120 lines
3.2 KiB
C++
120 lines
3.2 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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#pragma once
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#include <stdint.h>
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#include <unistd.h>
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#include <functional>
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#include <string>
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#include <vector>
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#include <unwindstack/Arch.h>
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#include <unwindstack/Error.h>
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namespace unwindstack {
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// Forward declarations.
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class Elf;
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class Memory;
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class Regs {
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public:
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enum LocationEnum : uint8_t {
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LOCATION_UNKNOWN = 0,
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LOCATION_REGISTER,
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LOCATION_SP_OFFSET,
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};
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struct Location {
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Location(LocationEnum type, int16_t value) : type(type), value(value) {}
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LocationEnum type;
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int16_t value;
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};
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Regs(uint16_t total_regs, const Location& return_loc)
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: total_regs_(total_regs), return_loc_(return_loc) {}
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virtual ~Regs() = default;
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virtual ArchEnum Arch() = 0;
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bool Is32Bit() { return ArchIs32Bit(Arch()); }
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virtual void* RawData() = 0;
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virtual uint64_t pc() = 0;
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virtual uint64_t sp() = 0;
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virtual void set_pc(uint64_t pc) = 0;
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virtual void set_sp(uint64_t sp) = 0;
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uint64_t dex_pc() { return dex_pc_; }
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void set_dex_pc(uint64_t dex_pc) { dex_pc_ = dex_pc; }
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virtual void fallback_pc() {}
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virtual void ResetPseudoRegisters() {}
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virtual bool SetPseudoRegister(uint16_t, uint64_t) { return false; }
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virtual bool GetPseudoRegister(uint16_t, uint64_t*) { return false; }
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virtual bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) = 0;
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virtual bool SetPcFromReturnAddress(Memory* process_memory) = 0;
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virtual void IterateRegisters(std::function<void(const char*, uint64_t)>) = 0;
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uint16_t total_regs() { return total_regs_; }
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virtual Regs* Clone() = 0;
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static ArchEnum CurrentArch();
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static ArchEnum RemoteGetArch(pid_t pid, ErrorCode* error_code = nullptr);
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static Regs* RemoteGet(pid_t pid, ErrorCode* error_code = nullptr);
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static Regs* CreateFromUcontext(ArchEnum arch, void* ucontext);
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static Regs* CreateFromLocal();
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protected:
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uint16_t total_regs_;
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Location return_loc_;
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uint64_t dex_pc_ = 0;
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};
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template <typename AddressType>
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class RegsImpl : public Regs {
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public:
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RegsImpl(uint16_t total_regs, Location return_loc)
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: Regs(total_regs, return_loc), regs_(total_regs) {}
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virtual ~RegsImpl() = default;
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inline AddressType& operator[](size_t reg) { return regs_[reg]; }
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void* RawData() override { return regs_.data(); }
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virtual void IterateRegisters(std::function<void(const char*, uint64_t)> fn) override {
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for (size_t i = 0; i < regs_.size(); ++i) {
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fn(std::to_string(i).c_str(), regs_[i]);
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}
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}
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protected:
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std::vector<AddressType> regs_;
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};
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uint64_t GetPcAdjustment(uint64_t rel_pc, Elf* elf, ArchEnum arch);
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} // namespace unwindstack
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