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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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120 __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); | 120 __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); |
121 // Adjust FP to point to saved FP. | 121 // Adjust FP to point to saved FP. |
122 __ add(fp, sp, Operand(2 * kPointerSize)); | 122 __ add(fp, sp, Operand(2 * kPointerSize)); |
123 cgen()->allocator()->Unuse(r1); | 123 cgen()->allocator()->Unuse(r1); |
124 cgen()->allocator()->Unuse(lr); | 124 cgen()->allocator()->Unuse(lr); |
125 } | 125 } |
126 | 126 |
127 | 127 |
128 void VirtualFrame::Exit() { | 128 void VirtualFrame::Exit() { |
129 Comment cmnt(masm(), "[ Exit JS frame"); | 129 Comment cmnt(masm(), "[ Exit JS frame"); |
| 130 // Record the location of the JS exit code for patching when setting |
| 131 // break point. |
| 132 __ RecordJSReturn(); |
| 133 |
130 // Drop the execution stack down to the frame pointer and restore the caller | 134 // Drop the execution stack down to the frame pointer and restore the caller |
131 // frame pointer and return address. | 135 // frame pointer and return address. |
132 __ mov(sp, fp); | 136 __ mov(sp, fp); |
133 __ ldm(ia_w, sp, fp.bit() | lr.bit()); | 137 __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
134 } | 138 } |
135 | 139 |
136 | 140 |
137 void VirtualFrame::AllocateStackSlots() { | 141 void VirtualFrame::AllocateStackSlots() { |
138 int count = local_count(); | 142 int count = local_count(); |
139 if (count > 0) { | 143 if (count > 0) { |
140 Comment cmnt(masm(), "[ Allocate space for locals"); | 144 Comment cmnt(masm(), "[ Allocate space for locals"); |
141 Adjust(count); | 145 Adjust(count); |
142 // Initialize stack slots with 'undefined' value. | 146 // Initialize stack slots with 'undefined' value. |
143 __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); | 147 __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
144 } | 148 } |
145 if (FLAG_check_stack) { | 149 if (FLAG_check_stack) { |
146 __ LoadRoot(r2, Heap::kStackLimitRootIndex); | 150 __ LoadRoot(r2, Heap::kStackLimitRootIndex); |
147 } | 151 } |
148 for (int i = 0; i < count; i++) { | 152 for (int i = 0; i < count; i++) { |
149 __ push(ip); | 153 __ push(ip); |
150 } | 154 } |
151 if (FLAG_check_stack) { | 155 if (FLAG_check_stack) { |
152 // Put the lr setup instruction in the delay slot. The 'sizeof(Instr)' is | 156 // Put the lr setup instruction in the delay slot. The kInstrSize is added |
153 // added to the implicit 8 byte offset that always applies to operations | 157 // to the implicit 8 byte offset that always applies to operations with pc |
154 // with pc and gives a return address 12 bytes down. | 158 // and gives a return address 12 bytes down. |
155 masm()->add(lr, pc, Operand(sizeof(Instr))); | 159 masm()->add(lr, pc, Operand(Assembler::kInstrSize)); |
156 masm()->cmp(sp, Operand(r2)); | 160 masm()->cmp(sp, Operand(r2)); |
157 StackCheckStub stub; | 161 StackCheckStub stub; |
158 // Call the stub if lower. | 162 // Call the stub if lower. |
159 masm()->mov(pc, | 163 masm()->mov(pc, |
160 Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()), | 164 Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()), |
161 RelocInfo::CODE_TARGET), | 165 RelocInfo::CODE_TARGET), |
162 LeaveCC, | 166 LeaveCC, |
163 lo); | 167 lo); |
164 } | 168 } |
165 } | 169 } |
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384 ASSERT(stack_pointer_ == element_count() - 1); | 388 ASSERT(stack_pointer_ == element_count() - 1); |
385 elements_.Add(FrameElement::MemoryElement()); | 389 elements_.Add(FrameElement::MemoryElement()); |
386 stack_pointer_++; | 390 stack_pointer_++; |
387 __ push(reg); | 391 __ push(reg); |
388 } | 392 } |
389 | 393 |
390 | 394 |
391 #undef __ | 395 #undef __ |
392 | 396 |
393 } } // namespace v8::internal | 397 } } // namespace v8::internal |
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