/*
* Copyright (c) 2008 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup rtld rtld
* @brief
* @{
*/
/**
* @file
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rtld.h>
#include <symbol.h>
#include <elf.h>
static elf_symbol_t *def_find_in_module(char *name, module_t *m)
{
elf_symbol_t *sym_table;
elf_symbol_t *sym;
elf_word nchain;
size_t i;
char *s_name;
char *module_name;
module_name = m->dyn.soname;
printf("def_find_in_module('%s', %s)\n", name
, module_name
);
sym_table = m->dyn.sym_tab;
nchain = m->dyn.hash[1];
for (i = 0; i < nchain; ++i) {
sym = &sym_table[i];
s_name = m->dyn.str_tab + sym->st_name;
printf("cmp sym '%s'\n", s_name
);
if (strcmp(name
, s_name
) == 0) {
if (sym->st_shndx != SHN_UNDEF) {
printf("definition found. idx=%d\n", i
);
return sym;
} else {
}
}
}
return NULL;
}
elf_symbol_t *symbol_def_find(char *name, module_t **m)
{
elf_symbol_t *sym;
sym = def_find_in_module(name, runtime_env.program);
if (sym != NULL) { *m = runtime_env.program; return sym; }
sym = def_find_in_module(name, runtime_env.libc);
if (sym != NULL) { *m = runtime_env.libc; return sym; }
/* sym = def_find_in_module(name, runtime_env.rtld);
if (sym != NULL) { *m = runtime_env.rtld; return sym; }*/
printf("symbol found nowhere\n");
*m = NULL;
return NULL;
}
/** @}
*/