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 "base/macros.h"
25 #include "instruction_set.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
DisassemblerOptions(bool absolute_addresses,const uint8_t * base_address)37 DisassemblerOptions(bool absolute_addresses, const uint8_t* base_address)
38 : absolute_addresses_(absolute_addresses), base_address_(base_address) {}
39
40 private:
41 DISALLOW_COPY_AND_ASSIGN(DisassemblerOptions);
42 };
43
44 class Disassembler {
45 public:
46 // Creates a Disassembler for the given InstructionSet with the
47 // non-null DisassemblerOptions which become owned by the
48 // Disassembler.
49 static Disassembler* Create(InstructionSet instruction_set, DisassemblerOptions* options);
50
~Disassembler()51 virtual ~Disassembler() {
52 delete disassembler_options_;
53 }
54
55 // Dump a single instruction returning the length of that instruction.
56 virtual size_t Dump(std::ostream& os, const uint8_t* begin) = 0;
57 // Dump instructions within a range.
58 virtual void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) = 0;
59
60 protected:
Disassembler(DisassemblerOptions * disassembler_options)61 explicit Disassembler(DisassemblerOptions* disassembler_options)
62 : disassembler_options_(disassembler_options) {
63 CHECK(disassembler_options_ != nullptr);
64 }
65
66 std::string FormatInstructionPointer(const uint8_t* begin);
67
68 private:
69 DisassemblerOptions* disassembler_options_;
70 DISALLOW_COPY_AND_ASSIGN(Disassembler);
71 };
72
HasBitSet(uint32_t value,uint32_t bit)73 static inline bool HasBitSet(uint32_t value, uint32_t bit) {
74 return (value & (1 << bit)) != 0;
75 }
76
77 } // namespace art
78
79 #endif // ART_DISASSEMBLER_DISASSEMBLER_H_
80