as a function, treat is as one. This check
1278 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1279 after the above CSECT check. */
1280 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1282 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1283 0, cs->c_naux, &main_aux);
1284 goto function_entry_point;
1287 switch (cs->c_sclass)
1291 /* c_value field contains symnum of next .file entry in table
1292 or symnum of first global after last .file. */
1294 next_file_symnum = cs->c_value;
1296 /* Complete symbol table for last object file containing
1297 debugging information. */
1299 /* Whether or not there was a csect in the previous file, we
1300 have to call `end_stabs' and `start_stabs' to reset
1301 type_vector, line_vector, etc. structures. */
1303 complete_symtab (filestring, file_start_addr);
1304 cur_src_end_addr = file_end_addr;
1305 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1308 /* XCOFF, according to the AIX 3.2 documentation, puts the
1309 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1310 do things the standard COFF way and put it in the auxent.
1311 We use the auxent if the symbol is ".file" and an auxent
1312 exists, otherwise use the symbol itself. Simple
1314 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1316 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1317 0, cs->c_naux, &main_aux);
1318 filestring = coff_getfilename (&main_aux, objfile);
1321 filestring = cs->c_name;
1324 start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0);
1325 record_debugformat (debugfmt);
1326 last_csect_name = 0;
1328 /* reset file start and end addresses. A compilation unit
1329 with no text (only data) should have zero file
1331 file_start_addr = file_end_addr = 0;
1335 fcn_stab_saved = *cs;
1339 if (strcmp (cs->c_name, ".bf") == 0)
1341 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1342 SECT_OFF_TEXT (objfile));
1344 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1345 0, cs->c_naux, &main_aux);
1347 within_function = 1;
1349 new = push_context (0, fcn_start_addr + off);
1351 new->name = define_symbol
1352 (fcn_cs_saved.c_value + off,
1353 fcn_stab_saved.c_name, 0, 0, objfile);
1354 if (new->name != NULL)
1355 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1357 else if (strcmp (cs->c_name, ".ef") == 0)
1359 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1360 0, cs->c_naux, &main_aux);
1362 /* The value of .ef is the address of epilogue code;
1363 not useful for gdb. */
1364 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1365 contains number of lines to '}' */
1367 if (context_stack_depth <= 0)
1368 { /* We attempted to pop an empty context stack. */
1369 ef_complaint (cs->c_symnum);
1370 within_function = 0;
1373 new = pop_context ();
1374 /* Stack must be empty now. */
1375 if (context_stack_depth > 0 || new == NULL)
1377 ef_complaint (cs->c_symnum);
1378 within_function = 0;
1382 finish_block (new->name, &local_symbols, new->old_blocks,
1384 (fcn_cs_saved.c_value
1385 + fcn_aux_saved.x_sym.x_misc.x_fsize
1386 + ANOFFSET (objfile->section_offsets,
1387 SECT_OFF_TEXT (objfile))),
1389 within_function = 0;
1394 /* Begin static block. */
1396 struct internal_syment symbol;
1398 read_symbol (&symbol, cs->c_value);
1399 static_block_base = symbol.n_value;
1400 static_block_section =
1401 secnum_to_section (symbol.n_scnum, objfile);
1406 /* End of static block. */
1407 static_block_base = 0;
1408 static_block_section = -1;
1419 complaint (&symfile_complaints,
1420 _("Unrecognized storage class %d."),
1435 /* beginning of include file */
1436 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1437 order. Thus, when wee see them, we might not know enough info
1438 to process them. Thus, we'll be saving them into a table
1439 (inclTable) and postpone their processing. */
1441 record_include_begin (cs);
1445 /* End of include file. */
1446 /* See the comment after case C_BINCL. */
1447 record_include_end (cs);
1451 if (strcmp (cs->c_name, ".bb") == 0)
1454 new = push_context (depth,
1456 + ANOFFSET (objfile->section_offsets,
1457 SECT_OFF_TEXT (objfile))));
1459 else if (strcmp (cs->c_name, ".eb") == 0)
1461 if (context_stack_depth <= 0)
1462 { /* We attempted to pop an empty context stack. */
1463 eb_complaint (cs->c_symnum);
1466 new = pop_context ();
1467 if (depth-- != new->depth)
1469 eb_complaint (cs->c_symnum);
1472 if (local_symbols && context_stack_depth > 0)
1474 /* Make a block for the local symbols within. */
1475 finish_block (new->name, &local_symbols, new->old_blocks,
1478 + ANOFFSET (objfile->section_offsets,
1479 SECT_OFF_TEXT (objfile))),
1482 local_symbols = new->locals;
1487 process_xcoff_symbol (cs, objfile);
1492 if (get_last_source_file ())
1496 complete_symtab (filestring, file_start_addr);
1497 cur_src_end_addr = file_end_addr;
1498 s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1499 /* When reading symbols for the last C_FILE of the objfile, try
1500 to make sure that we set pst->symtab to the symtab for the
1501 file, not to the _globals_ symtab. I'm not sure whether this
1502 actually works right or when/if it comes up. */
1503 if (pst->symtab == NULL)
1509 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1510 (SYMBOL2) = (struct symbol *) \
1511 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1512 *(SYMBOL2) = *(SYMBOL1);
1515 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1516 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1517 (NAME), strlen (NAME)))
1520 /* process one xcoff symbol. */
1522 static struct symbol *
1523 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1525 struct symbol onesymbol;
1526 struct symbol *sym = &onesymbol;
1527 struct symbol *sym2 = NULL;
1533 if (cs->c_secnum < 0)
1535 /* The value is a register number, offset within a frame, etc.,
1536 and does not get relocated. */
1542 sec = secnum_to_section (cs->c_secnum, objfile);
1543 off = ANOFFSET (objfile->section_offsets, sec);
1550 initialize_symbol (sym);
1552 /* default assumptions */
1553 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1554 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1555 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1557 if (ISFCN (cs->c_type))
1559 /* At this point, we don't know the type of the function. This
1560 will be patched with the type from its stab entry later on in
1561 patch_block_stabs (), unless the file was compiled without -g. */
1563 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1564 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1566 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1567 SYMBOL_DUP (sym, sym2);
1569 if (cs->c_sclass == C_EXT)
1570 add_symbol_to_list (sym2, &global_symbols);
1571 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1572 add_symbol_to_list (sym2, &file_symbols);
1576 /* In case we can't figure out the type, provide default. */
1577 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1579 switch (cs->c_sclass)
1582 /* The values of functions and global symbols are now resolved
1583 via the global_sym_chain in stabsread.c. */
1585 if (fcn_cs_saved.c_sclass == C_EXT)
1586 add_stab_to_list (name, &global_stabs);
1588 add_stab_to_list (name, &file_stabs);
1592 add_stab_to_list (name, &global_stabs);
1597 common_block_start (cs->c_name, objfile);
1601 common_block_end (objfile);
1605 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1618 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1621 SYMBOL_SECTION (sym) = sec;
1628 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1629 all statics and we need to distinguish file-scope versus
1630 function-scope using within_function. We do this by
1631 changing the string we pass to define_symbol to use 'S'
1632 where we need to, which is not necessarily super-clean,
1633 but seems workable enough. */
1638 pp = strchr (name, ':');
1643 if (*pp == 'V' && !within_function)
1645 sym = define_symbol ((cs->c_value
1646 + ANOFFSET (objfile->section_offsets,
1647 static_block_section)),
1648 cs->c_name, 0, 0, objfile);
1651 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1652 SYMBOL_SECTION (sym) = static_block_section;
1661 /* Extract the file name from the aux entry of a C_FILE symbol.
1662 Result is in static storage and is only good for temporary use. */
1665 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1667 static char buffer[BUFSIZ];
1669 if (aux_entry->x_file.x_n.x_zeroes == 0)
1670 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1671 + aux_entry->x_file.x_n.x_offset));
1674 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1675 buffer[FILNMLEN] = '\0';
1680 /* Set *SYMBOL to symbol number symno in symtbl. */
1682 read_symbol (struct internal_syment *symbol, int symno)
1684 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1685 int nsyms = xcoff->symtbl_num_syms;
1686 char *stbl = xcoff->symtbl;
1688 if (symno < 0 || symno >= nsyms)
1690 complaint (&symfile_complaints, _("Invalid symbol offset"));
1691 symbol->n_value = 0;
1692 symbol->n_scnum = -1;
1695 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1696 stbl + (symno * local_symesz),
1700 /* Get value corresponding to symbol number symno in symtbl. */
1703 read_symbol_nvalue (int symno)
1705 struct internal_syment symbol[1];
1707 read_symbol (symbol, symno);
1708 return symbol->n_value;
1712 /* Find the address of the function corresponding to symno, where
1713 symno is the symbol pointed to by the linetable. */
1716 read_symbol_lineno (int symno)
1718 struct objfile *objfile = this_symtab_objfile;
1719 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1721 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1722 int nsyms = info->symtbl_num_syms;
1723 char *stbl = info->symtbl;
1724 char *strtbl = info->strtbl;
1726 struct internal_syment symbol[1];
1727 union internal_auxent main_aux[1];
1731 bf_notfound_complaint ();
1735 /* Note that just searching for a short distance (e.g. 50 symbols)
1736 is not enough, at least in the following case.
1739 [many .stabx entries]
1740 [a few functions, referring to foo]
1744 What happens here is that the assembler moves the .stabx entries
1745 to right before the ".bf" for foo, but the symbol for "foo" is before
1746 all the stabx entries. See PR gdb/2222. */
1748 /* Maintaining a table of .bf entries might be preferable to this search.
1749 If I understand things correctly it would need to be done only for
1750 the duration of a single psymtab to symtab conversion. */
1751 while (symno < nsyms)
1753 bfd_coff_swap_sym_in (symfile_bfd,
1754 stbl + (symno * local_symesz), symbol);
1755 if (symbol->n_sclass == C_FCN)
1757 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1759 if (strcmp (name, ".bf") == 0)
1762 symno += symbol->n_numaux + 1;
1765 bf_notfound_complaint ();
1769 /* Take aux entry and return its lineno. */
1771 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1772 symbol->n_type, symbol->n_sclass,
1773 0, symbol->n_numaux, main_aux);
1775 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1778 /* Support for line number handling. */
1780 /* This function is called for every section; it finds the outer limits
1781 * of the line table (minimum and maximum file offset) so that the
1782 * mainline code can read the whole thing for efficiency.
1785 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1787 struct coff_symfile_info *info;
1789 file_ptr offset, maxoff;
1791 count = asect->lineno_count;
1793 if (strcmp (asect->name, ".text") != 0 || count == 0)
1796 size = count * coff_data (abfd)->local_linesz;
1797 info = (struct coff_symfile_info *) vpinfo;
1798 offset = asect->line_filepos;
1799 maxoff = offset + size;
1801 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1802 info->min_lineno_offset = offset;
1804 if (maxoff > info->max_lineno_offset)
1805 info->max_lineno_offset = maxoff;
1809 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1811 struct cleanup *old_chain;
1820 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1825 /* Read in all partial symtabs on which this one is dependent. */
1826 for (i = 0; i < pst->number_of_dependencies; i++)
1827 if (!pst->dependencies[i]->readin)
1829 /* Inform about additional files that need to be read in. */
1832 fputs_filtered (" ", gdb_stdout);
1834 fputs_filtered ("and ", gdb_stdout);
1836 printf_filtered ("%s...", pst->dependencies[i]->filename);
1837 wrap_here (""); /* Flush output */
1838 gdb_flush (gdb_stdout);
1840 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1843 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1845 /* Init stuff necessary for reading in symbols. */
1848 old_chain = make_cleanup (really_free_pendings, 0);
1850 read_xcoff_symtab (objfile, pst);
1852 do_cleanups (old_chain);
1858 /* Read in all of the symbols for a given psymtab for real.
1859 Be verbose about it if the user wants that. SELF is not NULL. */
1862 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1867 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1872 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1873 || self->number_of_dependencies)
1875 /* Print the message now, before reading the string table,
1876 to avoid disconcerting pauses. */
1879 printf_filtered ("Reading in symbols for %s...", self->filename);
1880 gdb_flush (gdb_stdout);
1883 next_symbol_text_func = xcoff_next_symbol_text;
1885 xcoff_psymtab_to_symtab_1 (objfile, self);
1887 /* Match with global symbols. This only needs to be done once,
1888 after all of the symtabs and dependencies have been read in. */
1889 scan_file_globals (objfile);
1891 /* Finish up the debug error message. */
1893 printf_filtered ("done.\n");
1898 xcoff_new_init (struct objfile *objfile)
1900 stabsread_new_init ();
1901 buildsym_new_init ();
1904 /* Do initialization in preparation for reading symbols from OBJFILE.
1906 We will only be called if this is an XCOFF or XCOFF-like file.
1907 BFD handles figuring out the format of the file, and code in symfile.c
1908 uses BFD's determination to vector to us. */
1911 xcoff_symfile_init (struct objfile *objfile)
1913 struct coff_symfile_info *xcoff;
1915 /* Allocate struct to keep track of the symfile. */
1916 xcoff = XNEW (struct coff_symfile_info);
1917 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1919 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1920 find this causes a significant slowdown in gdb then we could
1921 set it in the debug symbol readers only when necessary. */
1922 objfile->flags |= OBJF_REORDERED;
1925 /* Perform any local cleanups required when we are done with a particular
1926 objfile. I.E, we are in the process of discarding all symbol information
1927 for an objfile, freeing up all memory held for it, and unlinking the
1928 objfile struct from the global list of known objfiles. */
1931 xcoff_symfile_finish (struct objfile *objfile)
1933 /* Start with a fresh include table for the next objfile. */
1939 inclIndx = inclLength = inclDepth = 0;
1941 dwarf2_free_objfile (objfile);
1946 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1950 unsigned char lengthbuf[4];
1952 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1954 xcoff->strtbl = NULL;
1956 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1957 error (_("cannot seek to string table in %s: %s"),
1958 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1960 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1961 length = bfd_h_get_32 (abfd, lengthbuf);
1963 /* If no string table is needed, then the file may end immediately
1964 after the symbols. Just return with `strtbl' set to NULL. */
1966 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1969 /* Allocate string table from objfile_obstack. We will need this table
1970 as long as we have its symbol table around. */
1972 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1973 xcoff->strtbl = strtbl;
1975 /* Copy length buffer, the first byte is usually zero and is
1976 used for stabs with a name length of zero. */
1977 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1978 if (length == sizeof lengthbuf)
1981 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1983 if (val != length - sizeof lengthbuf)
1984 error (_("cannot read string table from %s: %s"),
1985 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1986 if (strtbl[length - 1] != '\0')
1987 error (_("bad symbol file: string table "
1988 "does not end with null character"));
1993 /* If we have not yet seen a function for this psymtab, this is 0. If we
1994 have seen one, it is the offset in the line numbers of the line numbers
1996 static unsigned int first_fun_line_offset;
1998 /* Allocate and partially fill a partial symtab. It will be
1999 completely filled at the end of the symbol list.
2001 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2002 is the address relative to which its symbols are (incremental) or 0
2005 static struct partial_symtab *
2006 xcoff_start_psymtab (struct objfile *objfile,
2007 const char *filename, int first_symnum,
2008 struct partial_symbol **global_syms,
2009 struct partial_symbol **static_syms)
2011 struct partial_symtab *result =
2012 start_psymtab_common (objfile, objfile->section_offsets,
2014 /* We fill in textlow later. */
2016 global_syms, static_syms);
2018 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2019 sizeof (struct symloc));
2020 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2021 result->read_symtab = xcoff_read_symtab;
2023 /* Deduce the source language from the filename for this psymtab. */
2024 psymtab_language = deduce_language_from_filename (filename);
2029 /* Close off the current usage of PST.
2030 Returns PST, or NULL if the partial symtab was empty and thrown away.
2032 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2034 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2035 are the information for includes and dependencies. */
2037 static struct partial_symtab *
2038 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2039 const char **include_list, int num_includes,
2040 int capping_symbol_number,
2041 struct partial_symtab **dependency_list,
2042 int number_dependencies, int textlow_not_set)
2046 if (capping_symbol_number != -1)
2047 ((struct symloc *) pst->read_symtab_private)->numsyms =
2048 capping_symbol_number
2049 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2050 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2051 first_fun_line_offset;
2052 first_fun_line_offset = 0;
2053 pst->n_global_syms = objfile->global_psymbols.next
2054 - (objfile->global_psymbols.list + pst->globals_offset);
2055 pst->n_static_syms = objfile->static_psymbols.next
2056 - (objfile->static_psymbols.list + pst->statics_offset);
2058 pst->number_of_dependencies = number_dependencies;
2059 if (number_dependencies)
2061 pst->dependencies = (struct partial_symtab **)
2062 obstack_alloc (&objfile->objfile_obstack,
2063 number_dependencies * sizeof (struct partial_symtab *));
2064 memcpy (pst->dependencies, dependency_list,
2065 number_dependencies * sizeof (struct partial_symtab *));
2068 pst->dependencies = 0;
2070 for (i = 0; i < num_includes; i++)
2072 struct partial_symtab *subpst =
2073 allocate_psymtab (include_list[i], objfile);
2075 subpst->section_offsets = pst->section_offsets;
2076 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2077 sizeof (struct symloc));
2078 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2079 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2080 subpst->textlow = 0;
2081 subpst->texthigh = 0;
2083 /* We could save slight bits of space by only making one of these,
2084 shared by the entire set of include files. FIXME-someday. */
2085 subpst->dependencies = (struct partial_symtab **)
2086 obstack_alloc (&objfile->objfile_obstack,
2087 sizeof (struct partial_symtab *));
2088 subpst->dependencies[0] = pst;
2089 subpst->number_of_dependencies = 1;
2091 subpst->globals_offset =
2092 subpst->n_global_syms =
2093 subpst->statics_offset =
2094 subpst->n_static_syms = 0;
2098 subpst->read_symtab = pst->read_symtab;
2101 sort_pst_symbols (objfile, pst);
2103 if (num_includes == 0
2104 && number_dependencies == 0
2105 && pst->n_global_syms == 0
2106 && pst->n_static_syms == 0)
2108 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2109 it is on the obstack, but we can forget to chain it on the list. */
2110 /* Empty psymtabs happen as a result of header files which don't have
2111 any symbols in them. There can be a lot of them. */
2113 discard_psymtab (objfile, pst);
2115 /* Indicate that psymtab was thrown away. */
2116 pst = (struct partial_symtab *) NULL;
2121 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2122 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2123 the symbol and its auxents. */
2126 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2127 const char **name, char **raw, unsigned int *symnump,
2128 struct objfile *objfile)
2130 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2131 if (symbol->n_zeroes)
2133 /* If it's exactly E_SYMNMLEN characters long it isn't
2135 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2137 /* FIXME: wastes memory for symbols which we don't end up putting
2138 into the minimal symbols. */
2141 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2142 strncpy (p, symbol->n_name, E_SYMNMLEN);
2143 p[E_SYMNMLEN] = '\0';
2147 /* Point to the unswapped name as that persists as long as the
2149 *name = ((struct external_syment *) *raw)->e.e_name;
2151 else if (symbol->n_sclass & 0x80)
2153 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2157 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2160 *raw += coff_data (objfile->obfd)->local_symesz;
2161 if (symbol->n_numaux > 0)
2163 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2164 symbol->n_sclass, 0, symbol->n_numaux, aux);
2166 *symnump += symbol->n_numaux;
2167 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2172 function_outside_compilation_unit_complaint (const char *arg1)
2174 complaint (&symfile_complaints,
2175 _("function `%s' appears to be defined "
2176 "outside of all compilation units"),
2181 scan_xcoff_symtab (struct objfile *objfile)
2183 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2184 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2185 const char *filestring = NULL;
2187 const char *namestring;
2188 int past_first_source_file = 0;
2193 /* Current partial symtab */
2194 struct partial_symtab *pst;
2196 /* List of current psymtab's include files. */
2197 const char **psymtab_include_list;
2198 int includes_allocated;
2201 /* Index within current psymtab dependency list. */
2202 struct partial_symtab **dependency_list;
2203 int dependencies_used, dependencies_allocated;
2206 struct internal_syment symbol;
2207 union internal_auxent main_aux[5];
2208 unsigned int ssymnum;
2210 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2211 CORE_ADDR last_csect_val = 0;
2212 int last_csect_sec = 0;
2213 int misc_func_recorded = 0; /* true if any misc. function. */
2214 int textlow_not_set = 1;
2216 pst = (struct partial_symtab *) 0;
2218 includes_allocated = 30;
2220 psymtab_include_list = (const char **) alloca (includes_allocated *
2221 sizeof (const char *));
2223 dependencies_allocated = 30;
2224 dependencies_used = 0;
2226 (struct partial_symtab **) alloca (dependencies_allocated *
2227 sizeof (struct partial_symtab *));
2229 set_last_source_file (NULL);
2231 abfd = objfile->obfd;
2232 next_symbol_text_func = xcoff_next_symbol_text;
2234 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2235 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2237 while (ssymnum < nsyms)
2243 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2244 sclass = symbol.n_sclass;
2251 /* The CSECT auxent--always the last auxent. */
2252 union internal_auxent csect_aux;
2253 unsigned int symnum_before = ssymnum;
2255 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2257 if (symbol.n_numaux > 1)
2259 bfd_coff_swap_aux_in
2261 sraw_symbol - coff_data (abfd)->local_symesz,
2264 symbol.n_numaux - 1,
2269 csect_aux = main_aux[0];
2271 /* If symbol name starts with ".$" or "$", ignore it. */
2272 if (namestring[0] == '$'
2273 || (namestring[0] == '.' && namestring[1] == '$'))
2276 switch (csect_aux.x_csect.x_smtyp & 0x7)
2279 switch (csect_aux.x_csect.x_smclas)
2282 if (last_csect_name)
2284 /* If no misc. function recorded in the last
2285 seen csect, enter it as a function. This
2286 will take care of functions like strcmp()
2289 if (!misc_func_recorded)
2291 record_minimal_symbol
2292 (last_csect_name, last_csect_val,
2293 mst_text, last_csect_sec, objfile);
2294 misc_func_recorded = 1;
2299 /* We have to allocate one psymtab for
2300 each program csect, because their text
2301 sections need not be adjacent. */
2303 (objfile, pst, psymtab_include_list,
2304 includes_used, symnum_before, dependency_list,
2305 dependencies_used, textlow_not_set);
2307 dependencies_used = 0;
2308 /* Give all psymtabs for this source file the same
2310 pst = xcoff_start_psymtab
2314 objfile->global_psymbols.next,
2315 objfile->static_psymbols.next);
2318 /* Activate the misc_func_recorded mechanism for
2319 compiler- and linker-generated CSECTs like ".strcmp"
2321 if (namestring && (namestring[0] == '.'
2322 || namestring[0] == '@'))
2324 last_csect_name = namestring;
2325 last_csect_val = symbol.n_value;
2326 last_csect_sec = symbol.n_scnum;
2331 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2333 if (highval > pst->texthigh)
2334 pst->texthigh = highval;
2335 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2336 pst->textlow = symbol.n_value;
2338 misc_func_recorded = 0;
2343 /* Data variables are recorded in the minimal symbol
2344 table, except for section symbols. */
2345 if (*namestring != '.')
2346 record_minimal_symbol
2347 (namestring, symbol.n_value,
2348 sclass == C_HIDEXT ? mst_file_data : mst_data,
2349 symbol.n_scnum, objfile);
2354 warning (_("More than one XMC_TC0 symbol found."));
2355 toc_offset = symbol.n_value;
2357 /* Make TOC offset relative to start address of
2359 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2361 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2365 /* These symbols tell us where the TOC entry for a
2366 variable is, not the variable itself. */
2375 switch (csect_aux.x_csect.x_smclas)
2378 /* A function entry point. */
2380 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2381 first_fun_line_offset =
2382 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2384 record_minimal_symbol
2385 (namestring, symbol.n_value,
2386 sclass == C_HIDEXT ? mst_file_text : mst_text,
2387 symbol.n_scnum, objfile);
2388 misc_func_recorded = 1;
2393 /* shared library function trampoline code entry
2396 /* record trampoline code entries as
2397 mst_solib_trampoline symbol. When we lookup mst
2398 symbols, we will choose mst_text over
2399 mst_solib_trampoline. */
2400 record_minimal_symbol
2401 (namestring, symbol.n_value,
2402 mst_solib_trampoline, symbol.n_scnum, objfile);
2403 misc_func_recorded = 1;
2407 /* The symbols often have the same names as
2408 debug symbols for functions, and confuse
2414 /* xlc puts each variable in a separate csect,
2415 so we get an XTY_SD for each variable. But
2416 gcc puts several variables in a csect, so
2417 that each variable only gets an XTY_LD. We
2418 still need to record them. This will
2419 typically be XMC_RW; I suspect XMC_RO and
2420 XMC_BS might be possible too. */
2421 if (*namestring != '.')
2422 record_minimal_symbol
2423 (namestring, symbol.n_value,
2424 sclass == C_HIDEXT ? mst_file_data : mst_data,
2425 symbol.n_scnum, objfile);
2431 switch (csect_aux.x_csect.x_smclas)
2435 /* Common variables are recorded in the minimal symbol
2436 table, except for section symbols. */
2437 if (*namestring != '.')
2438 record_minimal_symbol
2439 (namestring, symbol.n_value,
2440 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2441 symbol.n_scnum, objfile);
2453 unsigned int symnum_before;
2455 symnum_before = ssymnum;
2456 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2459 /* See if the last csect needs to be recorded. */
2461 if (last_csect_name && !misc_func_recorded)
2463 /* If no misc. function recorded in the last seen csect, enter
2464 it as a function. This will take care of functions like
2465 strcmp() compiled by xlc. */
2467 record_minimal_symbol (last_csect_name, last_csect_val,
2468 mst_text, last_csect_sec, objfile);
2469 misc_func_recorded = 1;
2474 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2475 includes_used, symnum_before,
2476 dependency_list, dependencies_used,
2479 dependencies_used = 0;
2481 first_fun_line_offset = 0;
2483 /* XCOFF, according to the AIX 3.2 documentation, puts the
2484 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2485 do things the standard COFF way and put it in the auxent.
2486 We use the auxent if the symbol is ".file" and an auxent
2487 exists, otherwise use the symbol itself. */
2488 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2490 filestring = coff_getfilename (&main_aux[0], objfile);
2493 filestring = namestring;
2495 pst = xcoff_start_psymtab (objfile,
2498 objfile->global_psymbols.next,
2499 objfile->static_psymbols.next);
2500 last_csect_name = NULL;
2506 complaint (&symfile_complaints,
2507 _("Storage class %d not recognized during scan"),
2512 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2513 to handle only the C_FUN and C_EXT. */
2528 /* C_EINCL means we are switching back to the main file. But there
2529 is no reason to care; the only thing we want to know about
2530 includes is the names of all the included (.h) files. */
2535 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2539 /* I don't think the name of the common block (as opposed to the
2540 variables within it) is something which is user visible
2548 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2549 so C_LSYM would appear to be only for locals. */
2555 /* We probably could save a few instructions by assuming that
2556 C_LSYM, C_PSYM, etc., never have auxents. */
2557 int naux1 = symbol.n_numaux + 1;
2560 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2566 /* Mark down an include file in the current psymtab. */
2567 enum language tmp_language;
2569 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2572 tmp_language = deduce_language_from_filename (namestring);
2574 /* Only change the psymtab's language if we've learned
2575 something useful (eg. tmp_language is not language_unknown).
2576 In addition, to match what start_subfile does, never change
2578 if (tmp_language != language_unknown
2579 && (tmp_language != language_c
2580 || psymtab_language != language_cplus))
2581 psymtab_language = tmp_language;
2583 /* In C++, one may expect the same filename to come round many
2584 times, when code is coming alternately from the main file
2585 and from inline functions in other files. So I check to see
2586 if this is a file we've seen before -- either the main
2587 source file, or a previously included file.
2589 This seems to be a lot of time to be spending on N_SOL, but
2590 things like "break c-exp.y:435" need to work (I
2591 suppose the psymtab_include_list could be hashed or put
2592 in a binary tree, if profiling shows this is a major hog). */
2593 if (pst && strcmp (namestring, pst->filename) == 0)
2599 for (i = 0; i < includes_used; i++)
2600 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2608 psymtab_include_list[includes_used++] = namestring;
2609 if (includes_used >= includes_allocated)
2611 const char **orig = psymtab_include_list;
2613 psymtab_include_list = (const char **)
2614 alloca ((includes_allocated *= 2) *
2615 sizeof (const char *));
2616 memcpy (psymtab_include_list, orig,
2617 includes_used * sizeof (const char *));
2622 /* The value of the C_FUN is not the address of the function (it
2623 appears to be the address before linking), but as long as it
2624 is smaller than the actual address, then find_pc_partial_function
2625 will use the minimal symbols instead. I hope. */
2634 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2637 p = strchr (namestring, ':');
2639 continue; /* Not a debugging symbol. */
2641 /* Main processing section for debugging symbols which
2642 the initial read through the symbol tables needs to worry
2643 about. If we reach this point, the symbol which we are
2644 considering is definitely one we are interested in.
2645 p must also contain the (valid) index into the namestring
2646 which indicates the debugging type symbol. */
2651 symbol.n_value += ANOFFSET (objfile->section_offsets,
2652 SECT_OFF_DATA (objfile));
2654 if (gdbarch_static_transform_name_p (gdbarch))
2655 namestring = gdbarch_static_transform_name
2656 (gdbarch, namestring);
2658 add_psymbol_to_list (namestring, p - namestring, 1,
2659 VAR_DOMAIN, LOC_STATIC,
2660 &objfile->static_psymbols,
2662 psymtab_language, objfile);
2666 symbol.n_value += ANOFFSET (objfile->section_offsets,
2667 SECT_OFF_DATA (objfile));
2668 /* The addresses in these entries are reported to be
2669 wrong. See the code that reads 'G's for symtabs. */
2670 add_psymbol_to_list (namestring, p - namestring, 1,
2671 VAR_DOMAIN, LOC_STATIC,
2672 &objfile->global_psymbols,
2674 psymtab_language, objfile);
2678 /* When a 'T' entry is defining an anonymous enum, it
2679 may have a name which is the empty string, or a
2680 single space. Since they're not really defining a
2681 symbol, those shouldn't go in the partial symbol
2682 table. We do pick up the elements of such enums at
2683 'check_enum:', below. */
2684 if (p >= namestring + 2
2685 || (p == namestring + 1
2686 && namestring[0] != ' '))
2688 add_psymbol_to_list (namestring, p - namestring, 1,
2689 STRUCT_DOMAIN, LOC_TYPEDEF,
2690 &objfile->static_psymbols,
2692 psymtab_language, objfile);
2695 /* Also a typedef with the same name. */
2696 add_psymbol_to_list (namestring, p - namestring, 1,
2697 VAR_DOMAIN, LOC_TYPEDEF,
2698 &objfile->static_psymbols,
2700 psymtab_language, objfile);
2707 if (p != namestring) /* a name is there, not just :T... */
2709 add_psymbol_to_list (namestring, p - namestring, 1,
2710 VAR_DOMAIN, LOC_TYPEDEF,
2711 &objfile->static_psymbols,
2713 psymtab_language, objfile);
2716 /* If this is an enumerated type, we need to
2717 add all the enum constants to the partial symbol
2718 table. This does not cover enums without names, e.g.
2719 "enum {a, b} c;" in C, but fortunately those are
2720 rare. There is no way for GDB to find those from the
2721 enum type without spending too much time on it. Thus
2722 to solve this problem, the compiler needs to put out the
2723 enum in a nameless type. GCC2 does this. */
2725 /* We are looking for something of the form
2726 <name> ":" ("t" | "T") [<number> "="] "e"
2727 {<constant> ":" <value> ","} ";". */
2729 /* Skip over the colon and the 't' or 'T'. */
2731 /* This type may be given a number. Also, numbers can come
2732 in pairs like (0,26). Skip over it. */
2733 while ((*p >= '0' && *p <= '9')
2734 || *p == '(' || *p == ',' || *p == ')'
2740 /* The aix4 compiler emits extra crud before the
2744 /* Skip over the type (?). */
2748 /* Skip over the colon. */
2752 /* We have found an enumerated type. */
2753 /* According to comments in read_enum_type
2754 a comma could end it instead of a semicolon.
2755 I don't know where that happens.
2757 while (*p && *p != ';' && *p != ',')
2761 /* Check for and handle cretinous dbx symbol name
2763 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2764 p = next_symbol_text (objfile);
2766 /* Point to the character after the name
2767 of the enum constant. */
2768 for (q = p; *q && *q != ':'; q++)
2770 /* Note that the value doesn't matter for
2771 enum constants in psymtabs, just in symtabs. */
2772 add_psymbol_to_list (p, q - p, 1,
2773 VAR_DOMAIN, LOC_CONST,
2774 &objfile->static_psymbols, 0,
2775 0, psymtab_language, objfile);
2776 /* Point past the name. */
2778 /* Skip over the value. */
2779 while (*p && *p != ',')
2781 /* Advance past the comma. */
2789 /* Constant, e.g. from "const" in Pascal. */
2790 add_psymbol_to_list (namestring, p - namestring, 1,
2791 VAR_DOMAIN, LOC_CONST,
2792 &objfile->static_psymbols, symbol.n_value,
2793 0, psymtab_language, objfile);
2799 int name_len = p - namestring;
2800 char *name = xmalloc (name_len + 1);
2802 memcpy (name, namestring, name_len);
2803 name[name_len] = '\0';
2804 function_outside_compilation_unit_complaint (name);
2807 symbol.n_value += ANOFFSET (objfile->section_offsets,
2808 SECT_OFF_TEXT (objfile));
2809 add_psymbol_to_list (namestring, p - namestring, 1,
2810 VAR_DOMAIN, LOC_BLOCK,
2811 &objfile->static_psymbols,
2813 psymtab_language, objfile);
2816 /* Global functions were ignored here, but now they
2817 are put into the global psymtab like one would expect.
2818 They're also in the minimal symbol table. */
2822 int name_len = p - namestring;
2823 char *name = xmalloc (name_len + 1);
2825 memcpy (name, namestring, name_len);
2826 name[name_len] = '\0';
2827 function_outside_compilation_unit_complaint (name);
2831 /* We need only the minimal symbols for these
2832 loader-generated definitions. Keeping the global
2833 symbols leads to "in psymbols but not in symbols"
2835 if (strncmp (namestring, "@FIX", 4) == 0)
2838 symbol.n_value += ANOFFSET (objfile->section_offsets,
2839 SECT_OFF_TEXT (objfile));
2840 add_psymbol_to_list (namestring, p - namestring, 1,
2841 VAR_DOMAIN, LOC_BLOCK,
2842 &objfile->global_psymbols,
2844 psymtab_language, objfile);
2847 /* Two things show up here (hopefully); static symbols of
2848 local scope (static used inside braces) or extensions
2849 of structure symbols. We can ignore both. */
2863 case '#': /* For symbol identification (used in
2868 /* It is a C++ nested symbol. We don't need to record it
2869 (I don't think); if we try to look up foo::bar::baz,
2870 then symbols for the symtab containing foo should get
2871 read in, I think. */
2872 /* Someone says sun cc puts out symbols like
2873 /foo/baz/maclib::/usr/local/bin/maclib,
2874 which would get here with a symbol type of ':'. */
2878 /* Unexpected symbol descriptor. The second and
2879 subsequent stabs of a continued stab can show up
2880 here. The question is whether they ever can mimic
2881 a normal stab--it would be nice if not, since we
2882 certainly don't want to spend the time searching to
2883 the end of every string looking for a
2886 complaint (&symfile_complaints,
2887 _("unknown symbol descriptor `%c'"), p[1]);
2889 /* Ignore it; perhaps it is an extension that we don't
2899 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2900 ssymnum, dependency_list,
2901 dependencies_used, textlow_not_set);
2904 /* Record the toc offset value of this symbol table into objfile
2905 structure. If no XMC_TC0 is found, toc_offset should be zero.
2906 Another place to obtain this information would be file auxiliary
2909 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2912 /* Return the toc offset value for a given objfile. */
2915 xcoff_get_toc_offset (struct objfile *objfile)
2918 return XCOFF_DATA (objfile)->toc_offset;
2922 /* Scan and build partial symbols for a symbol file.
2923 We have been initialized by a call to dbx_symfile_init, which
2924 put all the relevant info into a "struct dbx_symfile_info",
2925 hung off the objfile structure.
2927 SECTION_OFFSETS contains offsets relative to which the symbols in the
2928 various sections are (depending where the sections were actually
2932 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2936 struct cleanup *back_to;
2937 int num_symbols; /* # of symbols */
2938 file_ptr symtab_offset; /* symbol table and */
2939 file_ptr stringtab_offset; /* string table file offsets */
2940 struct coff_symfile_info *info;
2944 info = XCOFF_DATA (objfile);
2945 symfile_bfd = abfd = objfile->obfd;
2946 name = objfile->name;
2948 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2949 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2950 stringtab_offset = symtab_offset +
2951 num_symbols * coff_data (abfd)->local_symesz;
2953 info->min_lineno_offset = 0;
2954 info->max_lineno_offset = 0;
2955 bfd_map_over_sections (abfd, find_linenos, info);
2957 if (num_symbols > 0)
2959 /* Read the string table. */
2960 init_stringtab (abfd, stringtab_offset, objfile);
2962 /* Read the .debug section, if present. */
2964 struct bfd_section *secp;
2965 bfd_size_type length;
2966 bfd_byte *debugsec = NULL;
2968 secp = bfd_get_section_by_name (abfd, ".debug");
2971 length = bfd_section_size (abfd, secp);
2974 debugsec = obstack_alloc (&objfile->objfile_obstack, length);
2976 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2978 error (_("Error reading .debug section of `%s': %s"),
2979 name, bfd_errmsg (bfd_get_error ()));
2983 info->debugsec = (char *) debugsec;
2987 /* Read the symbols. We keep them in core because we will want to
2988 access them randomly in read_symbol*. */
2989 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2991 error (_("Error reading symbols from %s: %s"),
2992 name, bfd_errmsg (bfd_get_error ()));
2993 size = coff_data (abfd)->local_symesz * num_symbols;
2994 info->symtbl = obstack_alloc (&objfile->objfile_obstack, size);
2995 info->symtbl_num_syms = num_symbols;
2997 val = bfd_bread (info->symtbl, size, abfd);
2999 perror_with_name (_("reading symbol table"));
3001 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3002 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3003 /* I'm not sure how how good num_symbols is; the rule of thumb in
3004 init_psymbol_list was developed for a.out. On the one hand,
3005 num_symbols includes auxents. On the other hand, it doesn't
3007 init_psymbol_list (objfile, num_symbols);
3009 free_pending_blocks ();
3010 back_to = make_cleanup (really_free_pendings, 0);
3012 init_minimal_symbol_collection ();
3013 make_cleanup_discard_minimal_symbols ();
3015 /* Now that the symbol table data of the executable file are all in core,
3016 process them and define symbols accordingly. */
3018 scan_xcoff_symtab (objfile);
3020 /* Install any minimal symbols that have been collected as the current
3021 minimal symbols for this objfile. */
3023 install_minimal_symbols (objfile);
3025 /* DWARF2 sections. */
3027 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3028 dwarf2_build_psymtabs (objfile);
3030 dwarf2_build_frame_info (objfile);
3032 do_cleanups (back_to);
3036 xcoff_symfile_offsets (struct objfile *objfile,
3037 const struct section_addr_info *addrs)
3039 const char *first_section_name;
3041 default_symfile_offsets (objfile, addrs);
3043 /* Oneof the weird side-effects of default_symfile_offsets is that
3044 it sometimes sets some section indices to zero for sections that,
3045 in fact do not exist. See the body of default_symfile_offsets
3046 for more info on when that happens. Undo that, as this then allows
3047 us to test whether the associated section exists or not, and then
3048 access it quickly (without searching it again). */
3050 if (objfile->num_sections == 0)
3051 return; /* Is that even possible? Better safe than sorry. */
3054 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3056 if (objfile->sect_index_text == 0
3057 && strcmp (first_section_name, ".text") != 0)
3058 objfile->sect_index_text = -1;
3060 if (objfile->sect_index_data == 0
3061 && strcmp (first_section_name, ".data") != 0)
3062 objfile->sect_index_data = -1;
3064 if (objfile->sect_index_bss == 0
3065 && strcmp (first_section_name, ".bss") != 0)
3066 objfile->sect_index_bss = -1;
3068 if (objfile->sect_index_rodata == 0
3069 && strcmp (first_section_name, ".rodata") != 0)
3070 objfile->sect_index_rodata = -1;
3073 /* Register our ability to parse symbols for xcoff BFD files. */
3075 static const struct sym_fns xcoff_sym_fns =
3078 /* It is possible that coff and xcoff should be merged as
3079 they do have fundamental similarities (for example, the extra storage
3080 classes used for stabs could presumably be recognized in any COFF file).
3081 However, in addition to obvious things like all the csect hair, there are
3082 some subtler differences between xcoffread.c and coffread.c, notably
3083 the fact that coffread.c has no need to read in all the symbols, but
3084 xcoffread.c reads all the symbols and does in fact randomly access them
3085 (in C_BSTAT and line number processing). */
3087 bfd_target_xcoff_flavour,
3089 xcoff_new_init, /* init anything gbl to entire symtab */
3090 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3091 xcoff_initial_scan, /* read a symbol file into symtab */
3092 NULL, /* sym_read_psymbols */
3093 xcoff_symfile_finish, /* finished with file, cleanup */
3094 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3095 default_symfile_segments, /* Get segment information from a file. */
3096 aix_process_linenos,
3097 default_symfile_relocate, /* Relocate a debug section. */
3098 NULL, /* sym_probe_fns */
3102 /* Same as xcoff_get_n_import_files, but for core files. */
3105 xcoff_get_core_n_import_files (bfd *abfd)
3107 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3109 file_ptr offset = 0;
3113 return -1; /* Not a core file. */
3115 for (offset = 0; offset < bfd_get_section_size (sect);)
3121 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3123 next = bfd_get_32 (abfd, buf);
3125 break; /* This is the last entry. */
3129 /* Return the number of entries, excluding the first one, which is
3130 the path to the executable that produced this core file. */
3131 return n_entries - 1;
3134 /* Return the number of import files (shared libraries) that the given
3135 BFD depends on. Return -1 if this number could not be computed. */
3138 xcoff_get_n_import_files (bfd *abfd)
3140 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3144 /* If the ".loader" section does not exist, the objfile is probably
3145 not an executable. Might be a core file... */
3147 return xcoff_get_core_n_import_files (abfd);
3149 /* The number of entries in the Import Files Table is stored in
3150 field l_nimpid. This field is always at offset 16, and is
3151 always 4 bytes long. Read those 4 bytes. */
3153 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3155 l_nimpid = bfd_get_32 (abfd, buf);
3157 /* By convention, the first entry is the default LIBPATH value
3158 to be used by the system loader, so it does not count towards
3159 the number of import files. */
3160 return l_nimpid - 1;
3163 /* Free the per-objfile xcoff data. */
3166 xcoff_free_info (struct objfile *objfile, void *arg)
3171 /* Provide a prototype to silence -Wmissing-prototypes. */
3172 extern initialize_file_ftype _initialize_xcoffread;
3175 _initialize_xcoffread (void)
3177 add_symtab_fns (&xcoff_sym_fns);
3179 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,