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 address for calculating relative code offsets when absolute_addresses_ is false. 35 const uint8_t* const base_address_; 36 37 // End address (exclusive); 38 const uint8_t* const end_address_; 39 40 // If set, the disassembler is allowed to look at load targets in literal 41 // pools. 42 const bool can_read_literals_; 43 44 DisassemblerOptions(bool absolute_addresses, 45 const uint8_t* base_address, 46 const uint8_t* end_address, 47 bool can_read_literals) 48 : absolute_addresses_(absolute_addresses), 49 base_address_(base_address), 50 end_address_(end_address), 51 can_read_literals_(can_read_literals) {} 52 53 private: 54 DISALLOW_COPY_AND_ASSIGN(DisassemblerOptions); 55 }; 56 57 class Disassembler { 58 public: 59 // Creates a Disassembler for the given InstructionSet with the 60 // non-null DisassemblerOptions which become owned by the 61 // Disassembler. 62 static Disassembler* Create(InstructionSet instruction_set, DisassemblerOptions* options); 63 64 virtual ~Disassembler() { 65 delete disassembler_options_; 66 } 67 68 // Dump a single instruction returning the length of that instruction. 69 virtual size_t Dump(std::ostream& os, const uint8_t* begin) = 0; 70 // Dump instructions within a range. 71 virtual void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) = 0; 72 73 const DisassemblerOptions* GetDisassemblerOptions() const { 74 return disassembler_options_; 75 } 76 77 protected: 78 explicit Disassembler(DisassemblerOptions* disassembler_options) 79 : disassembler_options_(disassembler_options) { 80 CHECK(disassembler_options_ != nullptr); 81 } 82 83 std::string FormatInstructionPointer(const uint8_t* begin); 84 85 private: 86 DisassemblerOptions* disassembler_options_; 87 DISALLOW_COPY_AND_ASSIGN(Disassembler); 88 }; 89 90 static inline bool HasBitSet(uint32_t value, uint32_t bit) { 91 return (value & (1 << bit)) != 0; 92 } 93 94 extern "C" 95 Disassembler* create_disassembler(InstructionSet instruction_set, DisassemblerOptions* options); 96 97 } // namespace art 98 99 #endif // ART_DISASSEMBLER_DISASSEMBLER_H_ 100
