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/*
* Copyright (C) 2016 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 _LIBUNWINDSTACK_ARM_EXIDX_H
#define _LIBUNWINDSTACK_ARM_EXIDX_H
#include <stdint.h>
#include <deque>
namespace unwindstack {
// Forward declarations.
class Memory;
class RegsArm;
enum ArmStatus : size_t {
ARM_STATUS_NONE = 0,
ARM_STATUS_NO_UNWIND,
ARM_STATUS_FINISH,
ARM_STATUS_RESERVED,
ARM_STATUS_SPARE,
ARM_STATUS_TRUNCATED,
ARM_STATUS_READ_FAILED,
ARM_STATUS_MALFORMED,
ARM_STATUS_INVALID_ALIGNMENT,
ARM_STATUS_INVALID_PERSONALITY,
};
enum ArmOp : uint8_t {
ARM_OP_FINISH = 0xb0,
};
class ArmExidx {
public:
ArmExidx(RegsArm* regs, Memory* elf_memory, Memory* process_memory)
: regs_(regs), elf_memory_(elf_memory), process_memory_(process_memory) {}
virtual ~ArmExidx() {}
void LogRawData();
bool ExtractEntryData(uint32_t entry_offset);
bool Eval();
bool Decode();
std::deque<uint8_t>* data() { return &data_; }
ArmStatus status() { return status_; }
RegsArm* regs() { return regs_; }
uint32_t cfa() { return cfa_; }
void set_cfa(uint32_t cfa) { cfa_ = cfa; }
bool pc_set() { return pc_set_; }
void set_pc_set(bool pc_set) { pc_set_ = pc_set; }
void set_log(bool log) { log_ = log; }
void set_log_skip_execution(bool skip_execution) { log_skip_execution_ = skip_execution; }
void set_log_indent(uint8_t indent) { log_indent_ = indent; }
private:
bool GetByte(uint8_t* byte);
bool DecodePrefix_10_00(uint8_t byte);
bool DecodePrefix_10_01(uint8_t byte);
bool DecodePrefix_10_10(uint8_t byte);
bool DecodePrefix_10_11_0000();
bool DecodePrefix_10_11_0001();
bool DecodePrefix_10_11_0010();
bool DecodePrefix_10_11_0011();
bool DecodePrefix_10_11_01nn();
bool DecodePrefix_10_11_1nnn(uint8_t byte);
bool DecodePrefix_10(uint8_t byte);
bool DecodePrefix_11_000(uint8_t byte);
bool DecodePrefix_11_001(uint8_t byte);
bool DecodePrefix_11_010(uint8_t byte);
bool DecodePrefix_11(uint8_t byte);
RegsArm* regs_ = nullptr;
uint32_t cfa_ = 0;
std::deque<uint8_t> data_;
ArmStatus status_ = ARM_STATUS_NONE;
Memory* elf_memory_;
Memory* process_memory_;
bool log_ = false;
uint8_t log_indent_ = 0;
bool log_skip_execution_ = false;
bool pc_set_ = false;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_ARM_EXIDX_H
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