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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 // 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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| 832 static byte* GetNoCodeAgeSequence(uint32_t* length) { | 832 static byte* GetNoCodeAgeSequence(uint32_t* length) { |
| 833 // The sequence of instructions that is patched out for aging code is the | 833 // The sequence of instructions that is patched out for aging code is the |
| 834 // following boilerplate stack-building prologue that is found in FUNCTIONS | 834 // following boilerplate stack-building prologue that is found in FUNCTIONS |
| 835 static bool initialized = false; | 835 static bool initialized = false; |
| 836 static uint32_t sequence[kNoCodeAgeSequenceLength]; | 836 static uint32_t sequence[kNoCodeAgeSequenceLength]; |
| 837 byte* byte_sequence = reinterpret_cast<byte*>(sequence); | 837 byte* byte_sequence = reinterpret_cast<byte*>(sequence); |
| 838 *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize; | 838 *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize; |
| 839 if (!initialized) { | 839 if (!initialized) { |
| 840 CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength); | 840 CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength); |
| 841 PredictableCodeSizeScope scope(patcher.masm(), *length); | 841 PredictableCodeSizeScope scope(patcher.masm(), *length); |
| 842 patcher.masm()->stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); | 842 patcher.masm()->PushFixedFrame(r1); |
| 843 patcher.masm()->nop(ip.code()); | 843 patcher.masm()->nop(ip.code()); |
| 844 patcher.masm()->add(fp, sp, | 844 patcher.masm()->add(fp, sp, |
| 845 Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); | 845 Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| 846 initialized = true; | 846 initialized = true; |
| 847 } | 847 } |
| 848 return byte_sequence; | 848 return byte_sequence; |
| 849 } | 849 } |
| 850 | 850 |
| 851 | 851 |
| 852 bool Code::IsYoungSequence(byte* sequence) { | 852 bool Code::IsYoungSequence(byte* sequence) { |
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| 888 patcher.masm()->add(r0, pc, Operand(-8)); | 888 patcher.masm()->add(r0, pc, Operand(-8)); |
| 889 patcher.masm()->ldr(pc, MemOperand(pc, -4)); | 889 patcher.masm()->ldr(pc, MemOperand(pc, -4)); |
| 890 patcher.masm()->emit_code_stub_address(stub); | 890 patcher.masm()->emit_code_stub_address(stub); |
| 891 } | 891 } |
| 892 } | 892 } |
| 893 | 893 |
| 894 | 894 |
| 895 } } // namespace v8::internal | 895 } } // namespace v8::internal |
| 896 | 896 |
| 897 #endif // V8_TARGET_ARCH_ARM | 897 #endif // V8_TARGET_ARCH_ARM |
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