3177 lines
89 KiB
C
3177 lines
89 KiB
C
/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
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Copyright (C) 1986-2016 Free Software Foundation, Inc.
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Derived from coffread.c, dbxread.c, and a lot of hacking.
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Contributed by IBM Corporation.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "bfd.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#include <ctype.h>
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#include <sys/stat.h>
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#include "coff/internal.h"
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#include "libcoff.h" /* FIXME, internal data from BFD */
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#include "coff/xcoff.h"
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#include "libxcoff.h"
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#include "coff/rs6000.h"
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#include "xcoffread.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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/* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
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#include "symfile.h"
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#include "objfiles.h"
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#include "buildsym.h"
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#include "stabsread.h"
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#include "expression.h"
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#include "complaints.h"
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#include "psympriv.h"
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#include "gdb-stabs.h"
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/* For interface with stabsread.c. */
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#include "aout/stab_gnu.h"
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/* Key for XCOFF-associated data. */
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static const struct objfile_data *xcoff_objfile_data_key;
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/* We put a pointer to this structure in the read_symtab_private field
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of the psymtab. */
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struct symloc
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{
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/* First symbol number for this file. */
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int first_symnum;
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/* Number of symbols in the section of the symbol table devoted to
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this file's symbols (actually, the section bracketed may contain
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more than just this file's symbols). If numsyms is 0, the only
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reason for this thing's existence is the dependency list. Nothing
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else will happen when it is read in. */
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int numsyms;
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/* Position of the start of the line number information for this
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psymtab. */
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unsigned int lineno_off;
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};
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/* Remember what we deduced to be the source language of this psymtab. */
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static enum language psymtab_language = language_unknown;
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/* Simplified internal version of coff symbol table information. */
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struct coff_symbol
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{
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char *c_name;
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int c_symnum; /* Symbol number of this entry. */
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int c_naux; /* 0 if syment only, 1 if syment + auxent. */
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CORE_ADDR c_value;
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unsigned char c_sclass;
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int c_secnum;
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unsigned int c_type;
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};
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/* Last function's saved coff symbol `cs'. */
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static struct coff_symbol fcn_cs_saved;
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static bfd *symfile_bfd;
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/* Core address of start and end of text of current source file.
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This is calculated from the first function seen after a C_FILE
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symbol. */
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static CORE_ADDR cur_src_end_addr;
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/* Core address of the end of the first object file. */
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static CORE_ADDR first_object_file_end;
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/* Initial symbol-table-debug-string vector length. */
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#define INITIAL_STABVECTOR_LENGTH 40
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/* Size of a COFF symbol. I think it is always 18, so I'm not sure
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there is any reason not to just use a #define, but might as well
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ask BFD for the size and store it here, I guess. */
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static unsigned local_symesz;
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struct coff_symfile_info
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{
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file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
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file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
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/* Pointer to the string table. */
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char *strtbl;
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/* Pointer to debug section. */
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char *debugsec;
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/* Pointer to the a.out symbol table. */
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char *symtbl;
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/* Number of symbols in symtbl. */
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int symtbl_num_syms;
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/* Offset in data section to TOC anchor. */
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CORE_ADDR toc_offset;
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};
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/* Convenience macro to access the per-objfile XCOFF data. */
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#define XCOFF_DATA(objfile) \
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((struct coff_symfile_info *) objfile_data ((objfile), \
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xcoff_objfile_data_key))
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/* XCOFF names for dwarf sections. There is no compressed sections. */
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static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
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{ ".dwinfo", NULL },
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{ ".dwabrev", NULL },
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{ ".dwline", NULL },
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{ ".dwloc", NULL },
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/* AIX XCOFF defines one, named DWARF section for macro debug information.
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XLC does not generate debug_macinfo for DWARF4 and below.
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The section is assigned to debug_macro for DWARF5 and above. */
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{ NULL, NULL },
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{ ".dwmac", NULL },
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{ ".dwstr", NULL },
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{ ".dwrnges", NULL },
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{ ".dwpbtyp", NULL },
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{ NULL, NULL }, /* debug_addr */
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{ ".dwframe", NULL },
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{ NULL, NULL }, /* eh_frame */
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{ NULL, NULL }, /* gdb_index */
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23
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};
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static void
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bf_notfound_complaint (void)
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{
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complaint (&symfile_complaints,
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_("line numbers off, `.bf' symbol not found"));
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}
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static void
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ef_complaint (int arg1)
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{
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complaint (&symfile_complaints,
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_("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
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}
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static void
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eb_complaint (int arg1)
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{
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complaint (&symfile_complaints,
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_("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
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}
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static void xcoff_initial_scan (struct objfile *, int);
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static void scan_xcoff_symtab (struct objfile *);
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static char *xcoff_next_symbol_text (struct objfile *);
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static void record_include_begin (struct coff_symbol *);
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static void
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enter_line_range (struct subfile *, unsigned, unsigned,
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CORE_ADDR, CORE_ADDR, unsigned *);
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static void init_stringtab (bfd *, file_ptr, struct objfile *);
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static void xcoff_symfile_init (struct objfile *);
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static void xcoff_new_init (struct objfile *);
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static void xcoff_symfile_finish (struct objfile *);
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static char *coff_getfilename (union internal_auxent *, struct objfile *);
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static void read_symbol (struct internal_syment *, int);
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static int read_symbol_lineno (int);
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static CORE_ADDR read_symbol_nvalue (int);
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static struct symbol *process_xcoff_symbol (struct coff_symbol *,
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struct objfile *);
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static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
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#if 0
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static void add_stab_to_list (char *, struct pending_stabs **);
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#endif
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static int compare_lte (const void *, const void *);
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static struct linetable *arrange_linetable (struct linetable *);
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static void record_include_end (struct coff_symbol *);
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static void process_linenos (CORE_ADDR, CORE_ADDR);
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/* Translate from a COFF section number (target_index) to a SECT_OFF_*
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code. */
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static int secnum_to_section (int, struct objfile *);
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static asection *secnum_to_bfd_section (int, struct objfile *);
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struct find_targ_sec_arg
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{
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int targ_index;
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int *resultp;
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asection **bfd_sect;
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struct objfile *objfile;
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};
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static void find_targ_sec (bfd *, asection *, void *);
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static void
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find_targ_sec (bfd *abfd, asection *sect, void *obj)
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{
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struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
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struct objfile *objfile = args->objfile;
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if (sect->target_index == args->targ_index)
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{
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/* This is the section. Figure out what SECT_OFF_* code it is. */
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if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
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*args->resultp = SECT_OFF_TEXT (objfile);
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else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
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*args->resultp = SECT_OFF_DATA (objfile);
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else
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*args->resultp = gdb_bfd_section_index (abfd, sect);
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*args->bfd_sect = sect;
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}
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}
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/* Search all BFD sections for the section whose target_index is
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equal to N_SCNUM. Set *BFD_SECT to that section. The section's
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associated index in the objfile's section_offset table is also
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stored in *SECNUM.
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If no match is found, *BFD_SECT is set to NULL, and *SECNUM
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is set to the text section's number. */
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static void
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xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
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asection **bfd_sect, int *secnum)
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{
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struct find_targ_sec_arg args;
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args.targ_index = n_scnum;
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args.resultp = secnum;
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args.bfd_sect = bfd_sect;
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args.objfile = objfile;
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*bfd_sect = NULL;
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*secnum = SECT_OFF_TEXT (objfile);
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bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
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}
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/* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
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static int
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secnum_to_section (int n_scnum, struct objfile *objfile)
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{
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int secnum;
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asection *ignored;
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xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
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return secnum;
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}
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/* Return the BFD section that N_SCNUM points to. */
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static asection *
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secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
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{
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int ignored;
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asection *bfd_sect;
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xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
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return bfd_sect;
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}
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/* add a given stab string into given stab vector. */
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#if 0
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static void
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add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
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{
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if (*stabvector == NULL)
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{
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*stabvector = (struct pending_stabs *)
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xmalloc (sizeof (struct pending_stabs) +
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INITIAL_STABVECTOR_LENGTH * sizeof (char *));
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(*stabvector)->count = 0;
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(*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
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}
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else if ((*stabvector)->count >= (*stabvector)->length)
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{
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(*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
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*stabvector = (struct pending_stabs *)
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xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
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(*stabvector)->length * sizeof (char *));
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}
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(*stabvector)->stab[(*stabvector)->count++] = stabname;
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}
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#endif
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/* *INDENT-OFF* */
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/* Linenos are processed on a file-by-file basis.
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Two reasons:
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1) xlc (IBM's native c compiler) postpones static function code
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emission to the end of a compilation unit. This way it can
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determine if those functions (statics) are needed or not, and
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can do some garbage collection (I think). This makes line
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numbers and corresponding addresses unordered, and we end up
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with a line table like:
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lineno addr
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foo() 10 0x100
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20 0x200
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30 0x300
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foo3() 70 0x400
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80 0x500
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90 0x600
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static foo2()
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40 0x700
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50 0x800
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60 0x900
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and that breaks gdb's binary search on line numbers, if the
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above table is not sorted on line numbers. And that sort
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should be on function based, since gcc can emit line numbers
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like:
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10 0x100 - for the init/test part of a for stmt.
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20 0x200
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30 0x300
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10 0x400 - for the increment part of a for stmt.
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arrange_linetable() will do this sorting.
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2) aix symbol table might look like:
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c_file // beginning of a new file
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.bi // beginning of include file
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.ei // end of include file
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.bi
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.ei
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basically, .bi/.ei pairs do not necessarily encapsulate
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their scope. They need to be recorded, and processed later
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on when we come the end of the compilation unit.
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Include table (inclTable) and process_linenos() handle
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that. */
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/* *INDENT-ON* */
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/* compare line table entry addresses. */
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static int
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compare_lte (const void *lte1p, const void *lte2p)
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{
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struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
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struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
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return lte1->pc - lte2->pc;
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}
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/* Given a line table with function entries are marked, arrange its
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functions in ascending order and strip off function entry markers
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and return it in a newly created table. If the old one is good
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enough, return the old one. */
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/* FIXME: I think all this stuff can be replaced by just passing
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sort_linevec = 1 to end_symtab. */
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static struct linetable *
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arrange_linetable (struct linetable *oldLineTb)
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{
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int ii, jj, newline, /* new line count */
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function_count; /* # of functions */
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struct linetable_entry *fentry; /* function entry vector */
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int fentry_size; /* # of function entries */
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struct linetable *newLineTb; /* new line table */
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int extra_lines = 0;
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#define NUM_OF_FUNCTIONS 20
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fentry_size = NUM_OF_FUNCTIONS;
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fentry = XNEWVEC (struct linetable_entry, fentry_size);
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for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
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{
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if (oldLineTb->item[ii].line == 0)
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{ /* Function entry found. */
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if (function_count >= fentry_size)
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{ /* Make sure you have room. */
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fentry_size *= 2;
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fentry = (struct linetable_entry *)
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xrealloc (fentry,
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fentry_size * sizeof (struct linetable_entry));
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}
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fentry[function_count].line = ii;
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fentry[function_count].pc = oldLineTb->item[ii].pc;
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++function_count;
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/* If the function was compiled with XLC, we may have to add an
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extra line entry later. Reserve space for that. */
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if (ii + 1 < oldLineTb->nitems
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&& oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
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extra_lines++;
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}
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}
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||
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if (function_count == 0)
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{
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xfree (fentry);
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return oldLineTb;
|
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}
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else if (function_count > 1)
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qsort (fentry, function_count,
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sizeof (struct linetable_entry), compare_lte);
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|
||
/* Allocate a new line table. */
|
||
newLineTb = (struct linetable *)
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xmalloc
|
||
(sizeof (struct linetable) +
|
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(oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry));
|
||
|
||
/* If line table does not start with a function beginning, copy up until
|
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a function begin. */
|
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|
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newline = 0;
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if (oldLineTb->item[0].line != 0)
|
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for (newline = 0;
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newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
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newLineTb->item[newline] = oldLineTb->item[newline];
|
||
|
||
/* Now copy function lines one by one. */
|
||
|
||
for (ii = 0; ii < function_count; ++ii)
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{
|
||
/* If the function was compiled with XLC, we may have to add an
|
||
extra line to cover the function prologue. */
|
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jj = fentry[ii].line;
|
||
if (jj + 1 < oldLineTb->nitems
|
||
&& oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
|
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{
|
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newLineTb->item[newline] = oldLineTb->item[jj];
|
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newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
|
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newline++;
|
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}
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|
||
for (jj = fentry[ii].line + 1;
|
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jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
|
||
++jj, ++newline)
|
||
newLineTb->item[newline] = oldLineTb->item[jj];
|
||
}
|
||
xfree (fentry);
|
||
/* The number of items in the line table must include these
|
||
extra lines which were added in case of XLC compiled functions. */
|
||
newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
|
||
return newLineTb;
|
||
}
|
||
|
||
/* include file support: C_BINCL/C_EINCL pairs will be kept in the
|
||
following `IncludeChain'. At the end of each symtab (end_symtab),
|
||
we will determine if we should create additional symtab's to
|
||
represent if (the include files. */
|
||
|
||
|
||
typedef struct _inclTable
|
||
{
|
||
char *name; /* include filename */
|
||
|
||
/* Offsets to the line table. end points to the last entry which is
|
||
part of this include file. */
|
||
int begin, end;
|
||
|
||
struct subfile *subfile;
|
||
unsigned funStartLine; /* Start line # of its function. */
|
||
}
|
||
InclTable;
|
||
|
||
#define INITIAL_INCLUDE_TABLE_LENGTH 20
|
||
static InclTable *inclTable; /* global include table */
|
||
static int inclIndx; /* last entry to table */
|
||
static int inclLength; /* table length */
|
||
static int inclDepth; /* nested include depth */
|
||
|
||
static void allocate_include_entry (void);
|
||
|
||
static void
|
||
record_include_begin (struct coff_symbol *cs)
|
||
{
|
||
if (inclDepth)
|
||
{
|
||
/* In xcoff, we assume include files cannot be nested (not in .c files
|
||
of course, but in corresponding .s files.). */
|
||
|
||
/* This can happen with old versions of GCC.
|
||
GCC 2.3.3-930426 does not exhibit this on a test case which
|
||
a user said produced the message for him. */
|
||
complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
|
||
}
|
||
++inclDepth;
|
||
|
||
allocate_include_entry ();
|
||
|
||
inclTable[inclIndx].name = cs->c_name;
|
||
inclTable[inclIndx].begin = cs->c_value;
|
||
}
|
||
|
||
static void
|
||
record_include_end (struct coff_symbol *cs)
|
||
{
|
||
InclTable *pTbl;
|
||
|
||
if (inclDepth == 0)
|
||
{
|
||
complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
|
||
}
|
||
|
||
allocate_include_entry ();
|
||
|
||
pTbl = &inclTable[inclIndx];
|
||
pTbl->end = cs->c_value;
|
||
|
||
--inclDepth;
|
||
++inclIndx;
|
||
}
|
||
|
||
static void
|
||
allocate_include_entry (void)
|
||
{
|
||
if (inclTable == NULL)
|
||
{
|
||
inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
|
||
inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
|
||
inclIndx = 0;
|
||
}
|
||
else if (inclIndx >= inclLength)
|
||
{
|
||
inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
|
||
inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
|
||
memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
|
||
'\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
|
||
}
|
||
}
|
||
|
||
/* Global variable to pass the psymtab down to all the routines involved
|
||
in psymtab to symtab processing. */
|
||
static struct partial_symtab *this_symtab_psymtab;
|
||
|
||
/* Objfile related to this_symtab_psymtab; set at the same time. */
|
||
static struct objfile *this_symtab_objfile;
|
||
|
||
/* given the start and end addresses of a compilation unit (or a csect,
|
||
at times) process its lines and create appropriate line vectors. */
|
||
|
||
static void
|
||
process_linenos (CORE_ADDR start, CORE_ADDR end)
|
||
{
|
||
int offset, ii;
|
||
file_ptr max_offset
|
||
= XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
|
||
|
||
/* subfile structure for the main compilation unit. */
|
||
struct subfile main_subfile;
|
||
|
||
/* In the main source file, any time we see a function entry, we
|
||
reset this variable to function's absolute starting line number.
|
||
All the following line numbers in the function are relative to
|
||
this, and we record absolute line numbers in record_line(). */
|
||
|
||
unsigned int main_source_baseline = 0;
|
||
|
||
unsigned *firstLine;
|
||
|
||
offset =
|
||
((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
|
||
if (offset == 0)
|
||
goto return_after_cleanup;
|
||
|
||
memset (&main_subfile, '\0', sizeof (main_subfile));
|
||
|
||
if (inclIndx == 0)
|
||
/* All source lines were in the main source file. None in include
|
||
files. */
|
||
|
||
enter_line_range (&main_subfile, offset, 0, start, end,
|
||
&main_source_baseline);
|
||
|
||
else
|
||
{
|
||
/* There was source with line numbers in include files. */
|
||
|
||
int linesz =
|
||
coff_data (this_symtab_objfile->obfd)->local_linesz;
|
||
main_source_baseline = 0;
|
||
|
||
for (ii = 0; ii < inclIndx; ++ii)
|
||
{
|
||
struct subfile *tmpSubfile;
|
||
|
||
/* If there is main file source before include file, enter it. */
|
||
if (offset < inclTable[ii].begin)
|
||
{
|
||
enter_line_range
|
||
(&main_subfile, offset, inclTable[ii].begin - linesz,
|
||
start, 0, &main_source_baseline);
|
||
}
|
||
|
||
if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
|
||
{
|
||
/* The entry in the include table refers to the main source
|
||
file. Add the lines to the main subfile. */
|
||
|
||
main_source_baseline = inclTable[ii].funStartLine;
|
||
enter_line_range
|
||
(&main_subfile, inclTable[ii].begin, inclTable[ii].end,
|
||
start, 0, &main_source_baseline);
|
||
inclTable[ii].subfile = &main_subfile;
|
||
}
|
||
else
|
||
{
|
||
/* Have a new subfile for the include file. */
|
||
|
||
tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile);
|
||
|
||
memset (tmpSubfile, '\0', sizeof (struct subfile));
|
||
firstLine = &(inclTable[ii].funStartLine);
|
||
|
||
/* Enter include file's lines now. */
|
||
enter_line_range (tmpSubfile, inclTable[ii].begin,
|
||
inclTable[ii].end, start, 0, firstLine);
|
||
}
|
||
|
||
if (offset <= inclTable[ii].end)
|
||
offset = inclTable[ii].end + linesz;
|
||
}
|
||
|
||
/* All the include files' line have been processed at this point. Now,
|
||
enter remaining lines of the main file, if any left. */
|
||
if (offset < max_offset + 1 - linesz)
|
||
{
|
||
enter_line_range (&main_subfile, offset, 0, start, end,
|
||
&main_source_baseline);
|
||
}
|
||
}
|
||
|
||
/* Process main file's line numbers. */
|
||
if (main_subfile.line_vector)
|
||
{
|
||
struct linetable *lineTb, *lv;
|
||
|
||
lv = main_subfile.line_vector;
|
||
|
||
/* Line numbers are not necessarily ordered. xlc compilation will
|
||
put static function to the end. */
|
||
|
||
lineTb = arrange_linetable (lv);
|
||
if (lv == lineTb)
|
||
{
|
||
current_subfile->line_vector = (struct linetable *)
|
||
xrealloc (lv, (sizeof (struct linetable)
|
||
+ lv->nitems * sizeof (struct linetable_entry)));
|
||
}
|
||
else
|
||
{
|
||
xfree (lv);
|
||
current_subfile->line_vector = lineTb;
|
||
}
|
||
|
||
current_subfile->line_vector_length =
|
||
current_subfile->line_vector->nitems;
|
||
}
|
||
|
||
/* Now, process included files' line numbers. */
|
||
|
||
for (ii = 0; ii < inclIndx; ++ii)
|
||
{
|
||
if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
|
||
&& (inclTable[ii].subfile)->line_vector) /* Useless if!!!
|
||
FIXMEmgo */
|
||
{
|
||
struct linetable *lineTb, *lv;
|
||
|
||
lv = (inclTable[ii].subfile)->line_vector;
|
||
|
||
/* Line numbers are not necessarily ordered. xlc compilation will
|
||
put static function to the end. */
|
||
|
||
lineTb = arrange_linetable (lv);
|
||
|
||
push_subfile ();
|
||
|
||
/* For the same include file, we might want to have more than one
|
||
subfile. This happens if we have something like:
|
||
|
||
......
|
||
#include "foo.h"
|
||
......
|
||
#include "foo.h"
|
||
......
|
||
|
||
while foo.h including code in it. (stupid but possible)
|
||
Since start_subfile() looks at the name and uses an
|
||
existing one if finds, we need to provide a fake name and
|
||
fool it. */
|
||
|
||
#if 0
|
||
start_subfile (inclTable[ii].name);
|
||
#else
|
||
{
|
||
/* Pick a fake name that will produce the same results as this
|
||
one when passed to deduce_language_from_filename. Kludge on
|
||
top of kludge. */
|
||
char *fakename = strrchr (inclTable[ii].name, '.');
|
||
|
||
if (fakename == NULL)
|
||
fakename = " ?";
|
||
start_subfile (fakename);
|
||
xfree (current_subfile->name);
|
||
}
|
||
current_subfile->name = xstrdup (inclTable[ii].name);
|
||
#endif
|
||
|
||
if (lv == lineTb)
|
||
{
|
||
current_subfile->line_vector =
|
||
(struct linetable *) xrealloc
|
||
(lv, (sizeof (struct linetable)
|
||
+ lv->nitems * sizeof (struct linetable_entry)));
|
||
|
||
}
|
||
else
|
||
{
|
||
xfree (lv);
|
||
current_subfile->line_vector = lineTb;
|
||
}
|
||
|
||
current_subfile->line_vector_length =
|
||
current_subfile->line_vector->nitems;
|
||
start_subfile (pop_subfile ());
|
||
}
|
||
}
|
||
|
||
return_after_cleanup:
|
||
|
||
/* We don't want to keep alloc/free'ing the global include file table. */
|
||
inclIndx = 0;
|
||
}
|
||
|
||
static void
|
||
aix_process_linenos (struct objfile *objfile)
|
||
{
|
||
/* There is no linenos to read if there are only dwarf info. */
|
||
if (this_symtab_psymtab == NULL)
|
||
return;
|
||
|
||
/* Process line numbers and enter them into line vector. */
|
||
process_linenos (last_source_start_addr, cur_src_end_addr);
|
||
}
|
||
|
||
|
||
/* Enter a given range of lines into the line vector.
|
||
can be called in the following two ways:
|
||
enter_line_range (subfile, beginoffset, endoffset,
|
||
startaddr, 0, firstLine) or
|
||
enter_line_range (subfile, beginoffset, 0,
|
||
startaddr, endaddr, firstLine)
|
||
|
||
endoffset points to the last line table entry that we should pay
|
||
attention to. */
|
||
|
||
static void
|
||
enter_line_range (struct subfile *subfile, unsigned beginoffset,
|
||
unsigned endoffset, /* offsets to line table */
|
||
CORE_ADDR startaddr, /* offsets to line table */
|
||
CORE_ADDR endaddr, unsigned *firstLine)
|
||
{
|
||
struct objfile *objfile = this_symtab_objfile;
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
unsigned int curoffset;
|
||
CORE_ADDR addr;
|
||
void *ext_lnno;
|
||
struct internal_lineno int_lnno;
|
||
unsigned int limit_offset;
|
||
bfd *abfd;
|
||
int linesz;
|
||
|
||
if (endoffset == 0 && startaddr == 0 && endaddr == 0)
|
||
return;
|
||
curoffset = beginoffset;
|
||
limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
|
||
|
||
if (endoffset != 0)
|
||
{
|
||
if (endoffset >= limit_offset)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("Bad line table offset in C_EINCL directive"));
|
||
return;
|
||
}
|
||
limit_offset = endoffset;
|
||
}
|
||
else
|
||
limit_offset -= 1;
|
||
|
||
abfd = objfile->obfd;
|
||
linesz = coff_data (abfd)->local_linesz;
|
||
ext_lnno = alloca (linesz);
|
||
|
||
while (curoffset <= limit_offset)
|
||
{
|
||
bfd_seek (abfd, curoffset, SEEK_SET);
|
||
bfd_bread (ext_lnno, linesz, abfd);
|
||
bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
|
||
|
||
/* Find the address this line represents. */
|
||
addr = (int_lnno.l_lnno
|
||
? int_lnno.l_addr.l_paddr
|
||
: read_symbol_nvalue (int_lnno.l_addr.l_symndx));
|
||
addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
|
||
|
||
if (addr < startaddr || (endaddr && addr >= endaddr))
|
||
return;
|
||
|
||
if (int_lnno.l_lnno == 0)
|
||
{
|
||
*firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
|
||
record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr));
|
||
--(*firstLine);
|
||
}
|
||
else
|
||
record_line (subfile, *firstLine + int_lnno.l_lnno,
|
||
gdbarch_addr_bits_remove (gdbarch, addr));
|
||
curoffset += linesz;
|
||
}
|
||
}
|
||
|
||
|
||
/* Save the vital information for use when closing off the current file.
|
||
NAME is the file name the symbols came from, START_ADDR is the first
|
||
text address for the file, and SIZE is the number of bytes of text. */
|
||
|
||
#define complete_symtab(name, start_addr) { \
|
||
set_last_source_file (name); \
|
||
last_source_start_addr = start_addr; \
|
||
}
|
||
|
||
|
||
/* Refill the symbol table input buffer
|
||
and set the variables that control fetching entries from it.
|
||
Reports an error if no data available.
|
||
This function can read past the end of the symbol table
|
||
(into the string table) but this does no harm. */
|
||
|
||
/* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
|
||
|
||
Creation of all new minimal symbols should go through this function
|
||
rather than calling the various prim_record_[...] functions in order
|
||
to make sure that all symbol addresses get properly relocated.
|
||
|
||
Arguments are:
|
||
|
||
NAME - the symbol's name (but if NAME starts with a period, that
|
||
leading period is discarded).
|
||
ADDRESS - the symbol's address, prior to relocation. This function
|
||
relocates the address before recording the minimal symbol.
|
||
MS_TYPE - the symbol's type.
|
||
N_SCNUM - the symbol's XCOFF section number.
|
||
OBJFILE - the objfile associated with the minimal symbol. */
|
||
|
||
static void
|
||
record_minimal_symbol (const char *name, CORE_ADDR address,
|
||
enum minimal_symbol_type ms_type,
|
||
int n_scnum,
|
||
struct objfile *objfile)
|
||
{
|
||
|
||
if (name[0] == '.')
|
||
++name;
|
||
|
||
prim_record_minimal_symbol_and_info (name, address, ms_type,
|
||
secnum_to_section (n_scnum, objfile),
|
||
objfile);
|
||
}
|
||
|
||
/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
|
||
nested. At any given time, a symbol can only be in one static block.
|
||
This is the base address of current static block, zero if non exists. */
|
||
|
||
static int static_block_base = 0;
|
||
|
||
/* Section number for the current static block. */
|
||
|
||
static int static_block_section = -1;
|
||
|
||
/* true if space for symbol name has been allocated. */
|
||
|
||
static int symname_alloced = 0;
|
||
|
||
/* Next symbol to read. Pointer into raw seething symbol table. */
|
||
|
||
static char *raw_symbol;
|
||
|
||
/* This is the function which stabsread.c calls to get symbol
|
||
continuations. */
|
||
|
||
static char *
|
||
xcoff_next_symbol_text (struct objfile *objfile)
|
||
{
|
||
struct internal_syment symbol;
|
||
char *retval;
|
||
|
||
/* FIXME: is this the same as the passed arg? */
|
||
if (this_symtab_objfile)
|
||
objfile = this_symtab_objfile;
|
||
|
||
bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
|
||
if (symbol.n_zeroes)
|
||
{
|
||
complaint (&symfile_complaints, _("Unexpected symbol continuation"));
|
||
|
||
/* Return something which points to '\0' and hope the symbol reading
|
||
code does something reasonable. */
|
||
retval = "";
|
||
}
|
||
else if (symbol.n_sclass & 0x80)
|
||
{
|
||
retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
|
||
raw_symbol += coff_data (objfile->obfd)->local_symesz;
|
||
++symnum;
|
||
}
|
||
else
|
||
{
|
||
complaint (&symfile_complaints, _("Unexpected symbol continuation"));
|
||
|
||
/* Return something which points to '\0' and hope the symbol reading
|
||
code does something reasonable. */
|
||
retval = "";
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
/* Read symbols for a given partial symbol table. */
|
||
|
||
static void
|
||
read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
char *raw_auxptr; /* Pointer to first raw aux entry for sym. */
|
||
struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
|
||
char *strtbl = xcoff->strtbl;
|
||
char *debugsec = xcoff->debugsec;
|
||
const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF";
|
||
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux;
|
||
struct coff_symbol cs[1];
|
||
CORE_ADDR file_start_addr = 0;
|
||
CORE_ADDR file_end_addr = 0;
|
||
|
||
int next_file_symnum = -1;
|
||
unsigned int max_symnum;
|
||
int just_started = 1;
|
||
int depth = 0;
|
||
CORE_ADDR fcn_start_addr = 0;
|
||
|
||
struct coff_symbol fcn_stab_saved = { 0 };
|
||
|
||
/* fcn_cs_saved is global because process_xcoff_symbol needs it. */
|
||
union internal_auxent fcn_aux_saved = main_aux;
|
||
struct context_stack *newobj;
|
||
|
||
char *filestring = " _start_ "; /* Name of the current file. */
|
||
|
||
const char *last_csect_name; /* Last seen csect's name. */
|
||
|
||
this_symtab_psymtab = pst;
|
||
this_symtab_objfile = objfile;
|
||
|
||
/* Get the appropriate COFF "constants" related to the file we're
|
||
handling. */
|
||
local_symesz = coff_data (abfd)->local_symesz;
|
||
|
||
set_last_source_file (NULL);
|
||
last_csect_name = 0;
|
||
|
||
start_stabs ();
|
||
start_symtab (objfile, filestring, (char *) NULL, file_start_addr);
|
||
record_debugformat (debugfmt);
|
||
symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
|
||
max_symnum =
|
||
symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
|
||
first_object_file_end = 0;
|
||
|
||
raw_symbol = xcoff->symtbl + symnum * local_symesz;
|
||
|
||
while (symnum < max_symnum)
|
||
{
|
||
QUIT; /* make this command interruptable. */
|
||
|
||
/* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
|
||
/* read one symbol into `cs' structure. After processing the
|
||
whole symbol table, only string table will be kept in memory,
|
||
symbol table and debug section of xcoff will be freed. Thus
|
||
we can mark symbols with names in string table as
|
||
`alloced'. */
|
||
{
|
||
int ii;
|
||
|
||
/* Swap and align the symbol into a reasonable C structure. */
|
||
bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
|
||
|
||
cs->c_symnum = symnum;
|
||
cs->c_naux = symbol->n_numaux;
|
||
if (symbol->n_zeroes)
|
||
{
|
||
symname_alloced = 0;
|
||
/* We must use the original, unswapped, name here so the name field
|
||
pointed to by cs->c_name will persist throughout xcoffread. If
|
||
we use the new field, it gets overwritten for each symbol. */
|
||
cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
|
||
/* If it's exactly E_SYMNMLEN characters long it isn't
|
||
'\0'-terminated. */
|
||
if (cs->c_name[E_SYMNMLEN - 1] != '\0')
|
||
{
|
||
char *p;
|
||
|
||
p = (char *) obstack_alloc (&objfile->objfile_obstack,
|
||
E_SYMNMLEN + 1);
|
||
strncpy (p, cs->c_name, E_SYMNMLEN);
|
||
p[E_SYMNMLEN] = '\0';
|
||
cs->c_name = p;
|
||
symname_alloced = 1;
|
||
}
|
||
}
|
||
else if (symbol->n_sclass & 0x80)
|
||
{
|
||
cs->c_name = debugsec + symbol->n_offset;
|
||
symname_alloced = 0;
|
||
}
|
||
else
|
||
{
|
||
/* in string table */
|
||
cs->c_name = strtbl + (int) symbol->n_offset;
|
||
symname_alloced = 1;
|
||
}
|
||
cs->c_value = symbol->n_value;
|
||
cs->c_sclass = symbol->n_sclass;
|
||
cs->c_secnum = symbol->n_scnum;
|
||
cs->c_type = (unsigned) symbol->n_type;
|
||
|
||
raw_symbol += local_symesz;
|
||
++symnum;
|
||
|
||
/* Save addr of first aux entry. */
|
||
raw_auxptr = raw_symbol;
|
||
|
||
/* Skip all the auxents associated with this symbol. */
|
||
for (ii = symbol->n_numaux; ii; --ii)
|
||
{
|
||
raw_symbol += coff_data (abfd)->local_auxesz;
|
||
++symnum;
|
||
}
|
||
}
|
||
|
||
/* if symbol name starts with ".$" or "$", ignore it. */
|
||
if (cs->c_name[0] == '$'
|
||
|| (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
|
||
continue;
|
||
|
||
if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
|
||
{
|
||
if (get_last_source_file ())
|
||
{
|
||
pst->compunit_symtab = end_symtab (cur_src_end_addr,
|
||
SECT_OFF_TEXT (objfile));
|
||
end_stabs ();
|
||
}
|
||
|
||
start_stabs ();
|
||
start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0);
|
||
record_debugformat (debugfmt);
|
||
cur_src_end_addr = first_object_file_end;
|
||
/* Done with all files, everything from here on is globals. */
|
||
}
|
||
|
||
if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
|
||
&& cs->c_naux == 1)
|
||
{
|
||
/* Dealing with a symbol with a csect entry. */
|
||
|
||
#define CSECT(PP) ((PP)->x_csect)
|
||
#define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
|
||
#define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
|
||
#define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
|
||
#define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
|
||
|
||
/* Convert the auxent to something we can access. */
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
|
||
switch (CSECT_SMTYP (&main_aux))
|
||
{
|
||
|
||
case XTY_ER:
|
||
/* Ignore all external references. */
|
||
continue;
|
||
|
||
case XTY_SD:
|
||
/* A section description. */
|
||
{
|
||
switch (CSECT_SCLAS (&main_aux))
|
||
{
|
||
|
||
case XMC_PR:
|
||
{
|
||
|
||
/* A program csect is seen. We have to allocate one
|
||
symbol table for each program csect. Normally gdb
|
||
prefers one symtab for each source file. In case
|
||
of AIX, one source file might include more than one
|
||
[PR] csect, and they don't have to be adjacent in
|
||
terms of the space they occupy in memory. Thus, one
|
||
single source file might get fragmented in the
|
||
memory and gdb's file start and end address
|
||
approach does not work! GCC (and I think xlc) seem
|
||
to put all the code in the unnamed program csect. */
|
||
|
||
if (last_csect_name)
|
||
{
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
|
||
end_stabs ();
|
||
start_stabs ();
|
||
/* Give all csects for this source file the same
|
||
name. */
|
||
start_symtab (objfile, filestring, NULL,
|
||
(CORE_ADDR) 0);
|
||
record_debugformat (debugfmt);
|
||
}
|
||
|
||
/* If this is the very first csect seen,
|
||
basically `__start'. */
|
||
if (just_started)
|
||
{
|
||
first_object_file_end
|
||
= cs->c_value + CSECT_LEN (&main_aux);
|
||
just_started = 0;
|
||
}
|
||
|
||
file_start_addr =
|
||
cs->c_value + ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
|
||
|
||
if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@'))
|
||
last_csect_name = cs->c_name;
|
||
}
|
||
continue;
|
||
|
||
/* All other symbols are put into the minimal symbol
|
||
table only. */
|
||
|
||
case XMC_RW:
|
||
continue;
|
||
|
||
case XMC_TC0:
|
||
continue;
|
||
|
||
case XMC_TC:
|
||
continue;
|
||
|
||
default:
|
||
/* Ignore the symbol. */
|
||
continue;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case XTY_LD:
|
||
|
||
switch (CSECT_SCLAS (&main_aux))
|
||
{
|
||
case XMC_PR:
|
||
/* a function entry point. */
|
||
function_entry_point:
|
||
|
||
fcn_start_addr = cs->c_value;
|
||
|
||
/* save the function header info, which will be used
|
||
when `.bf' is seen. */
|
||
fcn_cs_saved = *cs;
|
||
fcn_aux_saved = main_aux;
|
||
continue;
|
||
|
||
case XMC_GL:
|
||
/* shared library function trampoline code entry point. */
|
||
continue;
|
||
|
||
case XMC_DS:
|
||
/* The symbols often have the same names as debug symbols for
|
||
functions, and confuse lookup_symbol. */
|
||
continue;
|
||
|
||
default:
|
||
/* xlc puts each variable in a separate csect, so we get
|
||
an XTY_SD for each variable. But gcc puts several
|
||
variables in a csect, so that each variable only gets
|
||
an XTY_LD. This will typically be XMC_RW; I suspect
|
||
XMC_RO and XMC_BS might be possible too.
|
||
These variables are put in the minimal symbol table
|
||
only. */
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case XTY_CM:
|
||
/* Common symbols are put into the minimal symbol table only. */
|
||
continue;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* If explicitly specified as a function, treat is as one. This check
|
||
evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
|
||
after the above CSECT check. */
|
||
if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
|
||
{
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
goto function_entry_point;
|
||
}
|
||
|
||
switch (cs->c_sclass)
|
||
{
|
||
case C_FILE:
|
||
|
||
/* c_value field contains symnum of next .file entry in table
|
||
or symnum of first global after last .file. */
|
||
|
||
next_file_symnum = cs->c_value;
|
||
|
||
/* Complete symbol table for last object file containing
|
||
debugging information. */
|
||
|
||
/* Whether or not there was a csect in the previous file, we
|
||
have to call `end_stabs' and `start_stabs' to reset
|
||
type_vector, line_vector, etc. structures. */
|
||
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
|
||
end_stabs ();
|
||
|
||
/* XCOFF, according to the AIX 3.2 documentation, puts the
|
||
filename in cs->c_name. But xlc 1.3.0.2 has decided to
|
||
do things the standard COFF way and put it in the auxent.
|
||
We use the auxent if the symbol is ".file" and an auxent
|
||
exists, otherwise use the symbol itself. Simple
|
||
enough. */
|
||
if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
|
||
{
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
filestring = coff_getfilename (&main_aux, objfile);
|
||
}
|
||
else
|
||
filestring = cs->c_name;
|
||
|
||
start_stabs ();
|
||
start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0);
|
||
record_debugformat (debugfmt);
|
||
last_csect_name = 0;
|
||
|
||
/* reset file start and end addresses. A compilation unit
|
||
with no text (only data) should have zero file
|
||
boundaries. */
|
||
file_start_addr = file_end_addr = 0;
|
||
break;
|
||
|
||
case C_FUN:
|
||
fcn_stab_saved = *cs;
|
||
break;
|
||
|
||
case C_FCN:
|
||
if (strcmp (cs->c_name, ".bf") == 0)
|
||
{
|
||
CORE_ADDR off = ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
|
||
within_function = 1;
|
||
|
||
newobj = push_context (0, fcn_start_addr + off);
|
||
|
||
newobj->name = define_symbol
|
||
(fcn_cs_saved.c_value + off,
|
||
fcn_stab_saved.c_name, 0, 0, objfile);
|
||
if (newobj->name != NULL)
|
||
SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile);
|
||
}
|
||
else if (strcmp (cs->c_name, ".ef") == 0)
|
||
{
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
|
||
/* The value of .ef is the address of epilogue code;
|
||
not useful for gdb. */
|
||
/* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
|
||
contains number of lines to '}' */
|
||
|
||
if (context_stack_depth <= 0)
|
||
{ /* We attempted to pop an empty context stack. */
|
||
ef_complaint (cs->c_symnum);
|
||
within_function = 0;
|
||
break;
|
||
}
|
||
newobj = pop_context ();
|
||
/* Stack must be empty now. */
|
||
if (context_stack_depth > 0 || newobj == NULL)
|
||
{
|
||
ef_complaint (cs->c_symnum);
|
||
within_function = 0;
|
||
break;
|
||
}
|
||
|
||
finish_block (newobj->name, &local_symbols, newobj->old_blocks,
|
||
NULL, newobj->start_addr,
|
||
(fcn_cs_saved.c_value
|
||
+ fcn_aux_saved.x_sym.x_misc.x_fsize
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))));
|
||
within_function = 0;
|
||
}
|
||
break;
|
||
|
||
case C_BSTAT:
|
||
/* Begin static block. */
|
||
{
|
||
struct internal_syment symbol;
|
||
|
||
read_symbol (&symbol, cs->c_value);
|
||
static_block_base = symbol.n_value;
|
||
static_block_section =
|
||
secnum_to_section (symbol.n_scnum, objfile);
|
||
}
|
||
break;
|
||
|
||
case C_ESTAT:
|
||
/* End of static block. */
|
||
static_block_base = 0;
|
||
static_block_section = -1;
|
||
break;
|
||
|
||
case C_ARG:
|
||
case C_REGPARM:
|
||
case C_REG:
|
||
case C_TPDEF:
|
||
case C_STRTAG:
|
||
case C_UNTAG:
|
||
case C_ENTAG:
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("Unrecognized storage class %d."),
|
||
cs->c_sclass);
|
||
}
|
||
break;
|
||
|
||
case C_LABEL:
|
||
case C_NULL:
|
||
/* Ignore these. */
|
||
break;
|
||
|
||
case C_HIDEXT:
|
||
case C_STAT:
|
||
break;
|
||
|
||
case C_BINCL:
|
||
/* beginning of include file */
|
||
/* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
|
||
order. Thus, when wee see them, we might not know enough info
|
||
to process them. Thus, we'll be saving them into a table
|
||
(inclTable) and postpone their processing. */
|
||
|
||
record_include_begin (cs);
|
||
break;
|
||
|
||
case C_EINCL:
|
||
/* End of include file. */
|
||
/* See the comment after case C_BINCL. */
|
||
record_include_end (cs);
|
||
break;
|
||
|
||
case C_BLOCK:
|
||
if (strcmp (cs->c_name, ".bb") == 0)
|
||
{
|
||
depth++;
|
||
newobj = push_context (depth,
|
||
(cs->c_value
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))));
|
||
}
|
||
else if (strcmp (cs->c_name, ".eb") == 0)
|
||
{
|
||
if (context_stack_depth <= 0)
|
||
{ /* We attempted to pop an empty context stack. */
|
||
eb_complaint (cs->c_symnum);
|
||
break;
|
||
}
|
||
newobj = pop_context ();
|
||
if (depth-- != newobj->depth)
|
||
{
|
||
eb_complaint (cs->c_symnum);
|
||
break;
|
||
}
|
||
if (local_symbols && context_stack_depth > 0)
|
||
{
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (newobj->name, &local_symbols,
|
||
newobj->old_blocks, NULL,
|
||
newobj->start_addr,
|
||
(cs->c_value
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))));
|
||
}
|
||
local_symbols = newobj->locals;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
process_xcoff_symbol (cs, objfile);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (get_last_source_file ())
|
||
{
|
||
struct compunit_symtab *cust;
|
||
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile));
|
||
/* When reading symbols for the last C_FILE of the objfile, try
|
||
to make sure that we set pst->compunit_symtab to the symtab for the
|
||
file, not to the _globals_ symtab. I'm not sure whether this
|
||
actually works right or when/if it comes up. */
|
||
if (pst->compunit_symtab == NULL)
|
||
pst->compunit_symtab = cust;
|
||
end_stabs ();
|
||
}
|
||
}
|
||
|
||
#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
|
||
(SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
|
||
*(SYMBOL2) = *(SYMBOL1);
|
||
|
||
|
||
#define SYMNAME_ALLOC(NAME, ALLOCED) \
|
||
((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
|
||
(NAME), strlen (NAME)))
|
||
|
||
|
||
/* process one xcoff symbol. */
|
||
|
||
static struct symbol *
|
||
process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile)
|
||
{
|
||
struct symbol onesymbol;
|
||
struct symbol *sym = &onesymbol;
|
||
struct symbol *sym2 = NULL;
|
||
char *name, *pp;
|
||
|
||
int sec;
|
||
CORE_ADDR off;
|
||
|
||
if (cs->c_secnum < 0)
|
||
{
|
||
/* The value is a register number, offset within a frame, etc.,
|
||
and does not get relocated. */
|
||
off = 0;
|
||
sec = -1;
|
||
}
|
||
else
|
||
{
|
||
sec = secnum_to_section (cs->c_secnum, objfile);
|
||
off = ANOFFSET (objfile->section_offsets, sec);
|
||
}
|
||
|
||
name = cs->c_name;
|
||
if (name[0] == '.')
|
||
++name;
|
||
|
||
initialize_objfile_symbol (sym);
|
||
|
||
/* default assumptions */
|
||
SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
|
||
SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
|
||
if (ISFCN (cs->c_type))
|
||
{
|
||
/* At this point, we don't know the type of the function. This
|
||
will be patched with the type from its stab entry later on in
|
||
patch_block_stabs (), unless the file was compiled without -g. */
|
||
|
||
SYMBOL_SET_LINKAGE_NAME (sym, ((const char *)
|
||
SYMNAME_ALLOC (name, symname_alloced)));
|
||
SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol;
|
||
|
||
SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
|
||
SYMBOL_DUP (sym, sym2);
|
||
|
||
if (cs->c_sclass == C_EXT)
|
||
add_symbol_to_list (sym2, &global_symbols);
|
||
else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
|
||
add_symbol_to_list (sym2, &file_symbols);
|
||
}
|
||
else
|
||
{
|
||
/* In case we can't figure out the type, provide default. */
|
||
SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol;
|
||
|
||
switch (cs->c_sclass)
|
||
{
|
||
#if 0
|
||
/* The values of functions and global symbols are now resolved
|
||
via the global_sym_chain in stabsread.c. */
|
||
case C_FUN:
|
||
if (fcn_cs_saved.c_sclass == C_EXT)
|
||
add_stab_to_list (name, &global_stabs);
|
||
else
|
||
add_stab_to_list (name, &file_stabs);
|
||
break;
|
||
|
||
case C_GSYM:
|
||
add_stab_to_list (name, &global_stabs);
|
||
break;
|
||
#endif
|
||
|
||
case C_BCOMM:
|
||
common_block_start (cs->c_name, objfile);
|
||
break;
|
||
|
||
case C_ECOMM:
|
||
common_block_end (objfile);
|
||
break;
|
||
|
||
default:
|
||
complaint (&symfile_complaints, _("Unexpected storage class: %d"),
|
||
cs->c_sclass);
|
||
/* FALLTHROUGH */
|
||
|
||
case C_DECL:
|
||
case C_PSYM:
|
||
case C_RPSYM:
|
||
case C_ECOML:
|
||
case C_LSYM:
|
||
case C_RSYM:
|
||
case C_GSYM:
|
||
|
||
{
|
||
sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
|
||
if (sym != NULL)
|
||
{
|
||
SYMBOL_SECTION (sym) = sec;
|
||
}
|
||
return sym;
|
||
}
|
||
|
||
case C_STSYM:
|
||
|
||
/* For xlc (not GCC), the 'V' symbol descriptor is used for
|
||
all statics and we need to distinguish file-scope versus
|
||
function-scope using within_function. We do this by
|
||
changing the string we pass to define_symbol to use 'S'
|
||
where we need to, which is not necessarily super-clean,
|
||
but seems workable enough. */
|
||
|
||
if (*name == ':')
|
||
return NULL;
|
||
|
||
pp = strchr (name, ':');
|
||
if (pp == NULL)
|
||
return NULL;
|
||
|
||
++pp;
|
||
if (*pp == 'V' && !within_function)
|
||
*pp = 'S';
|
||
sym = define_symbol ((cs->c_value
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
static_block_section)),
|
||
cs->c_name, 0, 0, objfile);
|
||
if (sym != NULL)
|
||
{
|
||
SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
|
||
SYMBOL_SECTION (sym) = static_block_section;
|
||
}
|
||
return sym;
|
||
|
||
}
|
||
}
|
||
return sym2;
|
||
}
|
||
|
||
/* Extract the file name from the aux entry of a C_FILE symbol.
|
||
Result is in static storage and is only good for temporary use. */
|
||
|
||
static char *
|
||
coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
|
||
{
|
||
static char buffer[BUFSIZ];
|
||
|
||
if (aux_entry->x_file.x_n.x_zeroes == 0)
|
||
strcpy (buffer, (XCOFF_DATA (objfile)->strtbl
|
||
+ aux_entry->x_file.x_n.x_offset));
|
||
else
|
||
{
|
||
strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
|
||
buffer[FILNMLEN] = '\0';
|
||
}
|
||
return (buffer);
|
||
}
|
||
|
||
/* Set *SYMBOL to symbol number symno in symtbl. */
|
||
static void
|
||
read_symbol (struct internal_syment *symbol, int symno)
|
||
{
|
||
struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile);
|
||
int nsyms = xcoff->symtbl_num_syms;
|
||
char *stbl = xcoff->symtbl;
|
||
|
||
if (symno < 0 || symno >= nsyms)
|
||
{
|
||
complaint (&symfile_complaints, _("Invalid symbol offset"));
|
||
symbol->n_value = 0;
|
||
symbol->n_scnum = -1;
|
||
return;
|
||
}
|
||
bfd_coff_swap_sym_in (this_symtab_objfile->obfd,
|
||
stbl + (symno * local_symesz),
|
||
symbol);
|
||
}
|
||
|
||
/* Get value corresponding to symbol number symno in symtbl. */
|
||
|
||
static CORE_ADDR
|
||
read_symbol_nvalue (int symno)
|
||
{
|
||
struct internal_syment symbol[1];
|
||
|
||
read_symbol (symbol, symno);
|
||
return symbol->n_value;
|
||
}
|
||
|
||
|
||
/* Find the address of the function corresponding to symno, where
|
||
symno is the symbol pointed to by the linetable. */
|
||
|
||
static int
|
||
read_symbol_lineno (int symno)
|
||
{
|
||
struct objfile *objfile = this_symtab_objfile;
|
||
int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd);
|
||
|
||
struct coff_symfile_info *info = XCOFF_DATA (objfile);
|
||
int nsyms = info->symtbl_num_syms;
|
||
char *stbl = info->symtbl;
|
||
char *strtbl = info->strtbl;
|
||
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux[1];
|
||
|
||
if (symno < 0)
|
||
{
|
||
bf_notfound_complaint ();
|
||
return 0;
|
||
}
|
||
|
||
/* Note that just searching for a short distance (e.g. 50 symbols)
|
||
is not enough, at least in the following case.
|
||
|
||
.extern foo
|
||
[many .stabx entries]
|
||
[a few functions, referring to foo]
|
||
.globl foo
|
||
.bf
|
||
|
||
What happens here is that the assembler moves the .stabx entries
|
||
to right before the ".bf" for foo, but the symbol for "foo" is before
|
||
all the stabx entries. See PR gdb/2222. */
|
||
|
||
/* Maintaining a table of .bf entries might be preferable to this search.
|
||
If I understand things correctly it would need to be done only for
|
||
the duration of a single psymtab to symtab conversion. */
|
||
while (symno < nsyms)
|
||
{
|
||
bfd_coff_swap_sym_in (symfile_bfd,
|
||
stbl + (symno * local_symesz), symbol);
|
||
if (symbol->n_sclass == C_FCN)
|
||
{
|
||
char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
|
||
|
||
if (strcmp (name, ".bf") == 0)
|
||
goto gotit;
|
||
}
|
||
symno += symbol->n_numaux + 1;
|
||
}
|
||
|
||
bf_notfound_complaint ();
|
||
return 0;
|
||
|
||
gotit:
|
||
/* Take aux entry and return its lineno. */
|
||
symno++;
|
||
bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
|
||
symbol->n_type, symbol->n_sclass,
|
||
0, symbol->n_numaux, main_aux);
|
||
|
||
return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
|
||
}
|
||
|
||
/* Support for line number handling. */
|
||
|
||
/* This function is called for every section; it finds the outer limits
|
||
* of the line table (minimum and maximum file offset) so that the
|
||
* mainline code can read the whole thing for efficiency.
|
||
*/
|
||
static void
|
||
find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo)
|
||
{
|
||
struct coff_symfile_info *info;
|
||
int size, count;
|
||
file_ptr offset, maxoff;
|
||
|
||
count = asect->lineno_count;
|
||
|
||
if (strcmp (asect->name, ".text") != 0 || count == 0)
|
||
return;
|
||
|
||
size = count * coff_data (abfd)->local_linesz;
|
||
info = (struct coff_symfile_info *) vpinfo;
|
||
offset = asect->line_filepos;
|
||
maxoff = offset + size;
|
||
|
||
if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
|
||
info->min_lineno_offset = offset;
|
||
|
||
if (maxoff > info->max_lineno_offset)
|
||
info->max_lineno_offset = maxoff;
|
||
}
|
||
|
||
static void
|
||
xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst)
|
||
{
|
||
struct cleanup *old_chain;
|
||
int i;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered
|
||
(gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
/* Read in all partial symtabs on which this one is dependent. */
|
||
for (i = 0; i < pst->number_of_dependencies; i++)
|
||
if (!pst->dependencies[i]->readin)
|
||
{
|
||
/* Inform about additional files that need to be read in. */
|
||
if (info_verbose)
|
||
{
|
||
fputs_filtered (" ", gdb_stdout);
|
||
wrap_here ("");
|
||
fputs_filtered ("and ", gdb_stdout);
|
||
wrap_here ("");
|
||
printf_filtered ("%s...", pst->dependencies[i]->filename);
|
||
wrap_here (""); /* Flush output */
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]);
|
||
}
|
||
|
||
if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
|
||
{
|
||
/* Init stuff necessary for reading in symbols. */
|
||
stabsread_init ();
|
||
buildsym_init ();
|
||
old_chain = make_cleanup (really_free_pendings, 0);
|
||
|
||
read_xcoff_symtab (objfile, pst);
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
pst->readin = 1;
|
||
}
|
||
|
||
/* Read in all of the symbols for a given psymtab for real.
|
||
Be verbose about it if the user wants that. SELF is not NULL. */
|
||
|
||
static void
|
||
xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile)
|
||
{
|
||
if (self->readin)
|
||
{
|
||
fprintf_unfiltered
|
||
(gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
self->filename);
|
||
return;
|
||
}
|
||
|
||
if (((struct symloc *) self->read_symtab_private)->numsyms != 0
|
||
|| self->number_of_dependencies)
|
||
{
|
||
/* Print the message now, before reading the string table,
|
||
to avoid disconcerting pauses. */
|
||
if (info_verbose)
|
||
{
|
||
printf_filtered ("Reading in symbols for %s...", self->filename);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
next_symbol_text_func = xcoff_next_symbol_text;
|
||
|
||
xcoff_psymtab_to_symtab_1 (objfile, self);
|
||
|
||
/* Match with global symbols. This only needs to be done once,
|
||
after all of the symtabs and dependencies have been read in. */
|
||
scan_file_globals (objfile);
|
||
|
||
/* Finish up the debug error message. */
|
||
if (info_verbose)
|
||
printf_filtered ("done.\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
xcoff_new_init (struct objfile *objfile)
|
||
{
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
}
|
||
|
||
/* Do initialization in preparation for reading symbols from OBJFILE.
|
||
|
||
We will only be called if this is an XCOFF or XCOFF-like file.
|
||
BFD handles figuring out the format of the file, and code in symfile.c
|
||
uses BFD's determination to vector to us. */
|
||
|
||
static void
|
||
xcoff_symfile_init (struct objfile *objfile)
|
||
{
|
||
struct coff_symfile_info *xcoff;
|
||
|
||
/* Allocate struct to keep track of the symfile. */
|
||
xcoff = XNEW (struct coff_symfile_info);
|
||
set_objfile_data (objfile, xcoff_objfile_data_key, xcoff);
|
||
|
||
/* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
|
||
find this causes a significant slowdown in gdb then we could
|
||
set it in the debug symbol readers only when necessary. */
|
||
objfile->flags |= OBJF_REORDERED;
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
xcoff_symfile_finish (struct objfile *objfile)
|
||
{
|
||
/* Start with a fresh include table for the next objfile. */
|
||
if (inclTable)
|
||
{
|
||
xfree (inclTable);
|
||
inclTable = NULL;
|
||
}
|
||
inclIndx = inclLength = inclDepth = 0;
|
||
|
||
dwarf2_free_objfile (objfile);
|
||
}
|
||
|
||
|
||
static void
|
||
init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
|
||
{
|
||
long length;
|
||
int val;
|
||
unsigned char lengthbuf[4];
|
||
char *strtbl;
|
||
struct coff_symfile_info *xcoff = XCOFF_DATA (objfile);
|
||
|
||
xcoff->strtbl = NULL;
|
||
|
||
if (bfd_seek (abfd, offset, SEEK_SET) < 0)
|
||
error (_("cannot seek to string table in %s: %s"),
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
|
||
val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd);
|
||
length = bfd_h_get_32 (abfd, lengthbuf);
|
||
|
||
/* If no string table is needed, then the file may end immediately
|
||
after the symbols. Just return with `strtbl' set to NULL. */
|
||
|
||
if (val != sizeof lengthbuf || length < sizeof lengthbuf)
|
||
return;
|
||
|
||
/* Allocate string table from objfile_obstack. We will need this table
|
||
as long as we have its symbol table around. */
|
||
|
||
strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length);
|
||
xcoff->strtbl = strtbl;
|
||
|
||
/* Copy length buffer, the first byte is usually zero and is
|
||
used for stabs with a name length of zero. */
|
||
memcpy (strtbl, lengthbuf, sizeof lengthbuf);
|
||
if (length == sizeof lengthbuf)
|
||
return;
|
||
|
||
val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd);
|
||
|
||
if (val != length - sizeof lengthbuf)
|
||
error (_("cannot read string table from %s: %s"),
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
if (strtbl[length - 1] != '\0')
|
||
error (_("bad symbol file: string table "
|
||
"does not end with null character"));
|
||
|
||
return;
|
||
}
|
||
|
||
/* If we have not yet seen a function for this psymtab, this is 0. If we
|
||
have seen one, it is the offset in the line numbers of the line numbers
|
||
for the psymtab. */
|
||
static unsigned int first_fun_line_offset;
|
||
|
||
/* Allocate and partially fill a partial symtab. It will be
|
||
completely filled at the end of the symbol list.
|
||
|
||
SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
|
||
is the address relative to which its symbols are (incremental) or 0
|
||
(normal). */
|
||
|
||
static struct partial_symtab *
|
||
xcoff_start_psymtab (struct objfile *objfile,
|
||
const char *filename, int first_symnum,
|
||
struct partial_symbol **global_syms,
|
||
struct partial_symbol **static_syms)
|
||
{
|
||
struct partial_symtab *result =
|
||
start_psymtab_common (objfile,
|
||
filename,
|
||
/* We fill in textlow later. */
|
||
0,
|
||
global_syms, static_syms);
|
||
|
||
result->read_symtab_private =
|
||
XOBNEW (&objfile->objfile_obstack, struct symloc);
|
||
((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
|
||
result->read_symtab = xcoff_read_symtab;
|
||
|
||
/* Deduce the source language from the filename for this psymtab. */
|
||
psymtab_language = deduce_language_from_filename (filename);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Close off the current usage of PST.
|
||
Returns PST, or NULL if the partial symtab was empty and thrown away.
|
||
|
||
CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
|
||
|
||
INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
|
||
are the information for includes and dependencies. */
|
||
|
||
static struct partial_symtab *
|
||
xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst,
|
||
const char **include_list, int num_includes,
|
||
int capping_symbol_number,
|
||
struct partial_symtab **dependency_list,
|
||
int number_dependencies, int textlow_not_set)
|
||
{
|
||
int i;
|
||
|
||
if (capping_symbol_number != -1)
|
||
((struct symloc *) pst->read_symtab_private)->numsyms =
|
||
capping_symbol_number
|
||
- ((struct symloc *) pst->read_symtab_private)->first_symnum;
|
||
((struct symloc *) pst->read_symtab_private)->lineno_off =
|
||
first_fun_line_offset;
|
||
first_fun_line_offset = 0;
|
||
|
||
end_psymtab_common (objfile, pst);
|
||
|
||
pst->number_of_dependencies = number_dependencies;
|
||
if (number_dependencies)
|
||
{
|
||
pst->dependencies = XOBNEWVEC (&objfile->objfile_obstack,
|
||
struct partial_symtab *,
|
||
number_dependencies);
|
||
memcpy (pst->dependencies, dependency_list,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
}
|
||
else
|
||
pst->dependencies = 0;
|
||
|
||
for (i = 0; i < num_includes; i++)
|
||
{
|
||
struct partial_symtab *subpst =
|
||
allocate_psymtab (include_list[i], objfile);
|
||
|
||
subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack,
|
||
sizeof (struct symloc));
|
||
((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
|
||
((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
|
||
subpst->textlow = 0;
|
||
subpst->texthigh = 0;
|
||
|
||
/* We could save slight bits of space by only making one of these,
|
||
shared by the entire set of include files. FIXME-someday. */
|
||
subpst->dependencies =
|
||
XOBNEW (&objfile->objfile_obstack, struct partial_symtab *);
|
||
subpst->dependencies[0] = pst;
|
||
subpst->number_of_dependencies = 1;
|
||
|
||
subpst->globals_offset =
|
||
subpst->n_global_syms =
|
||
subpst->statics_offset =
|
||
subpst->n_static_syms = 0;
|
||
|
||
subpst->readin = 0;
|
||
subpst->compunit_symtab = NULL;
|
||
subpst->read_symtab = pst->read_symtab;
|
||
}
|
||
|
||
if (num_includes == 0
|
||
&& number_dependencies == 0
|
||
&& pst->n_global_syms == 0
|
||
&& pst->n_static_syms == 0)
|
||
{
|
||
/* Throw away this psymtab, it's empty. We can't deallocate it, since
|
||
it is on the obstack, but we can forget to chain it on the list. */
|
||
/* Empty psymtabs happen as a result of header files which don't have
|
||
any symbols in them. There can be a lot of them. */
|
||
|
||
discard_psymtab (objfile, pst);
|
||
|
||
/* Indicate that psymtab was thrown away. */
|
||
pst = NULL;
|
||
}
|
||
return pst;
|
||
}
|
||
|
||
/* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
|
||
*SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
|
||
the symbol and its auxents. */
|
||
|
||
static void
|
||
swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
|
||
const char **name, char **raw, unsigned int *symnump,
|
||
struct objfile *objfile)
|
||
{
|
||
bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
|
||
if (symbol->n_zeroes)
|
||
{
|
||
/* If it's exactly E_SYMNMLEN characters long it isn't
|
||
'\0'-terminated. */
|
||
if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
|
||
{
|
||
/* FIXME: wastes memory for symbols which we don't end up putting
|
||
into the minimal symbols. */
|
||
char *p;
|
||
|
||
p = (char *) obstack_alloc (&objfile->objfile_obstack,
|
||
E_SYMNMLEN + 1);
|
||
strncpy (p, symbol->n_name, E_SYMNMLEN);
|
||
p[E_SYMNMLEN] = '\0';
|
||
*name = p;
|
||
}
|
||
else
|
||
/* Point to the unswapped name as that persists as long as the
|
||
objfile does. */
|
||
*name = ((struct external_syment *) *raw)->e.e_name;
|
||
}
|
||
else if (symbol->n_sclass & 0x80)
|
||
{
|
||
*name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset;
|
||
}
|
||
else
|
||
{
|
||
*name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset;
|
||
}
|
||
++*symnump;
|
||
*raw += coff_data (objfile->obfd)->local_symesz;
|
||
if (symbol->n_numaux > 0)
|
||
{
|
||
bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
|
||
symbol->n_sclass, 0, symbol->n_numaux, aux);
|
||
|
||
*symnump += symbol->n_numaux;
|
||
*raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
|
||
}
|
||
}
|
||
|
||
static void
|
||
function_outside_compilation_unit_complaint (const char *arg1)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("function `%s' appears to be defined "
|
||
"outside of all compilation units"),
|
||
arg1);
|
||
}
|
||
|
||
static void
|
||
scan_xcoff_symtab (struct objfile *objfile)
|
||
{
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
|
||
const char *filestring = NULL;
|
||
|
||
const char *namestring;
|
||
bfd *abfd;
|
||
asection *bfd_sect;
|
||
unsigned int nsyms;
|
||
|
||
/* Current partial symtab */
|
||
struct partial_symtab *pst;
|
||
|
||
/* List of current psymtab's include files. */
|
||
const char **psymtab_include_list;
|
||
int includes_allocated;
|
||
int includes_used;
|
||
|
||
/* Index within current psymtab dependency list. */
|
||
struct partial_symtab **dependency_list;
|
||
int dependencies_used, dependencies_allocated;
|
||
|
||
char *sraw_symbol;
|
||
struct internal_syment symbol;
|
||
union internal_auxent main_aux[5];
|
||
unsigned int ssymnum;
|
||
|
||
const char *last_csect_name = NULL; /* Last seen csect's name and value. */
|
||
CORE_ADDR last_csect_val = 0;
|
||
int last_csect_sec = 0;
|
||
int misc_func_recorded = 0; /* true if any misc. function. */
|
||
int textlow_not_set = 1;
|
||
|
||
pst = (struct partial_symtab *) 0;
|
||
|
||
includes_allocated = 30;
|
||
includes_used = 0;
|
||
psymtab_include_list = (const char **) alloca (includes_allocated *
|
||
sizeof (const char *));
|
||
|
||
dependencies_allocated = 30;
|
||
dependencies_used = 0;
|
||
dependency_list =
|
||
(struct partial_symtab **) alloca (dependencies_allocated *
|
||
sizeof (struct partial_symtab *));
|
||
|
||
set_last_source_file (NULL);
|
||
|
||
abfd = objfile->obfd;
|
||
next_symbol_text_func = xcoff_next_symbol_text;
|
||
|
||
sraw_symbol = XCOFF_DATA (objfile)->symtbl;
|
||
nsyms = XCOFF_DATA (objfile)->symtbl_num_syms;
|
||
ssymnum = 0;
|
||
while (ssymnum < nsyms)
|
||
{
|
||
int sclass;
|
||
|
||
QUIT;
|
||
|
||
bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
|
||
sclass = symbol.n_sclass;
|
||
|
||
switch (sclass)
|
||
{
|
||
case C_EXT:
|
||
case C_HIDEXT:
|
||
{
|
||
/* The CSECT auxent--always the last auxent. */
|
||
union internal_auxent csect_aux;
|
||
unsigned int symnum_before = ssymnum;
|
||
|
||
swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
if (symbol.n_numaux > 1)
|
||
{
|
||
bfd_coff_swap_aux_in
|
||
(objfile->obfd,
|
||
sraw_symbol - coff_data (abfd)->local_symesz,
|
||
symbol.n_type,
|
||
symbol.n_sclass,
|
||
symbol.n_numaux - 1,
|
||
symbol.n_numaux,
|
||
&csect_aux);
|
||
}
|
||
else
|
||
csect_aux = main_aux[0];
|
||
|
||
/* If symbol name starts with ".$" or "$", ignore it. */
|
||
if (namestring[0] == '$'
|
||
|| (namestring[0] == '.' && namestring[1] == '$'))
|
||
break;
|
||
|
||
switch (csect_aux.x_csect.x_smtyp & 0x7)
|
||
{
|
||
case XTY_SD:
|
||
switch (csect_aux.x_csect.x_smclas)
|
||
{
|
||
case XMC_PR:
|
||
if (last_csect_name)
|
||
{
|
||
/* If no misc. function recorded in the last
|
||
seen csect, enter it as a function. This
|
||
will take care of functions like strcmp()
|
||
compiled by xlc. */
|
||
|
||
if (!misc_func_recorded)
|
||
{
|
||
record_minimal_symbol
|
||
(last_csect_name, last_csect_val,
|
||
mst_text, last_csect_sec, objfile);
|
||
misc_func_recorded = 1;
|
||
}
|
||
|
||
if (pst != NULL)
|
||
{
|
||
/* We have to allocate one psymtab for
|
||
each program csect, because their text
|
||
sections need not be adjacent. */
|
||
xcoff_end_psymtab
|
||
(objfile, pst, psymtab_include_list,
|
||
includes_used, symnum_before, dependency_list,
|
||
dependencies_used, textlow_not_set);
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
/* Give all psymtabs for this source file the same
|
||
name. */
|
||
pst = xcoff_start_psymtab
|
||
(objfile,
|
||
filestring,
|
||
symnum_before,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
}
|
||
}
|
||
/* Activate the misc_func_recorded mechanism for
|
||
compiler- and linker-generated CSECTs like ".strcmp"
|
||
and "@FIX1". */
|
||
if (namestring && (namestring[0] == '.'
|
||
|| namestring[0] == '@'))
|
||
{
|
||
last_csect_name = namestring;
|
||
last_csect_val = symbol.n_value;
|
||
last_csect_sec = symbol.n_scnum;
|
||
}
|
||
if (pst != NULL)
|
||
{
|
||
CORE_ADDR highval =
|
||
symbol.n_value + csect_aux.x_csect.x_scnlen.l;
|
||
|
||
if (highval > pst->texthigh)
|
||
pst->texthigh = highval;
|
||
if (pst->textlow == 0 || symbol.n_value < pst->textlow)
|
||
pst->textlow = symbol.n_value;
|
||
}
|
||
misc_func_recorded = 0;
|
||
break;
|
||
|
||
case XMC_RW:
|
||
case XMC_TD:
|
||
/* Data variables are recorded in the minimal symbol
|
||
table, except for section symbols. */
|
||
if (*namestring != '.')
|
||
record_minimal_symbol
|
||
(namestring, symbol.n_value,
|
||
sclass == C_HIDEXT ? mst_file_data : mst_data,
|
||
symbol.n_scnum, objfile);
|
||
break;
|
||
|
||
case XMC_TC0:
|
||
if (toc_offset)
|
||
warning (_("More than one XMC_TC0 symbol found."));
|
||
toc_offset = symbol.n_value;
|
||
|
||
/* Make TOC offset relative to start address of
|
||
section. */
|
||
bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
|
||
if (bfd_sect)
|
||
toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
|
||
break;
|
||
|
||
case XMC_TC:
|
||
/* These symbols tell us where the TOC entry for a
|
||
variable is, not the variable itself. */
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case XTY_LD:
|
||
switch (csect_aux.x_csect.x_smclas)
|
||
{
|
||
case XMC_PR:
|
||
/* A function entry point. */
|
||
|
||
if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
|
||
first_fun_line_offset =
|
||
main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
|
||
|
||
record_minimal_symbol
|
||
(namestring, symbol.n_value,
|
||
sclass == C_HIDEXT ? mst_file_text : mst_text,
|
||
symbol.n_scnum, objfile);
|
||
misc_func_recorded = 1;
|
||
break;
|
||
|
||
case XMC_GL:
|
||
/* shared library function trampoline code entry
|
||
point. */
|
||
|
||
/* record trampoline code entries as
|
||
mst_solib_trampoline symbol. When we lookup mst
|
||
symbols, we will choose mst_text over
|
||
mst_solib_trampoline. */
|
||
record_minimal_symbol
|
||
(namestring, symbol.n_value,
|
||
mst_solib_trampoline, symbol.n_scnum, objfile);
|
||
misc_func_recorded = 1;
|
||
break;
|
||
|
||
case XMC_DS:
|
||
/* The symbols often have the same names as
|
||
debug symbols for functions, and confuse
|
||
lookup_symbol. */
|
||
break;
|
||
|
||
default:
|
||
|
||
/* xlc puts each variable in a separate csect,
|
||
so we get an XTY_SD for each variable. But
|
||
gcc puts several variables in a csect, so
|
||
that each variable only gets an XTY_LD. We
|
||
still need to record them. This will
|
||
typically be XMC_RW; I suspect XMC_RO and
|
||
XMC_BS might be possible too. */
|
||
if (*namestring != '.')
|
||
record_minimal_symbol
|
||
(namestring, symbol.n_value,
|
||
sclass == C_HIDEXT ? mst_file_data : mst_data,
|
||
symbol.n_scnum, objfile);
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case XTY_CM:
|
||
switch (csect_aux.x_csect.x_smclas)
|
||
{
|
||
case XMC_RW:
|
||
case XMC_BS:
|
||
/* Common variables are recorded in the minimal symbol
|
||
table, except for section symbols. */
|
||
if (*namestring != '.')
|
||
record_minimal_symbol
|
||
(namestring, symbol.n_value,
|
||
sclass == C_HIDEXT ? mst_file_bss : mst_bss,
|
||
symbol.n_scnum, objfile);
|
||
break;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
case C_FILE:
|
||
{
|
||
unsigned int symnum_before;
|
||
|
||
symnum_before = ssymnum;
|
||
swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
|
||
/* See if the last csect needs to be recorded. */
|
||
|
||
if (last_csect_name && !misc_func_recorded)
|
||
{
|
||
/* If no misc. function recorded in the last seen csect, enter
|
||
it as a function. This will take care of functions like
|
||
strcmp() compiled by xlc. */
|
||
|
||
record_minimal_symbol (last_csect_name, last_csect_val,
|
||
mst_text, last_csect_sec, objfile);
|
||
misc_func_recorded = 1;
|
||
}
|
||
|
||
if (pst)
|
||
{
|
||
xcoff_end_psymtab (objfile, pst, psymtab_include_list,
|
||
includes_used, symnum_before,
|
||
dependency_list, dependencies_used,
|
||
textlow_not_set);
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
}
|
||
first_fun_line_offset = 0;
|
||
|
||
/* XCOFF, according to the AIX 3.2 documentation, puts the
|
||
filename in cs->c_name. But xlc 1.3.0.2 has decided to
|
||
do things the standard COFF way and put it in the auxent.
|
||
We use the auxent if the symbol is ".file" and an auxent
|
||
exists, otherwise use the symbol itself. */
|
||
if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
|
||
{
|
||
filestring = coff_getfilename (&main_aux[0], objfile);
|
||
}
|
||
else
|
||
filestring = namestring;
|
||
|
||
pst = xcoff_start_psymtab (objfile,
|
||
filestring,
|
||
symnum_before,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
last_csect_name = NULL;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("Storage class %d not recognized during scan"),
|
||
sclass);
|
||
}
|
||
/* FALLTHROUGH */
|
||
|
||
/* C_FCN is .bf and .ef symbols. I think it is sufficient
|
||
to handle only the C_FUN and C_EXT. */
|
||
case C_FCN:
|
||
|
||
case C_BSTAT:
|
||
case C_ESTAT:
|
||
case C_ARG:
|
||
case C_REGPARM:
|
||
case C_REG:
|
||
case C_TPDEF:
|
||
case C_STRTAG:
|
||
case C_UNTAG:
|
||
case C_ENTAG:
|
||
case C_LABEL:
|
||
case C_NULL:
|
||
|
||
/* C_EINCL means we are switching back to the main file. But there
|
||
is no reason to care; the only thing we want to know about
|
||
includes is the names of all the included (.h) files. */
|
||
case C_EINCL:
|
||
|
||
case C_BLOCK:
|
||
|
||
/* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
|
||
used instead. */
|
||
case C_STAT:
|
||
|
||
/* I don't think the name of the common block (as opposed to the
|
||
variables within it) is something which is user visible
|
||
currently. */
|
||
case C_BCOMM:
|
||
case C_ECOMM:
|
||
|
||
case C_PSYM:
|
||
case C_RPSYM:
|
||
|
||
/* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
|
||
so C_LSYM would appear to be only for locals. */
|
||
case C_LSYM:
|
||
|
||
case C_AUTO:
|
||
case C_RSYM:
|
||
{
|
||
/* We probably could save a few instructions by assuming that
|
||
C_LSYM, C_PSYM, etc., never have auxents. */
|
||
int naux1 = symbol.n_numaux + 1;
|
||
|
||
ssymnum += naux1;
|
||
sraw_symbol += bfd_coff_symesz (abfd) * naux1;
|
||
}
|
||
break;
|
||
|
||
case C_BINCL:
|
||
{
|
||
/* Mark down an include file in the current psymtab. */
|
||
enum language tmp_language;
|
||
|
||
swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
|
||
tmp_language = deduce_language_from_filename (namestring);
|
||
|
||
/* Only change the psymtab's language if we've learned
|
||
something useful (eg. tmp_language is not language_unknown).
|
||
In addition, to match what start_subfile does, never change
|
||
from C++ to C. */
|
||
if (tmp_language != language_unknown
|
||
&& (tmp_language != language_c
|
||
|| psymtab_language != language_cplus))
|
||
psymtab_language = tmp_language;
|
||
|
||
/* In C++, one may expect the same filename to come round many
|
||
times, when code is coming alternately from the main file
|
||
and from inline functions in other files. So I check to see
|
||
if this is a file we've seen before -- either the main
|
||
source file, or a previously included file.
|
||
|
||
This seems to be a lot of time to be spending on N_SOL, but
|
||
things like "break c-exp.y:435" need to work (I
|
||
suppose the psymtab_include_list could be hashed or put
|
||
in a binary tree, if profiling shows this is a major hog). */
|
||
if (pst && strcmp (namestring, pst->filename) == 0)
|
||
continue;
|
||
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < includes_used; i++)
|
||
if (strcmp (namestring, psymtab_include_list[i]) == 0)
|
||
{
|
||
i = -1;
|
||
break;
|
||
}
|
||
if (i == -1)
|
||
continue;
|
||
}
|
||
psymtab_include_list[includes_used++] = namestring;
|
||
if (includes_used >= includes_allocated)
|
||
{
|
||
const char **orig = psymtab_include_list;
|
||
|
||
psymtab_include_list = (const char **)
|
||
alloca ((includes_allocated *= 2) *
|
||
sizeof (const char *));
|
||
memcpy (psymtab_include_list, orig,
|
||
includes_used * sizeof (const char *));
|
||
}
|
||
continue;
|
||
}
|
||
case C_FUN:
|
||
/* The value of the C_FUN is not the address of the function (it
|
||
appears to be the address before linking), but as long as it
|
||
is smaller than the actual address, then find_pc_partial_function
|
||
will use the minimal symbols instead. I hope. */
|
||
|
||
case C_GSYM:
|
||
case C_ECOML:
|
||
case C_DECL:
|
||
case C_STSYM:
|
||
{
|
||
const char *p;
|
||
|
||
swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
|
||
p = strchr (namestring, ':');
|
||
if (!p)
|
||
continue; /* Not a debugging symbol. */
|
||
|
||
/* Main processing section for debugging symbols which
|
||
the initial read through the symbol tables needs to worry
|
||
about. If we reach this point, the symbol which we are
|
||
considering is definitely one we are interested in.
|
||
p must also contain the (valid) index into the namestring
|
||
which indicates the debugging type symbol. */
|
||
|
||
switch (p[1])
|
||
{
|
||
case 'S':
|
||
symbol.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
|
||
if (gdbarch_static_transform_name_p (gdbarch))
|
||
namestring = gdbarch_static_transform_name
|
||
(gdbarch, namestring);
|
||
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->static_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'G':
|
||
symbol.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
/* The addresses in these entries are reported to be
|
||
wrong. See the code that reads 'G's for symtabs. */
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->global_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'T':
|
||
/* When a 'T' entry is defining an anonymous enum, it
|
||
may have a name which is the empty string, or a
|
||
single space. Since they're not really defining a
|
||
symbol, those shouldn't go in the partial symbol
|
||
table. We do pick up the elements of such enums at
|
||
'check_enum:', below. */
|
||
if (p >= namestring + 2
|
||
|| (p == namestring + 1
|
||
&& namestring[0] != ' '))
|
||
{
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
STRUCT_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, psymtab_language, objfile);
|
||
if (p[2] == 't')
|
||
{
|
||
/* Also a typedef with the same name. */
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, psymtab_language, objfile);
|
||
p += 1;
|
||
}
|
||
}
|
||
goto check_enum;
|
||
|
||
case 't':
|
||
if (p != namestring) /* a name is there, not just :T... */
|
||
{
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, psymtab_language, objfile);
|
||
}
|
||
check_enum:
|
||
/* If this is an enumerated type, we need to
|
||
add all the enum constants to the partial symbol
|
||
table. This does not cover enums without names, e.g.
|
||
"enum {a, b} c;" in C, but fortunately those are
|
||
rare. There is no way for GDB to find those from the
|
||
enum type without spending too much time on it. Thus
|
||
to solve this problem, the compiler needs to put out the
|
||
enum in a nameless type. GCC2 does this. */
|
||
|
||
/* We are looking for something of the form
|
||
<name> ":" ("t" | "T") [<number> "="] "e"
|
||
{<constant> ":" <value> ","} ";". */
|
||
|
||
/* Skip over the colon and the 't' or 'T'. */
|
||
p += 2;
|
||
/* This type may be given a number. Also, numbers can come
|
||
in pairs like (0,26). Skip over it. */
|
||
while ((*p >= '0' && *p <= '9')
|
||
|| *p == '(' || *p == ',' || *p == ')'
|
||
|| *p == '=')
|
||
p++;
|
||
|
||
if (*p++ == 'e')
|
||
{
|
||
/* The aix4 compiler emits extra crud before the
|
||
members. */
|
||
if (*p == '-')
|
||
{
|
||
/* Skip over the type (?). */
|
||
while (*p != ':')
|
||
p++;
|
||
|
||
/* Skip over the colon. */
|
||
p++;
|
||
}
|
||
|
||
/* We have found an enumerated type. */
|
||
/* According to comments in read_enum_type
|
||
a comma could end it instead of a semicolon.
|
||
I don't know where that happens.
|
||
Accept either. */
|
||
while (*p && *p != ';' && *p != ',')
|
||
{
|
||
const char *q;
|
||
|
||
/* Check for and handle cretinous dbx symbol name
|
||
continuation! */
|
||
if (*p == '\\' || (*p == '?' && p[1] == '\0'))
|
||
p = next_symbol_text (objfile);
|
||
|
||
/* Point to the character after the name
|
||
of the enum constant. */
|
||
for (q = p; *q && *q != ':'; q++)
|
||
;
|
||
/* Note that the value doesn't matter for
|
||
enum constants in psymtabs, just in symtabs. */
|
||
add_psymbol_to_list (p, q - p, 1,
|
||
VAR_DOMAIN, LOC_CONST,
|
||
&objfile->static_psymbols,
|
||
0, psymtab_language, objfile);
|
||
/* Point past the name. */
|
||
p = q;
|
||
/* Skip over the value. */
|
||
while (*p && *p != ',')
|
||
p++;
|
||
/* Advance past the comma. */
|
||
if (*p)
|
||
p++;
|
||
}
|
||
}
|
||
continue;
|
||
|
||
case 'c':
|
||
/* Constant, e.g. from "const" in Pascal. */
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_CONST,
|
||
&objfile->static_psymbols,
|
||
0, psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'f':
|
||
if (! pst)
|
||
{
|
||
int name_len = p - namestring;
|
||
char *name = (char *) xmalloc (name_len + 1);
|
||
|
||
memcpy (name, namestring, name_len);
|
||
name[name_len] = '\0';
|
||
function_outside_compilation_unit_complaint (name);
|
||
xfree (name);
|
||
}
|
||
symbol.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->static_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
/* Global functions were ignored here, but now they
|
||
are put into the global psymtab like one would expect.
|
||
They're also in the minimal symbol table. */
|
||
case 'F':
|
||
if (! pst)
|
||
{
|
||
int name_len = p - namestring;
|
||
char *name = (char *) xmalloc (name_len + 1);
|
||
|
||
memcpy (name, namestring, name_len);
|
||
name[name_len] = '\0';
|
||
function_outside_compilation_unit_complaint (name);
|
||
xfree (name);
|
||
}
|
||
|
||
/* We need only the minimal symbols for these
|
||
loader-generated definitions. Keeping the global
|
||
symbols leads to "in psymbols but not in symbols"
|
||
errors. */
|
||
if (startswith (namestring, "@FIX"))
|
||
continue;
|
||
|
||
symbol.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
add_psymbol_to_list (namestring, p - namestring, 1,
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->global_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
/* Two things show up here (hopefully); static symbols of
|
||
local scope (static used inside braces) or extensions
|
||
of structure symbols. We can ignore both. */
|
||
case 'V':
|
||
case '(':
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '-':
|
||
case '#': /* For symbol identification (used in
|
||
live ranges). */
|
||
continue;
|
||
|
||
case ':':
|
||
/* It is a C++ nested symbol. We don't need to record it
|
||
(I don't think); if we try to look up foo::bar::baz,
|
||
then symbols for the symtab containing foo should get
|
||
read in, I think. */
|
||
/* Someone says sun cc puts out symbols like
|
||
/foo/baz/maclib::/usr/local/bin/maclib,
|
||
which would get here with a symbol type of ':'. */
|
||
continue;
|
||
|
||
default:
|
||
/* Unexpected symbol descriptor. The second and
|
||
subsequent stabs of a continued stab can show up
|
||
here. The question is whether they ever can mimic
|
||
a normal stab--it would be nice if not, since we
|
||
certainly don't want to spend the time searching to
|
||
the end of every string looking for a
|
||
backslash. */
|
||
|
||
complaint (&symfile_complaints,
|
||
_("unknown symbol descriptor `%c'"), p[1]);
|
||
|
||
/* Ignore it; perhaps it is an extension that we don't
|
||
know about. */
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (pst)
|
||
{
|
||
xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used,
|
||
ssymnum, dependency_list,
|
||
dependencies_used, textlow_not_set);
|
||
}
|
||
|
||
/* Record the toc offset value of this symbol table into objfile
|
||
structure. If no XMC_TC0 is found, toc_offset should be zero.
|
||
Another place to obtain this information would be file auxiliary
|
||
header. */
|
||
|
||
XCOFF_DATA (objfile)->toc_offset = toc_offset;
|
||
}
|
||
|
||
/* Return the toc offset value for a given objfile. */
|
||
|
||
CORE_ADDR
|
||
xcoff_get_toc_offset (struct objfile *objfile)
|
||
{
|
||
if (objfile)
|
||
return XCOFF_DATA (objfile)->toc_offset;
|
||
return 0;
|
||
}
|
||
|
||
/* Scan and build partial symbols for a symbol file.
|
||
We have been initialized by a call to dbx_symfile_init, which
|
||
put all the relevant info into a "struct dbx_symfile_info",
|
||
hung off the objfile structure.
|
||
|
||
SECTION_OFFSETS contains offsets relative to which the symbols in the
|
||
various sections are (depending where the sections were actually
|
||
loaded). */
|
||
|
||
static void
|
||
xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
|
||
{
|
||
bfd *abfd;
|
||
int val;
|
||
struct cleanup *back_to;
|
||
int num_symbols; /* # of symbols */
|
||
file_ptr symtab_offset; /* symbol table and */
|
||
file_ptr stringtab_offset; /* string table file offsets */
|
||
struct coff_symfile_info *info;
|
||
const char *name;
|
||
unsigned int size;
|
||
|
||
info = XCOFF_DATA (objfile);
|
||
symfile_bfd = abfd = objfile->obfd;
|
||
name = objfile_name (objfile);
|
||
|
||
num_symbols = bfd_get_symcount (abfd); /* # of symbols */
|
||
symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
|
||
stringtab_offset = symtab_offset +
|
||
num_symbols * coff_data (abfd)->local_symesz;
|
||
|
||
info->min_lineno_offset = 0;
|
||
info->max_lineno_offset = 0;
|
||
bfd_map_over_sections (abfd, find_linenos, info);
|
||
|
||
if (num_symbols > 0)
|
||
{
|
||
/* Read the string table. */
|
||
init_stringtab (abfd, stringtab_offset, objfile);
|
||
|
||
/* Read the .debug section, if present. */
|
||
{
|
||
struct bfd_section *secp;
|
||
bfd_size_type length;
|
||
bfd_byte *debugsec = NULL;
|
||
|
||
secp = bfd_get_section_by_name (abfd, ".debug");
|
||
if (secp)
|
||
{
|
||
length = bfd_section_size (abfd, secp);
|
||
if (length)
|
||
{
|
||
debugsec
|
||
= (bfd_byte *) obstack_alloc (&objfile->objfile_obstack,
|
||
length);
|
||
|
||
if (!bfd_get_full_section_contents (abfd, secp, &debugsec))
|
||
{
|
||
error (_("Error reading .debug section of `%s': %s"),
|
||
name, bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
}
|
||
}
|
||
info->debugsec = (char *) debugsec;
|
||
}
|
||
}
|
||
|
||
/* Read the symbols. We keep them in core because we will want to
|
||
access them randomly in read_symbol*. */
|
||
val = bfd_seek (abfd, symtab_offset, SEEK_SET);
|
||
if (val < 0)
|
||
error (_("Error reading symbols from %s: %s"),
|
||
name, bfd_errmsg (bfd_get_error ()));
|
||
size = coff_data (abfd)->local_symesz * num_symbols;
|
||
info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size);
|
||
info->symtbl_num_syms = num_symbols;
|
||
|
||
val = bfd_bread (info->symtbl, size, abfd);
|
||
if (val != size)
|
||
perror_with_name (_("reading symbol table"));
|
||
|
||
/* If we are reinitializing, or if we have never loaded syms yet, init. */
|
||
if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
|
||
/* I'm not sure how how good num_symbols is; the rule of thumb in
|
||
init_psymbol_list was developed for a.out. On the one hand,
|
||
num_symbols includes auxents. On the other hand, it doesn't
|
||
include N_SLINE. */
|
||
init_psymbol_list (objfile, num_symbols);
|
||
|
||
free_pending_blocks ();
|
||
back_to = make_cleanup (really_free_pendings, 0);
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup_discard_minimal_symbols ();
|
||
|
||
/* Now that the symbol table data of the executable file are all in core,
|
||
process them and define symbols accordingly. */
|
||
|
||
scan_xcoff_symtab (objfile);
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
|
||
install_minimal_symbols (objfile);
|
||
|
||
/* DWARF2 sections. */
|
||
|
||
if (dwarf2_has_info (objfile, &dwarf2_xcoff_names))
|
||
dwarf2_build_psymtabs (objfile);
|
||
|
||
dwarf2_build_frame_info (objfile);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
xcoff_symfile_offsets (struct objfile *objfile,
|
||
const struct section_addr_info *addrs)
|
||
{
|
||
const char *first_section_name;
|
||
|
||
default_symfile_offsets (objfile, addrs);
|
||
|
||
/* Oneof the weird side-effects of default_symfile_offsets is that
|
||
it sometimes sets some section indices to zero for sections that,
|
||
in fact do not exist. See the body of default_symfile_offsets
|
||
for more info on when that happens. Undo that, as this then allows
|
||
us to test whether the associated section exists or not, and then
|
||
access it quickly (without searching it again). */
|
||
|
||
if (objfile->num_sections == 0)
|
||
return; /* Is that even possible? Better safe than sorry. */
|
||
|
||
first_section_name
|
||
= bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section);
|
||
|
||
if (objfile->sect_index_text == 0
|
||
&& strcmp (first_section_name, ".text") != 0)
|
||
objfile->sect_index_text = -1;
|
||
|
||
if (objfile->sect_index_data == 0
|
||
&& strcmp (first_section_name, ".data") != 0)
|
||
objfile->sect_index_data = -1;
|
||
|
||
if (objfile->sect_index_bss == 0
|
||
&& strcmp (first_section_name, ".bss") != 0)
|
||
objfile->sect_index_bss = -1;
|
||
|
||
if (objfile->sect_index_rodata == 0
|
||
&& strcmp (first_section_name, ".rodata") != 0)
|
||
objfile->sect_index_rodata = -1;
|
||
}
|
||
|
||
/* Register our ability to parse symbols for xcoff BFD files. */
|
||
|
||
static const struct sym_fns xcoff_sym_fns =
|
||
{
|
||
|
||
/* It is possible that coff and xcoff should be merged as
|
||
they do have fundamental similarities (for example, the extra storage
|
||
classes used for stabs could presumably be recognized in any COFF file).
|
||
However, in addition to obvious things like all the csect hair, there are
|
||
some subtler differences between xcoffread.c and coffread.c, notably
|
||
the fact that coffread.c has no need to read in all the symbols, but
|
||
xcoffread.c reads all the symbols and does in fact randomly access them
|
||
(in C_BSTAT and line number processing). */
|
||
|
||
xcoff_new_init, /* init anything gbl to entire symtab */
|
||
xcoff_symfile_init, /* read initial info, setup for sym_read() */
|
||
xcoff_initial_scan, /* read a symbol file into symtab */
|
||
NULL, /* sym_read_psymbols */
|
||
xcoff_symfile_finish, /* finished with file, cleanup */
|
||
xcoff_symfile_offsets, /* xlate offsets ext->int form */
|
||
default_symfile_segments, /* Get segment information from a file. */
|
||
aix_process_linenos,
|
||
default_symfile_relocate, /* Relocate a debug section. */
|
||
NULL, /* sym_probe_fns */
|
||
&psym_functions
|
||
};
|
||
|
||
/* Same as xcoff_get_n_import_files, but for core files. */
|
||
|
||
static int
|
||
xcoff_get_core_n_import_files (bfd *abfd)
|
||
{
|
||
asection *sect = bfd_get_section_by_name (abfd, ".ldinfo");
|
||
gdb_byte buf[4];
|
||
file_ptr offset = 0;
|
||
int n_entries = 0;
|
||
|
||
if (sect == NULL)
|
||
return -1; /* Not a core file. */
|
||
|
||
for (offset = 0; offset < bfd_get_section_size (sect);)
|
||
{
|
||
int next;
|
||
|
||
n_entries++;
|
||
|
||
if (!bfd_get_section_contents (abfd, sect, buf, offset, 4))
|
||
return -1;
|
||
next = bfd_get_32 (abfd, buf);
|
||
if (next == 0)
|
||
break; /* This is the last entry. */
|
||
offset += next;
|
||
}
|
||
|
||
/* Return the number of entries, excluding the first one, which is
|
||
the path to the executable that produced this core file. */
|
||
return n_entries - 1;
|
||
}
|
||
|
||
/* Return the number of import files (shared libraries) that the given
|
||
BFD depends on. Return -1 if this number could not be computed. */
|
||
|
||
int
|
||
xcoff_get_n_import_files (bfd *abfd)
|
||
{
|
||
asection *sect = bfd_get_section_by_name (abfd, ".loader");
|
||
gdb_byte buf[4];
|
||
int l_nimpid;
|
||
|
||
/* If the ".loader" section does not exist, the objfile is probably
|
||
not an executable. Might be a core file... */
|
||
if (sect == NULL)
|
||
return xcoff_get_core_n_import_files (abfd);
|
||
|
||
/* The number of entries in the Import Files Table is stored in
|
||
field l_nimpid. This field is always at offset 16, and is
|
||
always 4 bytes long. Read those 4 bytes. */
|
||
|
||
if (!bfd_get_section_contents (abfd, sect, buf, 16, 4))
|
||
return -1;
|
||
l_nimpid = bfd_get_32 (abfd, buf);
|
||
|
||
/* By convention, the first entry is the default LIBPATH value
|
||
to be used by the system loader, so it does not count towards
|
||
the number of import files. */
|
||
return l_nimpid - 1;
|
||
}
|
||
|
||
/* Free the per-objfile xcoff data. */
|
||
|
||
static void
|
||
xcoff_free_info (struct objfile *objfile, void *arg)
|
||
{
|
||
xfree (arg);
|
||
}
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
extern initialize_file_ftype _initialize_xcoffread;
|
||
|
||
void
|
||
_initialize_xcoffread (void)
|
||
{
|
||
add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns);
|
||
|
||
xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL,
|
||
xcoff_free_info);
|
||
}
|