1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2019 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
44 #include "buildsym-legacy.h"
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* We put a pointer to this structure in the read_symtab_private field
62 /* First symbol number for this file. */
66 /* Number of symbols in the section of the symbol table devoted to
67 this file's symbols (actually, the section bracketed may contain
68 more than just this file's symbols). If numsyms is 0, the only
69 reason for this thing's existence is the dependency list. Nothing
70 else will happen when it is read in. */
74 /* Position of the start of the line number information for this
76 unsigned int lineno_off;
79 /* Remember what we deduced to be the source language of this psymtab. */
81 static enum language psymtab_language = language_unknown;
84 /* Simplified internal version of coff symbol table information. */
89 int c_symnum; /* Symbol number of this entry. */
90 int c_naux; /* 0 if syment only, 1 if syment + auxent. */
92 unsigned char c_sclass;
97 /* Last function's saved coff symbol `cs'. */
99 static struct coff_symbol fcn_cs_saved;
101 static bfd *symfile_bfd;
103 /* Core address of start and end of text of current source file.
104 This is calculated from the first function seen after a C_FILE
108 static CORE_ADDR cur_src_end_addr;
110 /* Core address of the end of the first object file. */
112 static CORE_ADDR first_object_file_end;
114 /* Initial symbol-table-debug-string vector length. */
116 #define INITIAL_STABVECTOR_LENGTH 40
118 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
119 there is any reason not to just use a #define, but might as well
120 ask BFD for the size and store it here, I guess. */
122 static unsigned local_symesz;
124 struct xcoff_symfile_info
126 file_ptr min_lineno_offset {}; /* Where in file lowest line#s are. */
127 file_ptr max_lineno_offset {}; /* 1+last byte of line#s in file. */
129 /* Pointer to the string table. */
130 char *strtbl = nullptr;
132 /* Pointer to debug section. */
133 char *debugsec = nullptr;
135 /* Pointer to the a.out symbol table. */
136 char *symtbl = nullptr;
138 /* Number of symbols in symtbl. */
139 int symtbl_num_syms = 0;
141 /* Offset in data section to TOC anchor. */
142 CORE_ADDR toc_offset = 0;
145 /* Key for XCOFF-associated data. */
147 static const struct objfile_key<xcoff_symfile_info> xcoff_objfile_data_key;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 xcoff_objfile_data_key.get (objfile)
154 /* XCOFF names for dwarf sections. There is no compressed sections. */
156 static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
158 { ".dwabrev", NULL },
161 { NULL, NULL }, /* debug_loclists */
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 { NULL, NULL }, /* debug_line_str */
169 { ".dwrnges", NULL },
170 { NULL, NULL }, /* debug_rnglists */
171 { ".dwpbtyp", NULL },
172 { NULL, NULL }, /* debug_addr */
173 { ".dwframe", NULL },
174 { NULL, NULL }, /* eh_frame */
175 { NULL, NULL }, /* gdb_index */
176 { NULL, NULL }, /* debug_names */
177 { NULL, NULL }, /* debug_aranges */
182 bf_notfound_complaint (void)
184 complaint (_("line numbers off, `.bf' symbol not found"));
188 ef_complaint (int arg1)
190 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
194 eb_complaint (int arg1)
196 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
199 static void xcoff_initial_scan (struct objfile *, symfile_add_flags);
201 static void scan_xcoff_symtab (minimal_symbol_reader &,
204 static const 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 = XNEWVEC (struct linetable_entry, fentry_size);
445 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
447 if (oldLineTb->item[ii].line == 0)
448 { /* Function entry found. */
449 if (function_count >= fentry_size)
450 { /* Make sure you have room. */
452 fentry = (struct linetable_entry *)
454 fentry_size * sizeof (struct linetable_entry));
456 fentry[function_count].line = ii;
457 fentry[function_count].pc = oldLineTb->item[ii].pc;
460 /* If the function was compiled with XLC, we may have to add an
461 extra line entry later. Reserve space for that. */
462 if (ii + 1 < oldLineTb->nitems
463 && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
468 if (function_count == 0)
473 else if (function_count > 1)
474 qsort (fentry, function_count,
475 sizeof (struct linetable_entry), compare_lte);
477 /* Allocate a new line table. */
478 newLineTb = (struct linetable *)
480 (sizeof (struct linetable) +
481 (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
483 /* If line table does not start with a function beginning, copy up until
487 if (oldLineTb->item[0].line != 0)
489 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
490 newLineTb->item[newline] = oldLineTb->item[newline];
492 /* Now copy function lines one by one. */
494 for (ii = 0; ii < function_count; ++ii)
496 /* If the function was compiled with XLC, we may have to add an
497 extra line to cover the function prologue. */
498 jj = fentry[ii].line;
499 if (jj + 1 < oldLineTb->nitems
500 && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
502 newLineTb->item[newline] = oldLineTb->item[jj];
503 newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
507 for (jj = fentry[ii].line + 1;
508 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
510 newLineTb->item[newline] = oldLineTb->item[jj];
513 /* The number of items in the line table must include these
514 extra lines which were added in case of XLC compiled functions. */
515 newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
519 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
520 following `IncludeChain'. At the end of each symtab (end_symtab),
521 we will determine if we should create additional symtab's to
522 represent if (the include files. */
525 typedef struct _inclTable
527 char *name; /* include filename */
529 /* Offsets to the line table. end points to the last entry which is
530 part of this include file. */
533 struct subfile *subfile;
534 unsigned funStartLine; /* Start line # of its function. */
538 #define INITIAL_INCLUDE_TABLE_LENGTH 20
539 static InclTable *inclTable; /* global include table */
540 static int inclIndx; /* last entry to table */
541 static int inclLength; /* table length */
542 static int inclDepth; /* nested include depth */
544 static void allocate_include_entry (void);
547 record_include_begin (struct coff_symbol *cs)
551 /* In xcoff, we assume include files cannot be nested (not in .c files
552 of course, but in corresponding .s files.). */
554 /* This can happen with old versions of GCC.
555 GCC 2.3.3-930426 does not exhibit this on a test case which
556 a user said produced the message for him. */
557 complaint (_("Nested C_BINCL symbols"));
561 allocate_include_entry ();
563 inclTable[inclIndx].name = cs->c_name;
564 inclTable[inclIndx].begin = cs->c_value;
568 record_include_end (struct coff_symbol *cs)
574 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
577 allocate_include_entry ();
579 pTbl = &inclTable[inclIndx];
580 pTbl->end = cs->c_value;
587 allocate_include_entry (void)
589 if (inclTable == NULL)
591 inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
592 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
595 else if (inclIndx >= inclLength)
597 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
598 inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
599 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
600 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
604 /* Global variable to pass the psymtab down to all the routines involved
605 in psymtab to symtab processing. */
606 static struct partial_symtab *this_symtab_psymtab;
608 /* Objfile related to this_symtab_psymtab; set at the same time. */
609 static struct objfile *this_symtab_objfile;
611 /* given the start and end addresses of a compilation unit (or a csect,
612 at times) process its lines and create appropriate line vectors. */
615 process_linenos (CORE_ADDR start, CORE_ADDR end)
619 = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
621 /* subfile structure for the main compilation unit. */
622 struct subfile main_subfile;
624 /* In the main source file, any time we see a function entry, we
625 reset this variable to function's absolute starting line number.
626 All the following line numbers in the function are relative to
627 this, and we record absolute line numbers in record_line(). */
629 unsigned int main_source_baseline = 0;
634 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
636 goto return_after_cleanup;
638 memset (&main_subfile, '\0', sizeof (main_subfile));
641 /* All source lines were in the main source file. None in include
644 enter_line_range (&main_subfile, offset, 0, start, end,
645 &main_source_baseline);
649 /* There was source with line numbers in include files. */
652 coff_data (this_symtab_objfile->obfd)->local_linesz;
653 main_source_baseline = 0;
655 for (ii = 0; ii < inclIndx; ++ii)
657 struct subfile *tmpSubfile;
659 /* If there is main file source before include file, enter it. */
660 if (offset < inclTable[ii].begin)
663 (&main_subfile, offset, inclTable[ii].begin - linesz,
664 start, 0, &main_source_baseline);
667 if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
669 /* The entry in the include table refers to the main source
670 file. Add the lines to the main subfile. */
672 main_source_baseline = inclTable[ii].funStartLine;
674 (&main_subfile, inclTable[ii].begin, inclTable[ii].end,
675 start, 0, &main_source_baseline);
676 inclTable[ii].subfile = &main_subfile;
680 /* Have a new subfile for the include file. */
682 tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile);
684 memset (tmpSubfile, '\0', sizeof (struct subfile));
685 firstLine = &(inclTable[ii].funStartLine);
687 /* Enter include file's lines now. */
688 enter_line_range (tmpSubfile, inclTable[ii].begin,
689 inclTable[ii].end, start, 0, firstLine);
692 if (offset <= inclTable[ii].end)
693 offset = inclTable[ii].end + linesz;
696 /* All the include files' line have been processed at this point. Now,
697 enter remaining lines of the main file, if any left. */
698 if (offset < max_offset + 1 - linesz)
700 enter_line_range (&main_subfile, offset, 0, start, end,
701 &main_source_baseline);
705 /* Process main file's line numbers. */
706 if (main_subfile.line_vector)
708 struct linetable *lineTb, *lv;
710 lv = main_subfile.line_vector;
712 /* Line numbers are not necessarily ordered. xlc compilation will
713 put static function to the end. */
715 struct subfile *current_subfile = get_current_subfile ();
716 lineTb = arrange_linetable (lv);
719 current_subfile->line_vector = (struct linetable *)
720 xrealloc (lv, (sizeof (struct linetable)
721 + lv->nitems * sizeof (struct linetable_entry)));
726 current_subfile->line_vector = lineTb;
729 current_subfile->line_vector_length =
730 current_subfile->line_vector->nitems;
733 /* Now, process included files' line numbers. */
735 for (ii = 0; ii < inclIndx; ++ii)
737 if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
738 && (inclTable[ii].subfile)->line_vector) /* Useless if!!!
741 struct linetable *lineTb, *lv;
743 lv = (inclTable[ii].subfile)->line_vector;
745 /* Line numbers are not necessarily ordered. xlc compilation will
746 put static function to the end. */
748 lineTb = arrange_linetable (lv);
752 /* For the same include file, we might want to have more than one
753 subfile. This happens if we have something like:
761 while foo.h including code in it. (stupid but possible)
762 Since start_subfile() looks at the name and uses an
763 existing one if finds, we need to provide a fake name and
767 start_subfile (inclTable[ii].name);
770 /* Pick a fake name that will produce the same results as this
771 one when passed to deduce_language_from_filename. Kludge on
773 const char *fakename = strrchr (inclTable[ii].name, '.');
775 if (fakename == NULL)
777 start_subfile (fakename);
778 xfree (get_current_subfile ()->name);
780 struct subfile *current_subfile = get_current_subfile ();
781 current_subfile->name = xstrdup (inclTable[ii].name);
786 current_subfile->line_vector =
787 (struct linetable *) xrealloc
788 (lv, (sizeof (struct linetable)
789 + lv->nitems * sizeof (struct linetable_entry)));
795 current_subfile->line_vector = lineTb;
798 current_subfile->line_vector_length =
799 current_subfile->line_vector->nitems;
800 start_subfile (pop_subfile ());
804 return_after_cleanup:
806 /* We don't want to keep alloc/free'ing the global include file table. */
811 aix_process_linenos (struct objfile *objfile)
813 /* There is no linenos to read if there are only dwarf info. */
814 if (this_symtab_psymtab == NULL)
817 /* Process line numbers and enter them into line vector. */
818 process_linenos (get_last_source_start_addr (), cur_src_end_addr);
822 /* Enter a given range of lines into the line vector.
823 can be called in the following two ways:
824 enter_line_range (subfile, beginoffset, endoffset,
825 startaddr, 0, firstLine) or
826 enter_line_range (subfile, beginoffset, 0,
827 startaddr, endaddr, firstLine)
829 endoffset points to the last line table entry that we should pay
833 enter_line_range (struct subfile *subfile, unsigned beginoffset,
834 unsigned endoffset, /* offsets to line table */
835 CORE_ADDR startaddr, /* offsets to line table */
836 CORE_ADDR endaddr, unsigned *firstLine)
838 struct objfile *objfile = this_symtab_objfile;
839 struct gdbarch *gdbarch = get_objfile_arch (objfile);
840 unsigned int curoffset;
843 struct internal_lineno int_lnno;
844 unsigned int limit_offset;
848 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
850 curoffset = beginoffset;
851 limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
855 if (endoffset >= limit_offset)
857 complaint (_("Bad line table offset in C_EINCL directive"));
860 limit_offset = endoffset;
865 abfd = objfile->obfd;
866 linesz = coff_data (abfd)->local_linesz;
867 ext_lnno = alloca (linesz);
869 while (curoffset <= limit_offset)
871 bfd_seek (abfd, curoffset, SEEK_SET);
872 bfd_bread (ext_lnno, linesz, abfd);
873 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
875 /* Find the address this line represents. */
876 addr = (int_lnno.l_lnno
877 ? int_lnno.l_addr.l_paddr
878 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
879 addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
881 if (addr < startaddr || (endaddr && addr >= endaddr))
884 if (int_lnno.l_lnno == 0)
886 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
887 record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
891 record_line (subfile, *firstLine + int_lnno.l_lnno,
892 gdbarch_addr_bits_remove (gdbarch, addr));
898 /* Save the vital information for use when closing off the current file.
899 NAME is the file name the symbols came from, START_ADDR is the first
900 text address for the file, and SIZE is the number of bytes of text. */
902 #define complete_symtab(name, start_addr) { \
903 set_last_source_file (name); \
904 set_last_source_start_addr (start_addr); \
908 /* Refill the symbol table input buffer
909 and set the variables that control fetching entries from it.
910 Reports an error if no data available.
911 This function can read past the end of the symbol table
912 (into the string table) but this does no harm. */
914 /* Create a new minimal symbol (using record_with_info).
916 Creation of all new minimal symbols should go through this function
917 rather than calling the various record functions in order
918 to make sure that all symbol addresses get properly relocated.
922 NAME - the symbol's name (but if NAME starts with a period, that
923 leading period is discarded).
924 ADDRESS - the symbol's address, prior to relocation. This function
925 relocates the address before recording the minimal symbol.
926 MS_TYPE - the symbol's type.
927 N_SCNUM - the symbol's XCOFF section number.
928 OBJFILE - the objfile associated with the minimal symbol. */
931 record_minimal_symbol (minimal_symbol_reader &reader,
932 const char *name, CORE_ADDR address,
933 enum minimal_symbol_type ms_type,
935 struct objfile *objfile)
940 reader.record_with_info (name, address, ms_type,
941 secnum_to_section (n_scnum, objfile));
944 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
945 nested. At any given time, a symbol can only be in one static block.
946 This is the base address of current static block, zero if non exists. */
948 static int static_block_base = 0;
950 /* Section number for the current static block. */
952 static int static_block_section = -1;
954 /* true if space for symbol name has been allocated. */
956 static int symname_alloced = 0;
958 /* Next symbol to read. Pointer into raw seething symbol table. */
960 static char *raw_symbol;
962 /* This is the function which stabsread.c calls to get symbol
966 xcoff_next_symbol_text (struct objfile *objfile)
968 struct internal_syment symbol;
971 /* FIXME: is this the same as the passed arg? */
972 if (this_symtab_objfile)
973 objfile = this_symtab_objfile;
975 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
978 complaint (_("Unexpected symbol continuation"));
980 /* Return something which points to '\0' and hope the symbol reading
981 code does something reasonable. */
984 else if (symbol.n_sclass & 0x80)
986 retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
987 raw_symbol += coff_data (objfile->obfd)->local_symesz;
992 complaint (_("Unexpected symbol continuation"));
994 /* Return something which points to '\0' and hope the symbol reading
995 code does something reasonable. */
1001 /* Read symbols for a given partial symbol table. */
1004 read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
1006 bfd *abfd = objfile->obfd;
1007 char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
1008 struct xcoff_symfile_info *xcoff = XCOFF_DATA (objfile);
1009 char *strtbl = xcoff->strtbl;
1010 char *debugsec = xcoff->debugsec;
1011 const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
1013 struct internal_syment symbol[1];
1014 union internal_auxent main_aux;
1015 struct coff_symbol cs[1];
1016 CORE_ADDR file_start_addr = 0;
1017 CORE_ADDR file_end_addr = 0;
1019 int next_file_symnum = -1;
1020 unsigned int max_symnum;
1021 int just_started = 1;
1023 CORE_ADDR fcn_start_addr = 0;
1024 enum language pst_symtab_language;
1026 struct coff_symbol fcn_stab_saved = { 0 };
1028 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1029 union internal_auxent fcn_aux_saved = main_aux;
1030 struct context_stack *newobj;
1032 const char *filestring = pst->filename; /* Name of the current file. */
1034 const char *last_csect_name; /* Last seen csect's name. */
1036 this_symtab_psymtab = pst;
1037 this_symtab_objfile = objfile;
1039 /* Get the appropriate COFF "constants" related to the file we're
1041 local_symesz = coff_data (abfd)->local_symesz;
1043 set_last_source_file (NULL);
1044 last_csect_name = 0;
1045 pst_symtab_language = deduce_language_from_filename (filestring);
1048 start_symtab (objfile, filestring, NULL, file_start_addr,
1049 pst_symtab_language);
1050 record_debugformat (debugfmt);
1051 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
1053 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
1054 first_object_file_end = 0;
1056 raw_symbol = xcoff->symtbl + symnum * local_symesz;
1058 while (symnum < max_symnum)
1060 QUIT; /* make this command interruptable. */
1062 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1063 /* read one symbol into `cs' structure. After processing the
1064 whole symbol table, only string table will be kept in memory,
1065 symbol table and debug section of xcoff will be freed. Thus
1066 we can mark symbols with names in string table as
1071 /* Swap and align the symbol into a reasonable C structure. */
1072 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1074 cs->c_symnum = symnum;
1075 cs->c_naux = symbol->n_numaux;
1076 if (symbol->n_zeroes)
1078 symname_alloced = 0;
1079 /* We must use the original, unswapped, name here so the name field
1080 pointed to by cs->c_name will persist throughout xcoffread. If
1081 we use the new field, it gets overwritten for each symbol. */
1082 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1083 /* If it's exactly E_SYMNMLEN characters long it isn't
1085 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1089 p = (char *) obstack_alloc (&objfile->objfile_obstack,
1091 strncpy (p, cs->c_name, E_SYMNMLEN);
1092 p[E_SYMNMLEN] = '\0';
1094 symname_alloced = 1;
1097 else if (symbol->n_sclass & 0x80)
1099 cs->c_name = debugsec + symbol->n_offset;
1100 symname_alloced = 0;
1104 /* in string table */
1105 cs->c_name = strtbl + (int) symbol->n_offset;
1106 symname_alloced = 1;
1108 cs->c_value = symbol->n_value;
1109 cs->c_sclass = symbol->n_sclass;
1110 cs->c_secnum = symbol->n_scnum;
1111 cs->c_type = (unsigned) symbol->n_type;
1113 raw_symbol += local_symesz;
1116 /* Save addr of first aux entry. */
1117 raw_auxptr = raw_symbol;
1119 /* Skip all the auxents associated with this symbol. */
1120 for (ii = symbol->n_numaux; ii; --ii)
1122 raw_symbol += coff_data (abfd)->local_auxesz;
1127 /* if symbol name starts with ".$" or "$", ignore it. */
1128 if (cs->c_name[0] == '$'
1129 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1132 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1134 if (get_last_source_file ())
1136 pst->compunit_symtab = end_symtab (cur_src_end_addr,
1137 SECT_OFF_TEXT (objfile));
1142 start_symtab (objfile, "_globals_", NULL,
1143 0, pst_symtab_language);
1144 record_debugformat (debugfmt);
1145 cur_src_end_addr = first_object_file_end;
1146 /* Done with all files, everything from here on is globals. */
1149 if (cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT ||
1150 cs->c_sclass == C_WEAKEXT)
1152 /* Dealing with a symbol with a csect entry. */
1154 #define CSECT(PP) ((PP)->x_csect)
1155 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1156 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1157 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1158 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1160 /* Convert the auxent to something we can access.
1161 XCOFF can have more than one auxiliary entries.
1163 Actual functions will have two auxiliary entries, one to have the
1164 function size and other to have the smtype/smclass (LD/PR).
1166 c_type value of main symbol table will be set only in case of
1167 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1168 Bit 10 of type is set if symbol is a function, ie the value is set
1169 to 32(0x20). So we need to read the first function auxiliay entry
1170 which contains the size. */
1171 if (cs->c_naux > 1 && ISFCN (cs->c_type))
1173 /* a function entry point. */
1175 fcn_start_addr = cs->c_value;
1177 /* save the function header info, which will be used
1178 when `.bf' is seen. */
1181 /* Convert the auxent to something we can access. */
1182 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1183 0, cs->c_naux, &fcn_aux_saved);
1186 /* Read the csect auxiliary header, which is always the last by
1188 bfd_coff_swap_aux_in (abfd,
1190 + ((coff_data (abfd)->local_symesz)
1191 * (cs->c_naux - 1)),
1192 cs->c_type, cs->c_sclass,
1193 cs->c_naux - 1, cs->c_naux,
1196 switch (CSECT_SMTYP (&main_aux))
1200 /* Ignore all external references. */
1204 /* A section description. */
1206 switch (CSECT_SCLAS (&main_aux))
1212 /* A program csect is seen. We have to allocate one
1213 symbol table for each program csect. Normally gdb
1214 prefers one symtab for each source file. In case
1215 of AIX, one source file might include more than one
1216 [PR] csect, and they don't have to be adjacent in
1217 terms of the space they occupy in memory. Thus, one
1218 single source file might get fragmented in the
1219 memory and gdb's file start and end address
1220 approach does not work! GCC (and I think xlc) seem
1221 to put all the code in the unnamed program csect. */
1223 if (last_csect_name)
1225 complete_symtab (filestring, file_start_addr);
1226 cur_src_end_addr = file_end_addr;
1227 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1230 /* Give all csects for this source file the same
1232 start_symtab (objfile, filestring, NULL,
1233 0, pst_symtab_language);
1234 record_debugformat (debugfmt);
1237 /* If this is the very first csect seen,
1238 basically `__start'. */
1241 first_object_file_end
1242 = cs->c_value + CSECT_LEN (&main_aux);
1247 cs->c_value + ANOFFSET (objfile->section_offsets,
1248 SECT_OFF_TEXT (objfile));
1249 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1251 if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
1252 last_csect_name = cs->c_name;
1256 /* All other symbols are put into the minimal symbol
1269 /* Ignore the symbol. */
1277 switch (CSECT_SCLAS (&main_aux))
1279 /* We never really come to this part as this case has been
1280 handled in ISFCN check above.
1281 This and other cases of XTY_LD are kept just for
1287 /* shared library function trampoline code entry point. */
1291 /* The symbols often have the same names as debug symbols for
1292 functions, and confuse lookup_symbol. */
1296 /* xlc puts each variable in a separate csect, so we get
1297 an XTY_SD for each variable. But gcc puts several
1298 variables in a csect, so that each variable only gets
1299 an XTY_LD. This will typically be XMC_RW; I suspect
1300 XMC_RO and XMC_BS might be possible too.
1301 These variables are put in the minimal symbol table
1308 /* Common symbols are put into the minimal symbol table only. */
1316 switch (cs->c_sclass)
1320 /* c_value field contains symnum of next .file entry in table
1321 or symnum of first global after last .file. */
1323 next_file_symnum = cs->c_value;
1325 /* Complete symbol table for last object file containing
1326 debugging information. */
1328 /* Whether or not there was a csect in the previous file, we
1329 have to call `end_stabs' and `start_stabs' to reset
1330 type_vector, line_vector, etc. structures. */
1332 complete_symtab (filestring, file_start_addr);
1333 cur_src_end_addr = file_end_addr;
1334 end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1337 /* XCOFF, according to the AIX 3.2 documentation, puts the
1338 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1339 do things the standard COFF way and put it in the auxent.
1340 We use the auxent if the symbol is ".file" and an auxent
1341 exists, otherwise use the symbol itself. Simple
1343 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1345 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1346 0, cs->c_naux, &main_aux);
1347 filestring = coff_getfilename (&main_aux, objfile);
1350 filestring = cs->c_name;
1353 start_symtab (objfile, filestring, NULL, 0, pst_symtab_language);
1354 record_debugformat (debugfmt);
1355 last_csect_name = 0;
1357 /* reset file start and end addresses. A compilation unit
1358 with no text (only data) should have zero file
1360 file_start_addr = file_end_addr = 0;
1364 fcn_stab_saved = *cs;
1368 if (strcmp (cs->c_name, ".bf") == 0)
1370 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1371 SECT_OFF_TEXT (objfile));
1373 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1374 0, cs->c_naux, &main_aux);
1376 within_function = 1;
1378 newobj = push_context (0, fcn_start_addr + off);
1380 newobj->name = define_symbol
1381 (fcn_cs_saved.c_value + off,
1382 fcn_stab_saved.c_name, 0, 0, objfile);
1383 if (newobj->name != NULL)
1384 SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
1386 else if (strcmp (cs->c_name, ".ef") == 0)
1388 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1389 0, cs->c_naux, &main_aux);
1391 /* The value of .ef is the address of epilogue code;
1392 not useful for gdb. */
1393 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1394 contains number of lines to '}' */
1396 if (outermost_context_p ())
1397 { /* We attempted to pop an empty context stack. */
1398 ef_complaint (cs->c_symnum);
1399 within_function = 0;
1402 struct context_stack cstk = pop_context ();
1403 /* Stack must be empty now. */
1404 if (!outermost_context_p ())
1406 ef_complaint (cs->c_symnum);
1407 within_function = 0;
1411 finish_block (cstk.name, cstk.old_blocks,
1412 NULL, cstk.start_addr,
1413 (fcn_cs_saved.c_value
1414 + fcn_aux_saved.x_sym.x_misc.x_fsize
1415 + ANOFFSET (objfile->section_offsets,
1416 SECT_OFF_TEXT (objfile))));
1417 within_function = 0;
1422 /* Begin static block. */
1424 struct internal_syment static_symbol;
1426 read_symbol (&static_symbol, cs->c_value);
1427 static_block_base = static_symbol.n_value;
1428 static_block_section =
1429 secnum_to_section (static_symbol.n_scnum, objfile);
1434 /* End of static block. */
1435 static_block_base = 0;
1436 static_block_section = -1;
1447 complaint (_("Unrecognized storage class %d."),
1462 /* beginning of include file */
1463 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1464 order. Thus, when wee see them, we might not know enough info
1465 to process them. Thus, we'll be saving them into a table
1466 (inclTable) and postpone their processing. */
1468 record_include_begin (cs);
1472 /* End of include file. */
1473 /* See the comment after case C_BINCL. */
1474 record_include_end (cs);
1478 if (strcmp (cs->c_name, ".bb") == 0)
1481 newobj = push_context (depth,
1483 + ANOFFSET (objfile->section_offsets,
1484 SECT_OFF_TEXT (objfile))));
1486 else if (strcmp (cs->c_name, ".eb") == 0)
1488 if (outermost_context_p ())
1489 { /* We attempted to pop an empty context stack. */
1490 eb_complaint (cs->c_symnum);
1493 struct context_stack cstk = pop_context ();
1494 if (depth-- != cstk.depth)
1496 eb_complaint (cs->c_symnum);
1499 if (*get_local_symbols () && !outermost_context_p ())
1501 /* Make a block for the local symbols within. */
1502 finish_block (cstk.name,
1503 cstk.old_blocks, NULL,
1506 + ANOFFSET (objfile->section_offsets,
1507 SECT_OFF_TEXT (objfile))));
1509 *get_local_symbols () = cstk.locals;
1514 process_xcoff_symbol (cs, objfile);
1519 if (get_last_source_file ())
1521 struct compunit_symtab *cust;
1523 complete_symtab (filestring, file_start_addr);
1524 cur_src_end_addr = file_end_addr;
1525 cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
1526 /* When reading symbols for the last C_FILE of the objfile, try
1527 to make sure that we set pst->compunit_symtab to the symtab for the
1528 file, not to the _globals_ symtab. I'm not sure whether this
1529 actually works right or when/if it comes up. */
1530 if (pst->compunit_symtab == NULL)
1531 pst->compunit_symtab = cust;
1536 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1537 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1538 *(SYMBOL2) = *(SYMBOL1);
1541 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1542 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1546 /* process one xcoff symbol. */
1548 static struct symbol *
1549 process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
1551 struct symbol onesymbol;
1552 struct symbol *sym = &onesymbol;
1553 struct symbol *sym2 = NULL;
1559 if (cs->c_secnum < 0)
1561 /* The value is a register number, offset within a frame, etc.,
1562 and does not get relocated. */
1568 sec = secnum_to_section (cs->c_secnum, objfile);
1569 off = ANOFFSET (objfile->section_offsets, sec);
1576 initialize_objfile_symbol (sym);
1578 /* default assumptions */
1579 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1580 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1581 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1583 if (ISFCN (cs->c_type))
1585 /* At this point, we don't know the type of the function. This
1586 will be patched with the type from its stab entry later on in
1587 patch_block_stabs (), unless the file was compiled without -g. */
1589 SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced));
1590 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1592 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1593 SYMBOL_DUP (sym, sym2);
1595 if (cs->c_sclass == C_EXT || C_WEAKEXT)
1596 add_symbol_to_list (sym2, get_global_symbols ());
1597 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1598 add_symbol_to_list (sym2, get_file_symbols ());
1602 /* In case we can't figure out the type, provide default. */
1603 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1605 switch (cs->c_sclass)
1608 /* The values of functions and global symbols are now resolved
1609 via the global_sym_chain in stabsread.c. */
1611 if (fcn_cs_saved.c_sclass == C_EXT)
1612 add_stab_to_list (name, &global_stabs);
1614 add_stab_to_list (name, &file_stabs);
1618 add_stab_to_list (name, &global_stabs);
1623 common_block_start (cs->c_name, objfile);
1627 common_block_end (objfile);
1631 complaint (_("Unexpected storage class: %d"),
1644 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1647 SYMBOL_SECTION (sym) = sec;
1654 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1655 all statics and we need to distinguish file-scope versus
1656 function-scope using within_function. We do this by
1657 changing the string we pass to define_symbol to use 'S'
1658 where we need to, which is not necessarily super-clean,
1659 but seems workable enough. */
1664 pp = strchr (name, ':');
1669 if (*pp == 'V' && !within_function)
1671 sym = define_symbol ((cs->c_value
1672 + ANOFFSET (objfile->section_offsets,
1673 static_block_section)),
1674 cs->c_name, 0, 0, objfile);
1677 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1678 SYMBOL_SECTION (sym) = static_block_section;
1687 /* Extract the file name from the aux entry of a C_FILE symbol.
1688 Result is in static storage and is only good for temporary use. */
1691 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1693 static char buffer[BUFSIZ];
1695 if (aux_entry->x_file.x_n.x_zeroes == 0)
1696 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1697 + aux_entry->x_file.x_n.x_offset));
1700 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1701 buffer[FILNMLEN] = '\0';
1706 /* Set *SYMBOL to symbol number symno in symtbl. */
1708 read_symbol (struct internal_syment *symbol, int symno)
1710 struct xcoff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1711 int nsyms = xcoff->symtbl_num_syms;
1712 char *stbl = xcoff->symtbl;
1714 if (symno < 0 || symno >= nsyms)
1716 complaint (_("Invalid symbol offset"));
1717 symbol->n_value = 0;
1718 symbol->n_scnum = -1;
1721 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1722 stbl + (symno * local_symesz),
1726 /* Get value corresponding to symbol number symno in symtbl. */
1729 read_symbol_nvalue (int symno)
1731 struct internal_syment symbol[1];
1733 read_symbol (symbol, symno);
1734 return symbol->n_value;
1738 /* Find the address of the function corresponding to symno, where
1739 symno is the symbol pointed to by the linetable. */
1742 read_symbol_lineno (int symno)
1744 struct objfile *objfile = this_symtab_objfile;
1745 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1747 struct xcoff_symfile_info *info = XCOFF_DATA (objfile);
1748 int nsyms = info->symtbl_num_syms;
1749 char *stbl = info->symtbl;
1750 char *strtbl = info->strtbl;
1752 struct internal_syment symbol[1];
1753 union internal_auxent main_aux[1];
1757 bf_notfound_complaint ();
1761 /* Note that just searching for a short distance (e.g. 50 symbols)
1762 is not enough, at least in the following case.
1765 [many .stabx entries]
1766 [a few functions, referring to foo]
1770 What happens here is that the assembler moves the .stabx entries
1771 to right before the ".bf" for foo, but the symbol for "foo" is before
1772 all the stabx entries. See PR gdb/2222. */
1774 /* Maintaining a table of .bf entries might be preferable to this search.
1775 If I understand things correctly it would need to be done only for
1776 the duration of a single psymtab to symtab conversion. */
1777 while (symno < nsyms)
1779 bfd_coff_swap_sym_in (symfile_bfd,
1780 stbl + (symno * local_symesz), symbol);
1781 if (symbol->n_sclass == C_FCN)
1783 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1785 if (strcmp (name, ".bf") == 0)
1788 symno += symbol->n_numaux + 1;
1791 bf_notfound_complaint ();
1795 /* Take aux entry and return its lineno. */
1797 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1798 symbol->n_type, symbol->n_sclass,
1799 0, symbol->n_numaux, main_aux);
1801 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1804 /* Support for line number handling. */
1806 /* This function is called for every section; it finds the outer limits
1807 * of the line table (minimum and maximum file offset) so that the
1808 * mainline code can read the whole thing for efficiency.
1811 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1813 struct xcoff_symfile_info *info;
1815 file_ptr offset, maxoff;
1817 count = asect->lineno_count;
1819 if (strcmp (asect->name, ".text") != 0 || count == 0)
1822 size = count * coff_data (abfd)->local_linesz;
1823 info = (struct xcoff_symfile_info *) vpinfo;
1824 offset = asect->line_filepos;
1825 maxoff = offset + size;
1827 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1828 info->min_lineno_offset = offset;
1830 if (maxoff > info->max_lineno_offset)
1831 info->max_lineno_offset = maxoff;
1835 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1845 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1850 /* Read in all partial symtabs on which this one is dependent. */
1851 for (i = 0; i < pst->number_of_dependencies; i++)
1852 if (!pst->dependencies[i]->readin)
1854 /* Inform about additional files that need to be read in. */
1857 fputs_filtered (" ", gdb_stdout);
1859 fputs_filtered ("and ", gdb_stdout);
1861 printf_filtered ("%s...", pst->dependencies[i]->filename);
1862 wrap_here (""); /* Flush output */
1863 gdb_flush (gdb_stdout);
1865 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1868 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1870 /* Init stuff necessary for reading in symbols. */
1873 scoped_free_pendings free_pending;
1874 read_xcoff_symtab (objfile, pst);
1880 /* Read in all of the symbols for a given psymtab for real.
1881 Be verbose about it if the user wants that. SELF is not NULL. */
1884 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1889 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1894 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1895 || self->number_of_dependencies)
1897 /* Print the message now, before reading the string table,
1898 to avoid disconcerting pauses. */
1901 printf_filtered ("Reading in symbols for %s...", self->filename);
1902 gdb_flush (gdb_stdout);
1905 next_symbol_text_func = xcoff_next_symbol_text;
1907 xcoff_psymtab_to_symtab_1 (objfile, self);
1909 /* Match with global symbols. This only needs to be done once,
1910 after all of the symtabs and dependencies have been read in. */
1911 scan_file_globals (objfile);
1913 /* Finish up the debug error message. */
1915 printf_filtered ("done.\n");
1920 xcoff_new_init (struct objfile *objfile)
1922 stabsread_new_init ();
1925 /* Do initialization in preparation for reading symbols from OBJFILE.
1927 We will only be called if this is an XCOFF or XCOFF-like file.
1928 BFD handles figuring out the format of the file, and code in symfile.c
1929 uses BFD's determination to vector to us. */
1932 xcoff_symfile_init (struct objfile *objfile)
1934 /* Allocate struct to keep track of the symfile. */
1935 xcoff_objfile_data_key.emplace (objfile);
1937 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1938 find this causes a significant slowdown in gdb then we could
1939 set it in the debug symbol readers only when necessary. */
1940 objfile->flags |= OBJF_REORDERED;
1943 /* Perform any local cleanups required when we are done with a particular
1944 objfile. I.E, we are in the process of discarding all symbol information
1945 for an objfile, freeing up all memory held for it, and unlinking the
1946 objfile struct from the global list of known objfiles. */
1949 xcoff_symfile_finish (struct objfile *objfile)
1951 /* Start with a fresh include table for the next objfile. */
1957 inclIndx = inclLength = inclDepth = 0;
1962 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1966 unsigned char lengthbuf[4];
1968 struct xcoff_symfile_info *xcoff = XCOFF_DATA (objfile);
1970 xcoff->strtbl = NULL;
1972 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1973 error (_("cannot seek to string table in %s: %s"),
1974 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1976 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1977 length = bfd_h_get_32 (abfd, lengthbuf);
1979 /* If no string table is needed, then the file may end immediately
1980 after the symbols. Just return with `strtbl' set to NULL. */
1982 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1985 /* Allocate string table from objfile_obstack. We will need this table
1986 as long as we have its symbol table around. */
1988 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1989 xcoff->strtbl = strtbl;
1991 /* Copy length buffer, the first byte is usually zero and is
1992 used for stabs with a name length of zero. */
1993 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1994 if (length == sizeof lengthbuf)
1997 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
1999 if (val != length - sizeof lengthbuf)
2000 error (_("cannot read string table from %s: %s"),
2001 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
2002 if (strtbl[length - 1] != '\0')
2003 error (_("bad symbol file: string table "
2004 "does not end with null character"));
2009 /* If we have not yet seen a function for this psymtab, this is 0. If we
2010 have seen one, it is the offset in the line numbers of the line numbers
2012 static unsigned int first_fun_line_offset;
2014 /* Allocate and partially fill a partial symtab. It will be
2015 completely filled at the end of the symbol list.
2017 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2018 is the address relative to which its symbols are (incremental) or 0
2021 static struct partial_symtab *
2022 xcoff_start_psymtab (struct objfile *objfile,
2023 const char *filename, int first_symnum)
2025 struct partial_symtab *result =
2026 start_psymtab_common (objfile,
2028 /* We fill in textlow later. */
2031 result->read_symtab_private =
2032 XOBNEW (&objfile->objfile_obstack, 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;
2067 end_psymtab_common (objfile, pst);
2069 pst->number_of_dependencies = number_dependencies;
2070 if (number_dependencies)
2073 = objfile->partial_symtabs->allocate_dependencies (number_dependencies);
2074 memcpy (pst->dependencies, dependency_list,
2075 number_dependencies * sizeof (struct partial_symtab *));
2078 pst->dependencies = 0;
2080 for (i = 0; i < num_includes; i++)
2082 struct partial_symtab *subpst =
2083 allocate_psymtab (include_list[i], objfile);
2085 subpst->read_symtab_private = XOBNEW (&objfile->objfile_obstack, symloc);
2086 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2087 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2089 /* We could save slight bits of space by only making one of these,
2090 shared by the entire set of include files. FIXME-someday. */
2091 subpst->dependencies =
2092 objfile->partial_symtabs->allocate_dependencies (1);
2093 subpst->dependencies[0] = pst;
2094 subpst->number_of_dependencies = 1;
2096 subpst->read_symtab = pst->read_symtab;
2099 if (num_includes == 0
2100 && number_dependencies == 0
2101 && pst->n_global_syms == 0
2102 && pst->n_static_syms == 0)
2104 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2105 it is on the obstack, but we can forget to chain it on the list. */
2106 /* Empty psymtabs happen as a result of header files which don't have
2107 any symbols in them. There can be a lot of them. */
2109 discard_psymtab (objfile, pst);
2111 /* Indicate that psymtab was thrown away. */
2117 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2118 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2119 the symbol and its auxents. */
2122 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2123 const char **name, char **raw, unsigned int *symnump,
2124 struct objfile *objfile)
2126 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2127 if (symbol->n_zeroes)
2129 /* If it's exactly E_SYMNMLEN characters long it isn't
2131 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2133 /* FIXME: wastes memory for symbols which we don't end up putting
2134 into the minimal symbols. */
2137 p = (char *) obstack_alloc (&objfile->objfile_obstack,
2139 strncpy (p, symbol->n_name, E_SYMNMLEN);
2140 p[E_SYMNMLEN] = '\0';
2144 /* Point to the unswapped name as that persists as long as the
2146 *name = ((struct external_syment *) *raw)->e.e_name;
2148 else if (symbol->n_sclass & 0x80)
2150 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2154 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2157 *raw += coff_data (objfile->obfd)->local_symesz;
2158 if (symbol->n_numaux > 0)
2160 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2161 symbol->n_sclass, 0, symbol->n_numaux, aux);
2163 *symnump += symbol->n_numaux;
2164 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2169 function_outside_compilation_unit_complaint (const char *arg1)
2171 complaint (_("function `%s' appears to be defined "
2172 "outside of all compilation units"),
2177 scan_xcoff_symtab (minimal_symbol_reader &reader,
2178 struct objfile *objfile)
2180 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2181 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2182 const char *filestring = NULL;
2184 const char *namestring;
2189 /* Current partial symtab */
2190 struct partial_symtab *pst;
2192 /* List of current psymtab's include files. */
2193 const char **psymtab_include_list;
2194 int includes_allocated;
2197 /* Index within current psymtab dependency list. */
2198 struct partial_symtab **dependency_list;
2199 int dependencies_used, dependencies_allocated;
2202 struct internal_syment symbol;
2203 union internal_auxent main_aux[5];
2204 unsigned int ssymnum;
2206 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2207 CORE_ADDR last_csect_val = 0;
2208 int last_csect_sec = 0;
2209 int misc_func_recorded = 0; /* true if any misc. function. */
2210 int textlow_not_set = 1;
2212 pst = (struct partial_symtab *) 0;
2214 includes_allocated = 30;
2216 psymtab_include_list = (const char **) alloca (includes_allocated *
2217 sizeof (const char *));
2219 dependencies_allocated = 30;
2220 dependencies_used = 0;
2222 (struct partial_symtab **) alloca (dependencies_allocated *
2223 sizeof (struct partial_symtab *));
2225 set_last_source_file (NULL);
2227 abfd = objfile->obfd;
2228 next_symbol_text_func = xcoff_next_symbol_text;
2230 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2231 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2233 while (ssymnum < nsyms)
2239 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2240 sclass = symbol.n_sclass;
2248 /* The CSECT auxent--always the last auxent. */
2249 union internal_auxent csect_aux;
2250 unsigned int symnum_before = ssymnum;
2252 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2254 if (symbol.n_numaux > 1)
2256 bfd_coff_swap_aux_in
2258 sraw_symbol - coff_data (abfd)->local_symesz,
2261 symbol.n_numaux - 1,
2266 csect_aux = main_aux[0];
2268 /* If symbol name starts with ".$" or "$", ignore it. */
2269 if (namestring[0] == '$'
2270 || (namestring[0] == '.' && namestring[1] == '$'))
2273 switch (csect_aux.x_csect.x_smtyp & 0x7)
2276 switch (csect_aux.x_csect.x_smclas)
2279 if (last_csect_name)
2281 /* If no misc. function recorded in the last
2282 seen csect, enter it as a function. This
2283 will take care of functions like strcmp()
2286 if (!misc_func_recorded)
2288 record_minimal_symbol
2289 (reader, last_csect_name, last_csect_val,
2290 mst_text, last_csect_sec, objfile);
2291 misc_func_recorded = 1;
2296 /* We have to allocate one psymtab for
2297 each program csect, because their text
2298 sections need not be adjacent. */
2300 (objfile, pst, psymtab_include_list,
2301 includes_used, symnum_before, dependency_list,
2302 dependencies_used, textlow_not_set);
2304 dependencies_used = 0;
2305 /* Give all psymtabs for this source file the same
2307 pst = xcoff_start_psymtab
2313 /* Activate the misc_func_recorded mechanism for
2314 compiler- and linker-generated CSECTs like ".strcmp"
2316 if (namestring && (namestring[0] == '.'
2317 || namestring[0] == '@'))
2319 last_csect_name = namestring;
2320 last_csect_val = symbol.n_value;
2321 last_csect_sec = symbol.n_scnum;
2326 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2328 if (highval > pst->raw_text_high ())
2329 pst->set_text_high (highval);
2330 if (!pst->text_low_valid
2331 || symbol.n_value < pst->raw_text_low ())
2332 pst->set_text_low (symbol.n_value);
2334 misc_func_recorded = 0;
2339 /* Data variables are recorded in the minimal symbol
2340 table, except for section symbols. */
2341 if (*namestring != '.')
2342 record_minimal_symbol
2343 (reader, namestring, symbol.n_value,
2344 sclass == C_HIDEXT ? mst_file_data : mst_data,
2345 symbol.n_scnum, objfile);
2350 warning (_("More than one XMC_TC0 symbol found."));
2351 toc_offset = symbol.n_value;
2353 /* Make TOC offset relative to start address of
2355 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2357 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2361 /* These symbols tell us where the TOC entry for a
2362 variable is, not the variable itself. */
2371 switch (csect_aux.x_csect.x_smclas)
2374 /* A function entry point. */
2376 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2377 first_fun_line_offset =
2378 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2380 record_minimal_symbol
2381 (reader, namestring, symbol.n_value,
2382 sclass == C_HIDEXT ? mst_file_text : mst_text,
2383 symbol.n_scnum, objfile);
2384 misc_func_recorded = 1;
2388 /* shared library function trampoline code entry
2391 /* record trampoline code entries as
2392 mst_solib_trampoline symbol. When we lookup mst
2393 symbols, we will choose mst_text over
2394 mst_solib_trampoline. */
2395 record_minimal_symbol
2396 (reader, namestring, symbol.n_value,
2397 mst_solib_trampoline, symbol.n_scnum, objfile);
2398 misc_func_recorded = 1;
2402 /* The symbols often have the same names as
2403 debug symbols for functions, and confuse
2409 /* xlc puts each variable in a separate csect,
2410 so we get an XTY_SD for each variable. But
2411 gcc puts several variables in a csect, so
2412 that each variable only gets an XTY_LD. We
2413 still need to record them. This will
2414 typically be XMC_RW; I suspect XMC_RO and
2415 XMC_BS might be possible too. */
2416 if (*namestring != '.')
2417 record_minimal_symbol
2418 (reader, namestring, symbol.n_value,
2419 sclass == C_HIDEXT ? mst_file_data : mst_data,
2420 symbol.n_scnum, objfile);
2426 switch (csect_aux.x_csect.x_smclas)
2430 /* Common variables are recorded in the minimal symbol
2431 table, except for section symbols. */
2432 if (*namestring != '.')
2433 record_minimal_symbol
2434 (reader, namestring, symbol.n_value,
2435 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2436 symbol.n_scnum, objfile);
2448 unsigned int symnum_before;
2450 symnum_before = ssymnum;
2451 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2454 /* See if the last csect needs to be recorded. */
2456 if (last_csect_name && !misc_func_recorded)
2458 /* If no misc. function recorded in the last seen csect, enter
2459 it as a function. This will take care of functions like
2460 strcmp() compiled by xlc. */
2462 record_minimal_symbol (reader, last_csect_name, last_csect_val,
2463 mst_text, last_csect_sec, objfile);
2464 misc_func_recorded = 1;
2469 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2470 includes_used, symnum_before,
2471 dependency_list, dependencies_used,
2474 dependencies_used = 0;
2476 first_fun_line_offset = 0;
2478 /* XCOFF, according to the AIX 3.2 documentation, puts the
2479 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2480 do things the standard COFF way and put it in the auxent.
2481 We use the auxent if the symbol is ".file" and an auxent
2482 exists, otherwise use the symbol itself. */
2483 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2485 filestring = coff_getfilename (&main_aux[0], objfile);
2488 filestring = namestring;
2490 pst = xcoff_start_psymtab (objfile,
2493 last_csect_name = NULL;
2499 complaint (_("Storage class %d not recognized during scan"),
2505 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2506 to handle only the C_FUN and C_EXT. */
2520 /* C_EINCL means we are switching back to the main file. But there
2521 is no reason to care; the only thing we want to know about
2522 includes is the names of all the included (.h) files. */
2527 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2531 /* I don't think the name of the common block (as opposed to the
2532 variables within it) is something which is user visible
2540 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2541 so C_LSYM would appear to be only for locals. */
2547 /* We probably could save a few instructions by assuming that
2548 C_LSYM, C_PSYM, etc., never have auxents. */
2549 int naux1 = symbol.n_numaux + 1;
2552 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2558 /* Mark down an include file in the current psymtab. */
2559 enum language tmp_language;
2561 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2564 tmp_language = deduce_language_from_filename (namestring);
2566 /* Only change the psymtab's language if we've learned
2567 something useful (eg. tmp_language is not language_unknown).
2568 In addition, to match what start_subfile does, never change
2570 if (tmp_language != language_unknown
2571 && (tmp_language != language_c
2572 || psymtab_language != language_cplus))
2573 psymtab_language = tmp_language;
2575 /* In C++, one may expect the same filename to come round many
2576 times, when code is coming alternately from the main file
2577 and from inline functions in other files. So I check to see
2578 if this is a file we've seen before -- either the main
2579 source file, or a previously included file.
2581 This seems to be a lot of time to be spending on N_SOL, but
2582 things like "break c-exp.y:435" need to work (I
2583 suppose the psymtab_include_list could be hashed or put
2584 in a binary tree, if profiling shows this is a major hog). */
2585 if (pst && strcmp (namestring, pst->filename) == 0)
2591 for (i = 0; i < includes_used; i++)
2592 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2600 psymtab_include_list[includes_used++] = namestring;
2601 if (includes_used >= includes_allocated)
2603 const char **orig = psymtab_include_list;
2605 psymtab_include_list = (const char **)
2606 alloca ((includes_allocated *= 2) *
2607 sizeof (const char *));
2608 memcpy (psymtab_include_list, orig,
2609 includes_used * sizeof (const char *));
2614 /* The value of the C_FUN is not the address of the function (it
2615 appears to be the address before linking), but as long as it
2616 is smaller than the actual address, then find_pc_partial_function
2617 will use the minimal symbols instead. I hope. */
2626 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2629 p = strchr (namestring, ':');
2631 continue; /* Not a debugging symbol. */
2633 /* Main processing section for debugging symbols which
2634 the initial read through the symbol tables needs to worry
2635 about. If we reach this point, the symbol which we are
2636 considering is definitely one we are interested in.
2637 p must also contain the (valid) index into the namestring
2638 which indicates the debugging type symbol. */
2643 if (gdbarch_static_transform_name_p (gdbarch))
2644 namestring = gdbarch_static_transform_name
2645 (gdbarch, namestring);
2647 add_psymbol_to_list (namestring, p - namestring, 1,
2648 VAR_DOMAIN, LOC_STATIC,
2649 SECT_OFF_DATA (objfile),
2650 psymbol_placement::STATIC,
2652 psymtab_language, objfile);
2656 /* The addresses in these entries are reported to be
2657 wrong. See the code that reads 'G's for symtabs. */
2658 add_psymbol_to_list (namestring, p - namestring, 1,
2659 VAR_DOMAIN, LOC_STATIC,
2660 SECT_OFF_DATA (objfile),
2661 psymbol_placement::GLOBAL,
2663 psymtab_language, objfile);
2667 /* When a 'T' entry is defining an anonymous enum, it
2668 may have a name which is the empty string, or a
2669 single space. Since they're not really defining a
2670 symbol, those shouldn't go in the partial symbol
2671 table. We do pick up the elements of such enums at
2672 'check_enum:', below. */
2673 if (p >= namestring + 2
2674 || (p == namestring + 1
2675 && namestring[0] != ' '))
2677 add_psymbol_to_list (namestring, p - namestring, 1,
2678 STRUCT_DOMAIN, LOC_TYPEDEF, -1,
2679 psymbol_placement::STATIC,
2680 0, psymtab_language, objfile);
2683 /* Also a typedef with the same name. */
2684 add_psymbol_to_list (namestring, p - namestring, 1,
2685 VAR_DOMAIN, LOC_TYPEDEF, -1,
2686 psymbol_placement::STATIC,
2687 0, psymtab_language, objfile);
2694 if (p != namestring) /* a name is there, not just :T... */
2696 add_psymbol_to_list (namestring, p - namestring, 1,
2697 VAR_DOMAIN, LOC_TYPEDEF, -1,
2698 psymbol_placement::STATIC,
2699 0, psymtab_language, objfile);
2702 /* If this is an enumerated type, we need to
2703 add all the enum constants to the partial symbol
2704 table. This does not cover enums without names, e.g.
2705 "enum {a, b} c;" in C, but fortunately those are
2706 rare. There is no way for GDB to find those from the
2707 enum type without spending too much time on it. Thus
2708 to solve this problem, the compiler needs to put out the
2709 enum in a nameless type. GCC2 does this. */
2711 /* We are looking for something of the form
2712 <name> ":" ("t" | "T") [<number> "="] "e"
2713 {<constant> ":" <value> ","} ";". */
2715 /* Skip over the colon and the 't' or 'T'. */
2717 /* This type may be given a number. Also, numbers can come
2718 in pairs like (0,26). Skip over it. */
2719 while ((*p >= '0' && *p <= '9')
2720 || *p == '(' || *p == ',' || *p == ')'
2726 /* The aix4 compiler emits extra crud before the
2730 /* Skip over the type (?). */
2734 /* Skip over the colon. */
2738 /* We have found an enumerated type. */
2739 /* According to comments in read_enum_type
2740 a comma could end it instead of a semicolon.
2741 I don't know where that happens.
2743 while (*p && *p != ';' && *p != ',')
2747 /* Check for and handle cretinous dbx symbol name
2749 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2750 p = next_symbol_text (objfile);
2752 /* Point to the character after the name
2753 of the enum constant. */
2754 for (q = p; *q && *q != ':'; q++)
2756 /* Note that the value doesn't matter for
2757 enum constants in psymtabs, just in symtabs. */
2758 add_psymbol_to_list (p, q - p, 1,
2759 VAR_DOMAIN, LOC_CONST, -1,
2760 psymbol_placement::STATIC,
2761 0, psymtab_language, objfile);
2762 /* Point past the name. */
2764 /* Skip over the value. */
2765 while (*p && *p != ',')
2767 /* Advance past the comma. */
2775 /* Constant, e.g. from "const" in Pascal. */
2776 add_psymbol_to_list (namestring, p - namestring, 1,
2777 VAR_DOMAIN, LOC_CONST, -1,
2778 psymbol_placement::STATIC,
2779 0, psymtab_language, objfile);
2785 int name_len = p - namestring;
2786 char *name = (char *) xmalloc (name_len + 1);
2788 memcpy (name, namestring, name_len);
2789 name[name_len] = '\0';
2790 function_outside_compilation_unit_complaint (name);
2793 add_psymbol_to_list (namestring, p - namestring, 1,
2794 VAR_DOMAIN, LOC_BLOCK,
2795 SECT_OFF_TEXT (objfile),
2796 psymbol_placement::STATIC,
2798 psymtab_language, objfile);
2801 /* Global functions were ignored here, but now they
2802 are put into the global psymtab like one would expect.
2803 They're also in the minimal symbol table. */
2807 int name_len = p - namestring;
2808 char *name = (char *) xmalloc (name_len + 1);
2810 memcpy (name, namestring, name_len);
2811 name[name_len] = '\0';
2812 function_outside_compilation_unit_complaint (name);
2816 /* We need only the minimal symbols for these
2817 loader-generated definitions. Keeping the global
2818 symbols leads to "in psymbols but not in symbols"
2820 if (startswith (namestring, "@FIX"))
2823 add_psymbol_to_list (namestring, p - namestring, 1,
2824 VAR_DOMAIN, LOC_BLOCK,
2825 SECT_OFF_TEXT (objfile),
2826 psymbol_placement::GLOBAL,
2828 psymtab_language, objfile);
2831 /* Two things show up here (hopefully); static symbols of
2832 local scope (static used inside braces) or extensions
2833 of structure symbols. We can ignore both. */
2847 case '#': /* For symbol identification (used in
2852 /* It is a C++ nested symbol. We don't need to record it
2853 (I don't think); if we try to look up foo::bar::baz,
2854 then symbols for the symtab containing foo should get
2855 read in, I think. */
2856 /* Someone says sun cc puts out symbols like
2857 /foo/baz/maclib::/usr/local/bin/maclib,
2858 which would get here with a symbol type of ':'. */
2862 /* Unexpected symbol descriptor. The second and
2863 subsequent stabs of a continued stab can show up
2864 here. The question is whether they ever can mimic
2865 a normal stab--it would be nice if not, since we
2866 certainly don't want to spend the time searching to
2867 the end of every string looking for a
2870 complaint (_("unknown symbol descriptor `%c'"), p[1]);
2872 /* Ignore it; perhaps it is an extension that we don't
2882 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2883 ssymnum, dependency_list,
2884 dependencies_used, textlow_not_set);
2887 /* Record the toc offset value of this symbol table into objfile
2888 structure. If no XMC_TC0 is found, toc_offset should be zero.
2889 Another place to obtain this information would be file auxiliary
2892 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2895 /* Return the toc offset value for a given objfile. */
2898 xcoff_get_toc_offset (struct objfile *objfile)
2901 return XCOFF_DATA (objfile)->toc_offset;
2905 /* Scan and build partial symbols for a symbol file.
2906 We have been initialized by a call to dbx_symfile_init, which
2907 put all the relevant info into a "struct dbx_symfile_info",
2908 hung off the objfile structure.
2910 SECTION_OFFSETS contains offsets relative to which the symbols in the
2911 various sections are (depending where the sections were actually
2915 xcoff_initial_scan (struct objfile *objfile, symfile_add_flags symfile_flags)
2919 int num_symbols; /* # of symbols */
2920 file_ptr symtab_offset; /* symbol table and */
2921 file_ptr stringtab_offset; /* string table file offsets */
2922 struct xcoff_symfile_info *info;
2926 info = XCOFF_DATA (objfile);
2927 symfile_bfd = abfd = objfile->obfd;
2928 name = objfile_name (objfile);
2930 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2931 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2932 stringtab_offset = symtab_offset +
2933 num_symbols * coff_data (abfd)->local_symesz;
2935 info->min_lineno_offset = 0;
2936 info->max_lineno_offset = 0;
2937 bfd_map_over_sections (abfd, find_linenos, info);
2939 if (num_symbols > 0)
2941 /* Read the string table. */
2942 init_stringtab (abfd, stringtab_offset, objfile);
2944 /* Read the .debug section, if present and if we're not ignoring
2946 if (!(objfile->flags & OBJF_READNEVER))
2948 struct bfd_section *secp;
2949 bfd_size_type length;
2950 bfd_byte *debugsec = NULL;
2952 secp = bfd_get_section_by_name (abfd, ".debug");
2955 length = bfd_section_size (abfd, secp);
2959 = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
2962 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2964 error (_("Error reading .debug section of `%s': %s"),
2965 name, bfd_errmsg (bfd_get_error ()));
2969 info->debugsec = (char *) debugsec;
2973 /* Read the symbols. We keep them in core because we will want to
2974 access them randomly in read_symbol*. */
2975 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2977 error (_("Error reading symbols from %s: %s"),
2978 name, bfd_errmsg (bfd_get_error ()));
2979 size = coff_data (abfd)->local_symesz * num_symbols;
2980 info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size);
2981 info->symtbl_num_syms = num_symbols;
2983 val = bfd_bread (info->symtbl, size, abfd);
2985 perror_with_name (_("reading symbol table"));
2987 /* I'm not sure how how good num_symbols is; the rule of thumb in
2988 init_psymbol_list was developed for a.out. On the one hand,
2989 num_symbols includes auxents. On the other hand, it doesn't
2991 init_psymbol_list (objfile, num_symbols);
2993 scoped_free_pendings free_pending;
2994 minimal_symbol_reader reader (objfile);
2996 /* Now that the symbol table data of the executable file are all in core,
2997 process them and define symbols accordingly. */
2999 scan_xcoff_symtab (reader, objfile);
3001 /* Install any minimal symbols that have been collected as the current
3002 minimal symbols for this objfile. */
3006 /* DWARF2 sections. */
3008 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3009 dwarf2_build_psymtabs (objfile);
3011 dwarf2_build_frame_info (objfile);
3015 xcoff_symfile_offsets (struct objfile *objfile,
3016 const section_addr_info &addrs)
3018 const char *first_section_name;
3020 default_symfile_offsets (objfile, addrs);
3022 /* Oneof the weird side-effects of default_symfile_offsets is that
3023 it sometimes sets some section indices to zero for sections that,
3024 in fact do not exist. See the body of default_symfile_offsets
3025 for more info on when that happens. Undo that, as this then allows
3026 us to test whether the associated section exists or not, and then
3027 access it quickly (without searching it again). */
3029 if (objfile->num_sections == 0)
3030 return; /* Is that even possible? Better safe than sorry. */
3033 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3035 if (objfile->sect_index_text == 0
3036 && strcmp (first_section_name, ".text") != 0)
3037 objfile->sect_index_text = -1;
3039 if (objfile->sect_index_data == 0
3040 && strcmp (first_section_name, ".data") != 0)
3041 objfile->sect_index_data = -1;
3043 if (objfile->sect_index_bss == 0
3044 && strcmp (first_section_name, ".bss") != 0)
3045 objfile->sect_index_bss = -1;
3047 if (objfile->sect_index_rodata == 0
3048 && strcmp (first_section_name, ".rodata") != 0)
3049 objfile->sect_index_rodata = -1;
3052 /* Register our ability to parse symbols for xcoff BFD files. */
3054 static const struct sym_fns xcoff_sym_fns =
3057 /* It is possible that coff and xcoff should be merged as
3058 they do have fundamental similarities (for example, the extra storage
3059 classes used for stabs could presumably be recognized in any COFF file).
3060 However, in addition to obvious things like all the csect hair, there are
3061 some subtler differences between xcoffread.c and coffread.c, notably
3062 the fact that coffread.c has no need to read in all the symbols, but
3063 xcoffread.c reads all the symbols and does in fact randomly access them
3064 (in C_BSTAT and line number processing). */
3066 xcoff_new_init, /* init anything gbl to entire symtab */
3067 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3068 xcoff_initial_scan, /* read a symbol file into symtab */
3069 NULL, /* sym_read_psymbols */
3070 xcoff_symfile_finish, /* finished with file, cleanup */
3071 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3072 default_symfile_segments, /* Get segment information from a file. */
3073 aix_process_linenos,
3074 default_symfile_relocate, /* Relocate a debug section. */
3075 NULL, /* sym_probe_fns */
3079 /* Same as xcoff_get_n_import_files, but for core files. */
3082 xcoff_get_core_n_import_files (bfd *abfd)
3084 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3086 file_ptr offset = 0;
3090 return -1; /* Not a core file. */
3092 for (offset = 0; offset < bfd_get_section_size (sect);)
3098 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3100 next = bfd_get_32 (abfd, buf);
3102 break; /* This is the last entry. */
3106 /* Return the number of entries, excluding the first one, which is
3107 the path to the executable that produced this core file. */
3108 return n_entries - 1;
3111 /* Return the number of import files (shared libraries) that the given
3112 BFD depends on. Return -1 if this number could not be computed. */
3115 xcoff_get_n_import_files (bfd *abfd)
3117 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3121 /* If the ".loader" section does not exist, the objfile is probably
3122 not an executable. Might be a core file... */
3124 return xcoff_get_core_n_import_files (abfd);
3126 /* The number of entries in the Import Files Table is stored in
3127 field l_nimpid. This field is always at offset 16, and is
3128 always 4 bytes long. Read those 4 bytes. */
3130 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3132 l_nimpid = bfd_get_32 (abfd, buf);
3134 /* By convention, the first entry is the default LIBPATH value
3135 to be used by the system loader, so it does not count towards
3136 the number of import files. */
3137 return l_nimpid - 1;
3141 _initialize_xcoffread (void)
3143 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);