0,0 → 1,117 |
/* |
* 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 <arch.h> |
#include <elf_dyn.h> |
#include <rtld.h> |
|
/** |
* Process (fixup) all relocations in a relocation table. |
*/ |
void rel_table_process(module_t *m, elf_rel_t *rt, size_t rt_size) |
{ |
unsigned bias; |
int i; |
|
size_t rt_entries; |
size_t r_offset; |
elf_word r_info; |
unsigned rel_type; |
elf_word sym_idx; |
// uintptr_t sym_addr; |
|
elf_symbol_t *sym_table; |
elf_symbol_t *sym; |
uint32_t *r_ptr; |
char *str_tab; |
|
printf("parse relocation table\n"); |
|
sym_table = m->dyn.sym_tab; |
bias = m->bias; |
rt_entries = rt_size / sizeof(elf_rel_t); |
str_tab = m->dyn.str_tab; |
|
printf("address: 0x%x, entries: %d\n", (uintptr_t)rt, rt_entries); |
|
for (i = 0; i < rt_entries; ++i) { |
printf("symbol %d: ", i); |
r_offset = rt[i].r_offset; |
r_info = rt[i].r_info; |
|
sym_idx = ELF32_R_SYM(r_info); |
sym = &sym_table[sym_idx]; |
|
printf("name '%s', value 0x%x, size 0x%x\n", |
str_tab + sym->st_name, |
sym->st_value, |
sym->st_size); |
|
rel_type = ELF32_R_TYPE(r_info); |
r_ptr = (uint32_t *)(r_offset + bias); |
|
printf("rel_type: %x, rel_offset: 0x%x\n", rel_type, r_offset); |
/* |
switch (rel_type) { |
case R_386_GLOB_DAT: |
case R_386_JUMP_SLOT: |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_idx); |
kputint(sym_addr); |
|
*r_ptr = sym_addr; |
break; |
|
case R_386_32: |
sym_addr = sym_table[sym_idx].st_value + bias; |
kputint(sym_idx); |
kputint(sym_addr); |
|
*r_ptr += sym_addr; |
break; |
|
case R_386_RELATIVE: |
*r_ptr += bias; |
break; |
}*/ |
} |
|
} |
|
/** @} |
*/ |