Christopher Ferris | 723cf9b | 2017-01-19 20:08:48 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _LIBUNWINDSTACK_ARM_EXIDX_H |
| 18 | #define _LIBUNWINDSTACK_ARM_EXIDX_H |
| 19 | |
| 20 | #include <stdint.h> |
| 21 | |
| 22 | #include <deque> |
| 23 | |
| 24 | #include "Memory.h" |
| 25 | #include "Regs.h" |
| 26 | |
| 27 | enum ArmStatus : size_t { |
| 28 | ARM_STATUS_NONE = 0, |
| 29 | ARM_STATUS_NO_UNWIND, |
| 30 | ARM_STATUS_FINISH, |
| 31 | ARM_STATUS_RESERVED, |
| 32 | ARM_STATUS_SPARE, |
| 33 | ARM_STATUS_TRUNCATED, |
| 34 | ARM_STATUS_READ_FAILED, |
| 35 | ARM_STATUS_MALFORMED, |
| 36 | ARM_STATUS_INVALID_ALIGNMENT, |
| 37 | ARM_STATUS_INVALID_PERSONALITY, |
| 38 | }; |
| 39 | |
| 40 | enum ArmOp : uint8_t { |
| 41 | ARM_OP_FINISH = 0xb0, |
| 42 | }; |
| 43 | |
| 44 | class ArmExidx { |
| 45 | public: |
| 46 | ArmExidx(Regs32* regs, Memory* elf_memory, Memory* process_memory) |
| 47 | : regs_(regs), elf_memory_(elf_memory), process_memory_(process_memory) {} |
| 48 | virtual ~ArmExidx() {} |
| 49 | |
| 50 | void LogRawData(); |
| 51 | |
| 52 | bool ExtractEntryData(uint32_t entry_offset); |
| 53 | |
| 54 | bool Eval(); |
| 55 | |
| 56 | bool Decode(); |
| 57 | |
| 58 | std::deque<uint8_t>* data() { return &data_; } |
| 59 | |
| 60 | ArmStatus status() { return status_; } |
| 61 | |
| 62 | Regs32* regs() { return regs_; } |
| 63 | |
| 64 | uint32_t cfa() { return cfa_; } |
| 65 | void set_cfa(uint32_t cfa) { cfa_ = cfa; } |
| 66 | |
| 67 | void set_log(bool log) { log_ = log; } |
| 68 | void set_log_skip_execution(bool skip_execution) { log_skip_execution_ = skip_execution; } |
| 69 | void set_log_indent(uint8_t indent) { log_indent_ = indent; } |
| 70 | |
| 71 | private: |
| 72 | bool GetByte(uint8_t* byte); |
| 73 | |
| 74 | bool DecodePrefix_10_00(uint8_t byte); |
| 75 | bool DecodePrefix_10_01(uint8_t byte); |
| 76 | bool DecodePrefix_10_10(uint8_t byte); |
| 77 | bool DecodePrefix_10_11_0000(); |
| 78 | bool DecodePrefix_10_11_0001(); |
| 79 | bool DecodePrefix_10_11_0010(); |
| 80 | bool DecodePrefix_10_11_0011(); |
| 81 | bool DecodePrefix_10_11_01nn(); |
| 82 | bool DecodePrefix_10_11_1nnn(uint8_t byte); |
| 83 | bool DecodePrefix_10(uint8_t byte); |
| 84 | |
| 85 | bool DecodePrefix_11_000(uint8_t byte); |
| 86 | bool DecodePrefix_11_001(uint8_t byte); |
| 87 | bool DecodePrefix_11_010(uint8_t byte); |
| 88 | bool DecodePrefix_11(uint8_t byte); |
| 89 | |
| 90 | Regs32* regs_ = nullptr; |
| 91 | uint32_t cfa_ = 0; |
| 92 | std::deque<uint8_t> data_; |
| 93 | ArmStatus status_ = ARM_STATUS_NONE; |
| 94 | |
| 95 | Memory* elf_memory_; |
| 96 | Memory* process_memory_; |
| 97 | |
| 98 | bool log_ = false; |
| 99 | uint8_t log_indent_ = 0; |
| 100 | bool log_skip_execution_ = false; |
| 101 | }; |
| 102 | |
| 103 | #endif // _LIBUNWINDSTACK_ARM_EXIDX_H |