summaryrefslogtreecommitdiffstats
path: root/compiler/elf_fixup.cc
diff options
context:
space:
mode:
Diffstat (limited to 'compiler/elf_fixup.cc')
-rw-r--r--compiler/elf_fixup.cc182
1 files changed, 0 insertions, 182 deletions
diff --git a/compiler/elf_fixup.cc b/compiler/elf_fixup.cc
deleted file mode 100644
index 0d34879..0000000
--- a/compiler/elf_fixup.cc
+++ /dev/null
@@ -1,182 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "elf_fixup.h"
-
-#include <inttypes.h>
-#include <memory>
-
-#include "base/logging.h"
-#include "base/stringprintf.h"
-#include "elf_file.h"
-#include "elf_writer.h"
-
-namespace art {
-
-static const bool DEBUG_FIXUP = false;
-
-bool ElfFixup::Fixup(File* file, uintptr_t oat_data_begin) {
- std::string error_msg;
- std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file, true, false, &error_msg));
- CHECK(elf_file.get() != nullptr) << error_msg;
-
- // Lookup "oatdata" symbol address.
- Elf32_Addr oatdata_address = ElfWriter::GetOatDataAddress(elf_file.get());
- Elf32_Off base_address = oat_data_begin - oatdata_address;
-
- if (!FixupDynamic(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed to fixup .dynamic in " << file->GetPath();
- return false;
- }
- if (!FixupSectionHeaders(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed to fixup section headers in " << file->GetPath();
- return false;
- }
- if (!FixupProgramHeaders(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed to fixup program headers in " << file->GetPath();
- return false;
- }
- if (!FixupSymbols(*elf_file.get(), base_address, true)) {
- LOG(WARNING) << "Failed to fixup .dynsym in " << file->GetPath();
- return false;
- }
- if (!FixupSymbols(*elf_file.get(), base_address, false)) {
- LOG(WARNING) << "Failed to fixup .symtab in " << file->GetPath();
- return false;
- }
- if (!FixupRelocations(*elf_file.get(), base_address)) {
- LOG(WARNING) << "Failed to fixup .rel.dyn in " << file->GetPath();
- return false;
- }
- if (!elf_file->FixupDebugSections(base_address)) {
- LOG(WARNING) << "Failed to fixup debug sections in " << file->GetPath();
- return false;
- }
- return true;
-}
-
-
-bool ElfFixup::FixupDynamic(ElfFile& elf_file, uintptr_t base_address) {
- for (Elf32_Word i = 0; i < elf_file.GetDynamicNum(); i++) {
- Elf32_Dyn& elf_dyn = elf_file.GetDynamic(i);
- Elf32_Word d_tag = elf_dyn.d_tag;
- if (IsDynamicSectionPointer(d_tag, elf_file.GetHeader().e_machine)) {
- uint32_t d_ptr = elf_dyn.d_un.d_ptr;
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Dyn[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- d_ptr, d_ptr + base_address);
- }
- d_ptr += base_address;
- elf_dyn.d_un.d_ptr = d_ptr;
- }
- }
- return true;
-}
-
-bool ElfFixup::FixupSectionHeaders(ElfFile& elf_file, uintptr_t base_address) {
- for (Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
- Elf32_Shdr* sh = elf_file.GetSectionHeader(i);
- CHECK(sh != nullptr);
- // 0 implies that the section will not exist in the memory of the process
- if (sh->sh_addr == 0) {
- continue;
- }
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Shdr[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- sh->sh_addr, sh->sh_addr + base_address);
- }
- sh->sh_addr += base_address;
- }
- return true;
-}
-
-bool ElfFixup::FixupProgramHeaders(ElfFile& elf_file, uintptr_t base_address) {
- // TODO: ELFObjectFile doesn't have give to Elf32_Phdr, so we do that ourselves for now.
- for (Elf32_Word i = 0; i < elf_file.GetProgramHeaderNum(); i++) {
- Elf32_Phdr* ph = elf_file.GetProgramHeader(i);
- CHECK(ph != nullptr);
- CHECK_EQ(ph->p_vaddr, ph->p_paddr) << elf_file.GetFile().GetPath() << " i=" << i;
- CHECK((ph->p_align == 0) || (0 == ((ph->p_vaddr - ph->p_offset) & (ph->p_align - 1))))
- << elf_file.GetFile().GetPath() << " i=" << i;
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Phdr[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- ph->p_vaddr, ph->p_vaddr + base_address);
- }
- ph->p_vaddr += base_address;
- ph->p_paddr += base_address;
- CHECK((ph->p_align == 0) || (0 == ((ph->p_vaddr - ph->p_offset) & (ph->p_align - 1))))
- << elf_file.GetFile().GetPath() << " i=" << i;
- }
- return true;
-}
-
-bool ElfFixup::FixupSymbols(ElfFile& elf_file, uintptr_t base_address, bool dynamic) {
- Elf32_Word section_type = dynamic ? SHT_DYNSYM : SHT_SYMTAB;
- // TODO: Unfortunate ELFObjectFile has protected symbol access, so use ElfFile
- Elf32_Shdr* symbol_section = elf_file.FindSectionByType(section_type);
- if (symbol_section == nullptr) {
- // file is missing optional .symtab
- CHECK(!dynamic) << elf_file.GetFile().GetPath();
- return true;
- }
- for (uint32_t i = 0; i < elf_file.GetSymbolNum(*symbol_section); i++) {
- Elf32_Sym* symbol = elf_file.GetSymbol(section_type, i);
- CHECK(symbol != nullptr);
- if (symbol->st_value != 0) {
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Sym[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- symbol->st_value, symbol->st_value + base_address);
- }
- symbol->st_value += base_address;
- }
- }
- return true;
-}
-
-bool ElfFixup::FixupRelocations(ElfFile& elf_file, uintptr_t base_address) {
- for (Elf32_Word i = 0; i < elf_file.GetSectionHeaderNum(); i++) {
- Elf32_Shdr* sh = elf_file.GetSectionHeader(i);
- CHECK(sh != nullptr);
- if (sh->sh_type == SHT_REL) {
- for (uint32_t i = 0; i < elf_file.GetRelNum(*sh); i++) {
- Elf32_Rel& rel = elf_file.GetRel(*sh, i);
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Rel[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- rel.r_offset, rel.r_offset + base_address);
- }
- rel.r_offset += base_address;
- }
- } else if (sh->sh_type == SHT_RELA) {
- for (uint32_t i = 0; i < elf_file.GetRelaNum(*sh); i++) {
- Elf32_Rela& rela = elf_file.GetRela(*sh, i);
- if (DEBUG_FIXUP) {
- LOG(INFO) << StringPrintf("In %s moving Elf32_Rela[%d] from 0x%08x to 0x%08" PRIxPTR,
- elf_file.GetFile().GetPath().c_str(), i,
- rela.r_offset, rela.r_offset + base_address);
- }
- rela.r_offset += base_address;
- }
- }
- }
- return true;
-}
-
-} // namespace art
generated by cgit v1.1 at 2025-02-09 14:29:08 +0000