3958f8060a
This cl includes the code to read arm unwind information from a shared library. Bug: 23762183 Test: Passes all unit tests. I can dump the arm unwind information Test: for an arm shared library. Change-Id: I43501ea2eab843b81de8bd5128401dd1971af8d3
127 lines
3.2 KiB
C++
127 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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#ifndef _LIBUNWINDSTACK_REGS_H
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#define _LIBUNWINDSTACK_REGS_H
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#include <stdint.h>
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#include <vector>
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// Forward declarations.
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class Elf;
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struct MapInfo;
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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, uint16_t sp_reg, const Location& return_loc)
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: total_regs_(total_regs), sp_reg_(sp_reg), return_loc_(return_loc) {}
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virtual ~Regs() = default;
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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 bool GetReturnAddressFromDefault(Memory* memory, uint64_t* value) = 0;
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virtual uint64_t GetRelPc(Elf* elf, const MapInfo* map_info) = 0;
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virtual uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) = 0;
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uint16_t sp_reg() { return sp_reg_; }
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uint16_t total_regs() { return total_regs_; }
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static Regs* RemoteGet(pid_t pid, uint32_t* machine_type);
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protected:
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uint16_t total_regs_;
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uint16_t sp_reg_;
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Location return_loc_;
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};
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template <typename AddressType>
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class RegsTmpl : public Regs {
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public:
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RegsTmpl(uint16_t total_regs, uint16_t sp_reg, Location return_loc)
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: Regs(total_regs, sp_reg, return_loc), regs_(total_regs) {}
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virtual ~RegsTmpl() = default;
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uint64_t GetRelPc(Elf* elf, const MapInfo* map_info) override;
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bool GetReturnAddressFromDefault(Memory* memory, uint64_t* value) override;
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uint64_t pc() override { return pc_; }
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uint64_t sp() override { return sp_; }
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void set_pc(AddressType pc) { pc_ = pc; }
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void set_sp(AddressType sp) { sp_ = sp; }
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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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protected:
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AddressType pc_;
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AddressType sp_;
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std::vector<AddressType> regs_;
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};
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class RegsArm : public RegsTmpl<uint32_t> {
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public:
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RegsArm();
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virtual ~RegsArm() = default;
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uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) override;
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};
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class RegsArm64 : public RegsTmpl<uint64_t> {
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public:
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RegsArm64();
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virtual ~RegsArm64() = default;
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uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) override;
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};
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class RegsX86 : public RegsTmpl<uint32_t> {
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public:
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RegsX86();
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virtual ~RegsX86() = default;
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uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) override;
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};
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class RegsX86_64 : public RegsTmpl<uint64_t> {
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public:
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RegsX86_64();
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virtual ~RegsX86_64() = default;
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uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) override;
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};
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#endif // _LIBUNWINDSTACK_REGS_H
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