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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
6 | 6 |
7 #include "src/debug/debug.h" | 7 #include "src/debug/debug.h" |
8 | 8 |
9 #include "src/arm64/frames-arm64.h" | 9 #include "src/arm64/frames-arm64.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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140 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { | 140 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { |
141 // We do not know our frame height, but set sp based on fp. | 141 // We do not know our frame height, but set sp based on fp. |
142 __ Add(masm->StackPointer(), fp, FrameDropperFrameConstants::kFunctionOffset); | 142 __ Add(masm->StackPointer(), fp, FrameDropperFrameConstants::kFunctionOffset); |
143 __ AssertStackConsistency(); | 143 __ AssertStackConsistency(); |
144 | 144 |
145 __ Pop(x1); // Function | 145 __ Pop(x1); // Function |
146 __ Mov(masm->StackPointer(), Operand(fp)); | 146 __ Mov(masm->StackPointer(), Operand(fp)); |
147 __ Pop(fp, lr); // Frame, Return address. | 147 __ Pop(fp, lr); // Frame, Return address. |
148 | 148 |
149 ParameterCount dummy(0); | 149 ParameterCount dummy(0); |
150 __ FloodFunctionIfStepping(x1, no_reg, dummy, dummy); | 150 __ CheckDebugHook(x1, no_reg, dummy, dummy); |
151 | 151 |
152 UseScratchRegisterScope temps(masm); | 152 UseScratchRegisterScope temps(masm); |
153 Register scratch = temps.AcquireX(); | 153 Register scratch = temps.AcquireX(); |
154 | 154 |
155 // Load context from the function. | 155 // Load context from the function. |
156 __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); | 156 __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
157 | 157 |
158 // Clear new.target as a safety measure. | 158 // Clear new.target as a safety measure. |
159 __ LoadRoot(x3, Heap::kUndefinedValueRootIndex); | 159 __ LoadRoot(x3, Heap::kUndefinedValueRootIndex); |
160 | 160 |
161 // Get function code. | 161 // Get function code. |
162 __ Ldr(scratch, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); | 162 __ Ldr(scratch, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
163 __ Ldr(scratch, FieldMemOperand(scratch, SharedFunctionInfo::kCodeOffset)); | 163 __ Ldr(scratch, FieldMemOperand(scratch, SharedFunctionInfo::kCodeOffset)); |
164 __ Add(scratch, scratch, Code::kHeaderSize - kHeapObjectTag); | 164 __ Add(scratch, scratch, Code::kHeaderSize - kHeapObjectTag); |
165 | 165 |
166 // Re-run JSFunction, x1 is function, cp is context. | 166 // Re-run JSFunction, x1 is function, cp is context. |
167 __ Br(scratch); | 167 __ Br(scratch); |
168 } | 168 } |
169 | 169 |
170 | 170 |
171 const bool LiveEdit::kFrameDropperSupported = true; | 171 const bool LiveEdit::kFrameDropperSupported = true; |
172 | 172 |
173 } // namespace internal | 173 } // namespace internal |
174 } // namespace v8 | 174 } // namespace v8 |
175 | 175 |
176 #endif // V8_TARGET_ARCH_ARM64 | 176 #endif // V8_TARGET_ARCH_ARM64 |
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