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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #if V8_TARGET_ARCH_IA32 | 5 #if V8_TARGET_ARCH_IA32 |
6 | 6 |
7 #include "src/codegen.h" | 7 #include "src/codegen.h" |
8 #include "src/debug/debug.h" | 8 #include "src/debug/debug.h" |
9 #include "src/ia32/frames-ia32.h" | 9 #include "src/ia32/frames-ia32.h" |
10 | 10 |
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99 | 99 |
100 // Now that the break point has been handled, resume normal execution by | 100 // Now that the break point has been handled, resume normal execution by |
101 // jumping to the target address intended by the caller and that was | 101 // jumping to the target address intended by the caller and that was |
102 // overwritten by the address of DebugBreakXXX. | 102 // overwritten by the address of DebugBreakXXX. |
103 ExternalReference after_break_target = | 103 ExternalReference after_break_target = |
104 ExternalReference::debug_after_break_target_address(masm->isolate()); | 104 ExternalReference::debug_after_break_target_address(masm->isolate()); |
105 __ jmp(Operand::StaticVariable(after_break_target)); | 105 __ jmp(Operand::StaticVariable(after_break_target)); |
106 } | 106 } |
107 | 107 |
108 | 108 |
| 109 void DebugCodegen::GeneratePlainReturnLiveEdit(MacroAssembler* masm) { |
| 110 masm->ret(0); |
| 111 } |
| 112 |
| 113 |
109 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { | 114 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { |
| 115 ExternalReference restarter_frame_function_slot = |
| 116 ExternalReference::debug_restarter_frame_function_pointer_address( |
| 117 masm->isolate()); |
| 118 __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0)); |
| 119 |
110 // We do not know our frame height, but set esp based on ebp. | 120 // We do not know our frame height, but set esp based on ebp. |
111 __ lea(esp, Operand(ebp, -1 * kPointerSize)); | 121 __ lea(esp, Operand(ebp, -1 * kPointerSize)); |
112 | 122 |
113 __ pop(edi); // Function. | 123 __ pop(edi); // Function. |
114 | |
115 ParameterCount dummy(0); | |
116 __ FloodFunctionIfStepping(edi, no_reg, dummy, dummy); | |
117 | |
118 __ pop(ebp); | 124 __ pop(ebp); |
119 | 125 |
120 // Load context from the function. | 126 // Load context from the function. |
121 __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); | 127 __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
122 | 128 |
123 // Get function code. | 129 // Get function code. |
124 __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); | 130 __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
125 __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); | 131 __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
126 __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); | 132 __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
127 | 133 |
128 // Re-run JSFunction, edi is function, esi is context. | 134 // Re-run JSFunction, edi is function, esi is context. |
129 __ jmp(edx); | 135 __ jmp(edx); |
130 } | 136 } |
131 | 137 |
132 | 138 |
133 const bool LiveEdit::kFrameDropperSupported = true; | 139 const bool LiveEdit::kFrameDropperSupported = true; |
134 | 140 |
135 #undef __ | 141 #undef __ |
136 | 142 |
137 } // namespace internal | 143 } // namespace internal |
138 } // namespace v8 | 144 } // namespace v8 |
139 | 145 |
140 #endif // V8_TARGET_ARCH_IA32 | 146 #endif // V8_TARGET_ARCH_IA32 |
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