/* Read ELF (Executable and Linking Format) object files for GDB.
|
/* Read ELF (Executable and Linking Format) object files for GDB.
|
Copyright 1991, 92, 93, 94, 95, 96, 1998 Free Software Foundation, Inc.
|
Copyright 1991, 92, 93, 94, 95, 96, 1998 Free Software Foundation, Inc.
|
Written by Fred Fish at Cygnus Support.
|
Written by Fred Fish at Cygnus Support.
|
|
|
This file is part of GDB.
|
This file is part of GDB.
|
|
|
This program is free software; you can redistribute it and/or modify
|
This program is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 2 of the License, or
|
the Free Software Foundation; either version 2 of the License, or
|
(at your option) any later version.
|
(at your option) any later version.
|
|
|
This program is distributed in the hope that it will be useful,
|
This program is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with this program; if not, write to the Free Software
|
along with this program; if not, write to the Free Software
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
Boston, MA 02111-1307, USA. */
|
Boston, MA 02111-1307, USA. */
|
|
|
#include "defs.h"
|
#include "defs.h"
|
#include "bfd.h"
|
#include "bfd.h"
|
#include "gdb_string.h"
|
#include "gdb_string.h"
|
#include "elf-bfd.h"
|
#include "elf-bfd.h"
|
#include "elf/mips.h"
|
#include "elf/mips.h"
|
#include "symtab.h"
|
#include "symtab.h"
|
#include "symfile.h"
|
#include "symfile.h"
|
#include "objfiles.h"
|
#include "objfiles.h"
|
#include "buildsym.h"
|
#include "buildsym.h"
|
#include "stabsread.h"
|
#include "stabsread.h"
|
#include "gdb-stabs.h"
|
#include "gdb-stabs.h"
|
#include "complaints.h"
|
#include "complaints.h"
|
#include "demangle.h"
|
#include "demangle.h"
|
|
|
extern void _initialize_elfread PARAMS ((void));
|
extern void _initialize_elfread PARAMS ((void));
|
|
|
/* The struct elfinfo is available only during ELF symbol table and
|
/* The struct elfinfo is available only during ELF symbol table and
|
psymtab reading. It is destroyed at the completion of psymtab-reading.
|
psymtab reading. It is destroyed at the completion of psymtab-reading.
|
It's local to elf_symfile_read. */
|
It's local to elf_symfile_read. */
|
|
|
struct elfinfo
|
struct elfinfo
|
{
|
{
|
file_ptr dboffset; /* Offset to dwarf debug section */
|
file_ptr dboffset; /* Offset to dwarf debug section */
|
unsigned int dbsize; /* Size of dwarf debug section */
|
unsigned int dbsize; /* Size of dwarf debug section */
|
file_ptr lnoffset; /* Offset to dwarf line number section */
|
file_ptr lnoffset; /* Offset to dwarf line number section */
|
unsigned int lnsize; /* Size of dwarf line number section */
|
unsigned int lnsize; /* Size of dwarf line number section */
|
asection *stabsect; /* Section pointer for .stab section */
|
asection *stabsect; /* Section pointer for .stab section */
|
asection *stabindexsect; /* Section pointer for .stab.index section */
|
asection *stabindexsect; /* Section pointer for .stab.index section */
|
asection *mdebugsect; /* Section pointer for .mdebug section */
|
asection *mdebugsect; /* Section pointer for .mdebug section */
|
};
|
};
|
|
|
/* Various things we might complain about... */
|
/* Various things we might complain about... */
|
|
|
struct complaint section_info_complaint =
|
struct complaint section_info_complaint =
|
{"elf/stab section information %s without a preceding file symbol", 0, 0};
|
{"elf/stab section information %s without a preceding file symbol", 0, 0};
|
|
|
struct complaint section_info_dup_complaint =
|
struct complaint section_info_dup_complaint =
|
{"duplicated elf/stab section information for %s", 0, 0};
|
{"duplicated elf/stab section information for %s", 0, 0};
|
|
|
struct complaint stab_info_mismatch_complaint =
|
struct complaint stab_info_mismatch_complaint =
|
{"elf/stab section information missing for %s", 0, 0};
|
{"elf/stab section information missing for %s", 0, 0};
|
|
|
struct complaint stab_info_questionable_complaint =
|
struct complaint stab_info_questionable_complaint =
|
{"elf/stab section information questionable for %s", 0, 0};
|
{"elf/stab section information questionable for %s", 0, 0};
|
|
|
static void
|
static void
|
elf_symfile_init PARAMS ((struct objfile *));
|
elf_symfile_init PARAMS ((struct objfile *));
|
|
|
static void
|
static void
|
elf_new_init PARAMS ((struct objfile *));
|
elf_new_init PARAMS ((struct objfile *));
|
|
|
static void
|
static void
|
elf_symfile_read PARAMS ((struct objfile *, int));
|
elf_symfile_read PARAMS ((struct objfile *, int));
|
|
|
static void
|
static void
|
elf_symfile_finish PARAMS ((struct objfile *));
|
elf_symfile_finish PARAMS ((struct objfile *));
|
|
|
static void
|
static void
|
elf_symtab_read PARAMS ((struct objfile *, int));
|
elf_symtab_read PARAMS ((struct objfile *, int));
|
|
|
static void
|
static void
|
free_elfinfo PARAMS ((void *));
|
free_elfinfo PARAMS ((void *));
|
|
|
static struct minimal_symbol *
|
static struct minimal_symbol *
|
record_minimal_symbol_and_info PARAMS ((char *, CORE_ADDR,
|
record_minimal_symbol_and_info PARAMS ((char *, CORE_ADDR,
|
enum minimal_symbol_type, char *,
|
enum minimal_symbol_type, char *,
|
asection * bfd_section,
|
asection * bfd_section,
|
struct objfile *));
|
struct objfile *));
|
|
|
static void
|
static void
|
elf_locate_sections PARAMS ((bfd *, asection *, void *));
|
elf_locate_sections PARAMS ((bfd *, asection *, void *));
|
|
|
/* We are called once per section from elf_symfile_read. We
|
/* We are called once per section from elf_symfile_read. We
|
need to examine each section we are passed, check to see
|
need to examine each section we are passed, check to see
|
if it is something we are interested in processing, and
|
if it is something we are interested in processing, and
|
if so, stash away some access information for the section.
|
if so, stash away some access information for the section.
|
|
|
For now we recognize the dwarf debug information sections and
|
For now we recognize the dwarf debug information sections and
|
line number sections from matching their section names. The
|
line number sections from matching their section names. The
|
ELF definition is no real help here since it has no direct
|
ELF definition is no real help here since it has no direct
|
knowledge of DWARF (by design, so any debugging format can be
|
knowledge of DWARF (by design, so any debugging format can be
|
used).
|
used).
|
|
|
We also recognize the ".stab" sections used by the Sun compilers
|
We also recognize the ".stab" sections used by the Sun compilers
|
released with Solaris 2.
|
released with Solaris 2.
|
|
|
FIXME: The section names should not be hardwired strings (what
|
FIXME: The section names should not be hardwired strings (what
|
should they be? I don't think most object file formats have enough
|
should they be? I don't think most object file formats have enough
|
section flags to specify what kind of debug section it is
|
section flags to specify what kind of debug section it is
|
-kingdon). */
|
-kingdon). */
|
|
|
static void
|
static void
|
elf_locate_sections (ignore_abfd, sectp, eip)
|
elf_locate_sections (ignore_abfd, sectp, eip)
|
bfd *ignore_abfd;
|
bfd *ignore_abfd;
|
asection *sectp;
|
asection *sectp;
|
PTR eip;
|
PTR eip;
|
{
|
{
|
register struct elfinfo *ei;
|
register struct elfinfo *ei;
|
|
|
ei = (struct elfinfo *) eip;
|
ei = (struct elfinfo *) eip;
|
if (STREQ (sectp->name, ".debug"))
|
if (STREQ (sectp->name, ".debug"))
|
{
|
{
|
ei->dboffset = sectp->filepos;
|
ei->dboffset = sectp->filepos;
|
ei->dbsize = bfd_get_section_size_before_reloc (sectp);
|
ei->dbsize = bfd_get_section_size_before_reloc (sectp);
|
}
|
}
|
else if (STREQ (sectp->name, ".line"))
|
else if (STREQ (sectp->name, ".line"))
|
{
|
{
|
ei->lnoffset = sectp->filepos;
|
ei->lnoffset = sectp->filepos;
|
ei->lnsize = bfd_get_section_size_before_reloc (sectp);
|
ei->lnsize = bfd_get_section_size_before_reloc (sectp);
|
}
|
}
|
else if (STREQ (sectp->name, ".stab"))
|
else if (STREQ (sectp->name, ".stab"))
|
{
|
{
|
ei->stabsect = sectp;
|
ei->stabsect = sectp;
|
}
|
}
|
else if (STREQ (sectp->name, ".stab.index"))
|
else if (STREQ (sectp->name, ".stab.index"))
|
{
|
{
|
ei->stabindexsect = sectp;
|
ei->stabindexsect = sectp;
|
}
|
}
|
else if (STREQ (sectp->name, ".mdebug"))
|
else if (STREQ (sectp->name, ".mdebug"))
|
{
|
{
|
ei->mdebugsect = sectp;
|
ei->mdebugsect = sectp;
|
}
|
}
|
}
|
}
|
|
|
#if 0 /* Currently unused */
|
#if 0 /* Currently unused */
|
|
|
char *
|
char *
|
elf_interpreter (abfd)
|
elf_interpreter (abfd)
|
bfd *abfd;
|
bfd *abfd;
|
{
|
{
|
sec_ptr interp_sec;
|
sec_ptr interp_sec;
|
unsigned size;
|
unsigned size;
|
char *interp = NULL;
|
char *interp = NULL;
|
|
|
interp_sec = bfd_get_section_by_name (abfd, ".interp");
|
interp_sec = bfd_get_section_by_name (abfd, ".interp");
|
if (interp_sec)
|
if (interp_sec)
|
{
|
{
|
size = bfd_section_size (abfd, interp_sec);
|
size = bfd_section_size (abfd, interp_sec);
|
interp = alloca (size);
|
interp = alloca (size);
|
if (bfd_get_section_contents (abfd, interp_sec, interp, (file_ptr) 0,
|
if (bfd_get_section_contents (abfd, interp_sec, interp, (file_ptr) 0,
|
size))
|
size))
|
{
|
{
|
interp = savestring (interp, size - 1);
|
interp = savestring (interp, size - 1);
|
}
|
}
|
else
|
else
|
{
|
{
|
interp = NULL;
|
interp = NULL;
|
}
|
}
|
}
|
}
|
return (interp);
|
return (interp);
|
}
|
}
|
|
|
#endif
|
#endif
|
|
|
static struct minimal_symbol *
|
static struct minimal_symbol *
|
record_minimal_symbol_and_info (name, address, ms_type, info, bfd_section,
|
record_minimal_symbol_and_info (name, address, ms_type, info, bfd_section,
|
objfile)
|
objfile)
|
char *name;
|
char *name;
|
CORE_ADDR address;
|
CORE_ADDR address;
|
enum minimal_symbol_type ms_type;
|
enum minimal_symbol_type ms_type;
|
char *info; /* FIXME, is this really char *? */
|
char *info; /* FIXME, is this really char *? */
|
asection *bfd_section;
|
asection *bfd_section;
|
struct objfile *objfile;
|
struct objfile *objfile;
|
{
|
{
|
int section;
|
int section;
|
|
|
/* Guess the section from the type. This is likely to be wrong in
|
/* Guess the section from the type. This is likely to be wrong in
|
some cases. */
|
some cases. */
|
switch (ms_type)
|
switch (ms_type)
|
{
|
{
|
case mst_text:
|
case mst_text:
|
case mst_file_text:
|
case mst_file_text:
|
section = SECT_OFF_TEXT;
|
section = SECT_OFF_TEXT;
|
#ifdef SMASH_TEXT_ADDRESS
|
#ifdef SMASH_TEXT_ADDRESS
|
SMASH_TEXT_ADDRESS (address);
|
SMASH_TEXT_ADDRESS (address);
|
#endif
|
#endif
|
break;
|
break;
|
case mst_data:
|
case mst_data:
|
case mst_file_data:
|
case mst_file_data:
|
section = SECT_OFF_DATA;
|
section = SECT_OFF_DATA;
|
break;
|
break;
|
case mst_bss:
|
case mst_bss:
|
case mst_file_bss:
|
case mst_file_bss:
|
section = SECT_OFF_BSS;
|
section = SECT_OFF_BSS;
|
break;
|
break;
|
default:
|
default:
|
section = -1;
|
section = -1;
|
break;
|
break;
|
}
|
}
|
|
|
return prim_record_minimal_symbol_and_info
|
return prim_record_minimal_symbol_and_info
|
(name, address, ms_type, info, section, bfd_section, objfile);
|
(name, address, ms_type, info, section, bfd_section, objfile);
|
}
|
}
|
|
|
/*
|
/*
|
|
|
LOCAL FUNCTION
|
LOCAL FUNCTION
|
|
|
elf_symtab_read -- read the symbol table of an ELF file
|
elf_symtab_read -- read the symbol table of an ELF file
|
|
|
SYNOPSIS
|
SYNOPSIS
|
|
|
void elf_symtab_read (struct objfile *objfile, int dynamic)
|
void elf_symtab_read (struct objfile *objfile, int dynamic)
|
|
|
DESCRIPTION
|
DESCRIPTION
|
|
|
Given an objfile and a flag that specifies whether or not the objfile
|
Given an objfile and a flag that specifies whether or not the objfile
|
is for an executable or not (may be shared library for example), add
|
is for an executable or not (may be shared library for example), add
|
all the global function and data symbols to the minimal symbol table.
|
all the global function and data symbols to the minimal symbol table.
|
|
|
In stabs-in-ELF, as implemented by Sun, there are some local symbols
|
In stabs-in-ELF, as implemented by Sun, there are some local symbols
|
defined in the ELF symbol table, which can be used to locate
|
defined in the ELF symbol table, which can be used to locate
|
the beginnings of sections from each ".o" file that was linked to
|
the beginnings of sections from each ".o" file that was linked to
|
form the executable objfile. We gather any such info and record it
|
form the executable objfile. We gather any such info and record it
|
in data structures hung off the objfile's private data.
|
in data structures hung off the objfile's private data.
|
|
|
*/
|
*/
|
|
|
static void
|
static void
|
elf_symtab_read (objfile, dynamic)
|
elf_symtab_read (objfile, dynamic)
|
struct objfile *objfile;
|
struct objfile *objfile;
|
int dynamic;
|
int dynamic;
|
{
|
{
|
long storage_needed;
|
long storage_needed;
|
asymbol *sym;
|
asymbol *sym;
|
asymbol **symbol_table;
|
asymbol **symbol_table;
|
long number_of_symbols;
|
long number_of_symbols;
|
long i;
|
long i;
|
int index;
|
int index;
|
struct cleanup *back_to;
|
struct cleanup *back_to;
|
CORE_ADDR symaddr;
|
CORE_ADDR symaddr;
|
CORE_ADDR offset;
|
CORE_ADDR offset;
|
enum minimal_symbol_type ms_type;
|
enum minimal_symbol_type ms_type;
|
/* If sectinfo is nonNULL, it contains section info that should end up
|
/* If sectinfo is nonNULL, it contains section info that should end up
|
filed in the objfile. */
|
filed in the objfile. */
|
struct stab_section_info *sectinfo = NULL;
|
struct stab_section_info *sectinfo = NULL;
|
/* If filesym is nonzero, it points to a file symbol, but we haven't
|
/* If filesym is nonzero, it points to a file symbol, but we haven't
|
seen any section info for it yet. */
|
seen any section info for it yet. */
|
asymbol *filesym = 0;
|
asymbol *filesym = 0;
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
/* Name of filesym, as saved on the symbol_obstack. */
|
/* Name of filesym, as saved on the symbol_obstack. */
|
char *filesymname = obsavestring ("", 0, &objfile->symbol_obstack);
|
char *filesymname = obsavestring ("", 0, &objfile->symbol_obstack);
|
#endif
|
#endif
|
struct dbx_symfile_info *dbx = objfile->sym_stab_info;
|
struct dbx_symfile_info *dbx = objfile->sym_stab_info;
|
unsigned long size;
|
unsigned long size;
|
int stripped = (bfd_get_symcount (objfile->obfd) == 0);
|
int stripped = (bfd_get_symcount (objfile->obfd) == 0);
|
|
|
if (dynamic)
|
if (dynamic)
|
{
|
{
|
storage_needed = bfd_get_dynamic_symtab_upper_bound (objfile->obfd);
|
storage_needed = bfd_get_dynamic_symtab_upper_bound (objfile->obfd);
|
|
|
/* Nothing to be done if there is no dynamic symtab. */
|
/* Nothing to be done if there is no dynamic symtab. */
|
if (storage_needed < 0)
|
if (storage_needed < 0)
|
return;
|
return;
|
}
|
}
|
else
|
else
|
{
|
{
|
storage_needed = bfd_get_symtab_upper_bound (objfile->obfd);
|
storage_needed = bfd_get_symtab_upper_bound (objfile->obfd);
|
if (storage_needed < 0)
|
if (storage_needed < 0)
|
error ("Can't read symbols from %s: %s", bfd_get_filename (objfile->obfd),
|
error ("Can't read symbols from %s: %s", bfd_get_filename (objfile->obfd),
|
bfd_errmsg (bfd_get_error ()));
|
bfd_errmsg (bfd_get_error ()));
|
}
|
}
|
if (storage_needed > 0)
|
if (storage_needed > 0)
|
{
|
{
|
symbol_table = (asymbol **) xmalloc (storage_needed);
|
symbol_table = (asymbol **) xmalloc (storage_needed);
|
back_to = make_cleanup (free, symbol_table);
|
back_to = make_cleanup (free, symbol_table);
|
if (dynamic)
|
if (dynamic)
|
number_of_symbols = bfd_canonicalize_dynamic_symtab (objfile->obfd,
|
number_of_symbols = bfd_canonicalize_dynamic_symtab (objfile->obfd,
|
symbol_table);
|
symbol_table);
|
else
|
else
|
number_of_symbols = bfd_canonicalize_symtab (objfile->obfd, symbol_table);
|
number_of_symbols = bfd_canonicalize_symtab (objfile->obfd, symbol_table);
|
if (number_of_symbols < 0)
|
if (number_of_symbols < 0)
|
error ("Can't read symbols from %s: %s", bfd_get_filename (objfile->obfd),
|
error ("Can't read symbols from %s: %s", bfd_get_filename (objfile->obfd),
|
bfd_errmsg (bfd_get_error ()));
|
bfd_errmsg (bfd_get_error ()));
|
/* FIXME: Should use section specific offset, not SECT_OFF_TEXT. */
|
/* FIXME: Should use section specific offset, not SECT_OFF_TEXT. */
|
offset = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT);
|
offset = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT);
|
for (i = 0; i < number_of_symbols; i++)
|
for (i = 0; i < number_of_symbols; i++)
|
{
|
{
|
sym = symbol_table[i];
|
sym = symbol_table[i];
|
if (sym->name == NULL || *sym->name == '\0')
|
if (sym->name == NULL || *sym->name == '\0')
|
{
|
{
|
/* Skip names that don't exist (shouldn't happen), or names
|
/* Skip names that don't exist (shouldn't happen), or names
|
that are null strings (may happen). */
|
that are null strings (may happen). */
|
continue;
|
continue;
|
}
|
}
|
|
|
if (dynamic
|
if (dynamic
|
&& sym->section == &bfd_und_section
|
&& sym->section == &bfd_und_section
|
&& (sym->flags & BSF_FUNCTION))
|
&& (sym->flags & BSF_FUNCTION))
|
{
|
{
|
struct minimal_symbol *msym;
|
struct minimal_symbol *msym;
|
|
|
/* Symbol is a reference to a function defined in
|
/* Symbol is a reference to a function defined in
|
a shared library.
|
a shared library.
|
If its value is non zero then it is usually the address
|
If its value is non zero then it is usually the address
|
of the corresponding entry in the procedure linkage table,
|
of the corresponding entry in the procedure linkage table,
|
plus the desired section offset.
|
plus the desired section offset.
|
If its value is zero then the dynamic linker has to resolve
|
If its value is zero then the dynamic linker has to resolve
|
the symbol. We are unable to find any meaningful address
|
the symbol. We are unable to find any meaningful address
|
for this symbol in the executable file, so we skip it. */
|
for this symbol in the executable file, so we skip it. */
|
symaddr = sym->value;
|
symaddr = sym->value;
|
if (symaddr == 0)
|
if (symaddr == 0)
|
continue;
|
continue;
|
symaddr += offset;
|
symaddr += offset;
|
msym = record_minimal_symbol_and_info
|
msym = record_minimal_symbol_and_info
|
((char *) sym->name, symaddr,
|
((char *) sym->name, symaddr,
|
mst_solib_trampoline, NULL, sym->section, objfile);
|
mst_solib_trampoline, NULL, sym->section, objfile);
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
if (msym != NULL)
|
if (msym != NULL)
|
msym->filename = filesymname;
|
msym->filename = filesymname;
|
#endif
|
#endif
|
continue;
|
continue;
|
}
|
}
|
|
|
/* If it is a nonstripped executable, do not enter dynamic
|
/* If it is a nonstripped executable, do not enter dynamic
|
symbols, as the dynamic symbol table is usually a subset
|
symbols, as the dynamic symbol table is usually a subset
|
of the main symbol table. */
|
of the main symbol table. */
|
if (dynamic && !stripped)
|
if (dynamic && !stripped)
|
continue;
|
continue;
|
if (sym->flags & BSF_FILE)
|
if (sym->flags & BSF_FILE)
|
{
|
{
|
/* STT_FILE debugging symbol that helps stabs-in-elf debugging.
|
/* STT_FILE debugging symbol that helps stabs-in-elf debugging.
|
Chain any old one onto the objfile; remember new sym. */
|
Chain any old one onto the objfile; remember new sym. */
|
if (sectinfo != NULL)
|
if (sectinfo != NULL)
|
{
|
{
|
sectinfo->next = dbx->stab_section_info;
|
sectinfo->next = dbx->stab_section_info;
|
dbx->stab_section_info = sectinfo;
|
dbx->stab_section_info = sectinfo;
|
sectinfo = NULL;
|
sectinfo = NULL;
|
}
|
}
|
filesym = sym;
|
filesym = sym;
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
filesymname =
|
filesymname =
|
obsavestring ((char *) filesym->name, strlen (filesym->name),
|
obsavestring ((char *) filesym->name, strlen (filesym->name),
|
&objfile->symbol_obstack);
|
&objfile->symbol_obstack);
|
#endif
|
#endif
|
}
|
}
|
else if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
|
else if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
|
{
|
{
|
struct minimal_symbol *msym;
|
struct minimal_symbol *msym;
|
|
|
/* Select global/local/weak symbols. Note that bfd puts abs
|
/* Select global/local/weak symbols. Note that bfd puts abs
|
symbols in their own section, so all symbols we are
|
symbols in their own section, so all symbols we are
|
interested in will have a section. */
|
interested in will have a section. */
|
/* Bfd symbols are section relative. */
|
/* Bfd symbols are section relative. */
|
symaddr = sym->value + sym->section->vma;
|
symaddr = sym->value + sym->section->vma;
|
/* Relocate all non-absolute symbols by the section offset. */
|
/* Relocate all non-absolute symbols by the section offset. */
|
if (sym->section != &bfd_abs_section)
|
if (sym->section != &bfd_abs_section)
|
{
|
{
|
symaddr += offset;
|
symaddr += offset;
|
}
|
}
|
/* For non-absolute symbols, use the type of the section
|
/* For non-absolute symbols, use the type of the section
|
they are relative to, to intuit text/data. Bfd provides
|
they are relative to, to intuit text/data. Bfd provides
|
no way of figuring this out for absolute symbols. */
|
no way of figuring this out for absolute symbols. */
|
if (sym->section == &bfd_abs_section)
|
if (sym->section == &bfd_abs_section)
|
{
|
{
|
/* This is a hack to get the minimal symbol type
|
/* This is a hack to get the minimal symbol type
|
right for Irix 5, which has absolute addresses
|
right for Irix 5, which has absolute addresses
|
with special section indices for dynamic symbols. */
|
with special section indices for dynamic symbols. */
|
unsigned short shndx =
|
unsigned short shndx =
|
((elf_symbol_type *) sym)->internal_elf_sym.st_shndx;
|
((elf_symbol_type *) sym)->internal_elf_sym.st_shndx;
|
|
|
switch (shndx)
|
switch (shndx)
|
{
|
{
|
case SHN_MIPS_TEXT:
|
case SHN_MIPS_TEXT:
|
ms_type = mst_text;
|
ms_type = mst_text;
|
break;
|
break;
|
case SHN_MIPS_DATA:
|
case SHN_MIPS_DATA:
|
ms_type = mst_data;
|
ms_type = mst_data;
|
break;
|
break;
|
case SHN_MIPS_ACOMMON:
|
case SHN_MIPS_ACOMMON:
|
ms_type = mst_bss;
|
ms_type = mst_bss;
|
break;
|
break;
|
default:
|
default:
|
ms_type = mst_abs;
|
ms_type = mst_abs;
|
}
|
}
|
|
|
/* If it is an Irix dynamic symbol, skip section name
|
/* If it is an Irix dynamic symbol, skip section name
|
symbols, relocate all others by section offset. */
|
symbols, relocate all others by section offset. */
|
if (ms_type != mst_abs)
|
if (ms_type != mst_abs)
|
{
|
{
|
if (sym->name[0] == '.')
|
if (sym->name[0] == '.')
|
continue;
|
continue;
|
symaddr += offset;
|
symaddr += offset;
|
}
|
}
|
}
|
}
|
else if (sym->section->flags & SEC_CODE)
|
else if (sym->section->flags & SEC_CODE)
|
{
|
{
|
if (sym->flags & BSF_GLOBAL)
|
if (sym->flags & BSF_GLOBAL)
|
{
|
{
|
ms_type = mst_text;
|
ms_type = mst_text;
|
}
|
}
|
else if ((sym->name[0] == '.' && sym->name[1] == 'L')
|
else if ((sym->name[0] == '.' && sym->name[1] == 'L')
|
|| ((sym->flags & BSF_LOCAL)
|
|| ((sym->flags & BSF_LOCAL)
|
&& sym->name[0] == '$'
|
&& sym->name[0] == '$'
|
&& sym->name[1] == 'L'))
|
&& sym->name[1] == 'L'))
|
/* Looks like a compiler-generated label. Skip it.
|
/* Looks like a compiler-generated label. Skip it.
|
The assembler should be skipping these (to keep
|
The assembler should be skipping these (to keep
|
executables small), but apparently with gcc on the
|
executables small), but apparently with gcc on the
|
delta m88k SVR4, it loses. So to have us check too
|
delta m88k SVR4, it loses. So to have us check too
|
should be harmless (but I encourage people to fix this
|
should be harmless (but I encourage people to fix this
|
in the assembler instead of adding checks here). */
|
in the assembler instead of adding checks here). */
|
continue;
|
continue;
|
#ifdef HARRIS_TARGET
|
#ifdef HARRIS_TARGET
|
else if (sym->name[0] == '.' && sym->name[1] == '.')
|
else if (sym->name[0] == '.' && sym->name[1] == '.')
|
{
|
{
|
/* Looks like a Harris compiler generated label for the
|
/* Looks like a Harris compiler generated label for the
|
purpose of marking instructions that are relevant to
|
purpose of marking instructions that are relevant to
|
DWARF dies. The assembler can't get rid of these
|
DWARF dies. The assembler can't get rid of these
|
because they are relocatable addresses that the
|
because they are relocatable addresses that the
|
linker needs to resolve. */
|
linker needs to resolve. */
|
continue;
|
continue;
|
}
|
}
|
#endif
|
#endif
|
else
|
else
|
{
|
{
|
ms_type = mst_file_text;
|
ms_type = mst_file_text;
|
}
|
}
|
}
|
}
|
else if (sym->section->flags & SEC_ALLOC)
|
else if (sym->section->flags & SEC_ALLOC)
|
{
|
{
|
if (sym->flags & BSF_GLOBAL)
|
if (sym->flags & BSF_GLOBAL)
|
{
|
{
|
if (sym->section->flags & SEC_LOAD)
|
if (sym->section->flags & SEC_LOAD)
|
{
|
{
|
ms_type = mst_data;
|
ms_type = mst_data;
|
}
|
}
|
else
|
else
|
{
|
{
|
ms_type = mst_bss;
|
ms_type = mst_bss;
|
}
|
}
|
}
|
}
|
else if (sym->flags & BSF_LOCAL)
|
else if (sym->flags & BSF_LOCAL)
|
{
|
{
|
/* Named Local variable in a Data section. Check its
|
/* Named Local variable in a Data section. Check its
|
name for stabs-in-elf. The STREQ macro checks the
|
name for stabs-in-elf. The STREQ macro checks the
|
first character inline, so we only actually do a
|
first character inline, so we only actually do a
|
strcmp function call on names that start with 'B'
|
strcmp function call on names that start with 'B'
|
or 'D' */
|
or 'D' */
|
index = SECT_OFF_MAX;
|
index = SECT_OFF_MAX;
|
if (STREQ ("Bbss.bss", sym->name))
|
if (STREQ ("Bbss.bss", sym->name))
|
{
|
{
|
index = SECT_OFF_BSS;
|
index = SECT_OFF_BSS;
|
}
|
}
|
else if (STREQ ("Ddata.data", sym->name))
|
else if (STREQ ("Ddata.data", sym->name))
|
{
|
{
|
index = SECT_OFF_DATA;
|
index = SECT_OFF_DATA;
|
}
|
}
|
else if (STREQ ("Drodata.rodata", sym->name))
|
else if (STREQ ("Drodata.rodata", sym->name))
|
{
|
{
|
index = SECT_OFF_RODATA;
|
index = SECT_OFF_RODATA;
|
}
|
}
|
if (index != SECT_OFF_MAX)
|
if (index != SECT_OFF_MAX)
|
{
|
{
|
/* Found a special local symbol. Allocate a
|
/* Found a special local symbol. Allocate a
|
sectinfo, if needed, and fill it in. */
|
sectinfo, if needed, and fill it in. */
|
if (sectinfo == NULL)
|
if (sectinfo == NULL)
|
{
|
{
|
sectinfo = (struct stab_section_info *)
|
sectinfo = (struct stab_section_info *)
|
xmmalloc (objfile->md, sizeof (*sectinfo));
|
xmmalloc (objfile->md, sizeof (*sectinfo));
|
memset ((PTR) sectinfo, 0, sizeof (*sectinfo));
|
memset ((PTR) sectinfo, 0, sizeof (*sectinfo));
|
if (filesym == NULL)
|
if (filesym == NULL)
|
{
|
{
|
complain (§ion_info_complaint,
|
complain (§ion_info_complaint,
|
sym->name);
|
sym->name);
|
}
|
}
|
else
|
else
|
{
|
{
|
sectinfo->filename =
|
sectinfo->filename =
|
(char *) filesym->name;
|
(char *) filesym->name;
|
}
|
}
|
}
|
}
|
if (sectinfo->sections[index] != 0)
|
if (sectinfo->sections[index] != 0)
|
{
|
{
|
complain (§ion_info_dup_complaint,
|
complain (§ion_info_dup_complaint,
|
sectinfo->filename);
|
sectinfo->filename);
|
}
|
}
|
/* Bfd symbols are section relative. */
|
/* Bfd symbols are section relative. */
|
symaddr = sym->value + sym->section->vma;
|
symaddr = sym->value + sym->section->vma;
|
/* Relocate non-absolute symbols by the section offset. */
|
/* Relocate non-absolute symbols by the section offset. */
|
if (sym->section != &bfd_abs_section)
|
if (sym->section != &bfd_abs_section)
|
{
|
{
|
symaddr += offset;
|
symaddr += offset;
|
}
|
}
|
sectinfo->sections[index] = symaddr;
|
sectinfo->sections[index] = symaddr;
|
/* The special local symbols don't go in the
|
/* The special local symbols don't go in the
|
minimal symbol table, so ignore this one. */
|
minimal symbol table, so ignore this one. */
|
continue;
|
continue;
|
}
|
}
|
/* Not a special stabs-in-elf symbol, do regular
|
/* Not a special stabs-in-elf symbol, do regular
|
symbol processing. */
|
symbol processing. */
|
if (sym->section->flags & SEC_LOAD)
|
if (sym->section->flags & SEC_LOAD)
|
{
|
{
|
ms_type = mst_file_data;
|
ms_type = mst_file_data;
|
}
|
}
|
else
|
else
|
{
|
{
|
ms_type = mst_file_bss;
|
ms_type = mst_file_bss;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
ms_type = mst_unknown;
|
ms_type = mst_unknown;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
/* FIXME: Solaris2 shared libraries include lots of
|
/* FIXME: Solaris2 shared libraries include lots of
|
odd "absolute" and "undefined" symbols, that play
|
odd "absolute" and "undefined" symbols, that play
|
hob with actions like finding what function the PC
|
hob with actions like finding what function the PC
|
is in. Ignore them if they aren't text, data, or bss. */
|
is in. Ignore them if they aren't text, data, or bss. */
|
/* ms_type = mst_unknown; */
|
/* ms_type = mst_unknown; */
|
continue; /* Skip this symbol. */
|
continue; /* Skip this symbol. */
|
}
|
}
|
/* Pass symbol size field in via BFD. FIXME!!! */
|
/* Pass symbol size field in via BFD. FIXME!!! */
|
size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
|
size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
|
msym = record_minimal_symbol_and_info
|
msym = record_minimal_symbol_and_info
|
((char *) sym->name, symaddr,
|
((char *) sym->name, symaddr,
|
ms_type, (PTR) size, sym->section, objfile);
|
ms_type, (PTR) size, sym->section, objfile);
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
if (msym != NULL)
|
if (msym != NULL)
|
msym->filename = filesymname;
|
msym->filename = filesymname;
|
#endif
|
#endif
|
#ifdef ELF_MAKE_MSYMBOL_SPECIAL
|
#ifdef ELF_MAKE_MSYMBOL_SPECIAL
|
ELF_MAKE_MSYMBOL_SPECIAL (sym, msym);
|
ELF_MAKE_MSYMBOL_SPECIAL (sym, msym);
|
#endif
|
#endif
|
}
|
}
|
}
|
}
|
do_cleanups (back_to);
|
do_cleanups (back_to);
|
}
|
}
|
}
|
}
|
|
|
/* Scan and build partial symbols for a symbol file.
|
/* Scan and build partial symbols for a symbol file.
|
We have been initialized by a call to elf_symfile_init, which
|
We have been initialized by a call to elf_symfile_init, which
|
currently does nothing.
|
currently does nothing.
|
|
|
SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
|
SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
|
in each section. We simplify it down to a single offset for all
|
in each section. We simplify it down to a single offset for all
|
symbols. FIXME.
|
symbols. FIXME.
|
|
|
MAINLINE is true if we are reading the main symbol
|
MAINLINE is true if we are reading the main symbol
|
table (as opposed to a shared lib or dynamically loaded file).
|
table (as opposed to a shared lib or dynamically loaded file).
|
|
|
This function only does the minimum work necessary for letting the
|
This function only does the minimum work necessary for letting the
|
user "name" things symbolically; it does not read the entire symtab.
|
user "name" things symbolically; it does not read the entire symtab.
|
Instead, it reads the external and static symbols and puts them in partial
|
Instead, it reads the external and static symbols and puts them in partial
|
symbol tables. When more extensive information is requested of a
|
symbol tables. When more extensive information is requested of a
|
file, the corresponding partial symbol table is mutated into a full
|
file, the corresponding partial symbol table is mutated into a full
|
fledged symbol table by going back and reading the symbols
|
fledged symbol table by going back and reading the symbols
|
for real.
|
for real.
|
|
|
We look for sections with specific names, to tell us what debug
|
We look for sections with specific names, to tell us what debug
|
format to look for: FIXME!!!
|
format to look for: FIXME!!!
|
|
|
dwarf_build_psymtabs() builds psymtabs for DWARF symbols;
|
dwarf_build_psymtabs() builds psymtabs for DWARF symbols;
|
elfstab_build_psymtabs() handles STABS symbols;
|
elfstab_build_psymtabs() handles STABS symbols;
|
mdebug_build_psymtabs() handles ECOFF debugging information.
|
mdebug_build_psymtabs() handles ECOFF debugging information.
|
|
|
Note that ELF files have a "minimal" symbol table, which looks a lot
|
Note that ELF files have a "minimal" symbol table, which looks a lot
|
like a COFF symbol table, but has only the minimal information necessary
|
like a COFF symbol table, but has only the minimal information necessary
|
for linking. We process this also, and use the information to
|
for linking. We process this also, and use the information to
|
build gdb's minimal symbol table. This gives us some minimal debugging
|
build gdb's minimal symbol table. This gives us some minimal debugging
|
capability even for files compiled without -g. */
|
capability even for files compiled without -g. */
|
|
|
static void
|
static void
|
elf_symfile_read (objfile, mainline)
|
elf_symfile_read (objfile, mainline)
|
struct objfile *objfile;
|
struct objfile *objfile;
|
int mainline;
|
int mainline;
|
{
|
{
|
bfd *abfd = objfile->obfd;
|
bfd *abfd = objfile->obfd;
|
struct elfinfo ei;
|
struct elfinfo ei;
|
struct cleanup *back_to;
|
struct cleanup *back_to;
|
CORE_ADDR offset;
|
CORE_ADDR offset;
|
|
|
init_minimal_symbol_collection ();
|
init_minimal_symbol_collection ();
|
back_to = make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
|
back_to = make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
|
|
|
memset ((char *) &ei, 0, sizeof (ei));
|
memset ((char *) &ei, 0, sizeof (ei));
|
|
|
/* Allocate struct to keep track of the symfile */
|
/* Allocate struct to keep track of the symfile */
|
objfile->sym_stab_info = (struct dbx_symfile_info *)
|
objfile->sym_stab_info = (struct dbx_symfile_info *)
|
xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
|
xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
|
memset ((char *) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
|
memset ((char *) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
|
make_cleanup (free_elfinfo, (PTR) objfile);
|
make_cleanup (free_elfinfo, (PTR) objfile);
|
|
|
/* Process the normal ELF symbol table first. This may write some
|
/* Process the normal ELF symbol table first. This may write some
|
chain of info into the dbx_symfile_info in objfile->sym_stab_info,
|
chain of info into the dbx_symfile_info in objfile->sym_stab_info,
|
which can later be used by elfstab_offset_sections. */
|
which can later be used by elfstab_offset_sections. */
|
|
|
elf_symtab_read (objfile, 0);
|
elf_symtab_read (objfile, 0);
|
|
|
/* Add the dynamic symbols. */
|
/* Add the dynamic symbols. */
|
|
|
elf_symtab_read (objfile, 1);
|
elf_symtab_read (objfile, 1);
|
|
|
/* Now process debugging information, which is contained in
|
/* Now process debugging information, which is contained in
|
special ELF sections. */
|
special ELF sections. */
|
|
|
/* If we are reinitializing, or if we have never loaded syms yet,
|
/* If we are reinitializing, or if we have never loaded syms yet,
|
set table to empty. MAINLINE is cleared so that *_read_psymtab
|
set table to empty. MAINLINE is cleared so that *_read_psymtab
|
functions do not all also re-initialize the psymbol table. */
|
functions do not all also re-initialize the psymbol table. */
|
if (mainline)
|
if (mainline)
|
{
|
{
|
init_psymbol_list (objfile, 0);
|
init_psymbol_list (objfile, 0);
|
mainline = 0;
|
mainline = 0;
|
}
|
}
|
|
|
/* We first have to find them... */
|
/* We first have to find them... */
|
bfd_map_over_sections (abfd, elf_locate_sections, (PTR) & ei);
|
bfd_map_over_sections (abfd, elf_locate_sections, (PTR) & ei);
|
|
|
/* ELF debugging information is inserted into the psymtab in the
|
/* ELF debugging information is inserted into the psymtab in the
|
order of least informative first - most informative last. Since
|
order of least informative first - most informative last. Since
|
the psymtab table is searched `most recent insertion first' this
|
the psymtab table is searched `most recent insertion first' this
|
increases the probability that more detailed debug information
|
increases the probability that more detailed debug information
|
for a section is found.
|
for a section is found.
|
|
|
For instance, an object file might contain both .mdebug (XCOFF)
|
For instance, an object file might contain both .mdebug (XCOFF)
|
and .debug_info (DWARF2) sections then .mdebug is inserted first
|
and .debug_info (DWARF2) sections then .mdebug is inserted first
|
(searched last) and DWARF2 is inserted last (searched first). If
|
(searched last) and DWARF2 is inserted last (searched first). If
|
we don't do this then the XCOFF info is found first - for code in
|
we don't do this then the XCOFF info is found first - for code in
|
an included file XCOFF info is useless. */
|
an included file XCOFF info is useless. */
|
|
|
if (ei.mdebugsect)
|
if (ei.mdebugsect)
|
{
|
{
|
const struct ecoff_debug_swap *swap;
|
const struct ecoff_debug_swap *swap;
|
|
|
/* .mdebug section, presumably holding ECOFF debugging
|
/* .mdebug section, presumably holding ECOFF debugging
|
information. */
|
information. */
|
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
if (swap)
|
if (swap)
|
elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect);
|
elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect);
|
}
|
}
|
if (ei.stabsect)
|
if (ei.stabsect)
|
{
|
{
|
asection *str_sect;
|
asection *str_sect;
|
|
|
/* Stab sections have an associated string table that looks like
|
/* Stab sections have an associated string table that looks like
|
a separate section. */
|
a separate section. */
|
str_sect = bfd_get_section_by_name (abfd, ".stabstr");
|
str_sect = bfd_get_section_by_name (abfd, ".stabstr");
|
|
|
/* FIXME should probably warn about a stab section without a stabstr. */
|
/* FIXME should probably warn about a stab section without a stabstr. */
|
if (str_sect)
|
if (str_sect)
|
elfstab_build_psymtabs (objfile,
|
elfstab_build_psymtabs (objfile,
|
mainline,
|
mainline,
|
ei.stabsect->filepos,
|
ei.stabsect->filepos,
|
bfd_section_size (abfd, ei.stabsect),
|
bfd_section_size (abfd, ei.stabsect),
|
str_sect->filepos,
|
str_sect->filepos,
|
bfd_section_size (abfd, str_sect));
|
bfd_section_size (abfd, str_sect));
|
}
|
}
|
if (dwarf2_has_info (abfd))
|
if (dwarf2_has_info (abfd))
|
{
|
{
|
/* DWARF 2 sections */
|
/* DWARF 2 sections */
|
dwarf2_build_psymtabs (objfile, mainline);
|
dwarf2_build_psymtabs (objfile, mainline);
|
}
|
}
|
else if (ei.dboffset && ei.lnoffset)
|
else if (ei.dboffset && ei.lnoffset)
|
{
|
{
|
/* DWARF sections */
|
/* DWARF sections */
|
dwarf_build_psymtabs (objfile,
|
dwarf_build_psymtabs (objfile,
|
mainline,
|
mainline,
|
ei.dboffset, ei.dbsize,
|
ei.dboffset, ei.dbsize,
|
ei.lnoffset, ei.lnsize);
|
ei.lnoffset, ei.lnsize);
|
}
|
}
|
|
|
/* Install any minimal symbols that have been collected as the current
|
/* Install any minimal symbols that have been collected as the current
|
minimal symbols for this objfile. */
|
minimal symbols for this objfile. */
|
|
|
install_minimal_symbols (objfile);
|
install_minimal_symbols (objfile);
|
|
|
do_cleanups (back_to);
|
do_cleanups (back_to);
|
}
|
}
|
|
|
/* This cleans up the objfile's sym_stab_info pointer, and the chain of
|
/* This cleans up the objfile's sym_stab_info pointer, and the chain of
|
stab_section_info's, that might be dangling from it. */
|
stab_section_info's, that might be dangling from it. */
|
|
|
static void
|
static void
|
free_elfinfo (objp)
|
free_elfinfo (objp)
|
PTR objp;
|
PTR objp;
|
{
|
{
|
struct objfile *objfile = (struct objfile *) objp;
|
struct objfile *objfile = (struct objfile *) objp;
|
struct dbx_symfile_info *dbxinfo = objfile->sym_stab_info;
|
struct dbx_symfile_info *dbxinfo = objfile->sym_stab_info;
|
struct stab_section_info *ssi, *nssi;
|
struct stab_section_info *ssi, *nssi;
|
|
|
ssi = dbxinfo->stab_section_info;
|
ssi = dbxinfo->stab_section_info;
|
while (ssi)
|
while (ssi)
|
{
|
{
|
nssi = ssi->next;
|
nssi = ssi->next;
|
mfree (objfile->md, ssi);
|
mfree (objfile->md, ssi);
|
ssi = nssi;
|
ssi = nssi;
|
}
|
}
|
|
|
dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
|
dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
|
}
|
}
|
|
|
|
|
/* Initialize anything that needs initializing when a completely new symbol
|
/* Initialize anything that needs initializing when a completely new symbol
|
file is specified (not just adding some symbols from another file, e.g. a
|
file is specified (not just adding some symbols from another file, e.g. a
|
shared library).
|
shared library).
|
|
|
We reinitialize buildsym, since we may be reading stabs from an ELF file. */
|
We reinitialize buildsym, since we may be reading stabs from an ELF file. */
|
|
|
static void
|
static void
|
elf_new_init (ignore)
|
elf_new_init (ignore)
|
struct objfile *ignore;
|
struct objfile *ignore;
|
{
|
{
|
stabsread_new_init ();
|
stabsread_new_init ();
|
buildsym_new_init ();
|
buildsym_new_init ();
|
}
|
}
|
|
|
/* Perform any local cleanups required when we are done with a particular
|
/* 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
|
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
|
for an objfile, freeing up all memory held for it, and unlinking the
|
objfile struct from the global list of known objfiles. */
|
objfile struct from the global list of known objfiles. */
|
|
|
static void
|
static void
|
elf_symfile_finish (objfile)
|
elf_symfile_finish (objfile)
|
struct objfile *objfile;
|
struct objfile *objfile;
|
{
|
{
|
if (objfile->sym_stab_info != NULL)
|
if (objfile->sym_stab_info != NULL)
|
{
|
{
|
mfree (objfile->md, objfile->sym_stab_info);
|
mfree (objfile->md, objfile->sym_stab_info);
|
}
|
}
|
}
|
}
|
|
|
/* ELF specific initialization routine for reading symbols.
|
/* ELF specific initialization routine for reading symbols.
|
|
|
It is passed a pointer to a struct sym_fns which contains, among other
|
It is passed a pointer to a struct sym_fns which contains, among other
|
things, the BFD for the file whose symbols are being read, and a slot for
|
things, the BFD for the file whose symbols are being read, and a slot for
|
a pointer to "private data" which we can fill with goodies.
|
a pointer to "private data" which we can fill with goodies.
|
|
|
For now at least, we have nothing in particular to do, so this function is
|
For now at least, we have nothing in particular to do, so this function is
|
just a stub. */
|
just a stub. */
|
|
|
static void
|
static void
|
elf_symfile_init (objfile)
|
elf_symfile_init (objfile)
|
struct objfile *objfile;
|
struct objfile *objfile;
|
{
|
{
|
/* ELF objects may be reordered, so set OBJF_REORDERED. If we
|
/* ELF objects may be reordered, so set OBJF_REORDERED. If we
|
find this causes a significant slowdown in gdb then we could
|
find this causes a significant slowdown in gdb then we could
|
set it in the debug symbol readers only when necessary. */
|
set it in the debug symbol readers only when necessary. */
|
objfile->flags |= OBJF_REORDERED;
|
objfile->flags |= OBJF_REORDERED;
|
}
|
}
|
|
|
/* When handling an ELF file that contains Sun STABS debug info,
|
/* When handling an ELF file that contains Sun STABS debug info,
|
some of the debug info is relative to the particular chunk of the
|
some of the debug info is relative to the particular chunk of the
|
section that was generated in its individual .o file. E.g.
|
section that was generated in its individual .o file. E.g.
|
offsets to static variables are relative to the start of the data
|
offsets to static variables are relative to the start of the data
|
segment *for that module before linking*. This information is
|
segment *for that module before linking*. This information is
|
painfully squirreled away in the ELF symbol table as local symbols
|
painfully squirreled away in the ELF symbol table as local symbols
|
with wierd names. Go get 'em when needed. */
|
with wierd names. Go get 'em when needed. */
|
|
|
void
|
void
|
elfstab_offset_sections (objfile, pst)
|
elfstab_offset_sections (objfile, pst)
|
struct objfile *objfile;
|
struct objfile *objfile;
|
struct partial_symtab *pst;
|
struct partial_symtab *pst;
|
{
|
{
|
char *filename = pst->filename;
|
char *filename = pst->filename;
|
struct dbx_symfile_info *dbx = objfile->sym_stab_info;
|
struct dbx_symfile_info *dbx = objfile->sym_stab_info;
|
struct stab_section_info *maybe = dbx->stab_section_info;
|
struct stab_section_info *maybe = dbx->stab_section_info;
|
struct stab_section_info *questionable = 0;
|
struct stab_section_info *questionable = 0;
|
int i;
|
int i;
|
char *p;
|
char *p;
|
|
|
/* The ELF symbol info doesn't include path names, so strip the path
|
/* The ELF symbol info doesn't include path names, so strip the path
|
(if any) from the psymtab filename. */
|
(if any) from the psymtab filename. */
|
while (0 != (p = strchr (filename, '/')))
|
while (0 != (p = strchr (filename, '/')))
|
filename = p + 1;
|
filename = p + 1;
|
|
|
/* FIXME: This linear search could speed up significantly
|
/* FIXME: This linear search could speed up significantly
|
if it was chained in the right order to match how we search it,
|
if it was chained in the right order to match how we search it,
|
and if we unchained when we found a match. */
|
and if we unchained when we found a match. */
|
for (; maybe; maybe = maybe->next)
|
for (; maybe; maybe = maybe->next)
|
{
|
{
|
if (filename[0] == maybe->filename[0]
|
if (filename[0] == maybe->filename[0]
|
&& STREQ (filename, maybe->filename))
|
&& STREQ (filename, maybe->filename))
|
{
|
{
|
/* We found a match. But there might be several source files
|
/* We found a match. But there might be several source files
|
(from different directories) with the same name. */
|
(from different directories) with the same name. */
|
if (0 == maybe->found)
|
if (0 == maybe->found)
|
break;
|
break;
|
questionable = maybe; /* Might use it later. */
|
questionable = maybe; /* Might use it later. */
|
}
|
}
|
}
|
}
|
|
|
if (maybe == 0 && questionable != 0)
|
if (maybe == 0 && questionable != 0)
|
{
|
{
|
complain (&stab_info_questionable_complaint, filename);
|
complain (&stab_info_questionable_complaint, filename);
|
maybe = questionable;
|
maybe = questionable;
|
}
|
}
|
|
|
if (maybe)
|
if (maybe)
|
{
|
{
|
/* Found it! Allocate a new psymtab struct, and fill it in. */
|
/* Found it! Allocate a new psymtab struct, and fill it in. */
|
maybe->found++;
|
maybe->found++;
|
pst->section_offsets = (struct section_offsets *)
|
pst->section_offsets = (struct section_offsets *)
|
obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
|
obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
|
for (i = 0; i < SECT_OFF_MAX; i++)
|
for (i = 0; i < SECT_OFF_MAX; i++)
|
ANOFFSET (pst->section_offsets, i) = maybe->sections[i];
|
ANOFFSET (pst->section_offsets, i) = maybe->sections[i];
|
return;
|
return;
|
}
|
}
|
|
|
/* We were unable to find any offsets for this file. Complain. */
|
/* We were unable to find any offsets for this file. Complain. */
|
if (dbx->stab_section_info) /* If there *is* any info, */
|
if (dbx->stab_section_info) /* If there *is* any info, */
|
complain (&stab_info_mismatch_complaint, filename);
|
complain (&stab_info_mismatch_complaint, filename);
|
}
|
}
|
|
|
/* Register that we are able to handle ELF object file formats. */
|
/* Register that we are able to handle ELF object file formats. */
|
|
|
static struct sym_fns elf_sym_fns =
|
static struct sym_fns elf_sym_fns =
|
{
|
{
|
bfd_target_elf_flavour,
|
bfd_target_elf_flavour,
|
elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
elf_symfile_read, /* sym_read: read a symbol file into symtab */
|
elf_symfile_read, /* sym_read: read a symbol file into symtab */
|
elf_symfile_finish, /* sym_finish: finished with file, cleanup */
|
elf_symfile_finish, /* sym_finish: finished with file, cleanup */
|
default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
|
default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
|
NULL /* next: pointer to next struct sym_fns */
|
NULL /* next: pointer to next struct sym_fns */
|
};
|
};
|
|
|
void
|
void
|
_initialize_elfread ()
|
_initialize_elfread ()
|
{
|
{
|
add_symtab_fns (&elf_sym_fns);
|
add_symtab_fns (&elf_sym_fns);
|
}
|
}
|
|
|
