1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2016 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data *xcoff_objfile_data_key;
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this
80 unsigned int lineno_off;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language = language_unknown;
88 /* Simplified internal version of coff symbol table information. */
93 int c_symnum; /* Symbol number of this entry. */
94 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
96 unsigned char c_sclass;
101 /* Last function's saved coff symbol `cs'. */
103 static struct coff_symbol fcn_cs_saved;
105 static bfd *symfile_bfd;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end;
118 /* Initial symbol-table-debug-string vector length. */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
123 there is any reason not to just use a #define, but might as well
124 ask BFD for the size and store it here, I guess. */
126 static unsigned local_symesz;
128 struct coff_symfile_info
130 file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
131 file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
133 /* Pointer to the string table. */
136 /* Pointer to debug section. */
139 /* Pointer to the a.out symbol table. */
142 /* Number of symbols in symtbl. */
145 /* Offset in data section to TOC anchor. */
146 CORE_ADDR toc_offset;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 ((struct coff_symfile_info *) objfile_data ((objfile), \
153 xcoff_objfile_data_key))
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
159 { ".dwabrev", NULL },
162 /* AIX XCOFF defines one, named DWARF section for macro debug information.
163 XLC does not generate debug_macinfo for DWARF4 and below.
164 The section is assigned to debug_macro for DWARF5 and above. */
168 { ".dwrnges", NULL },
169 { ".dwpbtyp", NULL },
170 { NULL, NULL }, /* debug_addr */
171 { ".dwframe", NULL },
172 { NULL, NULL }, /* eh_frame */
173 { NULL, NULL }, /* gdb_index */
178 bf_notfound_complaint (void)
180 complaint (&symfile_complaints,
181 _("line numbers off, `.bf' symbol not found"));
185 ef_complaint (int arg1)
187 complaint (&symfile_complaints,
188 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
192 eb_complaint (int arg1)
194 complaint (&symfile_complaints,
195 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
198 static void xcoff_initial_scan (struct objfile *, int);
200 static void scan_xcoff_symtab (struct objfile *);
202 static char *xcoff_next_symbol_text (struct objfile *);
204 static void record_include_begin (struct coff_symbol *);
207 enter_line_range (struct subfile *, unsigned, unsigned,
208 CORE_ADDR, CORE_ADDR, unsigned *);
210 static void init_stringtab (bfd *, file_ptr, struct objfile *);
212 static void xcoff_symfile_init (struct objfile *);
214 static void xcoff_new_init (struct objfile *);
216 static void xcoff_symfile_finish (struct objfile *);
218 static char *coff_getfilename (union internal_auxent *, struct objfile *);
220 static void read_symbol (struct internal_syment *, int);
222 static int read_symbol_lineno (int);
224 static CORE_ADDR read_symbol_nvalue (int);
226 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
229 static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
232 static void add_stab_to_list (char *, struct pending_stabs **);
235 static int compare_lte (const void *, const void *);
237 static struct linetable *arrange_linetable (struct linetable *);
239 static void record_include_end (struct coff_symbol *);
241 static void process_linenos (CORE_ADDR, CORE_ADDR);
244 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
246 static int secnum_to_section (int, struct objfile *);
247 static asection *secnum_to_bfd_section (int, struct objfile *);
249 struct find_targ_sec_arg
254 struct objfile *objfile;
257 static void find_targ_sec (bfd *, asection *, void *);
260 find_targ_sec (bfd *abfd, asection *sect, void *obj)
262 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
263 struct objfile *objfile = args->objfile;
265 if (sect->target_index == args->targ_index)
267 /* This is the section. Figure out what SECT_OFF_* code it is. */
268 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
269 *args->resultp = SECT_OFF_TEXT (objfile);
270 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
271 *args->resultp = SECT_OFF_DATA (objfile);
273 *args->resultp = gdb_bfd_section_index (abfd, sect);
274 *args->bfd_sect = sect;
278 /* Search all BFD sections for the section whose target_index is
279 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
280 associated index in the objfile's section_offset table is also
283 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
284 is set to the text section's number. */
287 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
288 asection **bfd_sect, int *secnum)
290 struct find_targ_sec_arg args;
292 args.targ_index = n_scnum;
293 args.resultp = secnum;
294 args.bfd_sect = bfd_sect;
295 args.objfile = objfile;
298 *secnum = SECT_OFF_TEXT (objfile);
300 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
303 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
306 secnum_to_section (int n_scnum, struct objfile *objfile)
311 xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
315 /* Return the BFD section that N_SCNUM points to. */
318 secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
323 xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
327 /* add a given stab string into given stab vector. */
332 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
334 if (*stabvector == NULL)
336 *stabvector = (struct pending_stabs *)
337 xmalloc (sizeof (struct pending_stabs) +
338 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
339 (*stabvector)->count = 0;
340 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
342 else if ((*stabvector)->count >= (*stabvector)->length)
344 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
345 *stabvector = (struct pending_stabs *)
346 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
347 (*stabvector)->length * sizeof (char *));
349 (*stabvector)->stab[(*stabvector)->count++] = stabname;
354 /* Linenos are processed on a file-by-file basis.
358 1) xlc (IBM's native c compiler) postpones static function code
359 emission to the end of a compilation unit. This way it can
360 determine if those functions (statics) are needed or not, and
361 can do some garbage collection (I think). This makes line
362 numbers and corresponding addresses unordered, and we end up
363 with a line table like:
380 and that breaks gdb's binary search on line numbers, if the
381 above table is not sorted on line numbers. And that sort
382 should be on function based, since gcc can emit line numbers
385 10 0x100 - for the init/test part of a for stmt.
388 10 0x400 - for the increment part of a for stmt.
390 arrange_linetable() will do this sorting.
392 2) aix symbol table might look like:
394 c_file // beginning of a new file
395 .bi // beginning of include file
396 .ei // end of include file
400 basically, .bi/.ei pairs do not necessarily encapsulate
401 their scope. They need to be recorded, and processed later
402 on when we come the end of the compilation unit.
403 Include table (inclTable) and process_linenos() handle
409 /* compare line table entry addresses. */
412 compare_lte (const void *lte1p, const void *lte2p)
414 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
415 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
417 return lte1->pc - lte2->pc;
420 /* Given a line table with function entries are marked, arrange its
421 functions in ascending order and strip off function entry markers
422 and return it in a newly created table. If the old one is good
423 enough, return the old one. */
424 /* FIXME: I think all this stuff can be replaced by just passing
425 sort_linevec = 1 to end_symtab. */
427 static struct linetable *
428 arrange_linetable (struct linetable *oldLineTb)
430 int ii, jj, newline, /* new line count */
431 function_count; /* # of functions */
433 struct linetable_entry *fentry; /* function entry vector */
434 int fentry_size; /* # of function entries */
435 struct linetable *newLineTb; /* new line table */
438 #define NUM_OF_FUNCTIONS 20
440 fentry_size = NUM_OF_FUNCTIONS;
441 fentry = XNEWVEC (struct linetable_entry, fentry_size);
443 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
445 if (oldLineTb->item[ii].line == 0)
446 { /* Function entry found. */
447 if (function_count >= fentry_size)
448 { /* Make sure you have room. */
450 fentry = (struct linetable_entry *)
452 fentry_size * sizeof (struct linetable_entry));
454 fentry[function_count].line = ii;
455 fentry[function_count].pc = oldLineTb->item[ii].pc;
458 /* If the function was compiled with XLC, we may have to add an
459 extra line entry later. Reserve space for that. */
460 if (ii + 1 < oldLineTb->nitems
461 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
466 if (function_count == 0)
471 else if (function_count > 1)
472 qsort (fentry, function_count,
473 sizeof (struct linetable_entry), compare_lte);
475 /* Allocate a new line table. */
476 newLineTb = (struct linetable *)
478 (sizeof (struct linetable) +
479 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
481 /* If line table does not start with a function beginning, copy up until
485 if (oldLineTb->item[0].line != 0)
487 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
488 newLineTb->item[newline] = oldLineTb->item[newline];
490 /* Now copy function lines one by one. */
492 for (ii = 0; ii < function_count; ++ii)
494 /* If the function was compiled with XLC, we may have to add an
495 extra line to cover the function prologue. */
496 jj = fentry[ii].line;
497 if (jj + 1 < oldLineTb->nitems
498 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
500 newLineTb->item[newline] = oldLineTb->item[jj];
501 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
505 for (jj = fentry[ii].line + 1;
506 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
508 newLineTb->item[newline] = oldLineTb->item[jj];
511 /* The number of items in the line table must include these
512 extra lines which were added in case of XLC compiled functions. */
513 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
517 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
518 following `IncludeChain'. At the end of each symtab (end_symtab),
519 we will determine if we should create additional symtab's to
520 represent if (the include files. */
523 typedef struct _inclTable
525 char *name; /* include filename */
527 /* Offsets to the line table. end points to the last entry which is
528 part of this include file. */
531 struct subfile *subfile;
532 unsigned funStartLine; /* Start line # of its function. */
536 #define INITIAL_INCLUDE_TABLE_LENGTH 20
537 static InclTable *inclTable; /* global include table */
538 static int inclIndx; /* last entry to table */
539 static int inclLength; /* table length */
540 static int inclDepth; /* nested include depth */
542 static void allocate_include_entry (void);
545 record_include_begin (struct coff_symbol *cs)
549 /* In xcoff, we assume include files cannot be nested (not in .c files
550 of course, but in corresponding .s files.). */
552 /* This can happen with old versions of GCC.
553 GCC 2.3.3-930426 does not exhibit this on a test case which
554 a user said produced the message for him. */
555 complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
559 allocate_include_entry ();
561 inclTable[inclIndx].name = cs->c_name;
562 inclTable[inclIndx].begin = cs->c_value;
566 record_include_end (struct coff_symbol *cs)
572 complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
575 allocate_include_entry ();
577 pTbl = &inclTable[inclIndx];
578 pTbl->end = cs->c_value;
585 allocate_include_entry (void)
587 if (inclTable == NULL)
589 inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
590 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
593 else if (inclIndx >= inclLength)
595 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
596 inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
597 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
598 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
602 /* Global variable to pass the psymtab down to all the routines involved
603 in psymtab to symtab processing. */
604 static struct partial_symtab *this_symtab_psymtab;
606 /* Objfile related to this_symtab_psymtab; set at the same time. */
607 static struct objfile *this_symtab_objfile;
609 /* given the start and end addresses of a compilation unit (or a csect,
610 at times) process its lines and create appropriate line vectors. */
613 process_linenos (CORE_ADDR start, CORE_ADDR end)
617 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
619 /* subfile structure for the main compilation unit. */
620 struct subfile main_subfile;
622 /* In the main source file, any time we see a function entry, we
623 reset this variable to function's absolute starting line number.
624 All the following line numbers in the function are relative to
625 this, and we record absolute line numbers in record_line(). */
627 unsigned int main_source_baseline = 0;
632 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
634 goto return_after_cleanup;
636 memset (&main_subfile, '\0', sizeof (main_subfile));
639 /* All source lines were in the main source file. None in include
642 enter_line_range (&main_subfile, offset, 0, start, end,
643 &main_source_baseline);
647 /* There was source with line numbers in include files. */
650 coff_data (this_symtab_objfile->obfd)->local_linesz;
651 main_source_baseline = 0;
653 for (ii = 0; ii < inclIndx; ++ii)
655 struct subfile *tmpSubfile;
657 /* If there is main file source before include file, enter it. */
658 if (offset < inclTable[ii].begin)
661 (&main_subfile, offset, inclTable[ii].begin - linesz,
662 start, 0, &main_source_baseline);
665 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
667 /* The entry in the include table refers to the main source
668 file. Add the lines to the main subfile. */
670 main_source_baseline = inclTable[ii].funStartLine;
672 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
673 start, 0, &main_source_baseline);
674 inclTable[ii].subfile = &main_subfile;
678 /* Have a new subfile for the include file. */
680 tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile);
682 memset (tmpSubfile, '\0', sizeof (struct subfile));
683 firstLine = &(inclTable[ii].funStartLine);
685 /* Enter include file's lines now. */
686 enter_line_range (tmpSubfile, inclTable[ii].begin,
687 inclTable[ii].end, start, 0, firstLine);
690 if (offset <= inclTable[ii].end)
691 offset = inclTable[ii].end + linesz;
694 /* All the include files' line have been processed at this point. Now,
695 enter remaining lines of the main file, if any left. */
696 if (offset < max_offset + 1 - linesz)
698 enter_line_range (&main_subfile, offset, 0, start, end,
699 &main_source_baseline);
703 /* Process main file's line numbers. */
704 if (main_subfile.line_vector)
706 struct linetable *lineTb, *lv;
708 lv = main_subfile.line_vector;
710 /* Line numbers are not necessarily ordered. xlc compilation will
711 put static function to the end. */
713 lineTb = arrange_linetable (lv);
716 current_subfile->line_vector = (struct linetable *)
717 xrealloc (lv, (sizeof (struct linetable)
718 + lv->nitems * sizeof (struct linetable_entry)));
723 current_subfile->line_vector = lineTb;
726 current_subfile->line_vector_length =
727 current_subfile->line_vector->nitems;
730 /* Now, process included files' line numbers. */
732 for (ii = 0; ii < inclIndx; ++ii)
734 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
735 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
738 struct linetable *lineTb, *lv;
740 lv = (inclTable[ii].subfile)->line_vector;
742 /* Line numbers are not necessarily ordered. xlc compilation will
743 put static function to the end. */
745 lineTb = arrange_linetable (lv);
749 /* For the same include file, we might want to have more than one
750 subfile. This happens if we have something like:
758 while foo.h including code in it. (stupid but possible)
759 Since start_subfile() looks at the name and uses an
760 existing one if finds, we need to provide a fake name and
764 start_subfile (inclTable[ii].name);
767 /* Pick a fake name that will produce the same results as this
768 one when passed to deduce_language_from_filename. Kludge on
770 char *fakename = strrchr (inclTable[ii].name, '.');
772 if (fakename == NULL)
774 start_subfile (fakename);
775 xfree (current_subfile->name);
777 current_subfile->name = xstrdup (inclTable[ii].name);
782 current_subfile->line_vector =
783 (struct linetable *) xrealloc
784 (lv, (sizeof (struct linetable)
785 + lv->nitems * sizeof (struct linetable_entry)));
791 current_subfile->line_vector = lineTb;
794 current_subfile->line_vector_length =
795 current_subfile->line_vector->nitems;
796 start_subfile (pop_subfile ());
800 return_after_cleanup:
802 /* We don't want to keep alloc/free'ing the global include file table. */
807 aix_process_linenos (struct objfile *objfile)
809 /* There is no linenos to read if there are only dwarf info. */
810 if (this_symtab_psymtab == NULL)
813 /* Process line numbers and enter them into line vector. */
814 process_linenos (last_source_start_addr, cur_src_end_addr);
818 /* Enter a given range of lines into the line vector.
819 can be called in the following two ways:
820 enter_line_range (subfile, beginoffset, endoffset,
821 startaddr, 0, firstLine) or
822 enter_line_range (subfile, beginoffset, 0,
823 startaddr, endaddr, firstLine)
825 endoffset points to the last line table entry that we should pay
829 enter_line_range (struct subfile *subfile, unsigned beginoffset,
830 unsigned endoffset, /* offsets to line table */
831 CORE_ADDR startaddr, /* offsets to line table */
832 CORE_ADDR endaddr, unsigned *firstLine)
834 struct objfile *objfile = this_symtab_objfile;
835 struct gdbarch *gdbarch = get_objfile_arch (objfile);
836 unsigned int curoffset;
839 struct internal_lineno int_lnno;
840 unsigned int limit_offset;
844 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
846 curoffset = beginoffset;
847 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
851 if (endoffset >= limit_offset)
853 complaint (&symfile_complaints,
854 _("Bad line table offset in C_EINCL directive"));
857 limit_offset = endoffset;
862 abfd = objfile->obfd;
863 linesz = coff_data (abfd)->local_linesz;
864 ext_lnno = alloca (linesz);
866 while (curoffset <= limit_offset)
868 bfd_seek (abfd, curoffset, SEEK_SET);
869 bfd_bread (ext_lnno, linesz, abfd);
870 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
872 /* Find the address this line represents. */
873 addr = (int_lnno.l_lnno
874 ? int_lnno.l_addr.l_paddr
875 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
876 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
878 if (addr < startaddr || (endaddr && addr >= endaddr))
881 if (int_lnno.l_lnno == 0)
883 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
884 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
888 record_line (subfile, *firstLine + int_lnno.l_lnno,
889 gdbarch_addr_bits_remove (gdbarch, addr));
895 /* Save the vital information for use when closing off the current file.
896 NAME is the file name the symbols came from, START_ADDR is the first
897 text address for the file, and SIZE is the number of bytes of text. */
899 #define complete_symtab(name, start_addr) { \
900 set_last_source_file (name); \
901 last_source_start_addr = start_addr; \
905 /* Refill the symbol table input buffer
906 and set the variables that control fetching entries from it.
907 Reports an error if no data available.
908 This function can read past the end of the symbol table
909 (into the string table) but this does no harm. */
911 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
913 Creation of all new minimal symbols should go through this function
914 rather than calling the various prim_record_[...] functions in order
915 to make sure that all symbol addresses get properly relocated.
919 NAME - the symbol's name (but if NAME starts with a period, that
920 leading period is discarded).
921 ADDRESS - the symbol's address, prior to relocation. This function
922 relocates the address before recording the minimal symbol.
923 MS_TYPE - the symbol's type.
924 N_SCNUM - the symbol's XCOFF section number.
925 OBJFILE - the objfile associated with the minimal symbol. */
928 record_minimal_symbol (const char *name, CORE_ADDR address,
929 enum minimal_symbol_type ms_type,
931 struct objfile *objfile)
937 prim_record_minimal_symbol_and_info (name, address, ms_type,
938 secnum_to_section (n_scnum, objfile),
942 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
943 nested. At any given time, a symbol can only be in one static block.
944 This is the base address of current static block, zero if non exists. */
946 static int static_block_base = 0;
948 /* Section number for the current static block. */
950 static int static_block_section = -1;
952 /* true if space for symbol name has been allocated. */
954 static int symname_alloced = 0;
956 /* Next symbol to read. Pointer into raw seething symbol table. */
958 static char *raw_symbol;
960 /* This is the function which stabsread.c calls to get symbol
964 xcoff_next_symbol_text (struct objfile *objfile)
966 struct internal_syment symbol;
969 /* FIXME: is this the same as the passed arg? */
970 if (this_symtab_objfile)
971 objfile = this_symtab_objfile;
973 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
976 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
978 /* Return something which points to '\0' and hope the symbol reading
979 code does something reasonable. */
982 else if (symbol.n_sclass & 0x80)
984 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
985 raw_symbol += coff_data (objfile->obfd)->local_symesz;
990 complaint (&symfile_complaints, _("Unexpected symbol continuation"));
992 /* Return something which points to '\0' and hope the symbol reading
993 code does something reasonable. */
999 /* Read symbols for a given partial symbol table. */
1002 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1004 bfd *abfd = objfile->obfd;
1005 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1006 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1007 char *strtbl = xcoff->strtbl;
1008 char *debugsec = xcoff->debugsec;
1009 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1011 struct internal_syment symbol[1];
1012 union internal_auxent main_aux;
1013 struct coff_symbol cs[1];
1014 CORE_ADDR file_start_addr = 0;
1015 CORE_ADDR file_end_addr = 0;
1017 int next_file_symnum = -1;
1018 unsigned int max_symnum;
1019 int just_started = 1;
1021 CORE_ADDR fcn_start_addr = 0;
1023 struct coff_symbol fcn_stab_saved = { 0 };
1025 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1026 union internal_auxent fcn_aux_saved = main_aux;
1027 struct context_stack *newobj;
1029 const char *filestring = pst->filename; /* Name of the current file. */
1031 const char *last_csect_name; /* Last seen csect's name. */
1033 this_symtab_psymtab = pst;
1034 this_symtab_objfile = objfile;
1036 /* Get the appropriate COFF "constants" related to the file we're
1038 local_symesz = coff_data (abfd)->local_symesz;
1040 set_last_source_file (NULL);
1041 last_csect_name = 0;
1044 start_symtab (objfile, filestring, (char *) NULL, file_start_addr);
1045 record_debugformat (debugfmt);
1046 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1048 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1049 first_object_file_end = 0;
1051 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1053 while (symnum < max_symnum)
1055 QUIT; /* make this command interruptable. */
1057 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1058 /* read one symbol into `cs' structure. After processing the
1059 whole symbol table, only string table will be kept in memory,
1060 symbol table and debug section of xcoff will be freed. Thus
1061 we can mark symbols with names in string table as
1066 /* Swap and align the symbol into a reasonable C structure. */
1067 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1069 cs->c_symnum = symnum;
1070 cs->c_naux = symbol->n_numaux;
1071 if (symbol->n_zeroes)
1073 symname_alloced = 0;
1074 /* We must use the original, unswapped, name here so the name field
1075 pointed to by cs->c_name will persist throughout xcoffread. If
1076 we use the new field, it gets overwritten for each symbol. */
1077 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1078 /* If it's exactly E_SYMNMLEN characters long it isn't
1080 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1084 p = (char *) obstack_alloc (&objfile->objfile_obstack,
1086 strncpy (p, cs->c_name, E_SYMNMLEN);
1087 p[E_SYMNMLEN] = '\0';
1089 symname_alloced = 1;
1092 else if (symbol->n_sclass & 0x80)
1094 cs->c_name = debugsec + symbol->n_offset;
1095 symname_alloced = 0;
1099 /* in string table */
1100 cs->c_name = strtbl + (int) symbol->n_offset;
1101 symname_alloced = 1;
1103 cs->c_value = symbol->n_value;
1104 cs->c_sclass = symbol->n_sclass;
1105 cs->c_secnum = symbol->n_scnum;
1106 cs->c_type = (unsigned) symbol->n_type;
1108 raw_symbol += local_symesz;
1111 /* Save addr of first aux entry. */
1112 raw_auxptr = raw_symbol;
1114 /* Skip all the auxents associated with this symbol. */
1115 for (ii = symbol->n_numaux; ii; --ii)
1117 raw_symbol += coff_data (abfd)->local_auxesz;
1122 /* if symbol name starts with ".$" or "$", ignore it. */
1123 if (cs->c_name[0] == '$'
1124 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1127 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1129 if (get_last_source_file ())
1131 pst->compunit_symtab = end_symtab (cur_src_end_addr,
1132 SECT_OFF_TEXT (objfile));
1137 start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0);
1138 record_debugformat (debugfmt);
1139 cur_src_end_addr = first_object_file_end;
1140 /* Done with all files, everything from here on is globals. */
1143 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1146 /* Dealing with a symbol with a csect entry. */
1148 #define CSECT(PP) ((PP)->x_csect)
1149 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1150 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1151 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1152 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1154 /* Convert the auxent to something we can access. */
1155 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1156 0, cs->c_naux, &main_aux);
1158 switch (CSECT_SMTYP (&main_aux))
1162 /* Ignore all external references. */
1166 /* A section description. */
1168 switch (CSECT_SCLAS (&main_aux))
1174 /* A program csect is seen. We have to allocate one
1175 symbol table for each program csect. Normally gdb
1176 prefers one symtab for each source file. In case
1177 of AIX, one source file might include more than one
1178 [PR] csect, and they don't have to be adjacent in
1179 terms of the space they occupy in memory. Thus, one
1180 single source file might get fragmented in the
1181 memory and gdb's file start and end address
1182 approach does not work! GCC (and I think xlc) seem
1183 to put all the code in the unnamed program csect. */
1185 if (last_csect_name)
1187 complete_symtab (filestring, file_start_addr);
1188 cur_src_end_addr = file_end_addr;
1189 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1192 /* Give all csects for this source file the same
1194 start_symtab (objfile, filestring, NULL,
1196 record_debugformat (debugfmt);
1199 /* If this is the very first csect seen,
1200 basically `__start'. */
1203 first_object_file_end
1204 = cs->c_value + CSECT_LEN (&main_aux);
1209 cs->c_value + ANOFFSET (objfile->section_offsets,
1210 SECT_OFF_TEXT (objfile));
1211 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1213 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1214 last_csect_name = cs->c_name;
1218 /* All other symbols are put into the minimal symbol
1231 /* Ignore the symbol. */
1239 switch (CSECT_SCLAS (&main_aux))
1242 /* a function entry point. */
1243 function_entry_point:
1245 fcn_start_addr = cs->c_value;
1247 /* save the function header info, which will be used
1248 when `.bf' is seen. */
1250 fcn_aux_saved = main_aux;
1254 /* shared library function trampoline code entry point. */
1258 /* The symbols often have the same names as debug symbols for
1259 functions, and confuse lookup_symbol. */
1263 /* xlc puts each variable in a separate csect, so we get
1264 an XTY_SD for each variable. But gcc puts several
1265 variables in a csect, so that each variable only gets
1266 an XTY_LD. This will typically be XMC_RW; I suspect
1267 XMC_RO and XMC_BS might be possible too.
1268 These variables are put in the minimal symbol table
1275 /* Common symbols are put into the minimal symbol table only. */
1283 /* If explicitly specified as a function, treat is as one. This check
1284 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1285 after the above CSECT check. */
1286 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1288 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1289 0, cs->c_naux, &main_aux);
1290 goto function_entry_point;
1293 switch (cs->c_sclass)
1297 /* c_value field contains symnum of next .file entry in table
1298 or symnum of first global after last .file. */
1300 next_file_symnum = cs->c_value;
1302 /* Complete symbol table for last object file containing
1303 debugging information. */
1305 /* Whether or not there was a csect in the previous file, we
1306 have to call `end_stabs' and `start_stabs' to reset
1307 type_vector, line_vector, etc. structures. */
1309 complete_symtab (filestring, file_start_addr);
1310 cur_src_end_addr = file_end_addr;
1311 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1314 /* XCOFF, according to the AIX 3.2 documentation, puts the
1315 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1316 do things the standard COFF way and put it in the auxent.
1317 We use the auxent if the symbol is ".file" and an auxent
1318 exists, otherwise use the symbol itself. Simple
1320 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1322 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1323 0, cs->c_naux, &main_aux);
1324 filestring = coff_getfilename (&main_aux, objfile);
1327 filestring = cs->c_name;
1330 start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0);
1331 record_debugformat (debugfmt);
1332 last_csect_name = 0;
1334 /* reset file start and end addresses. A compilation unit
1335 with no text (only data) should have zero file
1337 file_start_addr = file_end_addr = 0;
1341 fcn_stab_saved = *cs;
1345 if (strcmp (cs->c_name, ".bf") == 0)
1347 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1348 SECT_OFF_TEXT (objfile));
1350 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1351 0, cs->c_naux, &main_aux);
1353 within_function = 1;
1355 newobj = push_context (0, fcn_start_addr + off);
1357 newobj->name = define_symbol
1358 (fcn_cs_saved.c_value + off,
1359 fcn_stab_saved.c_name, 0, 0, objfile);
1360 if (newobj->name != NULL)
1361 SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
1363 else if (strcmp (cs->c_name, ".ef") == 0)
1365 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1366 0, cs->c_naux, &main_aux);
1368 /* The value of .ef is the address of epilogue code;
1369 not useful for gdb. */
1370 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1371 contains number of lines to '}' */
1373 if (context_stack_depth <= 0)
1374 { /* We attempted to pop an empty context stack. */
1375 ef_complaint (cs->c_symnum);
1376 within_function = 0;
1379 newobj = pop_context ();
1380 /* Stack must be empty now. */
1381 if (context_stack_depth > 0 || newobj == NULL)
1383 ef_complaint (cs->c_symnum);
1384 within_function = 0;
1388 finish_block (newobj->name, &local_symbols, newobj->old_blocks,
1389 NULL, newobj->start_addr,
1390 (fcn_cs_saved.c_value
1391 + fcn_aux_saved.x_sym.x_misc.x_fsize
1392 + ANOFFSET (objfile->section_offsets,
1393 SECT_OFF_TEXT (objfile))));
1394 within_function = 0;
1399 /* Begin static block. */
1401 struct internal_syment symbol;
1403 read_symbol (&symbol, cs->c_value);
1404 static_block_base = symbol.n_value;
1405 static_block_section =
1406 secnum_to_section (symbol.n_scnum, objfile);
1411 /* End of static block. */
1412 static_block_base = 0;
1413 static_block_section = -1;
1424 complaint (&symfile_complaints,
1425 _("Unrecognized storage class %d."),
1440 /* beginning of include file */
1441 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1442 order. Thus, when wee see them, we might not know enough info
1443 to process them. Thus, we'll be saving them into a table
1444 (inclTable) and postpone their processing. */
1446 record_include_begin (cs);
1450 /* End of include file. */
1451 /* See the comment after case C_BINCL. */
1452 record_include_end (cs);
1456 if (strcmp (cs->c_name, ".bb") == 0)
1459 newobj = push_context (depth,
1461 + ANOFFSET (objfile->section_offsets,
1462 SECT_OFF_TEXT (objfile))));
1464 else if (strcmp (cs->c_name, ".eb") == 0)
1466 if (context_stack_depth <= 0)
1467 { /* We attempted to pop an empty context stack. */
1468 eb_complaint (cs->c_symnum);
1471 newobj = pop_context ();
1472 if (depth-- != newobj->depth)
1474 eb_complaint (cs->c_symnum);
1477 if (local_symbols && context_stack_depth > 0)
1479 /* Make a block for the local symbols within. */
1480 finish_block (newobj->name, &local_symbols,
1481 newobj->old_blocks, NULL,
1484 + ANOFFSET (objfile->section_offsets,
1485 SECT_OFF_TEXT (objfile))));
1487 local_symbols = newobj->locals;
1492 process_xcoff_symbol (cs, objfile);
1497 if (get_last_source_file ())
1499 struct compunit_symtab *cust;
1501 complete_symtab (filestring, file_start_addr);
1502 cur_src_end_addr = file_end_addr;
1503 cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1504 /* When reading symbols for the last C_FILE of the objfile, try
1505 to make sure that we set pst->compunit_symtab to the symtab for the
1506 file, not to the _globals_ symtab. I'm not sure whether this
1507 actually works right or when/if it comes up. */
1508 if (pst->compunit_symtab == NULL)
1509 pst->compunit_symtab = cust;
1514 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1515 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1516 *(SYMBOL2) = *(SYMBOL1);
1519 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1520 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1521 (NAME), strlen (NAME)))
1524 /* process one xcoff symbol. */
1526 static struct symbol *
1527 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1529 struct symbol onesymbol;
1530 struct symbol *sym = &onesymbol;
1531 struct symbol *sym2 = NULL;
1537 if (cs->c_secnum < 0)
1539 /* The value is a register number, offset within a frame, etc.,
1540 and does not get relocated. */
1546 sec = secnum_to_section (cs->c_secnum, objfile);
1547 off = ANOFFSET (objfile->section_offsets, sec);
1554 initialize_objfile_symbol (sym);
1556 /* default assumptions */
1557 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1558 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1559 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1561 if (ISFCN (cs->c_type))
1563 /* At this point, we don't know the type of the function. This
1564 will be patched with the type from its stab entry later on in
1565 patch_block_stabs (), unless the file was compiled without -g. */
1567 SYMBOL_SET_LINKAGE_NAME (sym, ((const char *)
1568 SYMNAME_ALLOC (name, symname_alloced)));
1569 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1571 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1572 SYMBOL_DUP (sym, sym2);
1574 if (cs->c_sclass == C_EXT)
1575 add_symbol_to_list (sym2, &global_symbols);
1576 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1577 add_symbol_to_list (sym2, &file_symbols);
1581 /* In case we can't figure out the type, provide default. */
1582 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1584 switch (cs->c_sclass)
1587 /* The values of functions and global symbols are now resolved
1588 via the global_sym_chain in stabsread.c. */
1590 if (fcn_cs_saved.c_sclass == C_EXT)
1591 add_stab_to_list (name, &global_stabs);
1593 add_stab_to_list (name, &file_stabs);
1597 add_stab_to_list (name, &global_stabs);
1602 common_block_start (cs->c_name, objfile);
1606 common_block_end (objfile);
1610 complaint (&symfile_complaints, _("Unexpected storage class: %d"),
1623 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1626 SYMBOL_SECTION (sym) = sec;
1633 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1634 all statics and we need to distinguish file-scope versus
1635 function-scope using within_function. We do this by
1636 changing the string we pass to define_symbol to use 'S'
1637 where we need to, which is not necessarily super-clean,
1638 but seems workable enough. */
1643 pp = strchr (name, ':');
1648 if (*pp == 'V' && !within_function)
1650 sym = define_symbol ((cs->c_value
1651 + ANOFFSET (objfile->section_offsets,
1652 static_block_section)),
1653 cs->c_name, 0, 0, objfile);
1656 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1657 SYMBOL_SECTION (sym) = static_block_section;
1666 /* Extract the file name from the aux entry of a C_FILE symbol.
1667 Result is in static storage and is only good for temporary use. */
1670 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1672 static char buffer[BUFSIZ];
1674 if (aux_entry->x_file.x_n.x_zeroes == 0)
1675 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1676 + aux_entry->x_file.x_n.x_offset));
1679 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1680 buffer[FILNMLEN] = '\0';
1685 /* Set *SYMBOL to symbol number symno in symtbl. */
1687 read_symbol (struct internal_syment *symbol, int symno)
1689 struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1690 int nsyms = xcoff->symtbl_num_syms;
1691 char *stbl = xcoff->symtbl;
1693 if (symno < 0 || symno >= nsyms)
1695 complaint (&symfile_complaints, _("Invalid symbol offset"));
1696 symbol->n_value = 0;
1697 symbol->n_scnum = -1;
1700 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1701 stbl + (symno * local_symesz),
1705 /* Get value corresponding to symbol number symno in symtbl. */
1708 read_symbol_nvalue (int symno)
1710 struct internal_syment symbol[1];
1712 read_symbol (symbol, symno);
1713 return symbol->n_value;
1717 /* Find the address of the function corresponding to symno, where
1718 symno is the symbol pointed to by the linetable. */
1721 read_symbol_lineno (int symno)
1723 struct objfile *objfile = this_symtab_objfile;
1724 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1726 struct coff_symfile_info *info = XCOFF_DATA (objfile);
1727 int nsyms = info->symtbl_num_syms;
1728 char *stbl = info->symtbl;
1729 char *strtbl = info->strtbl;
1731 struct internal_syment symbol[1];
1732 union internal_auxent main_aux[1];
1736 bf_notfound_complaint ();
1740 /* Note that just searching for a short distance (e.g. 50 symbols)
1741 is not enough, at least in the following case.
1744 [many .stabx entries]
1745 [a few functions, referring to foo]
1749 What happens here is that the assembler moves the .stabx entries
1750 to right before the ".bf" for foo, but the symbol for "foo" is before
1751 all the stabx entries. See PR gdb/2222. */
1753 /* Maintaining a table of .bf entries might be preferable to this search.
1754 If I understand things correctly it would need to be done only for
1755 the duration of a single psymtab to symtab conversion. */
1756 while (symno < nsyms)
1758 bfd_coff_swap_sym_in (symfile_bfd,
1759 stbl + (symno * local_symesz), symbol);
1760 if (symbol->n_sclass == C_FCN)
1762 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1764 if (strcmp (name, ".bf") == 0)
1767 symno += symbol->n_numaux + 1;
1770 bf_notfound_complaint ();
1774 /* Take aux entry and return its lineno. */
1776 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1777 symbol->n_type, symbol->n_sclass,
1778 0, symbol->n_numaux, main_aux);
1780 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1783 /* Support for line number handling. */
1785 /* This function is called for every section; it finds the outer limits
1786 * of the line table (minimum and maximum file offset) so that the
1787 * mainline code can read the whole thing for efficiency.
1790 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1792 struct coff_symfile_info *info;
1794 file_ptr offset, maxoff;
1796 count = asect->lineno_count;
1798 if (strcmp (asect->name, ".text") != 0 || count == 0)
1801 size = count * coff_data (abfd)->local_linesz;
1802 info = (struct coff_symfile_info *) vpinfo;
1803 offset = asect->line_filepos;
1804 maxoff = offset + size;
1806 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1807 info->min_lineno_offset = offset;
1809 if (maxoff > info->max_lineno_offset)
1810 info->max_lineno_offset = maxoff;
1814 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1816 struct cleanup *old_chain;
1825 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1830 /* Read in all partial symtabs on which this one is dependent. */
1831 for (i = 0; i < pst->number_of_dependencies; i++)
1832 if (!pst->dependencies[i]->readin)
1834 /* Inform about additional files that need to be read in. */
1837 fputs_filtered (" ", gdb_stdout);
1839 fputs_filtered ("and ", gdb_stdout);
1841 printf_filtered ("%s...", pst->dependencies[i]->filename);
1842 wrap_here (""); /* Flush output */
1843 gdb_flush (gdb_stdout);
1845 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1848 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1850 /* Init stuff necessary for reading in symbols. */
1853 old_chain = make_cleanup (really_free_pendings, 0);
1855 read_xcoff_symtab (objfile, pst);
1857 do_cleanups (old_chain);
1863 /* Read in all of the symbols for a given psymtab for real.
1864 Be verbose about it if the user wants that. SELF is not NULL. */
1867 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1872 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1877 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1878 || self->number_of_dependencies)
1880 /* Print the message now, before reading the string table,
1881 to avoid disconcerting pauses. */
1884 printf_filtered ("Reading in symbols for %s...", self->filename);
1885 gdb_flush (gdb_stdout);
1888 next_symbol_text_func = xcoff_next_symbol_text;
1890 xcoff_psymtab_to_symtab_1 (objfile, self);
1892 /* Match with global symbols. This only needs to be done once,
1893 after all of the symtabs and dependencies have been read in. */
1894 scan_file_globals (objfile);
1896 /* Finish up the debug error message. */
1898 printf_filtered ("done.\n");
1903 xcoff_new_init (struct objfile *objfile)
1905 stabsread_new_init ();
1906 buildsym_new_init ();
1909 /* Do initialization in preparation for reading symbols from OBJFILE.
1911 We will only be called if this is an XCOFF or XCOFF-like file.
1912 BFD handles figuring out the format of the file, and code in symfile.c
1913 uses BFD's determination to vector to us. */
1916 xcoff_symfile_init (struct objfile *objfile)
1918 struct coff_symfile_info *xcoff;
1920 /* Allocate struct to keep track of the symfile. */
1921 xcoff = XNEW (struct coff_symfile_info);
1922 set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
1924 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1925 find this causes a significant slowdown in gdb then we could
1926 set it in the debug symbol readers only when necessary. */
1927 objfile->flags |= OBJF_REORDERED;
1930 /* Perform any local cleanups required when we are done with a particular
1931 objfile. I.E, we are in the process of discarding all symbol information
1932 for an objfile, freeing up all memory held for it, and unlinking the
1933 objfile struct from the global list of known objfiles. */
1936 xcoff_symfile_finish (struct objfile *objfile)
1938 /* Start with a fresh include table for the next objfile. */
1944 inclIndx = inclLength = inclDepth = 0;
1946 dwarf2_free_objfile (objfile);
1951 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1955 unsigned char lengthbuf[4];
1957 struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
1959 xcoff->strtbl = NULL;
1961 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1962 error (_("cannot seek to string table in %s: %s"),
1963 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1965 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1966 length = bfd_h_get_32 (abfd, lengthbuf);
1968 /* If no string table is needed, then the file may end immediately
1969 after the symbols. Just return with `strtbl' set to NULL. */
1971 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1974 /* Allocate string table from objfile_obstack. We will need this table
1975 as long as we have its symbol table around. */
1977 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1978 xcoff->strtbl = strtbl;
1980 /* Copy length buffer, the first byte is usually zero and is
1981 used for stabs with a name length of zero. */
1982 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1983 if (length == sizeof lengthbuf)
1986 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1988 if (val != length - sizeof lengthbuf)
1989 error (_("cannot read string table from %s: %s"),
1990 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1991 if (strtbl[length - 1] != '\0')
1992 error (_("bad symbol file: string table "
1993 "does not end with null character"));
1998 /* If we have not yet seen a function for this psymtab, this is 0. If we
1999 have seen one, it is the offset in the line numbers of the line numbers
2001 static unsigned int first_fun_line_offset;
2003 /* Allocate and partially fill a partial symtab. It will be
2004 completely filled at the end of the symbol list.
2006 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2007 is the address relative to which its symbols are (incremental) or 0
2010 static struct partial_symtab *
2011 xcoff_start_psymtab (struct objfile *objfile,
2012 const char *filename, int first_symnum,
2013 struct partial_symbol **global_syms,
2014 struct partial_symbol **static_syms)
2016 struct partial_symtab *result =
2017 start_psymtab_common (objfile,
2019 /* We fill in textlow later. */
2021 global_syms, static_syms);
2023 result->read_symtab_private =
2024 XOBNEW (&objfile->objfile_obstack, struct symloc);
2025 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2026 result->read_symtab = xcoff_read_symtab;
2028 /* Deduce the source language from the filename for this psymtab. */
2029 psymtab_language = deduce_language_from_filename (filename);
2034 /* Close off the current usage of PST.
2035 Returns PST, or NULL if the partial symtab was empty and thrown away.
2037 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2039 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2040 are the information for includes and dependencies. */
2042 static struct partial_symtab *
2043 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2044 const char **include_list, int num_includes,
2045 int capping_symbol_number,
2046 struct partial_symtab **dependency_list,
2047 int number_dependencies, int textlow_not_set)
2051 if (capping_symbol_number != -1)
2052 ((struct symloc *) pst->read_symtab_private)->numsyms =
2053 capping_symbol_number
2054 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2055 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2056 first_fun_line_offset;
2057 first_fun_line_offset = 0;
2059 end_psymtab_common (objfile, pst);
2061 pst->number_of_dependencies = number_dependencies;
2062 if (number_dependencies)
2064 pst->dependencies = XOBNEWVEC (&objfile->objfile_obstack,
2065 struct partial_symtab *,
2066 number_dependencies);
2067 memcpy (pst->dependencies, dependency_list,
2068 number_dependencies * sizeof (struct partial_symtab *));
2071 pst->dependencies = 0;
2073 for (i = 0; i < num_includes; i++)
2075 struct partial_symtab *subpst =
2076 allocate_psymtab (include_list[i], objfile);
2078 subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
2079 sizeof (struct symloc));
2080 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2081 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2082 subpst->textlow = 0;
2083 subpst->texthigh = 0;
2085 /* We could save slight bits of space by only making one of these,
2086 shared by the entire set of include files. FIXME-someday. */
2087 subpst->dependencies =
2088 XOBNEW (&objfile->objfile_obstack, struct partial_symtab *);
2089 subpst->dependencies[0] = pst;
2090 subpst->number_of_dependencies = 1;
2092 subpst->globals_offset =
2093 subpst->n_global_syms =
2094 subpst->statics_offset =
2095 subpst->n_static_syms = 0;
2098 subpst->compunit_symtab = NULL;
2099 subpst->read_symtab = pst->read_symtab;
2102 if (num_includes == 0
2103 && number_dependencies == 0
2104 && pst->n_global_syms == 0
2105 && pst->n_static_syms == 0)
2107 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2108 it is on the obstack, but we can forget to chain it on the list. */
2109 /* Empty psymtabs happen as a result of header files which don't have
2110 any symbols in them. There can be a lot of them. */
2112 discard_psymtab (objfile, pst);
2114 /* Indicate that psymtab was thrown away. */
2120 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2121 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2122 the symbol and its auxents. */
2125 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2126 const char **name, char **raw, unsigned int *symnump,
2127 struct objfile *objfile)
2129 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2130 if (symbol->n_zeroes)
2132 /* If it's exactly E_SYMNMLEN characters long it isn't
2134 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2136 /* FIXME: wastes memory for symbols which we don't end up putting
2137 into the minimal symbols. */
2140 p = (char *) obstack_alloc (&objfile->objfile_obstack,
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;
2192 /* Current partial symtab */
2193 struct partial_symtab *pst;
2195 /* List of current psymtab's include files. */
2196 const char **psymtab_include_list;
2197 int includes_allocated;
2200 /* Index within current psymtab dependency list. */
2201 struct partial_symtab **dependency_list;
2202 int dependencies_used, dependencies_allocated;
2205 struct internal_syment symbol;
2206 union internal_auxent main_aux[5];
2207 unsigned int ssymnum;
2209 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2210 CORE_ADDR last_csect_val = 0;
2211 int last_csect_sec = 0;
2212 int misc_func_recorded = 0; /* true if any misc. function. */
2213 int textlow_not_set = 1;
2215 pst = (struct partial_symtab *) 0;
2217 includes_allocated = 30;
2219 psymtab_include_list = (const char **) alloca (includes_allocated *
2220 sizeof (const char *));
2222 dependencies_allocated = 30;
2223 dependencies_used = 0;
2225 (struct partial_symtab **) alloca (dependencies_allocated *
2226 sizeof (struct partial_symtab *));
2228 set_last_source_file (NULL);
2230 abfd = objfile->obfd;
2231 next_symbol_text_func = xcoff_next_symbol_text;
2233 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2234 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2236 while (ssymnum < nsyms)
2242 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2243 sclass = symbol.n_sclass;
2250 /* The CSECT auxent--always the last auxent. */
2251 union internal_auxent csect_aux;
2252 unsigned int symnum_before = ssymnum;
2254 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2256 if (symbol.n_numaux > 1)
2258 bfd_coff_swap_aux_in
2260 sraw_symbol - coff_data (abfd)->local_symesz,
2263 symbol.n_numaux - 1,
2268 csect_aux = main_aux[0];
2270 /* If symbol name starts with ".$" or "$", ignore it. */
2271 if (namestring[0] == '$'
2272 || (namestring[0] == '.' && namestring[1] == '$'))
2275 switch (csect_aux.x_csect.x_smtyp & 0x7)
2278 switch (csect_aux.x_csect.x_smclas)
2281 if (last_csect_name)
2283 /* If no misc. function recorded in the last
2284 seen csect, enter it as a function. This
2285 will take care of functions like strcmp()
2288 if (!misc_func_recorded)
2290 record_minimal_symbol
2291 (last_csect_name, last_csect_val,
2292 mst_text, last_csect_sec, objfile);
2293 misc_func_recorded = 1;
2298 /* We have to allocate one psymtab for
2299 each program csect, because their text
2300 sections need not be adjacent. */
2302 (objfile, pst, psymtab_include_list,
2303 includes_used, symnum_before, dependency_list,
2304 dependencies_used, textlow_not_set);
2306 dependencies_used = 0;
2307 /* Give all psymtabs for this source file the same
2309 pst = xcoff_start_psymtab
2313 objfile->global_psymbols.next,
2314 objfile->static_psymbols.next);
2317 /* Activate the misc_func_recorded mechanism for
2318 compiler- and linker-generated CSECTs like ".strcmp"
2320 if (namestring && (namestring[0] == '.'
2321 || namestring[0] == '@'))
2323 last_csect_name = namestring;
2324 last_csect_val = symbol.n_value;
2325 last_csect_sec = symbol.n_scnum;
2330 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2332 if (highval > pst->texthigh)
2333 pst->texthigh = highval;
2334 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2335 pst->textlow = symbol.n_value;
2337 misc_func_recorded = 0;
2342 /* Data variables are recorded in the minimal symbol
2343 table, except for section symbols. */
2344 if (*namestring != '.')
2345 record_minimal_symbol
2346 (namestring, symbol.n_value,
2347 sclass == C_HIDEXT ? mst_file_data : mst_data,
2348 symbol.n_scnum, objfile);
2353 warning (_("More than one XMC_TC0 symbol found."));
2354 toc_offset = symbol.n_value;
2356 /* Make TOC offset relative to start address of
2358 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2360 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2364 /* These symbols tell us where the TOC entry for a
2365 variable is, not the variable itself. */
2374 switch (csect_aux.x_csect.x_smclas)
2377 /* A function entry point. */
2379 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2380 first_fun_line_offset =
2381 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2383 record_minimal_symbol
2384 (namestring, symbol.n_value,
2385 sclass == C_HIDEXT ? mst_file_text : mst_text,
2386 symbol.n_scnum, objfile);
2387 misc_func_recorded = 1;
2391 /* shared library function trampoline code entry
2394 /* record trampoline code entries as
2395 mst_solib_trampoline symbol. When we lookup mst
2396 symbols, we will choose mst_text over
2397 mst_solib_trampoline. */
2398 record_minimal_symbol
2399 (namestring, symbol.n_value,
2400 mst_solib_trampoline, symbol.n_scnum, objfile);
2401 misc_func_recorded = 1;
2405 /* The symbols often have the same names as
2406 debug symbols for functions, and confuse
2412 /* xlc puts each variable in a separate csect,
2413 so we get an XTY_SD for each variable. But
2414 gcc puts several variables in a csect, so
2415 that each variable only gets an XTY_LD. We
2416 still need to record them. This will
2417 typically be XMC_RW; I suspect XMC_RO and
2418 XMC_BS might be possible too. */
2419 if (*namestring != '.')
2420 record_minimal_symbol
2421 (namestring, symbol.n_value,
2422 sclass == C_HIDEXT ? mst_file_data : mst_data,
2423 symbol.n_scnum, objfile);
2429 switch (csect_aux.x_csect.x_smclas)
2433 /* Common variables are recorded in the minimal symbol
2434 table, except for section symbols. */
2435 if (*namestring != '.')
2436 record_minimal_symbol
2437 (namestring, symbol.n_value,
2438 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2439 symbol.n_scnum, objfile);
2451 unsigned int symnum_before;
2453 symnum_before = ssymnum;
2454 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2457 /* See if the last csect needs to be recorded. */
2459 if (last_csect_name && !misc_func_recorded)
2461 /* If no misc. function recorded in the last seen csect, enter
2462 it as a function. This will take care of functions like
2463 strcmp() compiled by xlc. */
2465 record_minimal_symbol (last_csect_name, last_csect_val,
2466 mst_text, last_csect_sec, objfile);
2467 misc_func_recorded = 1;
2472 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2473 includes_used, symnum_before,
2474 dependency_list, dependencies_used,
2477 dependencies_used = 0;
2479 first_fun_line_offset = 0;
2481 /* XCOFF, according to the AIX 3.2 documentation, puts the
2482 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2483 do things the standard COFF way and put it in the auxent.
2484 We use the auxent if the symbol is ".file" and an auxent
2485 exists, otherwise use the symbol itself. */
2486 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2488 filestring = coff_getfilename (&main_aux[0], objfile);
2491 filestring = namestring;
2493 pst = xcoff_start_psymtab (objfile,
2496 objfile->global_psymbols.next,
2497 objfile->static_psymbols.next);
2498 last_csect_name = NULL;
2504 complaint (&symfile_complaints,
2505 _("Storage class %d not recognized during scan"),
2510 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2511 to handle only the C_FUN and C_EXT. */
2526 /* C_EINCL means we are switching back to the main file. But there
2527 is no reason to care; the only thing we want to know about
2528 includes is the names of all the included (.h) files. */
2533 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2537 /* I don't think the name of the common block (as opposed to the
2538 variables within it) is something which is user visible
2546 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2547 so C_LSYM would appear to be only for locals. */
2553 /* We probably could save a few instructions by assuming that
2554 C_LSYM, C_PSYM, etc., never have auxents. */
2555 int naux1 = symbol.n_numaux + 1;
2558 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2564 /* Mark down an include file in the current psymtab. */
2565 enum language tmp_language;
2567 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2570 tmp_language = deduce_language_from_filename (namestring);
2572 /* Only change the psymtab's language if we've learned
2573 something useful (eg. tmp_language is not language_unknown).
2574 In addition, to match what start_subfile does, never change
2576 if (tmp_language != language_unknown
2577 && (tmp_language != language_c
2578 || psymtab_language != language_cplus))
2579 psymtab_language = tmp_language;
2581 /* In C++, one may expect the same filename to come round many
2582 times, when code is coming alternately from the main file
2583 and from inline functions in other files. So I check to see
2584 if this is a file we've seen before -- either the main
2585 source file, or a previously included file.
2587 This seems to be a lot of time to be spending on N_SOL, but
2588 things like "break c-exp.y:435" need to work (I
2589 suppose the psymtab_include_list could be hashed or put
2590 in a binary tree, if profiling shows this is a major hog). */
2591 if (pst && strcmp (namestring, pst->filename) == 0)
2597 for (i = 0; i < includes_used; i++)
2598 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2606 psymtab_include_list[includes_used++] = namestring;
2607 if (includes_used >= includes_allocated)
2609 const char **orig = psymtab_include_list;
2611 psymtab_include_list = (const char **)
2612 alloca ((includes_allocated *= 2) *
2613 sizeof (const char *));
2614 memcpy (psymtab_include_list, orig,
2615 includes_used * sizeof (const char *));
2620 /* The value of the C_FUN is not the address of the function (it
2621 appears to be the address before linking), but as long as it
2622 is smaller than the actual address, then find_pc_partial_function
2623 will use the minimal symbols instead. I hope. */
2632 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2635 p = strchr (namestring, ':');
2637 continue; /* Not a debugging symbol. */
2639 /* Main processing section for debugging symbols which
2640 the initial read through the symbol tables needs to worry
2641 about. If we reach this point, the symbol which we are
2642 considering is definitely one we are interested in.
2643 p must also contain the (valid) index into the namestring
2644 which indicates the debugging type symbol. */
2649 symbol.n_value += ANOFFSET (objfile->section_offsets,
2650 SECT_OFF_DATA (objfile));
2652 if (gdbarch_static_transform_name_p (gdbarch))
2653 namestring = gdbarch_static_transform_name
2654 (gdbarch, namestring);
2656 add_psymbol_to_list (namestring, p - namestring, 1,
2657 VAR_DOMAIN, LOC_STATIC,
2658 &objfile->static_psymbols,
2660 psymtab_language, objfile);
2664 symbol.n_value += ANOFFSET (objfile->section_offsets,
2665 SECT_OFF_DATA (objfile));
2666 /* The addresses in these entries are reported to be
2667 wrong. See the code that reads 'G's for symtabs. */
2668 add_psymbol_to_list (namestring, p - namestring, 1,
2669 VAR_DOMAIN, LOC_STATIC,
2670 &objfile->global_psymbols,
2672 psymtab_language, objfile);
2676 /* When a 'T' entry is defining an anonymous enum, it
2677 may have a name which is the empty string, or a
2678 single space. Since they're not really defining a
2679 symbol, those shouldn't go in the partial symbol
2680 table. We do pick up the elements of such enums at
2681 'check_enum:', below. */
2682 if (p >= namestring + 2
2683 || (p == namestring + 1
2684 && namestring[0] != ' '))
2686 add_psymbol_to_list (namestring, p - namestring, 1,
2687 STRUCT_DOMAIN, LOC_TYPEDEF,
2688 &objfile->static_psymbols,
2689 0, psymtab_language, objfile);
2692 /* Also a typedef with the same name. */
2693 add_psymbol_to_list (namestring, p - namestring, 1,
2694 VAR_DOMAIN, LOC_TYPEDEF,
2695 &objfile->static_psymbols,
2696 0, psymtab_language, objfile);
2703 if (p != namestring) /* a name is there, not just :T... */
2705 add_psymbol_to_list (namestring, p - namestring, 1,
2706 VAR_DOMAIN, LOC_TYPEDEF,
2707 &objfile->static_psymbols,
2708 0, psymtab_language, objfile);
2711 /* If this is an enumerated type, we need to
2712 add all the enum constants to the partial symbol
2713 table. This does not cover enums without names, e.g.
2714 "enum {a, b} c;" in C, but fortunately those are
2715 rare. There is no way for GDB to find those from the
2716 enum type without spending too much time on it. Thus
2717 to solve this problem, the compiler needs to put out the
2718 enum in a nameless type. GCC2 does this. */
2720 /* We are looking for something of the form
2721 <name> ":" ("t" | "T") [<number> "="] "e"
2722 {<constant> ":" <value> ","} ";". */
2724 /* Skip over the colon and the 't' or 'T'. */
2726 /* This type may be given a number. Also, numbers can come
2727 in pairs like (0,26). Skip over it. */
2728 while ((*p >= '0' && *p <= '9')
2729 || *p == '(' || *p == ',' || *p == ')'
2735 /* The aix4 compiler emits extra crud before the
2739 /* Skip over the type (?). */
2743 /* Skip over the colon. */
2747 /* We have found an enumerated type. */
2748 /* According to comments in read_enum_type
2749 a comma could end it instead of a semicolon.
2750 I don't know where that happens.
2752 while (*p && *p != ';' && *p != ',')
2756 /* Check for and handle cretinous dbx symbol name
2758 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2759 p = next_symbol_text (objfile);
2761 /* Point to the character after the name
2762 of the enum constant. */
2763 for (q = p; *q && *q != ':'; q++)
2765 /* Note that the value doesn't matter for
2766 enum constants in psymtabs, just in symtabs. */
2767 add_psymbol_to_list (p, q - p, 1,
2768 VAR_DOMAIN, LOC_CONST,
2769 &objfile->static_psymbols,
2770 0, psymtab_language, objfile);
2771 /* Point past the name. */
2773 /* Skip over the value. */
2774 while (*p && *p != ',')
2776 /* Advance past the comma. */
2784 /* Constant, e.g. from "const" in Pascal. */
2785 add_psymbol_to_list (namestring, p - namestring, 1,
2786 VAR_DOMAIN, LOC_CONST,
2787 &objfile->static_psymbols,
2788 0, psymtab_language, objfile);
2794 int name_len = p - namestring;
2795 char *name = (char *) xmalloc (name_len + 1);
2797 memcpy (name, namestring, name_len);
2798 name[name_len] = '\0';
2799 function_outside_compilation_unit_complaint (name);
2802 symbol.n_value += ANOFFSET (objfile->section_offsets,
2803 SECT_OFF_TEXT (objfile));
2804 add_psymbol_to_list (namestring, p - namestring, 1,
2805 VAR_DOMAIN, LOC_BLOCK,
2806 &objfile->static_psymbols,
2808 psymtab_language, objfile);
2811 /* Global functions were ignored here, but now they
2812 are put into the global psymtab like one would expect.
2813 They're also in the minimal symbol table. */
2817 int name_len = p - namestring;
2818 char *name = (char *) xmalloc (name_len + 1);
2820 memcpy (name, namestring, name_len);
2821 name[name_len] = '\0';
2822 function_outside_compilation_unit_complaint (name);
2826 /* We need only the minimal symbols for these
2827 loader-generated definitions. Keeping the global
2828 symbols leads to "in psymbols but not in symbols"
2830 if (startswith (namestring, "@FIX"))
2833 symbol.n_value += ANOFFSET (objfile->section_offsets,
2834 SECT_OFF_TEXT (objfile));
2835 add_psymbol_to_list (namestring, p - namestring, 1,
2836 VAR_DOMAIN, LOC_BLOCK,
2837 &objfile->global_psymbols,
2839 psymtab_language, objfile);
2842 /* Two things show up here (hopefully); static symbols of
2843 local scope (static used inside braces) or extensions
2844 of structure symbols. We can ignore both. */
2858 case '#': /* For symbol identification (used in
2863 /* It is a C++ nested symbol. We don't need to record it
2864 (I don't think); if we try to look up foo::bar::baz,
2865 then symbols for the symtab containing foo should get
2866 read in, I think. */
2867 /* Someone says sun cc puts out symbols like
2868 /foo/baz/maclib::/usr/local/bin/maclib,
2869 which would get here with a symbol type of ':'. */
2873 /* Unexpected symbol descriptor. The second and
2874 subsequent stabs of a continued stab can show up
2875 here. The question is whether they ever can mimic
2876 a normal stab--it would be nice if not, since we
2877 certainly don't want to spend the time searching to
2878 the end of every string looking for a
2881 complaint (&symfile_complaints,
2882 _("unknown symbol descriptor `%c'"), p[1]);
2884 /* Ignore it; perhaps it is an extension that we don't
2894 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2895 ssymnum, dependency_list,
2896 dependencies_used, textlow_not_set);
2899 /* Record the toc offset value of this symbol table into objfile
2900 structure. If no XMC_TC0 is found, toc_offset should be zero.
2901 Another place to obtain this information would be file auxiliary
2904 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2907 /* Return the toc offset value for a given objfile. */
2910 xcoff_get_toc_offset (struct objfile *objfile)
2913 return XCOFF_DATA (objfile)->toc_offset;
2917 /* Scan and build partial symbols for a symbol file.
2918 We have been initialized by a call to dbx_symfile_init, which
2919 put all the relevant info into a "struct dbx_symfile_info",
2920 hung off the objfile structure.
2922 SECTION_OFFSETS contains offsets relative to which the symbols in the
2923 various sections are (depending where the sections were actually
2927 xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
2931 struct cleanup *back_to;
2932 int num_symbols; /* # of symbols */
2933 file_ptr symtab_offset; /* symbol table and */
2934 file_ptr stringtab_offset; /* string table file offsets */
2935 struct coff_symfile_info *info;
2939 info = XCOFF_DATA (objfile);
2940 symfile_bfd = abfd = objfile->obfd;
2941 name = objfile_name (objfile);
2943 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2944 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2945 stringtab_offset = symtab_offset +
2946 num_symbols * coff_data (abfd)->local_symesz;
2948 info->min_lineno_offset = 0;
2949 info->max_lineno_offset = 0;
2950 bfd_map_over_sections (abfd, find_linenos, info);
2952 if (num_symbols > 0)
2954 /* Read the string table. */
2955 init_stringtab (abfd, stringtab_offset, objfile);
2957 /* Read the .debug section, if present. */
2959 struct bfd_section *secp;
2960 bfd_size_type length;
2961 bfd_byte *debugsec = NULL;
2963 secp = bfd_get_section_by_name (abfd, ".debug");
2966 length = bfd_section_size (abfd, secp);
2970 = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
2973 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2975 error (_("Error reading .debug section of `%s': %s"),
2976 name, bfd_errmsg (bfd_get_error ()));
2980 info->debugsec = (char *) debugsec;
2984 /* Read the symbols. We keep them in core because we will want to
2985 access them randomly in read_symbol*. */
2986 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2988 error (_("Error reading symbols from %s: %s"),
2989 name, bfd_errmsg (bfd_get_error ()));
2990 size = coff_data (abfd)->local_symesz * num_symbols;
2991 info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size);
2992 info->symtbl_num_syms = num_symbols;
2994 val = bfd_bread (info->symtbl, size, abfd);
2996 perror_with_name (_("reading symbol table"));
2998 /* If we are reinitializing, or if we have never loaded syms yet, init. */
2999 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3000 /* I'm not sure how how good num_symbols is; the rule of thumb in
3001 init_psymbol_list was developed for a.out. On the one hand,
3002 num_symbols includes auxents. On the other hand, it doesn't
3004 init_psymbol_list (objfile, num_symbols);
3006 free_pending_blocks ();
3007 back_to = make_cleanup (really_free_pendings, 0);
3009 minimal_symbol_reader reader;
3011 /* Now that the symbol table data of the executable file are all in core,
3012 process them and define symbols accordingly. */
3014 scan_xcoff_symtab (objfile);
3016 /* Install any minimal symbols that have been collected as the current
3017 minimal symbols for this objfile. */
3019 reader.install (objfile);
3021 /* DWARF2 sections. */
3023 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3024 dwarf2_build_psymtabs (objfile);
3026 dwarf2_build_frame_info (objfile);
3028 do_cleanups (back_to);
3032 xcoff_symfile_offsets (struct objfile *objfile,
3033 const struct section_addr_info *addrs)
3035 const char *first_section_name;
3037 default_symfile_offsets (objfile, addrs);
3039 /* Oneof the weird side-effects of default_symfile_offsets is that
3040 it sometimes sets some section indices to zero for sections that,
3041 in fact do not exist. See the body of default_symfile_offsets
3042 for more info on when that happens. Undo that, as this then allows
3043 us to test whether the associated section exists or not, and then
3044 access it quickly (without searching it again). */
3046 if (objfile->num_sections == 0)
3047 return; /* Is that even possible? Better safe than sorry. */
3050 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3052 if (objfile->sect_index_text == 0
3053 && strcmp (first_section_name, ".text") != 0)
3054 objfile->sect_index_text = -1;
3056 if (objfile->sect_index_data == 0
3057 && strcmp (first_section_name, ".data") != 0)
3058 objfile->sect_index_data = -1;
3060 if (objfile->sect_index_bss == 0
3061 && strcmp (first_section_name, ".bss") != 0)
3062 objfile->sect_index_bss = -1;
3064 if (objfile->sect_index_rodata == 0
3065 && strcmp (first_section_name, ".rodata") != 0)
3066 objfile->sect_index_rodata = -1;
3069 /* Register our ability to parse symbols for xcoff BFD files. */
3071 static const struct sym_fns xcoff_sym_fns =
3074 /* It is possible that coff and xcoff should be merged as
3075 they do have fundamental similarities (for example, the extra storage
3076 classes used for stabs could presumably be recognized in any COFF file).
3077 However, in addition to obvious things like all the csect hair, there are
3078 some subtler differences between xcoffread.c and coffread.c, notably
3079 the fact that coffread.c has no need to read in all the symbols, but
3080 xcoffread.c reads all the symbols and does in fact randomly access them
3081 (in C_BSTAT and line number processing). */
3083 xcoff_new_init, /* init anything gbl to entire symtab */
3084 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3085 xcoff_initial_scan, /* read a symbol file into symtab */
3086 NULL, /* sym_read_psymbols */
3087 xcoff_symfile_finish, /* finished with file, cleanup */
3088 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3089 default_symfile_segments, /* Get segment information from a file. */
3090 aix_process_linenos,
3091 default_symfile_relocate, /* Relocate a debug section. */
3092 NULL, /* sym_probe_fns */
3096 /* Same as xcoff_get_n_import_files, but for core files. */
3099 xcoff_get_core_n_import_files (bfd *abfd)
3101 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3103 file_ptr offset = 0;
3107 return -1; /* Not a core file. */
3109 for (offset = 0; offset < bfd_get_section_size (sect);)
3115 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3117 next = bfd_get_32 (abfd, buf);
3119 break; /* This is the last entry. */
3123 /* Return the number of entries, excluding the first one, which is
3124 the path to the executable that produced this core file. */
3125 return n_entries - 1;
3128 /* Return the number of import files (shared libraries) that the given
3129 BFD depends on. Return -1 if this number could not be computed. */
3132 xcoff_get_n_import_files (bfd *abfd)
3134 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3138 /* If the ".loader" section does not exist, the objfile is probably
3139 not an executable. Might be a core file... */
3141 return xcoff_get_core_n_import_files (abfd);
3143 /* The number of entries in the Import Files Table is stored in
3144 field l_nimpid. This field is always at offset 16, and is
3145 always 4 bytes long. Read those 4 bytes. */
3147 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3149 l_nimpid = bfd_get_32 (abfd, buf);
3151 /* By convention, the first entry is the default LIBPATH value
3152 to be used by the system loader, so it does not count towards
3153 the number of import files. */
3154 return l_nimpid - 1;
3157 /* Free the per-objfile xcoff data. */
3160 xcoff_free_info (struct objfile *objfile, void *arg)
3165 /* Provide a prototype to silence -Wmissing-prototypes. */
3166 extern initialize_file_ftype _initialize_xcoffread;
3169 _initialize_xcoffread (void)
3171 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
3173 xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,