1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2014 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data *xcoff_objfile_data_key;
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this
80 unsigned int lineno_off;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language = language_unknown;
88 /* Simplified internal version of coff symbol table information. */
93 int c_symnum; /* Symbol number of this entry. */
94 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
96 unsigned char c_sclass;
101 /* Last function's saved coff symbol `cs'. */
103 static struct coff_symbol fcn_cs_saved;
105 static bfd *symfile_bfd;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end;
118 /* Initial symbol-table-debug-string vector length. */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Nonzero if within a function (so symbols should be local,
123 if nothing says specifically). */
127 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
128 there is any reason not to just use a #define, but might as well
129 ask BFD for the size and store it here, I guess. */
131 static unsigned local_symesz;
133 struct coff_symfile_info
135 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
136 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
138 /* Pointer to the string table. */
141 /* Pointer to debug section. */
144 /* Pointer to the a.out symbol table. */
147 /* Number of symbols in symtbl. */
150 /* Offset in data section to TOC anchor. */
151 CORE_ADDR toc_offset;
154 /* Convenience macro to access the per-objfile XCOFF data. */
156 #define XCOFF_DATA(objfile) \
157 ((struct coff_symfile_info *) objfile_data ((objfile), \
158 xcoff_objfile_data_key))
160 /* XCOFF names for dwarf sections. There is no compressed sections. */
162 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
164 { ".dwabrev", NULL },
167 { NULL, NULL }, /* debug_macinfo */
168 { NULL, NULL }, /* debug_macro */
170 { ".dwrnges", NULL },
171 { NULL, NULL }, /* debug_types */
172 { NULL, NULL }, /* debug_addr */
173 { ".dwframe", NULL },
174 { NULL, NULL }, /* eh_frame */
175 { NULL, NULL }, /* gdb_index */
180 bf_notfound_complaint (void)
182 complaint (&symfile_complaints,
183 _("line numbers off, `.bf' symbol not found"));
187 ef_complaint (int arg1)
189 complaint (&symfile_complaints,
190 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
194 eb_complaint (int arg1)
196 complaint (&symfile_complaints,
197 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
200 static void xcoff_initial_scan (struct objfile *, int);
202 static void scan_xcoff_symtab (struct objfile *);
204 static char *xcoff_next_symbol_text (struct objfile *);
206 static void record_include_begin (struct coff_symbol *);
209 enter_line_range (struct subfile *, unsigned, unsigned,
210 CORE_ADDR, CORE_ADDR, unsigned *);
212 static void init_stringtab (bfd *, file_ptr, struct objfile *);
214 static void xcoff_symfile_init (struct objfile *);
216 static void xcoff_new_init (struct objfile *);
218 static void xcoff_symfile_finish (struct objfile *);
220 static char *coff_getfilename (union internal_auxent *, struct objfile *);
222 static void read_symbol (struct internal_syment *, int);
224 static int read_symbol_lineno (int);
226 static CORE_ADDR read_symbol_nvalue (int);
228 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
231 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
234 static void add_stab_to_list (char *, struct pending_stabs **);
237 static int compare_lte (const void *, const void *);
239 static struct linetable *arrange_linetable (struct linetable *);
241 static void record_include_end (struct coff_symbol *);
243 static void process_linenos (CORE_ADDR, CORE_ADDR);
246 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
248 static int secnum_to_section (int, struct objfile *);
249 static asection *secnum_to_bfd_section (int, struct objfile *);
251 struct find_targ_sec_arg
256 struct objfile *objfile;
259 static void find_targ_sec (bfd *, asection *, void *);
262 find_targ_sec (bfd *abfd, asection *sect, void *obj)
264 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
265 struct objfile *objfile = args->objfile;
267 if (sect->target_index == args->targ_index)
269 /* This is the section. Figure out what SECT_OFF_* code it is. */
270 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
271 *args->resultp = SECT_OFF_TEXT (objfile);
272 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
273 *args->resultp = SECT_OFF_DATA (objfile);
275 *args->resultp = gdb_bfd_section_index (abfd, sect);
276 *args->bfd_sect = sect;
280 /* Search all BFD sections for the section whose target_index is
281 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
282 associated index in the objfile's section_offset table is also
285 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
286 is set to the text section's number. */
289 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
290 asection **bfd_sect, int *secnum)
292 struct find_targ_sec_arg args;
294 args.targ_index = n_scnum;
295 args.resultp = secnum;
296 args.bfd_sect = bfd_sect;
297 args.objfile = objfile;
300 *secnum = SECT_OFF_TEXT (objfile);
302 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
305 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
308 secnum_to_section (int n_scnum, struct objfile *objfile)
313 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
317 /* Return the BFD section that N_SCNUM points to. */
320 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
325 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
329 /* add a given stab string into given stab vector. */
334 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
336 if (*stabvector == NULL)
338 *stabvector = (struct pending_stabs *)
339 xmalloc (sizeof (struct pending_stabs) +
340 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
341 (*stabvector)->count = 0;
342 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
344 else if ((*stabvector)->count >= (*stabvector)->length)
346 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
347 *stabvector = (struct pending_stabs *)
348 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
349 (*stabvector)->length * sizeof (char *));
351 (*stabvector)->stab[(*stabvector)->count++] = stabname;
356 /* Linenos are processed on a file-by-file basis.
360 1) xlc (IBM's native c compiler) postpones static function code
361 emission to the end of a compilation unit. This way it can
362 determine if those functions (statics) are needed or not, and
363 can do some garbage collection (I think). This makes line
364 numbers and corresponding addresses unordered, and we end up
365 with a line table like:
382 and that breaks gdb's binary search on line numbers, if the
383 above table is not sorted on line numbers. And that sort
384 should be on function based, since gcc can emit line numbers
387 10 0x100 - for the init/test part of a for stmt.
390 10 0x400 - for the increment part of a for stmt.
392 arrange_linetable() will do this sorting.
394 2) aix symbol table might look like:
396 c_file // beginning of a new file
397 .bi // beginning of include file
398 .ei // end of include file
402 basically, .bi/.ei pairs do not necessarily encapsulate
403 their scope. They need to be recorded, and processed later
404 on when we come the end of the compilation unit.
405 Include table (inclTable) and process_linenos() handle
411 /* compare line table entry addresses. */
414 compare_lte (const void *lte1p, const void *lte2p)
416 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
417 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
419 return lte1->pc - lte2->pc;
422 /* Given a line table with function entries are marked, arrange its
423 functions in ascending order and strip off function entry markers
424 and return it in a newly created table. If the old one is good
425 enough, return the old one. */
426 /* FIXME: I think all this stuff can be replaced by just passing
427 sort_linevec = 1 to end_symtab. */
429 static struct linetable *
430 arrange_linetable (struct linetable *oldLineTb)
432 int ii, jj, newline, /* new line count */
433 function_count; /* # of functions */
435 struct linetable_entry *fentry; /* function entry vector */
436 int fentry_size; /* # of function entries */
437 struct linetable *newLineTb; /* new line table */
440 #define NUM_OF_FUNCTIONS 20
442 fentry_size = NUM_OF_FUNCTIONS;
443 fentry = (struct linetable_entry *)
444 xmalloc (fentry_size * sizeof (struct linetable_entry));
446 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
448 if (oldLineTb->item[ii].line == 0)
449 { /* Function entry found. */
450 if (function_count >= fentry_size)
451 { /* Make sure you have room. */
453 fentry = (struct linetable_entry *)
455 fentry_size * sizeof (struct linetable_entry));
457 fentry[function_count].line = ii;
458 fentry[function_count].pc = oldLineTb->item[ii].pc;
461 /* If the function was compiled with XLC, we may have to add an
462 extra line entry later. Reserve space for that. */
463 if (ii + 1 < oldLineTb->nitems
464 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
469 if (function_count == 0)
474 else if (function_count > 1)
475 qsort (fentry, function_count,
476 sizeof (struct linetable_entry), compare_lte);
478 /* Allocate a new line table. */
479 newLineTb = (struct linetable *)
481 (sizeof (struct linetable) +
482 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
484 /* If line table does not start with a function beginning, copy up until
488 if (oldLineTb->item[0].line != 0)
490 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
491 newLineTb->item[newline] = oldLineTb->item[newline];
493 /* Now copy function lines one by one. */
495 for (ii = 0; ii < function_count; ++ii)
497 /* If the function was compiled with XLC, we may have to add an
498 extra line to cover the function prologue. */
499 jj = fentry[ii].line;
500 if (jj + 1 < oldLineTb->nitems
501 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
503 newLineTb->item[newline] = oldLineTb->item[jj];
504 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
508 for (jj = fentry[ii].line + 1;
509 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
511 newLineTb->item[newline] = oldLineTb->item[jj];
514 /* The number of items in the line table must include these
515 extra lines which were added in case of XLC compiled functions. */
516 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
520 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
521 following `IncludeChain'. At the end of each symtab (end_symtab),
522 we will determine if we should create additional symtab's to
523 represent if (the include files. */
526 typedef struct _inclTable
528 char *name; /* include filename */
530 /* Offsets to the line table. end points to the last entry which is
531 part of this include file. */
534 struct subfile *subfile;
535 unsigned funStartLine; /* Start line # of its function. */
539 #define INITIAL_INCLUDE_TABLE_LENGTH 20
540 static InclTable *inclTable; /* global include table */
541 static int inclIndx; /* last entry to table */
542 static int inclLength; /* table length */
543 static int inclDepth; /* nested include depth */
545 static void allocate_include_entry (void);
548 record_include_begin (struct coff_symbol *cs)
552 /* In xcoff, we assume include files cannot be nested (not in .c files
553 of course, but in corresponding .s files.). */
555 /* This can happen with old versions of GCC.
556 GCC 2.3.3-930426 does not exhibit this on a test case which
557 a user said produced the message for him. */
558 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
562 allocate_include_entry ();
564 inclTable[inclIndx].name = cs->c_name;
565 inclTable[inclIndx].begin = cs->c_value;
569 record_include_end (struct coff_symbol *cs)
575 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
578 allocate_include_entry ();
580 pTbl = &inclTable[inclIndx];
581 pTbl->end = cs->c_value;
588 allocate_include_entry (void)
590 if (inclTable == NULL)
592 inclTable = (InclTable *)
593 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
595 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
596 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
599 else if (inclIndx >= inclLength)
601 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
602 inclTable = (InclTable *)
603 xrealloc (inclTable, sizeof (InclTable) * inclLength);
604 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
605 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
609 /* Global variable to pass the psymtab down to all the routines involved
610 in psymtab to symtab processing. */
611 static struct partial_symtab *this_symtab_psymtab;
613 /* Objfile related to this_symtab_psymtab; set at the same time. */
614 static struct objfile *this_symtab_objfile;
616 /* given the start and end addresses of a compilation unit (or a csect,
617 at times) process its lines and create appropriate line vectors. */
620 process_linenos (CORE_ADDR start, CORE_ADDR end)
624 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
626 /* subfile structure for the main compilation unit. */
627 struct subfile main_subfile;
629 /* In the main source file, any time we see a function entry, we
630 reset this variable to function's absolute starting line number.
631 All the following line numbers in the function are relative to
632 this, and we record absolute line numbers in record_line(). */
634 unsigned int main_source_baseline = 0;
639 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
641 goto return_after_cleanup;
643 memset (&main_subfile, '\0', sizeof (main_subfile));
646 /* All source lines were in the main source file. None in include
649 enter_line_range (&main_subfile, offset, 0, start, end,
650 &main_source_baseline);
654 /* There was source with line numbers in include files. */
657 coff_data (this_symtab_objfile->obfd)->local_linesz;
658 main_source_baseline = 0;
660 for (ii = 0; ii < inclIndx; ++ii)
662 struct subfile *tmpSubfile;
664 /* If there is main file source before include file, enter it. */
665 if (offset < inclTable[ii].begin)
668 (&main_subfile, offset, inclTable[ii].begin - linesz,
669 start, 0, &main_source_baseline);
672 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
674 /* The entry in the include table refers to the main source
675 file. Add the lines to the main subfile. */
677 main_source_baseline = inclTable[ii].funStartLine;
679 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
680 start, 0, &main_source_baseline);
681 inclTable[ii].subfile = &main_subfile;
685 /* Have a new subfile for the include file. */
687 tmpSubfile = inclTable[ii].subfile =
688 (struct subfile *) xmalloc (sizeof (struct subfile));
690 memset (tmpSubfile, '\0', sizeof (struct subfile));
691 firstLine = &(inclTable[ii].funStartLine);
693 /* Enter include file's lines now. */
694 enter_line_range (tmpSubfile, inclTable[ii].begin,
695 inclTable[ii].end, start, 0, firstLine);
698 if (offset <= inclTable[ii].end)
699 offset = inclTable[ii].end + linesz;
702 /* All the include files' line have been processed at this point. Now,
703 enter remaining lines of the main file, if any left. */
704 if (offset < max_offset + 1 - linesz)
706 enter_line_range (&main_subfile, offset, 0, start, end,
707 &main_source_baseline);
711 /* Process main file's line numbers. */
712 if (main_subfile.line_vector)
714 struct linetable *lineTb, *lv;
716 lv = main_subfile.line_vector;
718 /* Line numbers are not necessarily ordered. xlc compilation will
719 put static function to the end. */
721 lineTb = arrange_linetable (lv);
724 current_subfile->line_vector = (struct linetable *)
725 xrealloc (lv, (sizeof (struct linetable)
726 + lv->nitems * sizeof (struct linetable_entry)));
731 current_subfile->line_vector = lineTb;
734 current_subfile->line_vector_length =
735 current_subfile->line_vector->nitems;
738 /* Now, process included files' line numbers. */
740 for (ii = 0; ii < inclIndx; ++ii)
742 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
743 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
746 struct linetable *lineTb, *lv;
748 lv = (inclTable[ii].subfile)->line_vector;
750 /* Line numbers are not necessarily ordered. xlc compilation will
751 put static function to the end. */
753 lineTb = arrange_linetable (lv);
757 /* For the same include file, we might want to have more than one
758 subfile. This happens if we have something like:
766 while foo.h including code in it. (stupid but possible)
767 Since start_subfile() looks at the name and uses an
768 existing one if finds, we need to provide a fake name and
772 start_subfile (inclTable[ii].name);
775 /* Pick a fake name that will produce the same results as this
776 one when passed to deduce_language_from_filename. Kludge on
778 char *fakename = strrchr (inclTable[ii].name, '.');
780 if (fakename == NULL)
782 start_subfile (fakename);
783 xfree (current_subfile->name);
785 current_subfile->name = xstrdup (inclTable[ii].name);
790 current_subfile->line_vector =
791 (struct linetable *) xrealloc
792 (lv, (sizeof (struct linetable)
793 + lv->nitems * sizeof (struct linetable_entry)));
799 current_subfile->line_vector = lineTb;
802 current_subfile->line_vector_length =
803 current_subfile->line_vector->nitems;
804 start_subfile (pop_subfile ());
808 return_after_cleanup:
810 /* We don't want to keep alloc/free'ing the global include file table. */
815 aix_process_linenos (struct objfile *objfile)
817 /* There is no linenos to read if there are only dwarf info. */
818 if (this_symtab_psymtab == NULL)
821 /* Process line numbers and enter them into line vector. */
822 process_linenos (last_source_start_addr, cur_src_end_addr);
826 /* Enter a given range of lines into the line vector.
827 can be called in the following two ways:
828 enter_line_range (subfile, beginoffset, endoffset,
829 startaddr, 0, firstLine) or
830 enter_line_range (subfile, beginoffset, 0,
831 startaddr, endaddr, firstLine)
833 endoffset points to the last line table entry that we should pay
837 enter_line_range (struct subfile *subfile, unsigned beginoffset,
838 unsigned endoffset, /* offsets to line table */
839 CORE_ADDR startaddr, /* offsets to line table */
840 CORE_ADDR endaddr, unsigned *firstLine)
842 struct objfile *objfile = this_symtab_objfile;
843 struct gdbarch *gdbarch = get_objfile_arch (objfile);
844 unsigned int curoffset;
847 struct internal_lineno int_lnno;
848 unsigned int limit_offset;
852 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
854 curoffset = beginoffset;
855 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
859 if (endoffset >= limit_offset)
861 complaint (&symfile_complaints,
862 _("Bad line table offset in C_EINCL directive"));
865 limit_offset = endoffset;
870 abfd = objfile->obfd;
871 linesz = coff_data (abfd)->local_linesz;
872 ext_lnno = alloca (linesz);
874 while (curoffset <= limit_offset)
876 bfd_seek (abfd, curoffset, SEEK_SET);
877 bfd_bread (ext_lnno, linesz, abfd);
878 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
880 /* Find the address this line represents. */
881 addr = (int_lnno.l_lnno
882 ? int_lnno.l_addr.l_paddr
883 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
884 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
886 if (addr < startaddr || (endaddr && addr >= endaddr))
889 if (int_lnno.l_lnno == 0)
891 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
892 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
896 record_line (subfile, *firstLine + int_lnno.l_lnno,
897 gdbarch_addr_bits_remove (gdbarch, addr));
903 /* Save the vital information for use when closing off the current file.
904 NAME is the file name the symbols came from, START_ADDR is the first
905 text address for the file, and SIZE is the number of bytes of text. */
907 #define complete_symtab(name, start_addr) { \
908 set_last_source_file (name); \
909 last_source_start_addr = start_addr; \
913 /* Refill the symbol table input buffer
914 and set the variables that control fetching entries from it.
915 Reports an error if no data available.
916 This function can read past the end of the symbol table
917 (into the string table) but this does no harm. */
919 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
921 Creation of all new minimal symbols should go through this function
922 rather than calling the various prim_record_[...] functions in order
923 to make sure that all symbol addresses get properly relocated.
927 NAME - the symbol's name (but if NAME starts with a period, that
928 leading period is discarded).
929 ADDRESS - the symbol's address, prior to relocation. This function
930 relocates the address before recording the minimal symbol.
931 MS_TYPE - the symbol's type.
932 N_SCNUM - the symbol's XCOFF section number.
933 OBJFILE - the objfile associated with the minimal symbol. */
936 record_minimal_symbol (const char *name, CORE_ADDR address,
937 enum minimal_symbol_type ms_type,
939 struct objfile *objfile)
941 int section = secnum_to_section (n_scnum, objfile);
946 prim_record_minimal_symbol_and_info (name, address, ms_type,
947 secnum_to_section (n_scnum, objfile),
951 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
952 nested. At any given time, a symbol can only be in one static block.
953 This is the base address of current static block, zero if non exists. */
955 static int static_block_base = 0;
957 /* Section number for the current static block. */
959 static int static_block_section = -1;
961 /* true if space for symbol name has been allocated. */
963 static int symname_alloced = 0;
965 /* Next symbol to read. Pointer into raw seething symbol table. */
967 static char *raw_symbol;
969 /* This is the function which stabsread.c calls to get symbol
973 xcoff_next_symbol_text (struct objfile *objfile)
975 struct internal_syment symbol;
978 /* FIXME: is this the same as the passed arg? */
979 if (this_symtab_objfile)
980 objfile = this_symtab_objfile;
982 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
985 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
987 /* Return something which points to '\0' and hope the symbol reading
988 code does something reasonable. */
991 else if (symbol.n_sclass & 0x80)
993 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
994 raw_symbol += coff_data (objfile->obfd)->local_symesz;
999 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
1001 /* Return something which points to '\0' and hope the symbol reading
1002 code does something reasonable. */
1008 /* Read symbols for a given partial symbol table. */
1011 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1013 bfd *abfd = objfile->obfd;
1014 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1015 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1016 char *strtbl = xcoff->strtbl;
1017 char *debugsec = xcoff->debugsec;
1018 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1020 struct internal_syment symbol[1];
1021 union internal_auxent main_aux;
1022 struct coff_symbol cs[1];
1023 CORE_ADDR file_start_addr = 0;
1024 CORE_ADDR file_end_addr = 0;
1026 int next_file_symnum = -1;
1027 unsigned int max_symnum;
1028 int just_started = 1;
1030 CORE_ADDR fcn_start_addr = 0;
1032 struct coff_symbol fcn_stab_saved = { 0 };
1034 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1035 union internal_auxent fcn_aux_saved = main_aux;
1036 struct context_stack *new;
1038 char *filestring = " _start_ "; /* Name of the current file. */
1040 const char *last_csect_name; /* Last seen csect's name. */
1042 this_symtab_psymtab = pst;
1043 this_symtab_objfile = objfile;
1045 /* Get the appropriate COFF "constants" related to the file we're
1047 local_symesz = coff_data (abfd)->local_symesz;
1049 set_last_source_file (NULL);
1050 last_csect_name = 0;
1053 start_symtab (objfile, filestring, (char *) NULL, file_start_addr);
1054 record_debugformat (debugfmt);
1055 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1057 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1058 first_object_file_end = 0;
1060 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1062 while (symnum < max_symnum)
1064 QUIT; /* make this command interruptable. */
1066 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1067 /* read one symbol into `cs' structure. After processing the
1068 whole symbol table, only string table will be kept in memory,
1069 symbol table and debug section of xcoff will be freed. Thus
1070 we can mark symbols with names in string table as
1075 /* Swap and align the symbol into a reasonable C structure. */
1076 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1078 cs->c_symnum = symnum;
1079 cs->c_naux = symbol->n_numaux;
1080 if (symbol->n_zeroes)
1082 symname_alloced = 0;
1083 /* We must use the original, unswapped, name here so the name field
1084 pointed to by cs->c_name will persist throughout xcoffread. If
1085 we use the new field, it gets overwritten for each symbol. */
1086 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1087 /* If it's exactly E_SYMNMLEN characters long it isn't
1089 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1093 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
1094 strncpy (p, cs->c_name, E_SYMNMLEN);
1095 p[E_SYMNMLEN] = '\0';
1097 symname_alloced = 1;
1100 else if (symbol->n_sclass & 0x80)
1102 cs->c_name = debugsec + symbol->n_offset;
1103 symname_alloced = 0;
1107 /* in string table */
1108 cs->c_name = strtbl + (int) symbol->n_offset;
1109 symname_alloced = 1;
1111 cs->c_value = symbol->n_value;
1112 cs->c_sclass = symbol->n_sclass;
1113 cs->c_secnum = symbol->n_scnum;
1114 cs->c_type = (unsigned) symbol->n_type;
1116 raw_symbol += local_symesz;
1119 /* Save addr of first aux entry. */
1120 raw_auxptr = raw_symbol;
1122 /* Skip all the auxents associated with this symbol. */
1123 for (ii = symbol->n_numaux; ii; --ii)
1125 raw_symbol += coff_data (abfd)->local_auxesz;
1130 /* if symbol name starts with ".$" or "$", ignore it. */
1131 if (cs->c_name[0] == '$'
1132 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1135 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1137 if (get_last_source_file ())
1139 pst->symtab = end_symtab (cur_src_end_addr,
1140 SECT_OFF_TEXT (objfile));
1145 start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0);
1146 record_debugformat (debugfmt);
1147 cur_src_end_addr = first_object_file_end;
1148 /* Done with all files, everything from here on is globals. */
1151 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1154 /* Dealing with a symbol with a csect entry. */
1156 #define CSECT(PP) ((PP)->x_csect)
1157 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1158 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1159 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1160 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1162 /* Convert the auxent to something we can access. */
1163 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1164 0, cs->c_naux, &main_aux);
1166 switch (CSECT_SMTYP (&main_aux))
1170 /* Ignore all external references. */
1174 /* A section description. */
1176 switch (CSECT_SCLAS (&main_aux))
1182 /* A program csect is seen. We have to allocate one
1183 symbol table for each program csect. Normally gdb
1184 prefers one symtab for each source file. In case
1185 of AIX, one source file might include more than one
1186 [PR] csect, and they don't have to be adjacent in
1187 terms of the space they occupy in memory. Thus, one
1188 single source file might get fragmented in the
1189 memory and gdb's file start and end address
1190 approach does not work! GCC (and I think xlc) seem
1191 to put all the code in the unnamed program csect. */
1193 if (last_csect_name)
1195 complete_symtab (filestring, file_start_addr);
1196 cur_src_end_addr = file_end_addr;
1197 end_symtab (file_end_addr,
1198 SECT_OFF_TEXT (objfile));
1201 /* Give all csects for this source file the same
1203 start_symtab (objfile, filestring, NULL,
1205 record_debugformat (debugfmt);
1208 /* If this is the very first csect seen,
1209 basically `__start'. */
1212 first_object_file_end
1213 = cs->c_value + CSECT_LEN (&main_aux);
1218 cs->c_value + ANOFFSET (objfile->section_offsets,
1219 SECT_OFF_TEXT (objfile));
1220 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1222 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1223 last_csect_name = cs->c_name;
1227 /* All other symbols are put into the minimal symbol
1240 /* Ignore the symbol. */
1248 switch (CSECT_SCLAS (&main_aux))
1251 /* a function entry point. */
1252 function_entry_point:
1254 fcn_start_addr = cs->c_value;
1256 /* save the function header info, which will be used
1257 when `.bf' is seen. */
1259 fcn_aux_saved = main_aux;
1263 /* shared library function trampoline code entry point. */
1267 /* The symbols often have the same names as debug symbols for
1268 functions, and confuse lookup_symbol. */
1272 /* xlc puts each variable in a separate csect, so we get
1273 an XTY_SD for each variable. But gcc puts several
1274 variables in a csect, so that each variable only gets
1275 an XTY_LD. This will typically be XMC_RW; I suspect
1276 XMC_RO and XMC_BS might be possible too.
1277 These variables are put in the minimal symbol table
1284 /* Common symbols are put into the minimal symbol table only. */
1292 /* If explicitly specified as a function, treat is as one. This check
1293 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1294 after the above CSECT check. */
1295 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1297 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1298 0, cs->c_naux, &main_aux);
1299 goto function_entry_point;
1302 switch (cs->c_sclass)
1306 /* c_value field contains symnum of next .file entry in table
1307 or symnum of first global after last .file. */
1309 next_file_symnum = cs->c_value;
1311 /* Complete symbol table for last object file containing
1312 debugging information. */
1314 /* Whether or not there was a csect in the previous file, we
1315 have to call `end_stabs' and `start_stabs' to reset
1316 type_vector, line_vector, etc. structures. */
1318 complete_symtab (filestring, file_start_addr);
1319 cur_src_end_addr = file_end_addr;
1320 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1323 /* XCOFF, according to the AIX 3.2 documentation, puts the
1324 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1325 do things the standard COFF way and put it in the auxent.
1326 We use the auxent if the symbol is ".file" and an auxent
1327 exists, otherwise use the symbol itself. Simple
1329 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1331 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1332 0, cs->c_naux, &main_aux);
1333 filestring = coff_getfilename (&main_aux, objfile);
1336 filestring = cs->c_name;
1339 start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0);
1340 record_debugformat (debugfmt);
1341 last_csect_name = 0;
1343 /* reset file start and end addresses. A compilation unit
1344 with no text (only data) should have zero file
1346 file_start_addr = file_end_addr = 0;
1350 fcn_stab_saved = *cs;
1354 if (strcmp (cs->c_name, ".bf") == 0)
1356 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1357 SECT_OFF_TEXT (objfile));
1359 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1360 0, cs->c_naux, &main_aux);
1362 within_function = 1;
1364 new = push_context (0, fcn_start_addr + off);
1366 new->name = define_symbol
1367 (fcn_cs_saved.c_value + off,
1368 fcn_stab_saved.c_name, 0, 0, objfile);
1369 if (new->name != NULL)
1370 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1372 else if (strcmp (cs->c_name, ".ef") == 0)
1374 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1375 0, cs->c_naux, &main_aux);
1377 /* The value of .ef is the address of epilogue code;
1378 not useful for gdb. */
1379 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1380 contains number of lines to '}' */
1382 if (context_stack_depth <= 0)
1383 { /* We attempted to pop an empty context stack. */
1384 ef_complaint (cs->c_symnum);
1385 within_function = 0;
1388 new = pop_context ();
1389 /* Stack must be empty now. */
1390 if (context_stack_depth > 0 || new == NULL)
1392 ef_complaint (cs->c_symnum);
1393 within_function = 0;
1397 finish_block (new->name, &local_symbols, new->old_blocks,
1399 (fcn_cs_saved.c_value
1400 + fcn_aux_saved.x_sym.x_misc.x_fsize
1401 + ANOFFSET (objfile->section_offsets,
1402 SECT_OFF_TEXT (objfile))));
1403 within_function = 0;
1408 /* Begin static block. */
1410 struct internal_syment symbol;
1412 read_symbol (&symbol, cs->c_value);
1413 static_block_base = symbol.n_value;
1414 static_block_section =
1415 secnum_to_section (symbol.n_scnum, objfile);
1420 /* End of static block. */
1421 static_block_base = 0;
1422 static_block_section = -1;
1433 complaint (&symfile_complaints,
1434 _("Unrecognized storage class %d."),
1449 /* beginning of include file */
1450 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1451 order. Thus, when wee see them, we might not know enough info
1452 to process them. Thus, we'll be saving them into a table
1453 (inclTable) and postpone their processing. */
1455 record_include_begin (cs);
1459 /* End of include file. */
1460 /* See the comment after case C_BINCL. */
1461 record_include_end (cs);
1465 if (strcmp (cs->c_name, ".bb") == 0)
1468 new = push_context (depth,
1470 + ANOFFSET (objfile->section_offsets,
1471 SECT_OFF_TEXT (objfile))));
1473 else if (strcmp (cs->c_name, ".eb") == 0)
1475 if (context_stack_depth <= 0)
1476 { /* We attempted to pop an empty context stack. */
1477 eb_complaint (cs->c_symnum);
1480 new = pop_context ();
1481 if (depth-- != new->depth)
1483 eb_complaint (cs->c_symnum);
1486 if (local_symbols && context_stack_depth > 0)
1488 /* Make a block for the local symbols within. */
1489 finish_block (new->name, &local_symbols, new->old_blocks,
1492 + ANOFFSET (objfile->section_offsets,
1493 SECT_OFF_TEXT (objfile))));
1495 local_symbols = new->locals;
1500 process_xcoff_symbol (cs, objfile);
1505 if (get_last_source_file ())
1509 complete_symtab (filestring, file_start_addr);
1510 cur_src_end_addr = file_end_addr;
1511 s = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1512 /* When reading symbols for the last C_FILE of the objfile, try
1513 to make sure that we set pst->symtab to the symtab for the
1514 file, not to the _globals_ symtab. I'm not sure whether this
1515 actually works right or when/if it comes up. */
1516 if (pst->symtab == NULL)
1522 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1523 (SYMBOL2) = (struct symbol *) \
1524 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1525 *(SYMBOL2) = *(SYMBOL1);
1528 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1529 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1530 (NAME), strlen (NAME)))
1533 /* process one xcoff symbol. */
1535 static struct symbol *
1536 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1538 struct symbol onesymbol;
1539 struct symbol *sym = &onesymbol;
1540 struct symbol *sym2 = NULL;
1546 if (cs->c_secnum < 0)
1548 /* The value is a register number, offset within a frame, etc.,
1549 and does not get relocated. */
1555 sec = secnum_to_section (cs->c_secnum, objfile);
1556 off = ANOFFSET (objfile->section_offsets, sec);
1563 initialize_symbol (sym);
1565 /* default assumptions */
1566 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1567 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1568 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1570 if (ISFCN (cs->c_type))
1572 /* At this point, we don't know the type of the function. This
1573 will be patched with the type from its stab entry later on in
1574 patch_block_stabs (), unless the file was compiled without -g. */
1576 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1577 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1579 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1580 SYMBOL_DUP (sym, sym2);
1582 if (cs->c_sclass == C_EXT)
1583 add_symbol_to_list (sym2, &global_symbols);
1584 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1585 add_symbol_to_list (sym2, &file_symbols);
1589 /* In case we can't figure out the type, provide default. */
1590 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1592 switch (cs->c_sclass)
1595 /* The values of functions and global symbols are now resolved
1596 via the global_sym_chain in stabsread.c. */
1598 if (fcn_cs_saved.c_sclass == C_EXT)
1599 add_stab_to_list (name, &global_stabs);
1601 add_stab_to_list (name, &file_stabs);
1605 add_stab_to_list (name, &global_stabs);
1610 common_block_start (cs->c_name, objfile);
1614 common_block_end (objfile);
1618 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1631 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1634 SYMBOL_SECTION (sym) = sec;
1641 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1642 all statics and we need to distinguish file-scope versus
1643 function-scope using within_function. We do this by
1644 changing the string we pass to define_symbol to use 'S'
1645 where we need to, which is not necessarily super-clean,
1646 but seems workable enough. */
1651 pp = strchr (name, ':');
1656 if (*pp == 'V' && !within_function)
1658 sym = define_symbol ((cs->c_value
1659 + ANOFFSET (objfile->section_offsets,
1660 static_block_section)),
1661 cs->c_name, 0, 0, objfile);
1664 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1665 SYMBOL_SECTION (sym) = static_block_section;
1674 /* Extract the file name from the aux entry of a C_FILE symbol.
1675 Result is in static storage and is only good for temporary use. */
1678 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1680 static char buffer[BUFSIZ];
1682 if (aux_entry->x_file.x_n.x_zeroes == 0)
1683 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1684 + aux_entry->x_file.x_n.x_offset));
1687 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1688 buffer[FILNMLEN] = '\0';
1693 /* Set *SYMBOL to symbol number symno in symtbl. */
1695 read_symbol (struct internal_syment *symbol, int symno)
1697 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1698 int nsyms = xcoff->symtbl_num_syms;
1699 char *stbl = xcoff->symtbl;
1701 if (symno < 0 || symno >= nsyms)
1703 complaint (&symfile_complaints, _("Invalid symbol offset"));
1704 symbol->n_value = 0;
1705 symbol->n_scnum = -1;
1708 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1709 stbl + (symno * local_symesz),
1713 /* Get value corresponding to symbol number symno in symtbl. */
1716 read_symbol_nvalue (int symno)
1718 struct internal_syment symbol[1];
1720 read_symbol (symbol, symno);
1721 return symbol->n_value;
1725 /* Find the address of the function corresponding to symno, where
1726 symno is the symbol pointed to by the linetable. */
1729 read_symbol_lineno (int symno)
1731 struct objfile *objfile = this_symtab_objfile;
1732 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1734 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1735 int nsyms = info->symtbl_num_syms;
1736 char *stbl = info->symtbl;
1737 char *strtbl = info->strtbl;
1739 struct internal_syment symbol[1];
1740 union internal_auxent main_aux[1];
1744 bf_notfound_complaint ();
1748 /* Note that just searching for a short distance (e.g. 50 symbols)
1749 is not enough, at least in the following case.
1752 [many .stabx entries]
1753 [a few functions, referring to foo]
1757 What happens here is that the assembler moves the .stabx entries
1758 to right before the ".bf" for foo, but the symbol for "foo" is before
1759 all the stabx entries. See PR gdb/2222. */
1761 /* Maintaining a table of .bf entries might be preferable to this search.
1762 If I understand things correctly it would need to be done only for
1763 the duration of a single psymtab to symtab conversion. */
1764 while (symno < nsyms)
1766 bfd_coff_swap_sym_in (symfile_bfd,
1767 stbl + (symno * local_symesz), symbol);
1768 if (symbol->n_sclass == C_FCN)
1770 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1772 if (strcmp (name, ".bf") == 0)
1775 symno += symbol->n_numaux + 1;
1778 bf_notfound_complaint ();
1782 /* Take aux entry and return its lineno. */
1784 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1785 symbol->n_type, symbol->n_sclass,
1786 0, symbol->n_numaux, main_aux);
1788 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1791 /* Support for line number handling. */
1793 /* This function is called for every section; it finds the outer limits
1794 * of the line table (minimum and maximum file offset) so that the
1795 * mainline code can read the whole thing for efficiency.
1798 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1800 struct coff_symfile_info *info;
1802 file_ptr offset, maxoff;
1804 count = asect->lineno_count;
1806 if (strcmp (asect->name, ".text") != 0 || count == 0)
1809 size = count * coff_data (abfd)->local_linesz;
1810 info = (struct coff_symfile_info *) vpinfo;
1811 offset = asect->line_filepos;
1812 maxoff = offset + size;
1814 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1815 info->min_lineno_offset = offset;
1817 if (maxoff > info->max_lineno_offset)
1818 info->max_lineno_offset = maxoff;
1822 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1824 struct cleanup *old_chain;
1833 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1838 /* Read in all partial symtabs on which this one is dependent. */
1839 for (i = 0; i < pst->number_of_dependencies; i++)
1840 if (!pst->dependencies[i]->readin)
1842 /* Inform about additional files that need to be read in. */
1845 fputs_filtered (" ", gdb_stdout);
1847 fputs_filtered ("and ", gdb_stdout);
1849 printf_filtered ("%s...", pst->dependencies[i]->filename);
1850 wrap_here (""); /* Flush output */
1851 gdb_flush (gdb_stdout);
1853 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1856 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1858 /* Init stuff necessary for reading in symbols. */
1861 old_chain = make_cleanup (really_free_pendings, 0);
1863 read_xcoff_symtab (objfile, pst);
1865 do_cleanups (old_chain);
1871 /* Read in all of the symbols for a given psymtab for real.
1872 Be verbose about it if the user wants that. SELF is not NULL. */
1875 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1880 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1885 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1886 || self->number_of_dependencies)
1888 /* Print the message now, before reading the string table,
1889 to avoid disconcerting pauses. */
1892 printf_filtered ("Reading in symbols for %s...", self->filename);
1893 gdb_flush (gdb_stdout);
1896 next_symbol_text_func = xcoff_next_symbol_text;
1898 xcoff_psymtab_to_symtab_1 (objfile, self);
1900 /* Match with global symbols. This only needs to be done once,
1901 after all of the symtabs and dependencies have been read in. */
1902 scan_file_globals (objfile);
1904 /* Finish up the debug error message. */
1906 printf_filtered ("done.\n");
1911 xcoff_new_init (struct objfile *objfile)
1913 stabsread_new_init ();
1914 buildsym_new_init ();
1917 /* Do initialization in preparation for reading symbols from OBJFILE.
1919 We will only be called if this is an XCOFF or XCOFF-like file.
1920 BFD handles figuring out the format of the file, and code in symfile.c
1921 uses BFD's determination to vector to us. */
1924 xcoff_symfile_init (struct objfile *objfile)
1926 struct coff_symfile_info *xcoff;
1928 /* Allocate struct to keep track of the symfile. */
1929 xcoff = XNEW (struct coff_symfile_info);
1930 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1932 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1933 find this causes a significant slowdown in gdb then we could
1934 set it in the debug symbol readers only when necessary. */
1935 objfile->flags |= OBJF_REORDERED;
1938 /* Perform any local cleanups required when we are done with a particular
1939 objfile. I.E, we are in the process of discarding all symbol information
1940 for an objfile, freeing up all memory held for it, and unlinking the
1941 objfile struct from the global list of known objfiles. */
1944 xcoff_symfile_finish (struct objfile *objfile)
1946 /* Start with a fresh include table for the next objfile. */
1952 inclIndx = inclLength = inclDepth = 0;
1954 dwarf2_free_objfile (objfile);
1959 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1963 unsigned char lengthbuf[4];
1965 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1967 xcoff->strtbl = NULL;
1969 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1970 error (_("cannot seek to string table in %s: %s"),
1971 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1973 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1974 length = bfd_h_get_32 (abfd, lengthbuf);
1976 /* If no string table is needed, then the file may end immediately
1977 after the symbols. Just return with `strtbl' set to NULL. */
1979 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1982 /* Allocate string table from objfile_obstack. We will need this table
1983 as long as we have its symbol table around. */
1985 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1986 xcoff->strtbl = strtbl;
1988 /* Copy length buffer, the first byte is usually zero and is
1989 used for stabs with a name length of zero. */
1990 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1991 if (length == sizeof lengthbuf)
1994 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1996 if (val != length - sizeof lengthbuf)
1997 error (_("cannot read string table from %s: %s"),
1998 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1999 if (strtbl[length - 1] != '\0')
2000 error (_("bad symbol file: string table "
2001 "does not end with null character"));
2006 /* If we have not yet seen a function for this psymtab, this is 0. If we
2007 have seen one, it is the offset in the line numbers of the line numbers
2009 static unsigned int first_fun_line_offset;
2011 /* Allocate and partially fill a partial symtab. It will be
2012 completely filled at the end of the symbol list.
2014 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2015 is the address relative to which its symbols are (incremental) or 0
2018 static struct partial_symtab *
2019 xcoff_start_psymtab (struct objfile *objfile,
2020 const char *filename, int first_symnum,
2021 struct partial_symbol **global_syms,
2022 struct partial_symbol **static_syms)
2024 struct partial_symtab *result =
2025 start_psymtab_common (objfile, objfile->section_offsets,
2027 /* We fill in textlow later. */
2029 global_syms, static_syms);
2031 result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2032 sizeof (struct symloc));
2033 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2034 result->read_symtab = xcoff_read_symtab;
2036 /* Deduce the source language from the filename for this psymtab. */
2037 psymtab_language = deduce_language_from_filename (filename);
2042 /* Close off the current usage of PST.
2043 Returns PST, or NULL if the partial symtab was empty and thrown away.
2045 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2047 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2048 are the information for includes and dependencies. */
2050 static struct partial_symtab *
2051 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2052 const char **include_list, int num_includes,
2053 int capping_symbol_number,
2054 struct partial_symtab **dependency_list,
2055 int number_dependencies, int textlow_not_set)
2059 if (capping_symbol_number != -1)
2060 ((struct symloc *) pst->read_symtab_private)->numsyms =
2061 capping_symbol_number
2062 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2063 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2064 first_fun_line_offset;
2065 first_fun_line_offset = 0;
2066 pst->n_global_syms = objfile->global_psymbols.next
2067 - (objfile->global_psymbols.list + pst->globals_offset);
2068 pst->n_static_syms = objfile->static_psymbols.next
2069 - (objfile->static_psymbols.list + pst->statics_offset);
2071 pst->number_of_dependencies = number_dependencies;
2072 if (number_dependencies)
2074 pst->dependencies = (struct partial_symtab **)
2075 obstack_alloc (&objfile->objfile_obstack,
2076 number_dependencies * sizeof (struct partial_symtab *));
2077 memcpy (pst->dependencies, dependency_list,
2078 number_dependencies * sizeof (struct partial_symtab *));
2081 pst->dependencies = 0;
2083 for (i = 0; i < num_includes; i++)
2085 struct partial_symtab *subpst =
2086 allocate_psymtab (include_list[i], objfile);
2088 subpst->section_offsets = pst->section_offsets;
2089 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2090 sizeof (struct symloc));
2091 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2092 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2093 subpst->textlow = 0;
2094 subpst->texthigh = 0;
2096 /* We could save slight bits of space by only making one of these,
2097 shared by the entire set of include files. FIXME-someday. */
2098 subpst->dependencies = (struct partial_symtab **)
2099 obstack_alloc (&objfile->objfile_obstack,
2100 sizeof (struct partial_symtab *));
2101 subpst->dependencies[0] = pst;
2102 subpst->number_of_dependencies = 1;
2104 subpst->globals_offset =
2105 subpst->n_global_syms =
2106 subpst->statics_offset =
2107 subpst->n_static_syms = 0;
2111 subpst->read_symtab = pst->read_symtab;
2114 sort_pst_symbols (objfile, pst);
2116 if (num_includes == 0
2117 && number_dependencies == 0
2118 && pst->n_global_syms == 0
2119 && pst->n_static_syms == 0)
2121 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2122 it is on the obstack, but we can forget to chain it on the list. */
2123 /* Empty psymtabs happen as a result of header files which don't have
2124 any symbols in them. There can be a lot of them. */
2126 discard_psymtab (objfile, pst);
2128 /* Indicate that psymtab was thrown away. */
2129 pst = (struct partial_symtab *) NULL;
2134 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2135 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2136 the symbol and its auxents. */
2139 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2140 const char **name, char **raw, unsigned int *symnump,
2141 struct objfile *objfile)
2143 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2144 if (symbol->n_zeroes)
2146 /* If it's exactly E_SYMNMLEN characters long it isn't
2148 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2150 /* FIXME: wastes memory for symbols which we don't end up putting
2151 into the minimal symbols. */
2154 p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1);
2155 strncpy (p, symbol->n_name, E_SYMNMLEN);
2156 p[E_SYMNMLEN] = '\0';
2160 /* Point to the unswapped name as that persists as long as the
2162 *name = ((struct external_syment *) *raw)->e.e_name;
2164 else if (symbol->n_sclass & 0x80)
2166 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2170 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2173 *raw += coff_data (objfile->obfd)->local_symesz;
2174 if (symbol->n_numaux > 0)
2176 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2177 symbol->n_sclass, 0, symbol->n_numaux, aux);
2179 *symnump += symbol->n_numaux;
2180 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2185 function_outside_compilation_unit_complaint (const char *arg1)
2187 complaint (&symfile_complaints,
2188 _("function `%s' appears to be defined "
2189 "outside of all compilation units"),
2194 scan_xcoff_symtab (struct objfile *objfile)
2196 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2197 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2198 const char *filestring = NULL;
2200 const char *namestring;
2201 int past_first_source_file = 0;
2206 /* Current partial symtab */
2207 struct partial_symtab *pst;
2209 /* List of current psymtab's include files. */
2210 const char **psymtab_include_list;
2211 int includes_allocated;
2214 /* Index within current psymtab dependency list. */
2215 struct partial_symtab **dependency_list;
2216 int dependencies_used, dependencies_allocated;
2219 struct internal_syment symbol;
2220 union internal_auxent main_aux[5];
2221 unsigned int ssymnum;
2223 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2224 CORE_ADDR last_csect_val = 0;
2225 int last_csect_sec = 0;
2226 int misc_func_recorded = 0; /* true if any misc. function. */
2227 int textlow_not_set = 1;
2229 pst = (struct partial_symtab *) 0;
2231 includes_allocated = 30;
2233 psymtab_include_list = (const char **) alloca (includes_allocated *
2234 sizeof (const char *));
2236 dependencies_allocated = 30;
2237 dependencies_used = 0;
2239 (struct partial_symtab **) alloca (dependencies_allocated *
2240 sizeof (struct partial_symtab *));
2242 set_last_source_file (NULL);
2244 abfd = objfile->obfd;
2245 next_symbol_text_func = xcoff_next_symbol_text;
2247 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2248 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2250 while (ssymnum < nsyms)
2256 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2257 sclass = symbol.n_sclass;
2264 /* The CSECT auxent--always the last auxent. */
2265 union internal_auxent csect_aux;
2266 unsigned int symnum_before = ssymnum;
2268 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2270 if (symbol.n_numaux > 1)
2272 bfd_coff_swap_aux_in
2274 sraw_symbol - coff_data (abfd)->local_symesz,
2277 symbol.n_numaux - 1,
2282 csect_aux = main_aux[0];
2284 /* If symbol name starts with ".$" or "$", ignore it. */
2285 if (namestring[0] == '$'
2286 || (namestring[0] == '.' && namestring[1] == '$'))
2289 switch (csect_aux.x_csect.x_smtyp & 0x7)
2292 switch (csect_aux.x_csect.x_smclas)
2295 if (last_csect_name)
2297 /* If no misc. function recorded in the last
2298 seen csect, enter it as a function. This
2299 will take care of functions like strcmp()
2302 if (!misc_func_recorded)
2304 record_minimal_symbol
2305 (last_csect_name, last_csect_val,
2306 mst_text, last_csect_sec, objfile);
2307 misc_func_recorded = 1;
2312 /* We have to allocate one psymtab for
2313 each program csect, because their text
2314 sections need not be adjacent. */
2316 (objfile, pst, psymtab_include_list,
2317 includes_used, symnum_before, dependency_list,
2318 dependencies_used, textlow_not_set);
2320 dependencies_used = 0;
2321 /* Give all psymtabs for this source file the same
2323 pst = xcoff_start_psymtab
2327 objfile->global_psymbols.next,
2328 objfile->static_psymbols.next);
2331 /* Activate the misc_func_recorded mechanism for
2332 compiler- and linker-generated CSECTs like ".strcmp"
2334 if (namestring && (namestring[0] == '.'
2335 || namestring[0] == '@'))
2337 last_csect_name = namestring;
2338 last_csect_val = symbol.n_value;
2339 last_csect_sec = symbol.n_scnum;
2344 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2346 if (highval > pst->texthigh)
2347 pst->texthigh = highval;
2348 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2349 pst->textlow = symbol.n_value;
2351 misc_func_recorded = 0;
2356 /* Data variables are recorded in the minimal symbol
2357 table, except for section symbols. */
2358 if (*namestring != '.')
2359 record_minimal_symbol
2360 (namestring, symbol.n_value,
2361 sclass == C_HIDEXT ? mst_file_data : mst_data,
2362 symbol.n_scnum, objfile);
2367 warning (_("More than one XMC_TC0 symbol found."));
2368 toc_offset = symbol.n_value;
2370 /* Make TOC offset relative to start address of
2372 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2374 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2378 /* These symbols tell us where the TOC entry for a
2379 variable is, not the variable itself. */
2388 switch (csect_aux.x_csect.x_smclas)
2391 /* A function entry point. */
2393 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2394 first_fun_line_offset =
2395 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2397 record_minimal_symbol
2398 (namestring, symbol.n_value,
2399 sclass == C_HIDEXT ? mst_file_text : mst_text,
2400 symbol.n_scnum, objfile);
2401 misc_func_recorded = 1;
2406 /* shared library function trampoline code entry
2409 /* record trampoline code entries as
2410 mst_solib_trampoline symbol. When we lookup mst
2411 symbols, we will choose mst_text over
2412 mst_solib_trampoline. */
2413 record_minimal_symbol
2414 (namestring, symbol.n_value,
2415 mst_solib_trampoline, symbol.n_scnum, objfile);
2416 misc_func_recorded = 1;
2420 /* The symbols often have the same names as
2421 debug symbols for functions, and confuse
2427 /* xlc puts each variable in a separate csect,
2428 so we get an XTY_SD for each variable. But
2429 gcc puts several variables in a csect, so
2430 that each variable only gets an XTY_LD. We
2431 still need to record them. This will
2432 typically be XMC_RW; I suspect XMC_RO and
2433 XMC_BS might be possible too. */
2434 if (*namestring != '.')
2435 record_minimal_symbol
2436 (namestring, symbol.n_value,
2437 sclass == C_HIDEXT ? mst_file_data : mst_data,
2438 symbol.n_scnum, objfile);
2444 switch (csect_aux.x_csect.x_smclas)
2448 /* Common variables are recorded in the minimal symbol
2449 table, except for section symbols. */
2450 if (*namestring != '.')
2451 record_minimal_symbol
2452 (namestring, symbol.n_value,
2453 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2454 symbol.n_scnum, objfile);
2466 unsigned int symnum_before;
2468 symnum_before = ssymnum;
2469 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2472 /* See if the last csect needs to be recorded. */
2474 if (last_csect_name && !misc_func_recorded)
2476 /* If no misc. function recorded in the last seen csect, enter
2477 it as a function. This will take care of functions like
2478 strcmp() compiled by xlc. */
2480 record_minimal_symbol (last_csect_name, last_csect_val,
2481 mst_text, last_csect_sec, objfile);
2482 misc_func_recorded = 1;
2487 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2488 includes_used, symnum_before,
2489 dependency_list, dependencies_used,
2492 dependencies_used = 0;
2494 first_fun_line_offset = 0;
2496 /* XCOFF, according to the AIX 3.2 documentation, puts the
2497 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2498 do things the standard COFF way and put it in the auxent.
2499 We use the auxent if the symbol is ".file" and an auxent
2500 exists, otherwise use the symbol itself. */
2501 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2503 filestring = coff_getfilename (&main_aux[0], objfile);
2506 filestring = namestring;
2508 pst = xcoff_start_psymtab (objfile,
2511 objfile->global_psymbols.next,
2512 objfile->static_psymbols.next);
2513 last_csect_name = NULL;
2519 complaint (&symfile_complaints,
2520 _("Storage class %d not recognized during scan"),
2525 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2526 to handle only the C_FUN and C_EXT. */
2541 /* C_EINCL means we are switching back to the main file. But there
2542 is no reason to care; the only thing we want to know about
2543 includes is the names of all the included (.h) files. */
2548 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2552 /* I don't think the name of the common block (as opposed to the
2553 variables within it) is something which is user visible
2561 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2562 so C_LSYM would appear to be only for locals. */
2568 /* We probably could save a few instructions by assuming that
2569 C_LSYM, C_PSYM, etc., never have auxents. */
2570 int naux1 = symbol.n_numaux + 1;
2573 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2579 /* Mark down an include file in the current psymtab. */
2580 enum language tmp_language;
2582 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2585 tmp_language = deduce_language_from_filename (namestring);
2587 /* Only change the psymtab's language if we've learned
2588 something useful (eg. tmp_language is not language_unknown).
2589 In addition, to match what start_subfile does, never change
2591 if (tmp_language != language_unknown
2592 && (tmp_language != language_c
2593 || psymtab_language != language_cplus))
2594 psymtab_language = tmp_language;
2596 /* In C++, one may expect the same filename to come round many
2597 times, when code is coming alternately from the main file
2598 and from inline functions in other files. So I check to see
2599 if this is a file we've seen before -- either the main
2600 source file, or a previously included file.
2602 This seems to be a lot of time to be spending on N_SOL, but
2603 things like "break c-exp.y:435" need to work (I
2604 suppose the psymtab_include_list could be hashed or put
2605 in a binary tree, if profiling shows this is a major hog). */
2606 if (pst && strcmp (namestring, pst->filename) == 0)
2612 for (i = 0; i < includes_used; i++)
2613 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2621 psymtab_include_list[includes_used++] = namestring;
2622 if (includes_used >= includes_allocated)
2624 const char **orig = psymtab_include_list;
2626 psymtab_include_list = (const char **)
2627 alloca ((includes_allocated *= 2) *
2628 sizeof (const char *));
2629 memcpy (psymtab_include_list, orig,
2630 includes_used * sizeof (const char *));
2635 /* The value of the C_FUN is not the address of the function (it
2636 appears to be the address before linking), but as long as it
2637 is smaller than the actual address, then find_pc_partial_function
2638 will use the minimal symbols instead. I hope. */
2647 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2650 p = strchr (namestring, ':');
2652 continue; /* Not a debugging symbol. */
2654 /* Main processing section for debugging symbols which
2655 the initial read through the symbol tables needs to worry
2656 about. If we reach this point, the symbol which we are
2657 considering is definitely one we are interested in.
2658 p must also contain the (valid) index into the namestring
2659 which indicates the debugging type symbol. */
2664 symbol.n_value += ANOFFSET (objfile->section_offsets,
2665 SECT_OFF_DATA (objfile));
2667 if (gdbarch_static_transform_name_p (gdbarch))
2668 namestring = gdbarch_static_transform_name
2669 (gdbarch, namestring);
2671 add_psymbol_to_list (namestring, p - namestring, 1,
2672 VAR_DOMAIN, LOC_STATIC,
2673 &objfile->static_psymbols,
2675 psymtab_language, objfile);
2679 symbol.n_value += ANOFFSET (objfile->section_offsets,
2680 SECT_OFF_DATA (objfile));
2681 /* The addresses in these entries are reported to be
2682 wrong. See the code that reads 'G's for symtabs. */
2683 add_psymbol_to_list (namestring, p - namestring, 1,
2684 VAR_DOMAIN, LOC_STATIC,
2685 &objfile->global_psymbols,
2687 psymtab_language, objfile);
2691 /* When a 'T' entry is defining an anonymous enum, it
2692 may have a name which is the empty string, or a
2693 single space. Since they're not really defining a
2694 symbol, those shouldn't go in the partial symbol
2695 table. We do pick up the elements of such enums at
2696 'check_enum:', below. */
2697 if (p >= namestring + 2
2698 || (p == namestring + 1
2699 && namestring[0] != ' '))
2701 add_psymbol_to_list (namestring, p - namestring, 1,
2702 STRUCT_DOMAIN, LOC_TYPEDEF,
2703 &objfile->static_psymbols,
2705 psymtab_language, objfile);
2708 /* Also a typedef with the same name. */
2709 add_psymbol_to_list (namestring, p - namestring, 1,
2710 VAR_DOMAIN, LOC_TYPEDEF,
2711 &objfile->static_psymbols,
2713 psymtab_language, objfile);
2720 if (p != namestring) /* a name is there, not just :T... */
2722 add_psymbol_to_list (namestring, p - namestring, 1,
2723 VAR_DOMAIN, LOC_TYPEDEF,
2724 &objfile->static_psymbols,
2726 psymtab_language, objfile);
2729 /* If this is an enumerated type, we need to
2730 add all the enum constants to the partial symbol
2731 table. This does not cover enums without names, e.g.
2732 "enum {a, b} c;" in C, but fortunately those are
2733 rare. There is no way for GDB to find those from the
2734 enum type without spending too much time on it. Thus
2735 to solve this problem, the compiler needs to put out the
2736 enum in a nameless type. GCC2 does this. */
2738 /* We are looking for something of the form
2739 <name> ":" ("t" | "T") [<number> "="] "e"
2740 {<constant> ":" <value> ","} ";". */
2742 /* Skip over the colon and the 't' or 'T'. */
2744 /* This type may be given a number. Also, numbers can come
2745 in pairs like (0,26). Skip over it. */
2746 while ((*p >= '0' && *p <= '9')
2747 || *p == '(' || *p == ',' || *p == ')'
2753 /* The aix4 compiler emits extra crud before the
2757 /* Skip over the type (?). */
2761 /* Skip over the colon. */
2765 /* We have found an enumerated type. */
2766 /* According to comments in read_enum_type
2767 a comma could end it instead of a semicolon.
2768 I don't know where that happens.
2770 while (*p && *p != ';' && *p != ',')
2774 /* Check for and handle cretinous dbx symbol name
2776 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2777 p = next_symbol_text (objfile);
2779 /* Point to the character after the name
2780 of the enum constant. */
2781 for (q = p; *q && *q != ':'; q++)
2783 /* Note that the value doesn't matter for
2784 enum constants in psymtabs, just in symtabs. */
2785 add_psymbol_to_list (p, q - p, 1,
2786 VAR_DOMAIN, LOC_CONST,
2787 &objfile->static_psymbols, 0,
2788 0, psymtab_language, objfile);
2789 /* Point past the name. */
2791 /* Skip over the value. */
2792 while (*p && *p != ',')
2794 /* Advance past the comma. */
2802 /* Constant, e.g. from "const" in Pascal. */
2803 add_psymbol_to_list (namestring, p - namestring, 1,
2804 VAR_DOMAIN, LOC_CONST,
2805 &objfile->static_psymbols, symbol.n_value,
2806 0, psymtab_language, objfile);
2812 int name_len = p - namestring;
2813 char *name = xmalloc (name_len + 1);
2815 memcpy (name, namestring, name_len);
2816 name[name_len] = '\0';
2817 function_outside_compilation_unit_complaint (name);
2820 symbol.n_value += ANOFFSET (objfile->section_offsets,
2821 SECT_OFF_TEXT (objfile));
2822 add_psymbol_to_list (namestring, p - namestring, 1,
2823 VAR_DOMAIN, LOC_BLOCK,
2824 &objfile->static_psymbols,
2826 psymtab_language, objfile);
2829 /* Global functions were ignored here, but now they
2830 are put into the global psymtab like one would expect.
2831 They're also in the minimal symbol table. */
2835 int name_len = p - namestring;
2836 char *name = xmalloc (name_len + 1);
2838 memcpy (name, namestring, name_len);
2839 name[name_len] = '\0';
2840 function_outside_compilation_unit_complaint (name);
2844 /* We need only the minimal symbols for these
2845 loader-generated definitions. Keeping the global
2846 symbols leads to "in psymbols but not in symbols"
2848 if (strncmp (namestring, "@FIX", 4) == 0)
2851 symbol.n_value += ANOFFSET (objfile->section_offsets,
2852 SECT_OFF_TEXT (objfile));
2853 add_psymbol_to_list (namestring, p - namestring, 1,
2854 VAR_DOMAIN, LOC_BLOCK,
2855 &objfile->global_psymbols,
2857 psymtab_language, objfile);
2860 /* Two things show up here (hopefully); static symbols of
2861 local scope (static used inside braces) or extensions
2862 of structure symbols. We can ignore both. */
2876 case '#': /* For symbol identification (used in
2881 /* It is a C++ nested symbol. We don't need to record it
2882 (I don't think); if we try to look up foo::bar::baz,
2883 then symbols for the symtab containing foo should get
2884 read in, I think. */
2885 /* Someone says sun cc puts out symbols like
2886 /foo/baz/maclib::/usr/local/bin/maclib,
2887 which would get here with a symbol type of ':'. */
2891 /* Unexpected symbol descriptor. The second and
2892 subsequent stabs of a continued stab can show up
2893 here. The question is whether they ever can mimic
2894 a normal stab--it would be nice if not, since we
2895 certainly don't want to spend the time searching to
2896 the end of every string looking for a
2899 complaint (&symfile_complaints,
2900 _("unknown symbol descriptor `%c'"), p[1]);
2902 /* Ignore it; perhaps it is an extension that we don't
2912 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2913 ssymnum, dependency_list,
2914 dependencies_used, textlow_not_set);
2917 /* Record the toc offset value of this symbol table into objfile
2918 structure. If no XMC_TC0 is found, toc_offset should be zero.
2919 Another place to obtain this information would be file auxiliary
2922 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2925 /* Return the toc offset value for a given objfile. */
2928 xcoff_get_toc_offset (struct objfile *objfile)
2931 return XCOFF_DATA (objfile)->toc_offset;
2935 /* Scan and build partial symbols for a symbol file.
2936 We have been initialized by a call to dbx_symfile_init, which
2937 put all the relevant info into a "struct dbx_symfile_info",
2938 hung off the objfile structure.
2940 SECTION_OFFSETS contains offsets relative to which the symbols in the
2941 various sections are (depending where the sections were actually
2945 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2949 struct cleanup *back_to;
2950 int num_symbols; /* # of symbols */
2951 file_ptr symtab_offset; /* symbol table and */
2952 file_ptr stringtab_offset; /* string table file offsets */
2953 struct coff_symfile_info *info;
2957 info = XCOFF_DATA (objfile);
2958 symfile_bfd = abfd = objfile->obfd;
2959 name = objfile_name (objfile);
2961 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2962 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2963 stringtab_offset = symtab_offset +
2964 num_symbols * coff_data (abfd)->local_symesz;
2966 info->min_lineno_offset = 0;
2967 info->max_lineno_offset = 0;
2968 bfd_map_over_sections (abfd, find_linenos, info);
2970 if (num_symbols > 0)
2972 /* Read the string table. */
2973 init_stringtab (abfd, stringtab_offset, objfile);
2975 /* Read the .debug section, if present. */
2977 struct bfd_section *secp;
2978 bfd_size_type length;
2979 bfd_byte *debugsec = NULL;
2981 secp = bfd_get_section_by_name (abfd, ".debug");
2984 length = bfd_section_size (abfd, secp);
2987 debugsec = obstack_alloc (&objfile->objfile_obstack, length);
2989 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2991 error (_("Error reading .debug section of `%s': %s"),
2992 name, bfd_errmsg (bfd_get_error ()));
2996 info->debugsec = (char *) debugsec;
3000 /* Read the symbols. We keep them in core because we will want to
3001 access them randomly in read_symbol*. */
3002 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
3004 error (_("Error reading symbols from %s: %s"),
3005 name, bfd_errmsg (bfd_get_error ()));
3006 size = coff_data (abfd)->local_symesz * num_symbols;
3007 info->symtbl = obstack_alloc (&objfile->objfile_obstack, size);
3008 info->symtbl_num_syms = num_symbols;
3010 val = bfd_bread (info->symtbl, size, abfd);
3012 perror_with_name (_("reading symbol table"));
3014 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3015 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3016 /* I'm not sure how how good num_symbols is; the rule of thumb in
3017 init_psymbol_list was developed for a.out. On the one hand,
3018 num_symbols includes auxents. On the other hand, it doesn't
3020 init_psymbol_list (objfile, num_symbols);
3022 free_pending_blocks ();
3023 back_to = make_cleanup (really_free_pendings, 0);
3025 init_minimal_symbol_collection ();
3026 make_cleanup_discard_minimal_symbols ();
3028 /* Now that the symbol table data of the executable file are all in core,
3029 process them and define symbols accordingly. */
3031 scan_xcoff_symtab (objfile);
3033 /* Install any minimal symbols that have been collected as the current
3034 minimal symbols for this objfile. */
3036 install_minimal_symbols (objfile);
3038 /* DWARF2 sections. */
3040 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3041 dwarf2_build_psymtabs (objfile);
3043 dwarf2_build_frame_info (objfile);
3045 do_cleanups (back_to);
3049 xcoff_symfile_offsets (struct objfile *objfile,
3050 const struct section_addr_info *addrs)
3052 const char *first_section_name;
3054 default_symfile_offsets (objfile, addrs);
3056 /* Oneof the weird side-effects of default_symfile_offsets is that
3057 it sometimes sets some section indices to zero for sections that,
3058 in fact do not exist. See the body of default_symfile_offsets
3059 for more info on when that happens. Undo that, as this then allows
3060 us to test whether the associated section exists or not, and then
3061 access it quickly (without searching it again). */
3063 if (objfile->num_sections == 0)
3064 return; /* Is that even possible? Better safe than sorry. */
3067 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3069 if (objfile->sect_index_text == 0
3070 && strcmp (first_section_name, ".text") != 0)
3071 objfile->sect_index_text = -1;
3073 if (objfile->sect_index_data == 0
3074 && strcmp (first_section_name, ".data") != 0)
3075 objfile->sect_index_data = -1;
3077 if (objfile->sect_index_bss == 0
3078 && strcmp (first_section_name, ".bss") != 0)
3079 objfile->sect_index_bss = -1;
3081 if (objfile->sect_index_rodata == 0
3082 && strcmp (first_section_name, ".rodata") != 0)
3083 objfile->sect_index_rodata = -1;
3086 /* Register our ability to parse symbols for xcoff BFD files. */
3088 static const struct sym_fns xcoff_sym_fns =
3091 /* It is possible that coff and xcoff should be merged as
3092 they do have fundamental similarities (for example, the extra storage
3093 classes used for stabs could presumably be recognized in any COFF file).
3094 However, in addition to obvious things like all the csect hair, there are
3095 some subtler differences between xcoffread.c and coffread.c, notably
3096 the fact that coffread.c has no need to read in all the symbols, but
3097 xcoffread.c reads all the symbols and does in fact randomly access them
3098 (in C_BSTAT and line number processing). */
3100 xcoff_new_init, /* init anything gbl to entire symtab */
3101 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3102 xcoff_initial_scan, /* read a symbol file into symtab */
3103 NULL, /* sym_read_psymbols */
3104 xcoff_symfile_finish, /* finished with file, cleanup */
3105 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3106 default_symfile_segments, /* Get segment information from a file. */
3107 aix_process_linenos,
3108 default_symfile_relocate, /* Relocate a debug section. */
3109 NULL, /* sym_probe_fns */
3113 /* Same as xcoff_get_n_import_files, but for core files. */
3116 xcoff_get_core_n_import_files (bfd *abfd)
3118 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3120 file_ptr offset = 0;
3124 return -1; /* Not a core file. */
3126 for (offset = 0; offset < bfd_get_section_size (sect);)
3132 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3134 next = bfd_get_32 (abfd, buf);
3136 break; /* This is the last entry. */
3140 /* Return the number of entries, excluding the first one, which is
3141 the path to the executable that produced this core file. */
3142 return n_entries - 1;
3145 /* Return the number of import files (shared libraries) that the given
3146 BFD depends on. Return -1 if this number could not be computed. */
3149 xcoff_get_n_import_files (bfd *abfd)
3151 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3155 /* If the ".loader" section does not exist, the objfile is probably
3156 not an executable. Might be a core file... */
3158 return xcoff_get_core_n_import_files (abfd);
3160 /* The number of entries in the Import Files Table is stored in
3161 field l_nimpid. This field is always at offset 16, and is
3162 always 4 bytes long. Read those 4 bytes. */
3164 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3166 l_nimpid = bfd_get_32 (abfd, buf);
3168 /* By convention, the first entry is the default LIBPATH value
3169 to be used by the system loader, so it does not count towards
3170 the number of import files. */
3171 return l_nimpid - 1;
3174 /* Free the per-objfile xcoff data. */
3177 xcoff_free_info (struct objfile *objfile, void *arg)
3182 /* Provide a prototype to silence -Wmissing-prototypes. */
3183 extern initialize_file_ftype _initialize_xcoffread;
3186 _initialize_xcoffread (void)
3188 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3190 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,