153 lines
4.0 KiB
C++
153 lines
4.0 KiB
C++
/*
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* Copyright (C) 2016 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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#ifndef _LIBUNWINDSTACK_ELF_INTERFACE_H
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#define _LIBUNWINDSTACK_ELF_INTERFACE_H
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#include <elf.h>
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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// Forward declarations.
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class Memory;
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class Regs;
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struct LoadInfo {
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uint64_t offset;
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uint64_t table_offset;
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size_t table_size;
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};
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enum : uint8_t {
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SONAME_UNKNOWN = 0,
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SONAME_VALID,
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SONAME_INVALID,
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};
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class ElfInterface {
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public:
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ElfInterface(Memory* memory) : memory_(memory) {}
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virtual ~ElfInterface() = default;
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virtual bool Init() = 0;
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virtual void InitHeaders() = 0;
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virtual bool GetSoname(std::string* name) = 0;
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virtual bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* offset) = 0;
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virtual bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory);
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Memory* CreateGnuDebugdataMemory();
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Memory* memory() { return memory_; }
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const std::unordered_map<uint64_t, LoadInfo>& pt_loads() { return pt_loads_; }
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uint64_t load_bias() { return load_bias_; }
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void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
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uint64_t dynamic_offset() { return dynamic_offset_; }
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uint64_t dynamic_size() { return dynamic_size_; }
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uint64_t eh_frame_offset() { return eh_frame_offset_; }
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uint64_t eh_frame_size() { return eh_frame_size_; }
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uint64_t gnu_debugdata_offset() { return gnu_debugdata_offset_; }
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uint64_t gnu_debugdata_size() { return gnu_debugdata_size_; }
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protected:
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template <typename EhdrType, typename PhdrType, typename ShdrType>
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bool ReadAllHeaders();
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template <typename EhdrType, typename PhdrType>
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bool ReadProgramHeaders(const EhdrType& ehdr);
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template <typename EhdrType, typename ShdrType>
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bool ReadSectionHeaders(const EhdrType& ehdr);
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template <typename DynType>
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bool GetSonameWithTemplate(std::string* soname);
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virtual bool HandleType(uint64_t, uint32_t) { return false; }
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Memory* memory_;
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std::unordered_map<uint64_t, LoadInfo> pt_loads_;
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uint64_t load_bias_ = 0;
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// Stored elf data.
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uint64_t dynamic_offset_ = 0;
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uint64_t dynamic_size_ = 0;
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uint64_t eh_frame_offset_ = 0;
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uint64_t eh_frame_size_ = 0;
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uint64_t debug_frame_offset_ = 0;
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uint64_t debug_frame_size_ = 0;
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uint64_t gnu_debugdata_offset_ = 0;
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uint64_t gnu_debugdata_size_ = 0;
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uint8_t soname_type_ = SONAME_UNKNOWN;
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std::string soname_;
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};
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class ElfInterface32 : public ElfInterface {
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public:
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ElfInterface32(Memory* memory) : ElfInterface(memory) {}
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virtual ~ElfInterface32() = default;
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bool Init() override {
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return ElfInterface::ReadAllHeaders<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>();
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}
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void InitHeaders() override {
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}
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bool GetSoname(std::string* soname) override {
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return ElfInterface::GetSonameWithTemplate<Elf32_Dyn>(soname);
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}
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bool GetFunctionName(uint64_t, std::string*, uint64_t*) override {
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return false;
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}
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};
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class ElfInterface64 : public ElfInterface {
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public:
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ElfInterface64(Memory* memory) : ElfInterface(memory) {}
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virtual ~ElfInterface64() = default;
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bool Init() override {
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return ElfInterface::ReadAllHeaders<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>();
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}
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void InitHeaders() override {
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}
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bool GetSoname(std::string* soname) override {
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return ElfInterface::GetSonameWithTemplate<Elf64_Dyn>(soname);
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}
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bool GetFunctionName(uint64_t, std::string*, uint64_t*) override {
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return false;
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}
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};
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#endif // _LIBUNWINDSTACK_ELF_INTERFACE_H
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