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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 #include "src/x87/codegen-x87.h" | 5 #include "src/x87/codegen-x87.h" |
| 6 | 6 |
| 7 #if V8_TARGET_ARCH_X87 | 7 #if V8_TARGET_ARCH_X87 |
| 8 | 8 |
| 9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
| 10 #include "src/heap/heap.h" | 10 #include "src/heap/heap.h" |
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| 87 public: | 87 public: |
| 88 explicit LabelConverter(byte* buffer) : buffer_(buffer) {} | 88 explicit LabelConverter(byte* buffer) : buffer_(buffer) {} |
| 89 int32_t address(Label* l) const { | 89 int32_t address(Label* l) const { |
| 90 return reinterpret_cast<int32_t>(buffer_) + l->pos(); | 90 return reinterpret_cast<int32_t>(buffer_) + l->pos(); |
| 91 } | 91 } |
| 92 private: | 92 private: |
| 93 byte* buffer_; | 93 byte* buffer_; |
| 94 }; | 94 }; |
| 95 | 95 |
| 96 | 96 |
| 97 MemMoveFunction CreateMemMoveFunction() { | 97 MemMoveFunction CreateMemMoveFunction(Isolate* isolate) { |
| 98 size_t actual_size; | 98 size_t actual_size; |
| 99 // Allocate buffer in executable space. | 99 // Allocate buffer in executable space. |
| 100 byte* buffer = | 100 byte* buffer = |
| 101 static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true)); | 101 static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true)); |
| 102 if (buffer == NULL) return NULL; | 102 if (buffer == nullptr) return nullptr; |
| 103 MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size), | 103 MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size), |
| 104 CodeObjectRequired::kNo); | 104 CodeObjectRequired::kNo); |
| 105 LabelConverter conv(buffer); | 105 LabelConverter conv(buffer); |
| 106 | 106 |
| 107 // Generated code is put into a fixed, unmovable buffer, and not into | 107 // Generated code is put into a fixed, unmovable buffer, and not into |
| 108 // the V8 heap. We can't, and don't, refer to any relocatable addresses | 108 // the V8 heap. We can't, and don't, refer to any relocatable addresses |
| 109 // (e.g. the JavaScript nan-object). | 109 // (e.g. the JavaScript nan-object). |
| 110 | 110 |
| 111 // 32-bit C declaration function calls pass arguments on stack. | 111 // 32-bit C declaration function calls pass arguments on stack. |
| 112 | 112 |
| 113 // Stack layout: | 113 // Stack layout: |
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| 194 __ mov_b(Operand(dst, 0), eax); | 194 __ mov_b(Operand(dst, 0), eax); |
| 195 __ jmp(&backward_loop_1byte); | 195 __ jmp(&backward_loop_1byte); |
| 196 } | 196 } |
| 197 | 197 |
| 198 __ bind(&pop_and_return); | 198 __ bind(&pop_and_return); |
| 199 MemMoveEmitPopAndReturn(&masm); | 199 MemMoveEmitPopAndReturn(&masm); |
| 200 | 200 |
| 201 CodeDesc desc; | 201 CodeDesc desc; |
| 202 masm.GetCode(&desc); | 202 masm.GetCode(&desc); |
| 203 DCHECK(!RelocInfo::RequiresRelocation(desc)); | 203 DCHECK(!RelocInfo::RequiresRelocation(desc)); |
| 204 Assembler::FlushICacheWithoutIsolate(buffer, actual_size); | 204 Assembler::FlushICache(isolate, buffer, actual_size); |
| 205 base::OS::ProtectCode(buffer, actual_size); | 205 base::OS::ProtectCode(buffer, actual_size); |
| 206 // TODO(jkummerow): It would be nice to register this code creation event | 206 // TODO(jkummerow): It would be nice to register this code creation event |
| 207 // with the PROFILE / GDBJIT system. | 207 // with the PROFILE / GDBJIT system. |
| 208 return FUNCTION_CAST<MemMoveFunction>(buffer); | 208 return FUNCTION_CAST<MemMoveFunction>(buffer); |
| 209 } | 209 } |
| 210 | 210 |
| 211 | 211 |
| 212 #undef __ | 212 #undef __ |
| 213 | 213 |
| 214 // ------------------------------------------------------------------------- | 214 // ------------------------------------------------------------------------- |
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| 643 CodePatcher patcher(sequence, young_length); | 643 CodePatcher patcher(sequence, young_length); |
| 644 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); | 644 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); |
| 645 } | 645 } |
| 646 } | 646 } |
| 647 | 647 |
| 648 | 648 |
| 649 } // namespace internal | 649 } // namespace internal |
| 650 } // namespace v8 | 650 } // namespace v8 |
| 651 | 651 |
| 652 #endif // V8_TARGET_ARCH_X87 | 652 #endif // V8_TARGET_ARCH_X87 |
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