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_copy0 (&objfile->objfile_obstack, \
1543 (NAME), strlen (NAME)))
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, ((const char *)
1590 SYMNAME_ALLOC (name, symname_alloced)));
1591 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
1593 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1594 SYMBOL_DUP (sym, sym2);
1596 if (cs->c_sclass == C_EXT || C_WEAKEXT)
1597 add_symbol_to_list (sym2, get_global_symbols ());
1598 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1599 add_symbol_to_list (sym2, get_file_symbols ());
1603 /* In case we can't figure out the type, provide default. */
1604 SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
1606 switch (cs->c_sclass)
1609 /* The values of functions and global symbols are now resolved
1610 via the global_sym_chain in stabsread.c. */
1612 if (fcn_cs_saved.c_sclass == C_EXT)
1613 add_stab_to_list (name, &global_stabs);
1615 add_stab_to_list (name, &file_stabs);
1619 add_stab_to_list (name, &global_stabs);
1624 common_block_start (cs->c_name, objfile);
1628 common_block_end (objfile);
1632 complaint (_("Unexpected storage class: %d"),
1645 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1648 SYMBOL_SECTION (sym) = sec;
1655 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1656 all statics and we need to distinguish file-scope versus
1657 function-scope using within_function. We do this by
1658 changing the string we pass to define_symbol to use 'S'
1659 where we need to, which is not necessarily super-clean,
1660 but seems workable enough. */
1665 pp = strchr (name, ':');
1670 if (*pp == 'V' && !within_function)
1672 sym = define_symbol ((cs->c_value
1673 + ANOFFSET (objfile->section_offsets,
1674 static_block_section)),
1675 cs->c_name, 0, 0, objfile);
1678 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1679 SYMBOL_SECTION (sym) = static_block_section;
1688 /* Extract the file name from the aux entry of a C_FILE symbol.
1689 Result is in static storage and is only good for temporary use. */
1692 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1694 static char buffer[BUFSIZ];
1696 if (aux_entry->x_file.x_n.x_zeroes == 0)
1697 strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
1698 + aux_entry->x_file.x_n.x_offset));
1701 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1702 buffer[FILNMLEN] = '\0';
1707 /* Set *SYMBOL to symbol number symno in symtbl. */
1709 read_symbol (struct internal_syment *symbol, int symno)
1711 struct xcoff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
1712 int nsyms = xcoff->symtbl_num_syms;
1713 char *stbl = xcoff->symtbl;
1715 if (symno < 0 || symno >= nsyms)
1717 complaint (_("Invalid symbol offset"));
1718 symbol->n_value = 0;
1719 symbol->n_scnum = -1;
1722 bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
1723 stbl + (symno * local_symesz),
1727 /* Get value corresponding to symbol number symno in symtbl. */
1730 read_symbol_nvalue (int symno)
1732 struct internal_syment symbol[1];
1734 read_symbol (symbol, symno);
1735 return symbol->n_value;
1739 /* Find the address of the function corresponding to symno, where
1740 symno is the symbol pointed to by the linetable. */
1743 read_symbol_lineno (int symno)
1745 struct objfile *objfile = this_symtab_objfile;
1746 int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
1748 struct xcoff_symfile_info *info = XCOFF_DATA (objfile);
1749 int nsyms = info->symtbl_num_syms;
1750 char *stbl = info->symtbl;
1751 char *strtbl = info->strtbl;
1753 struct internal_syment symbol[1];
1754 union internal_auxent main_aux[1];
1758 bf_notfound_complaint ();
1762 /* Note that just searching for a short distance (e.g. 50 symbols)
1763 is not enough, at least in the following case.
1766 [many .stabx entries]
1767 [a few functions, referring to foo]
1771 What happens here is that the assembler moves the .stabx entries
1772 to right before the ".bf" for foo, but the symbol for "foo" is before
1773 all the stabx entries. See PR gdb/2222. */
1775 /* Maintaining a table of .bf entries might be preferable to this search.
1776 If I understand things correctly it would need to be done only for
1777 the duration of a single psymtab to symtab conversion. */
1778 while (symno < nsyms)
1780 bfd_coff_swap_sym_in (symfile_bfd,
1781 stbl + (symno * local_symesz), symbol);
1782 if (symbol->n_sclass == C_FCN)
1784 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1786 if (strcmp (name, ".bf") == 0)
1789 symno += symbol->n_numaux + 1;
1792 bf_notfound_complaint ();
1796 /* Take aux entry and return its lineno. */
1798 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1799 symbol->n_type, symbol->n_sclass,
1800 0, symbol->n_numaux, main_aux);
1802 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1805 /* Support for line number handling. */
1807 /* This function is called for every section; it finds the outer limits
1808 * of the line table (minimum and maximum file offset) so that the
1809 * mainline code can read the whole thing for efficiency.
1812 find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
1814 struct xcoff_symfile_info *info;
1816 file_ptr offset, maxoff;
1818 count = asect->lineno_count;
1820 if (strcmp (asect->name, ".text") != 0 || count == 0)
1823 size = count * coff_data (abfd)->local_linesz;
1824 info = (struct xcoff_symfile_info *) vpinfo;
1825 offset = asect->line_filepos;
1826 maxoff = offset + size;
1828 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1829 info->min_lineno_offset = offset;
1831 if (maxoff > info->max_lineno_offset)
1832 info->max_lineno_offset = maxoff;
1836 xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
1846 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1851 /* Read in all partial symtabs on which this one is dependent. */
1852 for (i = 0; i < pst->number_of_dependencies; i++)
1853 if (!pst->dependencies[i]->readin)
1855 /* Inform about additional files that need to be read in. */
1858 fputs_filtered (" ", gdb_stdout);
1860 fputs_filtered ("and ", gdb_stdout);
1862 printf_filtered ("%s...", pst->dependencies[i]->filename);
1863 wrap_here (""); /* Flush output */
1864 gdb_flush (gdb_stdout);
1866 xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
1869 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1871 /* Init stuff necessary for reading in symbols. */
1874 scoped_free_pendings free_pending;
1875 read_xcoff_symtab (objfile, pst);
1881 /* Read in all of the symbols for a given psymtab for real.
1882 Be verbose about it if the user wants that. SELF is not NULL. */
1885 xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
1890 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1895 if (((struct symloc *) self->read_symtab_private)->numsyms != 0
1896 || self->number_of_dependencies)
1898 /* Print the message now, before reading the string table,
1899 to avoid disconcerting pauses. */
1902 printf_filtered ("Reading in symbols for %s...", self->filename);
1903 gdb_flush (gdb_stdout);
1906 next_symbol_text_func = xcoff_next_symbol_text;
1908 xcoff_psymtab_to_symtab_1 (objfile, self);
1910 /* Match with global symbols. This only needs to be done once,
1911 after all of the symtabs and dependencies have been read in. */
1912 scan_file_globals (objfile);
1914 /* Finish up the debug error message. */
1916 printf_filtered ("done.\n");
1921 xcoff_new_init (struct objfile *objfile)
1923 stabsread_new_init ();
1926 /* Do initialization in preparation for reading symbols from OBJFILE.
1928 We will only be called if this is an XCOFF or XCOFF-like file.
1929 BFD handles figuring out the format of the file, and code in symfile.c
1930 uses BFD's determination to vector to us. */
1933 xcoff_symfile_init (struct objfile *objfile)
1935 /* Allocate struct to keep track of the symfile. */
1936 xcoff_objfile_data_key.emplace (objfile);
1938 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1939 find this causes a significant slowdown in gdb then we could
1940 set it in the debug symbol readers only when necessary. */
1941 objfile->flags |= OBJF_REORDERED;
1944 /* Perform any local cleanups required when we are done with a particular
1945 objfile. I.E, we are in the process of discarding all symbol information
1946 for an objfile, freeing up all memory held for it, and unlinking the
1947 objfile struct from the global list of known objfiles. */
1950 xcoff_symfile_finish (struct objfile *objfile)
1952 /* Start with a fresh include table for the next objfile. */
1958 inclIndx = inclLength = inclDepth = 0;
1963 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1967 unsigned char lengthbuf[4];
1969 struct xcoff_symfile_info *xcoff = XCOFF_DATA (objfile);
1971 xcoff->strtbl = NULL;
1973 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1974 error (_("cannot seek to string table in %s: %s"),
1975 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1977 val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
1978 length = bfd_h_get_32 (abfd, lengthbuf);
1980 /* If no string table is needed, then the file may end immediately
1981 after the symbols. Just return with `strtbl' set to NULL. */
1983 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1986 /* Allocate string table from objfile_obstack. We will need this table
1987 as long as we have its symbol table around. */
1989 strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
1990 xcoff->strtbl = strtbl;
1992 /* Copy length buffer, the first byte is usually zero and is
1993 used for stabs with a name length of zero. */
1994 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1995 if (length == sizeof lengthbuf)
1998 val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
2000 if (val != length - sizeof lengthbuf)
2001 error (_("cannot read string table from %s: %s"),
2002 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
2003 if (strtbl[length - 1] != '\0')
2004 error (_("bad symbol file: string table "
2005 "does not end with null character"));
2010 /* If we have not yet seen a function for this psymtab, this is 0. If we
2011 have seen one, it is the offset in the line numbers of the line numbers
2013 static unsigned int first_fun_line_offset;
2015 /* Allocate and partially fill a partial symtab. It will be
2016 completely filled at the end of the symbol list.
2018 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2019 is the address relative to which its symbols are (incremental) or 0
2022 static struct partial_symtab *
2023 xcoff_start_psymtab (struct objfile *objfile,
2024 const char *filename, int first_symnum)
2026 struct partial_symtab *result =
2027 start_psymtab_common (objfile,
2029 /* We fill in textlow later. */
2032 result->read_symtab_private =
2033 XOBNEW (&objfile->objfile_obstack, struct symloc);
2034 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
2035 result->read_symtab = xcoff_read_symtab;
2037 /* Deduce the source language from the filename for this psymtab. */
2038 psymtab_language = deduce_language_from_filename (filename);
2043 /* Close off the current usage of PST.
2044 Returns PST, or NULL if the partial symtab was empty and thrown away.
2046 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2048 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2049 are the information for includes and dependencies. */
2051 static struct partial_symtab *
2052 xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
2053 const char **include_list, int num_includes,
2054 int capping_symbol_number,
2055 struct partial_symtab **dependency_list,
2056 int number_dependencies, int textlow_not_set)
2060 if (capping_symbol_number != -1)
2061 ((struct symloc *) pst->read_symtab_private)->numsyms =
2062 capping_symbol_number
2063 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2064 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2065 first_fun_line_offset;
2066 first_fun_line_offset = 0;
2068 end_psymtab_common (objfile, pst);
2070 pst->number_of_dependencies = number_dependencies;
2071 if (number_dependencies)
2074 = objfile->partial_symtabs->allocate_dependencies (number_dependencies);
2075 memcpy (pst->dependencies, dependency_list,
2076 number_dependencies * sizeof (struct partial_symtab *));
2079 pst->dependencies = 0;
2081 for (i = 0; i < num_includes; i++)
2083 struct partial_symtab *subpst =
2084 allocate_psymtab (include_list[i], objfile);
2086 subpst->read_symtab_private = XOBNEW (&objfile->objfile_obstack, symloc);
2087 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2088 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2090 /* We could save slight bits of space by only making one of these,
2091 shared by the entire set of include files. FIXME-someday. */
2092 subpst->dependencies =
2093 objfile->partial_symtabs->allocate_dependencies (1);
2094 subpst->dependencies[0] = pst;
2095 subpst->number_of_dependencies = 1;
2097 subpst->read_symtab = pst->read_symtab;
2100 if (num_includes == 0
2101 && number_dependencies == 0
2102 && pst->n_global_syms == 0
2103 && pst->n_static_syms == 0)
2105 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2106 it is on the obstack, but we can forget to chain it on the list. */
2107 /* Empty psymtabs happen as a result of header files which don't have
2108 any symbols in them. There can be a lot of them. */
2110 discard_psymtab (objfile, pst);
2112 /* Indicate that psymtab was thrown away. */
2118 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2119 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2120 the symbol and its auxents. */
2123 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2124 const char **name, char **raw, unsigned int *symnump,
2125 struct objfile *objfile)
2127 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2128 if (symbol->n_zeroes)
2130 /* If it's exactly E_SYMNMLEN characters long it isn't
2132 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2134 /* FIXME: wastes memory for symbols which we don't end up putting
2135 into the minimal symbols. */
2138 p = (char *) obstack_alloc (&objfile->objfile_obstack,
2140 strncpy (p, symbol->n_name, E_SYMNMLEN);
2141 p[E_SYMNMLEN] = '\0';
2145 /* Point to the unswapped name as that persists as long as the
2147 *name = ((struct external_syment *) *raw)->e.e_name;
2149 else if (symbol->n_sclass & 0x80)
2151 *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
2155 *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
2158 *raw += coff_data (objfile->obfd)->local_symesz;
2159 if (symbol->n_numaux > 0)
2161 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2162 symbol->n_sclass, 0, symbol->n_numaux, aux);
2164 *symnump += symbol->n_numaux;
2165 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2170 function_outside_compilation_unit_complaint (const char *arg1)
2172 complaint (_("function `%s' appears to be defined "
2173 "outside of all compilation units"),
2178 scan_xcoff_symtab (minimal_symbol_reader &reader,
2179 struct objfile *objfile)
2181 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2182 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2183 const char *filestring = NULL;
2185 const char *namestring;
2190 /* Current partial symtab */
2191 struct partial_symtab *pst;
2193 /* List of current psymtab's include files. */
2194 const char **psymtab_include_list;
2195 int includes_allocated;
2198 /* Index within current psymtab dependency list. */
2199 struct partial_symtab **dependency_list;
2200 int dependencies_used, dependencies_allocated;
2203 struct internal_syment symbol;
2204 union internal_auxent main_aux[5];
2205 unsigned int ssymnum;
2207 const char *last_csect_name = NULL; /* Last seen csect's name and value. */
2208 CORE_ADDR last_csect_val = 0;
2209 int last_csect_sec = 0;
2210 int misc_func_recorded = 0; /* true if any misc. function. */
2211 int textlow_not_set = 1;
2213 pst = (struct partial_symtab *) 0;
2215 includes_allocated = 30;
2217 psymtab_include_list = (const char **) alloca (includes_allocated *
2218 sizeof (const char *));
2220 dependencies_allocated = 30;
2221 dependencies_used = 0;
2223 (struct partial_symtab **) alloca (dependencies_allocated *
2224 sizeof (struct partial_symtab *));
2226 set_last_source_file (NULL);
2228 abfd = objfile->obfd;
2229 next_symbol_text_func = xcoff_next_symbol_text;
2231 sraw_symbol = XCOFF_DATA (objfile)->symtbl;
2232 nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
2234 while (ssymnum < nsyms)
2240 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2241 sclass = symbol.n_sclass;
2249 /* The CSECT auxent--always the last auxent. */
2250 union internal_auxent csect_aux;
2251 unsigned int symnum_before = ssymnum;
2253 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2255 if (symbol.n_numaux > 1)
2257 bfd_coff_swap_aux_in
2259 sraw_symbol - coff_data (abfd)->local_symesz,
2262 symbol.n_numaux - 1,
2267 csect_aux = main_aux[0];
2269 /* If symbol name starts with ".$" or "$", ignore it. */
2270 if (namestring[0] == '$'
2271 || (namestring[0] == '.' && namestring[1] == '$'))
2274 switch (csect_aux.x_csect.x_smtyp & 0x7)
2277 switch (csect_aux.x_csect.x_smclas)
2280 if (last_csect_name)
2282 /* If no misc. function recorded in the last
2283 seen csect, enter it as a function. This
2284 will take care of functions like strcmp()
2287 if (!misc_func_recorded)
2289 record_minimal_symbol
2290 (reader, last_csect_name, last_csect_val,
2291 mst_text, last_csect_sec, objfile);
2292 misc_func_recorded = 1;
2297 /* We have to allocate one psymtab for
2298 each program csect, because their text
2299 sections need not be adjacent. */
2301 (objfile, pst, psymtab_include_list,
2302 includes_used, symnum_before, dependency_list,
2303 dependencies_used, textlow_not_set);
2305 dependencies_used = 0;
2306 /* Give all psymtabs for this source file the same
2308 pst = xcoff_start_psymtab
2314 /* Activate the misc_func_recorded mechanism for
2315 compiler- and linker-generated CSECTs like ".strcmp"
2317 if (namestring && (namestring[0] == '.'
2318 || namestring[0] == '@'))
2320 last_csect_name = namestring;
2321 last_csect_val = symbol.n_value;
2322 last_csect_sec = symbol.n_scnum;
2327 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2329 if (highval > pst->raw_text_high ())
2330 pst->set_text_high (highval);
2331 if (!pst->text_low_valid
2332 || symbol.n_value < pst->raw_text_low ())
2333 pst->set_text_low (symbol.n_value);
2335 misc_func_recorded = 0;
2340 /* Data variables are recorded in the minimal symbol
2341 table, except for section symbols. */
2342 if (*namestring != '.')
2343 record_minimal_symbol
2344 (reader, namestring, symbol.n_value,
2345 sclass == C_HIDEXT ? mst_file_data : mst_data,
2346 symbol.n_scnum, objfile);
2351 warning (_("More than one XMC_TC0 symbol found."));
2352 toc_offset = symbol.n_value;
2354 /* Make TOC offset relative to start address of
2356 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2358 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2362 /* These symbols tell us where the TOC entry for a
2363 variable is, not the variable itself. */
2372 switch (csect_aux.x_csect.x_smclas)
2375 /* A function entry point. */
2377 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2378 first_fun_line_offset =
2379 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2381 record_minimal_symbol
2382 (reader, namestring, symbol.n_value,
2383 sclass == C_HIDEXT ? mst_file_text : mst_text,
2384 symbol.n_scnum, objfile);
2385 misc_func_recorded = 1;
2389 /* shared library function trampoline code entry
2392 /* record trampoline code entries as
2393 mst_solib_trampoline symbol. When we lookup mst
2394 symbols, we will choose mst_text over
2395 mst_solib_trampoline. */
2396 record_minimal_symbol
2397 (reader, namestring, symbol.n_value,
2398 mst_solib_trampoline, symbol.n_scnum, objfile);
2399 misc_func_recorded = 1;
2403 /* The symbols often have the same names as
2404 debug symbols for functions, and confuse
2410 /* xlc puts each variable in a separate csect,
2411 so we get an XTY_SD for each variable. But
2412 gcc puts several variables in a csect, so
2413 that each variable only gets an XTY_LD. We
2414 still need to record them. This will
2415 typically be XMC_RW; I suspect XMC_RO and
2416 XMC_BS might be possible too. */
2417 if (*namestring != '.')
2418 record_minimal_symbol
2419 (reader, namestring, symbol.n_value,
2420 sclass == C_HIDEXT ? mst_file_data : mst_data,
2421 symbol.n_scnum, objfile);
2427 switch (csect_aux.x_csect.x_smclas)
2431 /* Common variables are recorded in the minimal symbol
2432 table, except for section symbols. */
2433 if (*namestring != '.')
2434 record_minimal_symbol
2435 (reader, namestring, symbol.n_value,
2436 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2437 symbol.n_scnum, objfile);
2449 unsigned int symnum_before;
2451 symnum_before = ssymnum;
2452 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2455 /* See if the last csect needs to be recorded. */
2457 if (last_csect_name && !misc_func_recorded)
2459 /* If no misc. function recorded in the last seen csect, enter
2460 it as a function. This will take care of functions like
2461 strcmp() compiled by xlc. */
2463 record_minimal_symbol (reader, last_csect_name, last_csect_val,
2464 mst_text, last_csect_sec, objfile);
2465 misc_func_recorded = 1;
2470 xcoff_end_psymtab (objfile, pst, psymtab_include_list,
2471 includes_used, symnum_before,
2472 dependency_list, dependencies_used,
2475 dependencies_used = 0;
2477 first_fun_line_offset = 0;
2479 /* XCOFF, according to the AIX 3.2 documentation, puts the
2480 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2481 do things the standard COFF way and put it in the auxent.
2482 We use the auxent if the symbol is ".file" and an auxent
2483 exists, otherwise use the symbol itself. */
2484 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2486 filestring = coff_getfilename (&main_aux[0], objfile);
2489 filestring = namestring;
2491 pst = xcoff_start_psymtab (objfile,
2494 last_csect_name = NULL;
2500 complaint (_("Storage class %d not recognized during scan"),
2506 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2507 to handle only the C_FUN and C_EXT. */
2521 /* C_EINCL means we are switching back to the main file. But there
2522 is no reason to care; the only thing we want to know about
2523 includes is the names of all the included (.h) files. */
2528 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2532 /* I don't think the name of the common block (as opposed to the
2533 variables within it) is something which is user visible
2541 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2542 so C_LSYM would appear to be only for locals. */
2548 /* We probably could save a few instructions by assuming that
2549 C_LSYM, C_PSYM, etc., never have auxents. */
2550 int naux1 = symbol.n_numaux + 1;
2553 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2559 /* Mark down an include file in the current psymtab. */
2560 enum language tmp_language;
2562 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2565 tmp_language = deduce_language_from_filename (namestring);
2567 /* Only change the psymtab's language if we've learned
2568 something useful (eg. tmp_language is not language_unknown).
2569 In addition, to match what start_subfile does, never change
2571 if (tmp_language != language_unknown
2572 && (tmp_language != language_c
2573 || psymtab_language != language_cplus))
2574 psymtab_language = tmp_language;
2576 /* In C++, one may expect the same filename to come round many
2577 times, when code is coming alternately from the main file
2578 and from inline functions in other files. So I check to see
2579 if this is a file we've seen before -- either the main
2580 source file, or a previously included file.
2582 This seems to be a lot of time to be spending on N_SOL, but
2583 things like "break c-exp.y:435" need to work (I
2584 suppose the psymtab_include_list could be hashed or put
2585 in a binary tree, if profiling shows this is a major hog). */
2586 if (pst && strcmp (namestring, pst->filename) == 0)
2592 for (i = 0; i < includes_used; i++)
2593 if (strcmp (namestring, psymtab_include_list[i]) == 0)
2601 psymtab_include_list[includes_used++] = namestring;
2602 if (includes_used >= includes_allocated)
2604 const char **orig = psymtab_include_list;
2606 psymtab_include_list = (const char **)
2607 alloca ((includes_allocated *= 2) *
2608 sizeof (const char *));
2609 memcpy (psymtab_include_list, orig,
2610 includes_used * sizeof (const char *));
2615 /* The value of the C_FUN is not the address of the function (it
2616 appears to be the address before linking), but as long as it
2617 is smaller than the actual address, then find_pc_partial_function
2618 will use the minimal symbols instead. I hope. */
2627 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2630 p = strchr (namestring, ':');
2632 continue; /* Not a debugging symbol. */
2634 /* Main processing section for debugging symbols which
2635 the initial read through the symbol tables needs to worry
2636 about. If we reach this point, the symbol which we are
2637 considering is definitely one we are interested in.
2638 p must also contain the (valid) index into the namestring
2639 which indicates the debugging type symbol. */
2644 if (gdbarch_static_transform_name_p (gdbarch))
2645 namestring = gdbarch_static_transform_name
2646 (gdbarch, namestring);
2648 add_psymbol_to_list (namestring, p - namestring, 1,
2649 VAR_DOMAIN, LOC_STATIC,
2650 SECT_OFF_DATA (objfile),
2651 psymbol_placement::STATIC,
2653 psymtab_language, objfile);
2657 /* The addresses in these entries are reported to be
2658 wrong. See the code that reads 'G's for symtabs. */
2659 add_psymbol_to_list (namestring, p - namestring, 1,
2660 VAR_DOMAIN, LOC_STATIC,
2661 SECT_OFF_DATA (objfile),
2662 psymbol_placement::GLOBAL,
2664 psymtab_language, objfile);
2668 /* When a 'T' entry is defining an anonymous enum, it
2669 may have a name which is the empty string, or a
2670 single space. Since they're not really defining a
2671 symbol, those shouldn't go in the partial symbol
2672 table. We do pick up the elements of such enums at
2673 'check_enum:', below. */
2674 if (p >= namestring + 2
2675 || (p == namestring + 1
2676 && namestring[0] != ' '))
2678 add_psymbol_to_list (namestring, p - namestring, 1,
2679 STRUCT_DOMAIN, LOC_TYPEDEF, -1,
2680 psymbol_placement::STATIC,
2681 0, psymtab_language, objfile);
2684 /* Also a typedef with the same name. */
2685 add_psymbol_to_list (namestring, p - namestring, 1,
2686 VAR_DOMAIN, LOC_TYPEDEF, -1,
2687 psymbol_placement::STATIC,
2688 0, psymtab_language, objfile);
2695 if (p != namestring) /* a name is there, not just :T... */
2697 add_psymbol_to_list (namestring, p - namestring, 1,
2698 VAR_DOMAIN, LOC_TYPEDEF, -1,
2699 psymbol_placement::STATIC,
2700 0, psymtab_language, objfile);
2703 /* If this is an enumerated type, we need to
2704 add all the enum constants to the partial symbol
2705 table. This does not cover enums without names, e.g.
2706 "enum {a, b} c;" in C, but fortunately those are
2707 rare. There is no way for GDB to find those from the
2708 enum type without spending too much time on it. Thus
2709 to solve this problem, the compiler needs to put out the
2710 enum in a nameless type. GCC2 does this. */
2712 /* We are looking for something of the form
2713 <name> ":" ("t" | "T") [<number> "="] "e"
2714 {<constant> ":" <value> ","} ";". */
2716 /* Skip over the colon and the 't' or 'T'. */
2718 /* This type may be given a number. Also, numbers can come
2719 in pairs like (0,26). Skip over it. */
2720 while ((*p >= '0' && *p <= '9')
2721 || *p == '(' || *p == ',' || *p == ')'
2727 /* The aix4 compiler emits extra crud before the
2731 /* Skip over the type (?). */
2735 /* Skip over the colon. */
2739 /* We have found an enumerated type. */
2740 /* According to comments in read_enum_type
2741 a comma could end it instead of a semicolon.
2742 I don't know where that happens.
2744 while (*p && *p != ';' && *p != ',')
2748 /* Check for and handle cretinous dbx symbol name
2750 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
2751 p = next_symbol_text (objfile);
2753 /* Point to the character after the name
2754 of the enum constant. */
2755 for (q = p; *q && *q != ':'; q++)
2757 /* Note that the value doesn't matter for
2758 enum constants in psymtabs, just in symtabs. */
2759 add_psymbol_to_list (p, q - p, 1,
2760 VAR_DOMAIN, LOC_CONST, -1,
2761 psymbol_placement::STATIC,
2762 0, psymtab_language, objfile);
2763 /* Point past the name. */
2765 /* Skip over the value. */
2766 while (*p && *p != ',')
2768 /* Advance past the comma. */
2776 /* Constant, e.g. from "const" in Pascal. */
2777 add_psymbol_to_list (namestring, p - namestring, 1,
2778 VAR_DOMAIN, LOC_CONST, -1,
2779 psymbol_placement::STATIC,
2780 0, psymtab_language, objfile);
2786 int name_len = p - namestring;
2787 char *name = (char *) xmalloc (name_len + 1);
2789 memcpy (name, namestring, name_len);
2790 name[name_len] = '\0';
2791 function_outside_compilation_unit_complaint (name);
2794 add_psymbol_to_list (namestring, p - namestring, 1,
2795 VAR_DOMAIN, LOC_BLOCK,
2796 SECT_OFF_TEXT (objfile),
2797 psymbol_placement::STATIC,
2799 psymtab_language, objfile);
2802 /* Global functions were ignored here, but now they
2803 are put into the global psymtab like one would expect.
2804 They're also in the minimal symbol table. */
2808 int name_len = p - namestring;
2809 char *name = (char *) xmalloc (name_len + 1);
2811 memcpy (name, namestring, name_len);
2812 name[name_len] = '\0';
2813 function_outside_compilation_unit_complaint (name);
2817 /* We need only the minimal symbols for these
2818 loader-generated definitions. Keeping the global
2819 symbols leads to "in psymbols but not in symbols"
2821 if (startswith (namestring, "@FIX"))
2824 add_psymbol_to_list (namestring, p - namestring, 1,
2825 VAR_DOMAIN, LOC_BLOCK,
2826 SECT_OFF_TEXT (objfile),
2827 psymbol_placement::GLOBAL,
2829 psymtab_language, objfile);
2832 /* Two things show up here (hopefully); static symbols of
2833 local scope (static used inside braces) or extensions
2834 of structure symbols. We can ignore both. */
2848 case '#': /* For symbol identification (used in
2853 /* It is a C++ nested symbol. We don't need to record it
2854 (I don't think); if we try to look up foo::bar::baz,
2855 then symbols for the symtab containing foo should get
2856 read in, I think. */
2857 /* Someone says sun cc puts out symbols like
2858 /foo/baz/maclib::/usr/local/bin/maclib,
2859 which would get here with a symbol type of ':'. */
2863 /* Unexpected symbol descriptor. The second and
2864 subsequent stabs of a continued stab can show up
2865 here. The question is whether they ever can mimic
2866 a normal stab--it would be nice if not, since we
2867 certainly don't want to spend the time searching to
2868 the end of every string looking for a
2871 complaint (_("unknown symbol descriptor `%c'"), p[1]);
2873 /* Ignore it; perhaps it is an extension that we don't
2883 xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
2884 ssymnum, dependency_list,
2885 dependencies_used, textlow_not_set);
2888 /* Record the toc offset value of this symbol table into objfile
2889 structure. If no XMC_TC0 is found, toc_offset should be zero.
2890 Another place to obtain this information would be file auxiliary
2893 XCOFF_DATA (objfile)->toc_offset = toc_offset;
2896 /* Return the toc offset value for a given objfile. */
2899 xcoff_get_toc_offset (struct objfile *objfile)
2902 return XCOFF_DATA (objfile)->toc_offset;
2906 /* Scan and build partial symbols for a symbol file.
2907 We have been initialized by a call to dbx_symfile_init, which
2908 put all the relevant info into a "struct dbx_symfile_info",
2909 hung off the objfile structure.
2911 SECTION_OFFSETS contains offsets relative to which the symbols in the
2912 various sections are (depending where the sections were actually
2916 xcoff_initial_scan (struct objfile *objfile, symfile_add_flags symfile_flags)
2920 int num_symbols; /* # of symbols */
2921 file_ptr symtab_offset; /* symbol table and */
2922 file_ptr stringtab_offset; /* string table file offsets */
2923 struct xcoff_symfile_info *info;
2927 info = XCOFF_DATA (objfile);
2928 symfile_bfd = abfd = objfile->obfd;
2929 name = objfile_name (objfile);
2931 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2932 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2933 stringtab_offset = symtab_offset +
2934 num_symbols * coff_data (abfd)->local_symesz;
2936 info->min_lineno_offset = 0;
2937 info->max_lineno_offset = 0;
2938 bfd_map_over_sections (abfd, find_linenos, info);
2940 if (num_symbols > 0)
2942 /* Read the string table. */
2943 init_stringtab (abfd, stringtab_offset, objfile);
2945 /* Read the .debug section, if present and if we're not ignoring
2947 if (!(objfile->flags & OBJF_READNEVER))
2949 struct bfd_section *secp;
2950 bfd_size_type length;
2951 bfd_byte *debugsec = NULL;
2953 secp = bfd_get_section_by_name (abfd, ".debug");
2956 length = bfd_section_size (abfd, secp);
2960 = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
2963 if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
2965 error (_("Error reading .debug section of `%s': %s"),
2966 name, bfd_errmsg (bfd_get_error ()));
2970 info->debugsec = (char *) debugsec;
2974 /* Read the symbols. We keep them in core because we will want to
2975 access them randomly in read_symbol*. */
2976 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2978 error (_("Error reading symbols from %s: %s"),
2979 name, bfd_errmsg (bfd_get_error ()));
2980 size = coff_data (abfd)->local_symesz * num_symbols;
2981 info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size);
2982 info->symtbl_num_syms = num_symbols;
2984 val = bfd_bread (info->symtbl, size, abfd);
2986 perror_with_name (_("reading symbol table"));
2988 /* I'm not sure how how good num_symbols is; the rule of thumb in
2989 init_psymbol_list was developed for a.out. On the one hand,
2990 num_symbols includes auxents. On the other hand, it doesn't
2992 init_psymbol_list (objfile, num_symbols);
2994 scoped_free_pendings free_pending;
2995 minimal_symbol_reader reader (objfile);
2997 /* Now that the symbol table data of the executable file are all in core,
2998 process them and define symbols accordingly. */
3000 scan_xcoff_symtab (reader, objfile);
3002 /* Install any minimal symbols that have been collected as the current
3003 minimal symbols for this objfile. */
3007 /* DWARF2 sections. */
3009 if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
3010 dwarf2_build_psymtabs (objfile);
3012 dwarf2_build_frame_info (objfile);
3016 xcoff_symfile_offsets (struct objfile *objfile,
3017 const section_addr_info &addrs)
3019 const char *first_section_name;
3021 default_symfile_offsets (objfile, addrs);
3023 /* Oneof the weird side-effects of default_symfile_offsets is that
3024 it sometimes sets some section indices to zero for sections that,
3025 in fact do not exist. See the body of default_symfile_offsets
3026 for more info on when that happens. Undo that, as this then allows
3027 us to test whether the associated section exists or not, and then
3028 access it quickly (without searching it again). */
3030 if (objfile->num_sections == 0)
3031 return; /* Is that even possible? Better safe than sorry. */
3034 = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
3036 if (objfile->sect_index_text == 0
3037 && strcmp (first_section_name, ".text") != 0)
3038 objfile->sect_index_text = -1;
3040 if (objfile->sect_index_data == 0
3041 && strcmp (first_section_name, ".data") != 0)
3042 objfile->sect_index_data = -1;
3044 if (objfile->sect_index_bss == 0
3045 && strcmp (first_section_name, ".bss") != 0)
3046 objfile->sect_index_bss = -1;
3048 if (objfile->sect_index_rodata == 0
3049 && strcmp (first_section_name, ".rodata") != 0)
3050 objfile->sect_index_rodata = -1;
3053 /* Register our ability to parse symbols for xcoff BFD files. */
3055 static const struct sym_fns xcoff_sym_fns =
3058 /* It is possible that coff and xcoff should be merged as
3059 they do have fundamental similarities (for example, the extra storage
3060 classes used for stabs could presumably be recognized in any COFF file).
3061 However, in addition to obvious things like all the csect hair, there are
3062 some subtler differences between xcoffread.c and coffread.c, notably
3063 the fact that coffread.c has no need to read in all the symbols, but
3064 xcoffread.c reads all the symbols and does in fact randomly access them
3065 (in C_BSTAT and line number processing). */
3067 xcoff_new_init, /* init anything gbl to entire symtab */
3068 xcoff_symfile_init, /* read initial info, setup for sym_read() */
3069 xcoff_initial_scan, /* read a symbol file into symtab */
3070 NULL, /* sym_read_psymbols */
3071 xcoff_symfile_finish, /* finished with file, cleanup */
3072 xcoff_symfile_offsets, /* xlate offsets ext->int form */
3073 default_symfile_segments, /* Get segment information from a file. */
3074 aix_process_linenos,
3075 default_symfile_relocate, /* Relocate a debug section. */
3076 NULL, /* sym_probe_fns */
3080 /* Same as xcoff_get_n_import_files, but for core files. */
3083 xcoff_get_core_n_import_files (bfd *abfd)
3085 asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
3087 file_ptr offset = 0;
3091 return -1; /* Not a core file. */
3093 for (offset = 0; offset < bfd_get_section_size (sect);)
3099 if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
3101 next = bfd_get_32 (abfd, buf);
3103 break; /* This is the last entry. */
3107 /* Return the number of entries, excluding the first one, which is
3108 the path to the executable that produced this core file. */
3109 return n_entries - 1;
3112 /* Return the number of import files (shared libraries) that the given
3113 BFD depends on. Return -1 if this number could not be computed. */
3116 xcoff_get_n_import_files (bfd *abfd)
3118 asection *sect = bfd_get_section_by_name (abfd, ".loader");
3122 /* If the ".loader" section does not exist, the objfile is probably
3123 not an executable. Might be a core file... */
3125 return xcoff_get_core_n_import_files (abfd);
3127 /* The number of entries in the Import Files Table is stored in
3128 field l_nimpid. This field is always at offset 16, and is
3129 always 4 bytes long. Read those 4 bytes. */
3131 if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
3133 l_nimpid = bfd_get_32 (abfd, buf);
3135 /* By convention, the first entry is the default LIBPATH value
3136 to be used by the system loader, so it does not count towards
3137 the number of import files. */
3138 return l_nimpid - 1;
3142 _initialize_xcoffread (void)
3144 add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);