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Diffstat (limited to 'compiler/linker/relative_patcher.h')
| -rw-r--r-- | compiler/linker/relative_patcher.h | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/compiler/linker/relative_patcher.h b/compiler/linker/relative_patcher.h deleted file mode 100644 index b58e3dffbd6..00000000000 --- a/compiler/linker/relative_patcher.h +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (C) 2015 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. - */ - -#ifndef ART_COMPILER_LINKER_RELATIVE_PATCHER_H_ -#define ART_COMPILER_LINKER_RELATIVE_PATCHER_H_ - -#include <vector> - -#include "arch/instruction_set.h" -#include "arch/instruction_set_features.h" -#include "base/array_ref.h" -#include "base/macros.h" -#include "dex/method_reference.h" - -namespace art { - -class CompiledMethod; - -namespace debug { -struct MethodDebugInfo; -} // namespace debug - -namespace linker { - -class LinkerPatch; -class OutputStream; - -/** - * @class RelativePatcherTargetProvider - * @brief Interface for providing method offsets for relative call targets. - */ -class RelativePatcherTargetProvider { - public: - /** - * Find the offset of the target method of a relative call if known. - * - * The process of assigning target method offsets includes calls to the relative patcher's - * ReserveSpace() which in turn can use FindMethodOffset() to determine if a method already - * has an offset assigned and, if so, what's that offset. If the offset has not yet been - * assigned or if it's too far for the particular architecture's relative call, - * ReserveSpace() may need to allocate space for a special dispatch thunk. - * - * @param ref the target method of the relative call. - * @return true in the first element of the pair if the method was found, false otherwise; - * if found, the second element specifies the offset. - */ - virtual std::pair<bool, uint32_t> FindMethodOffset(MethodReference ref) = 0; - - protected: - virtual ~RelativePatcherTargetProvider() { } -}; - -/** - * @class RelativePatcher - * @brief Interface for architecture-specific link-time patching of PC-relative references. - */ -class RelativePatcher { - public: - static std::unique_ptr<RelativePatcher> Create( - InstructionSet instruction_set, const InstructionSetFeatures* features, - RelativePatcherTargetProvider* provider); - - virtual ~RelativePatcher() { } - - uint32_t CodeAlignmentSize() const { - return size_code_alignment_; - } - - uint32_t RelativeCallThunksSize() const { - return size_relative_call_thunks_; - } - - uint32_t MiscThunksSize() const { - return size_misc_thunks_; - } - - // Reserve space for thunks if needed before a method, return adjusted offset. - virtual uint32_t ReserveSpace(uint32_t offset, - const CompiledMethod* compiled_method, - MethodReference method_ref) = 0; - - // Reserve space for thunks if needed after the last method, return adjusted offset. - // The caller may use this method to preemptively force thunk space reservation and - // then resume reservation for more methods. This is useful when there is a gap in - // the .text segment, for example when going to the next oat file for multi-image. - virtual uint32_t ReserveSpaceEnd(uint32_t offset) = 0; - - // Write relative call thunks if needed, return adjusted offset. Returns 0 on write failure. - virtual uint32_t WriteThunks(OutputStream* out, uint32_t offset) = 0; - - // Patch method code. The input displacement is relative to the patched location, - // the patcher may need to adjust it if the correct base is different. - virtual void PatchCall(std::vector<uint8_t>* code, - uint32_t literal_offset, - uint32_t patch_offset, - uint32_t target_offset) = 0; - - // Patch a reference to a dex cache location. - virtual void PatchPcRelativeReference(std::vector<uint8_t>* code, - const LinkerPatch& patch, - uint32_t patch_offset, - uint32_t target_offset) = 0; - - // Patch a branch to a Baker read barrier thunk. - virtual void PatchBakerReadBarrierBranch(std::vector<uint8_t>* code, - const LinkerPatch& patch, - uint32_t patch_offset) = 0; - - virtual std::vector<debug::MethodDebugInfo> GenerateThunkDebugInfo( - uint32_t executable_offset) = 0; - - protected: - RelativePatcher() - : size_code_alignment_(0u), - size_relative_call_thunks_(0u), - size_misc_thunks_(0u) { - } - - bool WriteCodeAlignment(OutputStream* out, uint32_t aligned_code_delta); - bool WriteThunk(OutputStream* out, const ArrayRef<const uint8_t>& thunk); - bool WriteMiscThunk(OutputStream* out, const ArrayRef<const uint8_t>& thunk); - - private: - uint32_t size_code_alignment_; - uint32_t size_relative_call_thunks_; - uint32_t size_misc_thunks_; - - DISALLOW_COPY_AND_ASSIGN(RelativePatcher); -}; - -} // namespace linker -} // namespace art - -#endif // ART_COMPILER_LINKER_RELATIVE_PATCHER_H_ |
