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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 // Classes that describe assembly patterns as used by inline caches. | 4 // Classes that describe assembly patterns as used by inline caches. |
5 | 5 |
6 #ifndef VM_INSTRUCTIONS_X64_H_ | 6 #ifndef VM_INSTRUCTIONS_X64_H_ |
7 #define VM_INSTRUCTIONS_X64_H_ | 7 #define VM_INSTRUCTIONS_X64_H_ |
8 | 8 |
9 #ifndef VM_INSTRUCTIONS_H_ | 9 #ifndef VM_INSTRUCTIONS_H_ |
10 #error Do not include instructions_ia32.h directly; use instructions.h instead. | 10 #error Do not include instructions_ia32.h directly; use instructions.h instead. |
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58 } | 58 } |
59 return true; | 59 return true; |
60 } | 60 } |
61 | 61 |
62 const uword start_; | 62 const uword start_; |
63 | 63 |
64 DISALLOW_COPY_AND_ASSIGN(InstructionPattern); | 64 DISALLOW_COPY_AND_ASSIGN(InstructionPattern); |
65 }; | 65 }; |
66 | 66 |
67 | 67 |
68 class JumpPattern : public InstructionPattern<JumpPattern> { | |
69 public: | |
70 JumpPattern(uword pc, const Code& code) | |
71 : InstructionPattern(pc), | |
72 object_pool_(ObjectPool::Handle(code.GetObjectPool())) {} | |
73 | |
74 uword TargetAddress() const; | |
75 void SetTargetAddress(uword new_target) const; | |
76 | |
77 static const int kLengthInBytes = 7; | |
78 static int pattern_length_in_bytes() { return kLengthInBytes; } | |
79 static const int* pattern() { | |
80 // 07: 41 ff a7 imm32 jmpq [reg + off] | |
81 static const int kJumpPattern[kLengthInBytes] = | |
82 {0x41, 0xFF, -1, -1, -1, -1, -1}; | |
83 return kJumpPattern; | |
84 } | |
85 private: | |
86 const ObjectPool& object_pool_; | |
87 | |
88 DISALLOW_COPY_AND_ASSIGN(JumpPattern); | |
89 }; | |
90 | |
91 | |
92 // 5 byte call instruction. | 68 // 5 byte call instruction. |
93 class ShortCallPattern : public InstructionPattern<ShortCallPattern> { | 69 class ShortCallPattern : public InstructionPattern<ShortCallPattern> { |
94 public: | 70 public: |
95 explicit ShortCallPattern(uword pc) : InstructionPattern(pc) {} | 71 explicit ShortCallPattern(uword pc) : InstructionPattern(pc) {} |
96 | 72 |
97 void SetTargetAddress(uword new_target) const; | 73 void SetTargetAddress(uword new_target) const; |
98 | 74 |
99 static int pattern_length_in_bytes() { return kLengthInBytes; } | 75 static int pattern_length_in_bytes() { return kLengthInBytes; } |
100 static const int* pattern() { | 76 static const int* pattern() { |
101 static const int kCallPattern[kLengthInBytes] = {0xE8, -1, -1, -1, -1}; | 77 static const int kCallPattern[kLengthInBytes] = {0xE8, -1, -1, -1, -1}; |
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157 | 133 |
158 static int pattern_length_in_bytes() { return kLengthInBytes; } | 134 static int pattern_length_in_bytes() { return kLengthInBytes; } |
159 | 135 |
160 private: | 136 private: |
161 static const int kLengthInBytes = 3; | 137 static const int kLengthInBytes = 3; |
162 }; | 138 }; |
163 | 139 |
164 } // namespace dart | 140 } // namespace dart |
165 | 141 |
166 #endif // VM_INSTRUCTIONS_X64_H_ | 142 #endif // VM_INSTRUCTIONS_X64_H_ |
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