1 /* 2 * Copyright (C) 2012 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 ART_DISASSEMBLER_DISASSEMBLER_H_ 18 #define ART_DISASSEMBLER_DISASSEMBLER_H_ 19 20 #include <stdint.h> 21 22 #include <iosfwd> 23 24 #include "arch/instruction_set.h" 25 #include "base/macros.h" 26 27 namespace art { 28 29 class DisassemblerOptions { 30 public: 31 // Should the disassembler print absolute or relative addresses. 32 const bool absolute_addresses_; 33 34 // Base addess for calculating relative code offsets when absolute_addresses_ is false. 35 const uint8_t* const base_address_; 36 37 // If set, the disassembler is allowed to look at load targets in literal 38 // pools. 39 const bool can_read_literals_; 40 41 DisassemblerOptions(bool absolute_addresses, const uint8_t* base_address, 42 bool can_read_literals) 43 : absolute_addresses_(absolute_addresses), base_address_(base_address), 44 can_read_literals_(can_read_literals) {} 45 46 private: 47 DISALLOW_COPY_AND_ASSIGN(DisassemblerOptions); 48 }; 49 50 class Disassembler { 51 public: 52 // Creates a Disassembler for the given InstructionSet with the 53 // non-null DisassemblerOptions which become owned by the 54 // Disassembler. 55 static Disassembler* Create(InstructionSet instruction_set, DisassemblerOptions* options); 56 57 virtual ~Disassembler() { 58 delete disassembler_options_; 59 } 60 61 // Dump a single instruction returning the length of that instruction. 62 virtual size_t Dump(std::ostream& os, const uint8_t* begin) = 0; 63 // Dump instructions within a range. 64 virtual void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) = 0; 65 66 protected: 67 explicit Disassembler(DisassemblerOptions* disassembler_options) 68 : disassembler_options_(disassembler_options) { 69 CHECK(disassembler_options_ != nullptr); 70 } 71 72 std::string FormatInstructionPointer(const uint8_t* begin); 73 74 private: 75 DisassemblerOptions* disassembler_options_; 76 DISALLOW_COPY_AND_ASSIGN(Disassembler); 77 }; 78 79 static inline bool HasBitSet(uint32_t value, uint32_t bit) { 80 return (value & (1 << bit)) != 0; 81 } 82 83 } // namespace art 84 85 #endif // ART_DISASSEMBLER_DISASSEMBLER_H_ 86
