118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "image.h"
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#include "mirror/object_array.h"
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#include "mirror/object_array-inl.h"
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#include "mirror/object-inl.h"
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#include "utils.h"
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namespace art {
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const byte ImageHeader::kImageMagic[] = { 'a', 'r', 't', '\n' };
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const byte ImageHeader::kImageVersion[] = { '0', '1', '2', '\0' };
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ImageHeader::ImageHeader(uint32_t image_begin,
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uint32_t image_size,
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uint32_t image_bitmap_offset,
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uint32_t image_bitmap_size,
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uint32_t image_roots,
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uint32_t oat_checksum,
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uint32_t oat_file_begin,
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uint32_t oat_data_begin,
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uint32_t oat_data_end,
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uint32_t oat_file_end,
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bool compile_pic)
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: image_begin_(image_begin),
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image_size_(image_size),
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image_bitmap_offset_(image_bitmap_offset),
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image_bitmap_size_(image_bitmap_size),
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oat_checksum_(oat_checksum),
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oat_file_begin_(oat_file_begin),
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oat_data_begin_(oat_data_begin),
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oat_data_end_(oat_data_end),
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oat_file_end_(oat_file_end),
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patch_delta_(0),
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image_roots_(image_roots),
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compile_pic_(compile_pic) {
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CHECK_EQ(image_begin, RoundUp(image_begin, kPageSize));
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CHECK_EQ(oat_file_begin, RoundUp(oat_file_begin, kPageSize));
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CHECK_EQ(oat_data_begin, RoundUp(oat_data_begin, kPageSize));
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CHECK_LT(image_begin, image_roots);
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CHECK_LT(image_roots, oat_file_begin);
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CHECK_LE(oat_file_begin, oat_data_begin);
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CHECK_LT(oat_data_begin, oat_data_end);
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CHECK_LE(oat_data_end, oat_file_end);
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memcpy(magic_, kImageMagic, sizeof(kImageMagic));
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memcpy(version_, kImageVersion, sizeof(kImageVersion));
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}
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void ImageHeader::RelocateImage(off_t delta) {
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CHECK_ALIGNED(delta, kPageSize) << " patch delta must be page aligned";
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image_begin_ += delta;
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oat_file_begin_ += delta;
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oat_data_begin_ += delta;
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oat_data_end_ += delta;
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oat_file_end_ += delta;
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image_roots_ += delta;
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patch_delta_ += delta;
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}
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bool ImageHeader::IsValid() const {
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if (memcmp(magic_, kImageMagic, sizeof(kImageMagic)) != 0) {
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return false;
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}
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if (memcmp(version_, kImageVersion, sizeof(kImageVersion)) != 0) {
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return false;
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}
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// Unsigned so wraparound is well defined.
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if (image_begin_ >= image_begin_ + image_size_) {
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return false;
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}
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if (oat_file_begin_ > oat_file_end_) {
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return false;
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}
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if (oat_data_begin_ > oat_data_end_) {
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return false;
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}
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if (oat_file_begin_ >= oat_data_begin_) {
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return false;
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}
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if (image_roots_ <= image_begin_ || oat_file_begin_ <= image_roots_) {
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return false;
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}
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if (!IsAligned<kPageSize>(patch_delta_)) {
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return false;
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}
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return true;
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}
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const char* ImageHeader::GetMagic() const {
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CHECK(IsValid());
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return reinterpret_cast<const char*>(magic_);
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}
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mirror::Object* ImageHeader::GetImageRoot(ImageRoot image_root) const {
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return GetImageRoots()->Get(image_root);
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}
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mirror::ObjectArray<mirror::Object>* ImageHeader::GetImageRoots() const {
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return reinterpret_cast<mirror::ObjectArray<mirror::Object>*>(image_roots_);
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}
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} // namespace art
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