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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef COURGETTE_INSTRUCTION_UTILS_H_ | |
6 #define COURGETTE_INSTRUCTION_UTILS_H_ | |
7 | |
8 #include <stdint.h> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/macros.h" | |
12 #include "courgette/image_utils.h" | |
13 #include "courgette/memory_allocator.h" | |
14 | |
15 namespace courgette { | |
16 | |
17 // An interface to receive emitted instructions parsed from an executable. | |
huangs
2017/03/23 18:51:23
InstructionReceptor identical to the code deleted
| |
18 class InstructionReceptor { | |
19 public: | |
20 InstructionReceptor() = default; | |
21 virtual ~InstructionReceptor() = default; | |
22 | |
23 // Generates an entire base relocation table. | |
24 virtual CheckBool EmitPeRelocs() = 0; | |
25 | |
26 // Generates an ELF style relocation table for X86. | |
27 virtual CheckBool EmitElfRelocation() = 0; | |
28 | |
29 // Generates an ELF style relocation table for ARM. | |
30 virtual CheckBool EmitElfARMRelocation() = 0; | |
31 | |
32 // Following instruction will be assembled at address 'rva'. | |
33 virtual CheckBool EmitOrigin(RVA rva) = 0; | |
34 | |
35 // Generates a single byte of data or machine instruction. | |
36 virtual CheckBool EmitSingleByte(uint8_t byte) = 0; | |
37 | |
38 // Generates multiple bytes of data or machine instructions. | |
39 virtual CheckBool EmitMultipleBytes(const uint8_t* bytes, size_t len) = 0; | |
40 | |
41 // Generates a 4-byte relative reference to address of 'label'. | |
42 virtual CheckBool EmitRel32(Label* label) = 0; | |
43 | |
44 // Generates a 4-byte relative reference to address of 'label' for ARM. | |
45 virtual CheckBool EmitRel32ARM(uint16_t op, | |
46 Label* label, | |
47 const uint8_t* arm_op, | |
48 uint16_t op_size) = 0; | |
49 | |
50 // Generates a 4-byte absolute reference to address of 'label'. | |
51 virtual CheckBool EmitAbs32(Label* label) = 0; | |
52 | |
53 // Generates an 8-byte absolute reference to address of 'label'. | |
54 virtual CheckBool EmitAbs64(Label* label) = 0; | |
55 | |
56 private: | |
57 DISALLOW_COPY_AND_ASSIGN(InstructionReceptor); | |
58 }; | |
59 | |
60 // A rerunable callback that emit instructions to a provided receptor. Returns | |
61 // true on success, and false otherwise. | |
62 using InstructionGenerator = base::Callback<CheckBool(InstructionReceptor*)>; | |
huangs
2017/03/23 18:51:23
Compared to old code in assembly_program.h, remove
| |
63 | |
64 } // namespace courgette | |
65 | |
66 #endif // COURGETTE_INSTRUCTION_UTILS_H_ | |
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