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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 RUNTIME_VM_INSTRUCTIONS_IA32_H_ | 6 #ifndef RUNTIME_VM_INSTRUCTIONS_IA32_H_ |
7 #define RUNTIME_VM_INSTRUCTIONS_IA32_H_ | 7 #define RUNTIME_VM_INSTRUCTIONS_IA32_H_ |
8 | 8 |
9 #ifndef RUNTIME_VM_INSTRUCTIONS_H_ | 9 #ifndef RUNTIME_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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53 } | 53 } |
54 } | 54 } |
55 return true; | 55 return true; |
56 } | 56 } |
57 | 57 |
58 const uword start_; | 58 const uword start_; |
59 | 59 |
60 DISALLOW_COPY_AND_ASSIGN(InstructionPattern); | 60 DISALLOW_COPY_AND_ASSIGN(InstructionPattern); |
61 }; | 61 }; |
62 | 62 |
63 | |
64 class CallPattern : public InstructionPattern<CallPattern> { | 63 class CallPattern : public InstructionPattern<CallPattern> { |
65 public: | 64 public: |
66 explicit CallPattern(uword pc) : InstructionPattern(pc) {} | 65 explicit CallPattern(uword pc) : InstructionPattern(pc) {} |
67 uword TargetAddress() const { | 66 uword TargetAddress() const { |
68 ASSERT(this->IsValid()); | 67 ASSERT(this->IsValid()); |
69 return this->start() + CallPattern::pattern_length_in_bytes() + | 68 return this->start() + CallPattern::pattern_length_in_bytes() + |
70 *reinterpret_cast<uword*>(this->start() + 1); | 69 *reinterpret_cast<uword*>(this->start() + 1); |
71 } | 70 } |
72 | 71 |
73 void SetTargetAddress(uword new_target) const { | 72 void SetTargetAddress(uword new_target) const { |
74 ASSERT(this->IsValid()); | 73 ASSERT(this->IsValid()); |
75 *reinterpret_cast<uword*>(this->start() + 1) = | 74 *reinterpret_cast<uword*>(this->start() + 1) = |
76 new_target - this->start() - CallPattern::pattern_length_in_bytes(); | 75 new_target - this->start() - CallPattern::pattern_length_in_bytes(); |
77 CPU::FlushICache(this->start() + 1, kWordSize); | 76 CPU::FlushICache(this->start() + 1, kWordSize); |
78 } | 77 } |
79 | 78 |
80 static int pattern_length_in_bytes() { return kLengthInBytes; } | 79 static int pattern_length_in_bytes() { return kLengthInBytes; } |
81 static const int* pattern() { | 80 static const int* pattern() { |
82 static const int kCallPattern[kLengthInBytes] = {0xE8, -1, -1, -1, -1}; | 81 static const int kCallPattern[kLengthInBytes] = {0xE8, -1, -1, -1, -1}; |
83 return kCallPattern; | 82 return kCallPattern; |
84 } | 83 } |
85 | 84 |
86 | |
87 private: | 85 private: |
88 static const int kLengthInBytes = 5; | 86 static const int kLengthInBytes = 5; |
89 DISALLOW_COPY_AND_ASSIGN(CallPattern); | 87 DISALLOW_COPY_AND_ASSIGN(CallPattern); |
90 }; | 88 }; |
91 | 89 |
92 | |
93 class ReturnPattern : public InstructionPattern<ReturnPattern> { | 90 class ReturnPattern : public InstructionPattern<ReturnPattern> { |
94 public: | 91 public: |
95 explicit ReturnPattern(uword pc) : InstructionPattern(pc) {} | 92 explicit ReturnPattern(uword pc) : InstructionPattern(pc) {} |
96 | 93 |
97 static const int* pattern() { | 94 static const int* pattern() { |
98 static const int kReturnPattern[kLengthInBytes] = {0xC3}; | 95 static const int kReturnPattern[kLengthInBytes] = {0xC3}; |
99 return kReturnPattern; | 96 return kReturnPattern; |
100 } | 97 } |
101 static int pattern_length_in_bytes() { return kLengthInBytes; } | 98 static int pattern_length_in_bytes() { return kLengthInBytes; } |
102 | 99 |
103 private: | 100 private: |
104 static const int kLengthInBytes = 1; | 101 static const int kLengthInBytes = 1; |
105 }; | 102 }; |
106 | 103 |
107 | |
108 // push ebp | 104 // push ebp |
109 // mov ebp, esp | 105 // mov ebp, esp |
110 class ProloguePattern : public InstructionPattern<ProloguePattern> { | 106 class ProloguePattern : public InstructionPattern<ProloguePattern> { |
111 public: | 107 public: |
112 explicit ProloguePattern(uword pc) : InstructionPattern(pc) {} | 108 explicit ProloguePattern(uword pc) : InstructionPattern(pc) {} |
113 | 109 |
114 static const int* pattern() { | 110 static const int* pattern() { |
115 static const int kProloguePattern[kLengthInBytes] = {0x55, 0x89, 0xe5}; | 111 static const int kProloguePattern[kLengthInBytes] = {0x55, 0x89, 0xe5}; |
116 return kProloguePattern; | 112 return kProloguePattern; |
117 } | 113 } |
118 | 114 |
119 static int pattern_length_in_bytes() { return kLengthInBytes; } | 115 static int pattern_length_in_bytes() { return kLengthInBytes; } |
120 | 116 |
121 private: | 117 private: |
122 static const int kLengthInBytes = 3; | 118 static const int kLengthInBytes = 3; |
123 }; | 119 }; |
124 | 120 |
125 | |
126 // mov ebp, esp | 121 // mov ebp, esp |
127 class SetFramePointerPattern | 122 class SetFramePointerPattern |
128 : public InstructionPattern<SetFramePointerPattern> { | 123 : public InstructionPattern<SetFramePointerPattern> { |
129 public: | 124 public: |
130 explicit SetFramePointerPattern(uword pc) : InstructionPattern(pc) {} | 125 explicit SetFramePointerPattern(uword pc) : InstructionPattern(pc) {} |
131 | 126 |
132 static const int* pattern() { | 127 static const int* pattern() { |
133 static const int kFramePointerPattern[kLengthInBytes] = {0x89, 0xe5}; | 128 static const int kFramePointerPattern[kLengthInBytes] = {0x89, 0xe5}; |
134 return kFramePointerPattern; | 129 return kFramePointerPattern; |
135 } | 130 } |
136 | 131 |
137 static int pattern_length_in_bytes() { return kLengthInBytes; } | 132 static int pattern_length_in_bytes() { return kLengthInBytes; } |
138 | 133 |
139 private: | 134 private: |
140 static const int kLengthInBytes = 2; | 135 static const int kLengthInBytes = 2; |
141 }; | 136 }; |
142 | 137 |
143 } // namespace dart | 138 } // namespace dart |
144 | 139 |
145 #endif // RUNTIME_VM_INSTRUCTIONS_IA32_H_ | 140 #endif // RUNTIME_VM_INSTRUCTIONS_IA32_H_ |
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