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/*
* 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_loader.h"
#include "compiled_method.h"
#include "elf_image.h"
#include "logging.h"
#include "oat_file.h"
#include "object.h"
#include "runtime_support_llvm.h"
#include "utils_llvm.h"
#include <android/librsloader.h>
namespace art {
namespace compiler_llvm {
ElfLoader::~ElfLoader() {
// Release every ELF object
for (size_t i = 0; i < executables_.size(); ++i) {
rsloaderDisposeExec(executables_[i]);
}
}
bool ElfLoader::LoadElfAt(size_t elf_idx,
const ElfImage& elf_image,
OatFile::RelocationBehavior reloc) {
if (elf_idx < executables_.size() && executables_[elf_idx] != NULL) {
return false;
}
if (elf_idx >= executables_.size()) {
executables_.resize(elf_idx + 1);
elf_images_.resize(elf_idx + 1);
}
RSExecRef executable = rsloaderLoadExecutable(elf_image.begin(),
elf_image.size(),
reloc == OatFile::kRelocNone ? 1 : 0);
if (executable == NULL) {
LOG(WARNING) << "Failed to load ELF"
<< " image: " << static_cast<const void*>(elf_image.begin())
<< " size: " << elf_image.size();
return false;
}
if (reloc == OatFile::kRelocAll) {
if (!rsloaderRelocateExecutable(executable,
art_find_runtime_support_func, NULL)) {
LOG(ERROR) << "Failed to relocate the ELF image";
rsloaderDisposeExec(executable);
return false;
}
relocated = true;
}
executables_[elf_idx] = executable;
elf_images_[elf_idx] = elf_image;
return true;
}
void ElfLoader::RelocateExecutable() {
if (relocated) {
return;
}
LOG(INFO) << "Reload ELF for relocate.";
for (size_t i = 0; i < executables_.size(); ++i) {
if (executables_[i] != NULL) {
// TODO: After implement in-place linking, we will no longer need to dispose and reload.
rsloaderDisposeExec(executables_[i]);
executables_[i] = rsloaderLoadExecutable(elf_images_[i].begin(), elf_images_[i].size(), 0);
if (executables_[i] == NULL) {
LOG(FATAL) << "Failed to reload ELF image " << i;
}
if (!rsloaderRelocateExecutable(executables_[i],
art_find_runtime_support_func, NULL)) {
LOG(FATAL) << "Failed to relocate ELF image " << i;
}
}
}
relocated = true;
}
const void* ElfLoader::GetMethodCodeAddr(uint16_t elf_idx,
uint16_t elf_func_idx) const {
CHECK_LT(elf_idx, executables_.size());
return GetAddr(elf_idx, ElfFuncName(elf_func_idx).c_str());
}
const Method::InvokeStub* ElfLoader::
GetMethodInvokeStubAddr(uint16_t elf_idx, uint16_t elf_func_idx) const {
CHECK_LT(elf_idx, executables_.size());
return reinterpret_cast<const Method::InvokeStub*>(
GetAddr(elf_idx, ElfFuncName(elf_func_idx).c_str()));
}
size_t ElfLoader::GetCodeSize(uint16_t elf_idx, uint16_t elf_func_idx) const {
CHECK_LT(elf_idx, executables_.size());
CHECK(executables_[elf_idx] != NULL);
return rsloaderGetSymbolSize(executables_[elf_idx],
ElfFuncName(elf_func_idx).c_str());
}
const void* ElfLoader::GetAddr(size_t elf_idx, const char* sym_name) const {
CHECK_LT(elf_idx, executables_.size());
CHECK(executables_[elf_idx] != NULL);
return rsloaderGetSymbolAddress(executables_[elf_idx], sym_name);
}
} // namespace compiler_llvm
} // namespace art
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