135 lines
4.3 KiB
C++
135 lines
4.3 KiB
C++
/*
|
|
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code 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
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#include "precompiled.hpp"
|
|
|
|
#if !defined(_WINDOWS) && !defined(__APPLE__)
|
|
|
|
#include "memory/allocation.inline.hpp"
|
|
#include "utilities/elfFuncDescTable.hpp"
|
|
#include "utilities/elfSymbolTable.hpp"
|
|
|
|
ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) {
|
|
assert(file, "null file handle");
|
|
m_symbols = NULL;
|
|
m_next = NULL;
|
|
m_file = file;
|
|
m_status = NullDecoder::no_error;
|
|
|
|
// try to load the string table
|
|
long cur_offset = ftell(file);
|
|
if (cur_offset != -1) {
|
|
// call malloc so we can back up if memory allocation fails.
|
|
m_symbols = (Elf_Sym*)os::malloc(shdr.sh_size, mtInternal);
|
|
if (m_symbols) {
|
|
if (fseek(file, shdr.sh_offset, SEEK_SET) ||
|
|
fread((void*)m_symbols, shdr.sh_size, 1, file) != 1 ||
|
|
fseek(file, cur_offset, SEEK_SET)) {
|
|
m_status = NullDecoder::file_invalid;
|
|
os::free(m_symbols);
|
|
m_symbols = NULL;
|
|
}
|
|
}
|
|
if (!NullDecoder::is_error(m_status)) {
|
|
memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr));
|
|
}
|
|
} else {
|
|
m_status = NullDecoder::file_invalid;
|
|
}
|
|
}
|
|
|
|
ElfSymbolTable::~ElfSymbolTable() {
|
|
if (m_symbols != NULL) {
|
|
os::free(m_symbols);
|
|
}
|
|
|
|
if (m_next != NULL) {
|
|
delete m_next;
|
|
}
|
|
}
|
|
|
|
bool ElfSymbolTable::compare(const Elf_Sym* sym, address addr, int* stringtableIndex, int* posIndex, int* offset, ElfFuncDescTable* funcDescTable) {
|
|
if (STT_FUNC == ELF_ST_TYPE(sym->st_info)) {
|
|
Elf_Word st_size = sym->st_size;
|
|
address sym_addr;
|
|
if (funcDescTable != NULL && funcDescTable->get_index() == sym->st_shndx) {
|
|
// We need to go another step trough the function descriptor table (currently PPC64 only)
|
|
sym_addr = funcDescTable->lookup(sym->st_value);
|
|
} else {
|
|
sym_addr = (address)sym->st_value;
|
|
}
|
|
if (sym_addr <= addr && (Elf_Word)(addr - sym_addr) < st_size) {
|
|
*offset = (int)(addr - sym_addr);
|
|
*posIndex = sym->st_name;
|
|
*stringtableIndex = m_shdr.sh_link;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset, ElfFuncDescTable* funcDescTable) {
|
|
assert(stringtableIndex, "null string table index pointer");
|
|
assert(posIndex, "null string table offset pointer");
|
|
assert(offset, "null offset pointer");
|
|
|
|
if (NullDecoder::is_error(m_status)) {
|
|
return false;
|
|
}
|
|
|
|
size_t sym_size = sizeof(Elf_Sym);
|
|
assert((m_shdr.sh_size % sym_size) == 0, "check size");
|
|
int count = m_shdr.sh_size / sym_size;
|
|
if (m_symbols != NULL) {
|
|
for (int index = 0; index < count; index ++) {
|
|
if (compare(&m_symbols[index], addr, stringtableIndex, posIndex, offset, funcDescTable)) {
|
|
return true;
|
|
}
|
|
}
|
|
} else {
|
|
long cur_pos;
|
|
if ((cur_pos = ftell(m_file)) == -1 ||
|
|
fseek(m_file, m_shdr.sh_offset, SEEK_SET)) {
|
|
m_status = NullDecoder::file_invalid;
|
|
return false;
|
|
}
|
|
|
|
Elf_Sym sym;
|
|
for (int index = 0; index < count; index ++) {
|
|
if (fread(&sym, sym_size, 1, m_file) == 1) {
|
|
if (compare(&sym, addr, stringtableIndex, posIndex, offset, funcDescTable)) {
|
|
return true;
|
|
}
|
|
} else {
|
|
m_status = NullDecoder::file_invalid;
|
|
return false;
|
|
}
|
|
}
|
|
fseek(m_file, cur_pos, SEEK_SET);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#endif // !_WINDOWS && !__APPLE__
|