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/* Copyright (C) 2003 MontaVista Software, Inc.
Written by Daniel Jacobowitz <drow@mvista.com>, 2003
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
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <config.h>
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "prelinktab.h"
#include "reloc.h"
#include "ld-libs.h"
#ifndef ElfW
/* Default to 32-bit. */
#define ElfW(x) Elf32_##x
#define ELFW(x) ELF32_##x
#endif
static int _dl_soname_match_p (const char *name, struct ldlibs_link_map *map);
struct sym_val
{
const ElfW(Sym) *s;
struct ldlibs_link_map *m;
};
#include "ld-do-lookup.h"
#define VERSIONED 1
#include "ld-do-lookup.h"
#undef VERSIONED
static unsigned long
rtld_elf_hash (const char *name)
{
const unsigned char *str = (const unsigned char *) name;
unsigned long int hash, hi;
hash = *str++;
while (*str != '\0')
{
hash = (hash << 4) + *str++;
hi = hash & 0xf0000000;
hash ^= hi;
hash ^= hi >> 24;
}
return hash & 0xffffffff;
}
static int
_dl_soname_match_p (const char *name, struct ldlibs_link_map *map)
{
if (strcmp (name, map->l_name) == 0)
return 1;
if (strcmp (name, map->l_soname) == 0)
return 1;
return 0;
}
#if 0
void
rtld_lookup_symbol (const char *name, const ElfW(Sym) *sym,
struct r_scope_elem *scope, int rtypeclass,
struct ldlibs_link_map *undef_map, int machine)
{
int ret;
struct sym_val result;
result.s = NULL;
ret = do_lookup (name, rtld_elf_hash (name), sym,
&result, scope, 0, 0, NULL, rtypeclass);
if (ret > 0)
printf ("name %s /%d\n", name, rtypeclass);
#if 0
printf ("name %s ret %d", name, ret);
if (result.s)
printf (" result sym 0x%08x (in %s)", result.s->st_value, result.m->l_name);
printf ("\n");
#endif
}
#endif
void
rtld_lookup_symbol (const char *name, const ElfW(Sym) *sym,
struct r_scope_elem *scope,
int rtypeclass,
struct ldlibs_link_map *undef_map, int machine)
{
rtld_lookup_symbol_versioned (name, sym, scope, NULL, rtypeclass, undef_map, machine);
}
void
rtld_lookup_symbol_versioned (const char *name, const ElfW(Sym) *sym,
struct r_scope_elem *scope,
struct r_found_version *version, int rtypeclass,
struct ldlibs_link_map *undef_map, int machine)
{
int ret;
int conflict = 0;
int sym_offset;
struct sym_val result, result2;
unsigned int value1, value2;
result.s = NULL;
result.m = NULL;
result2.s = NULL;
result2.m = NULL;
if (version)
ret = do_lookup_versioned (name, rtld_elf_hash (name), sym,
&result, scope, 0, version, NULL, rtypeclass,
machine);
else
ret = do_lookup (name, rtld_elf_hash (name), sym,
&result, scope, 0, 0, NULL, rtypeclass,
machine);
if (result.s == NULL && ELFW(ST_BIND) (sym->st_info) != STB_WEAK)
printf ("undefined symbol: %s\t(%s)\n", name, undef_map->filename);
if (ret <= 0)
return;
/* Don't do conflict checking for references in the executable. */
if (undef_map->l_local_scope != scope)
{
result2.s = NULL;
result2.m = NULL;
if (version)
ret = do_lookup_versioned (name, rtld_elf_hash (name), sym,
&result2, undef_map->l_local_scope, 0, version,
NULL, rtypeclass, machine);
else
ret = do_lookup (name, rtld_elf_hash (name), sym,
&result2, undef_map->l_local_scope, 0, 0,
NULL, rtypeclass, machine);
if (result2.s != result.s
|| result2.m != result.m)
conflict = 1;
}
if (result.s && ELFW(ST_TYPE) (result.s->st_info) == STT_TLS)
rtypeclass = 4;
/* Print out information for the requested object, all conflicts, and all TLS. */
if (!conflict
&& rtypeclass != 4
&& requested_map
&& requested_map != undef_map)
return;
/* FIXME: Careful with this if we change the size of symbols when reading in! */
sym_offset = ((char *)sym) - ((char *)undef_map->l_info[DT_SYMTAB]);
sym_offset += undef_map->sym_base;
value1 = 0;
if (machine == EM_ARM && result.s
&& ELFW(ST_TYPE) (result.s->st_info) == STT_ARM_TFUNC)
value1 = 1;
value2 = 0;
if (machine == EM_ARM && conflict && result2.s
&& ELFW(ST_TYPE) (result2.s->st_info) == STT_ARM_TFUNC)
value2 = 1;
#if defined(rtld_lookup_symbol) /* 64-bit */
printf ("%s 0x%016" HOST_LONG_LONG_FORMAT "x "
"0x%016" HOST_LONG_LONG_FORMAT "x "
"-> 0x%016" HOST_LONG_LONG_FORMAT "x "
"0x%016" HOST_LONG_LONG_FORMAT "x ",
conflict ? "conflict" : "lookup",
(unsigned long long) undef_map->l_map_start,
(unsigned long long) sym_offset,
(unsigned long long) (result.s ? result.m->l_map_start : 0),
(unsigned long long) (result.s ? result.s->st_value | value1 : 0));
if (conflict)
printf ("x 0x%016" HOST_LONG_LONG_FORMAT "x "
"0x%016" HOST_LONG_LONG_FORMAT "x ",
(unsigned long long) (result2.s ? result2.m->l_map_start : 0),
(unsigned long long) (result2.s ? result2.s->st_value | value2 : 0));
#else
printf ("%s 0x%08x 0x%08x -> 0x%08x 0x%08x ",
conflict ? "conflict" : "lookup",
(uint32_t) undef_map->l_map_start,
(uint32_t) sym_offset,
(uint32_t) (result.s ? result.m->l_map_start : 0),
(uint32_t) (result.s ? result.s->st_value | value1 : 0));
if (conflict)
printf ("x 0x%08x 0x%08x ",
(uint32_t) (result2.s ? result2.m->l_map_start : 0),
(uint32_t) (result2.s ? result2.s->st_value | value2 : 0));
#endif
printf ("/%x %s\n", rtypeclass, name);
}
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