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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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628 *parity = NO_MARKING_PARITY; | 628 *parity = NO_MARKING_PARITY; |
629 } else { | 629 } else { |
630 Address target_address = Memory::Address_at( | 630 Address target_address = Memory::Address_at( |
631 sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1)); | 631 sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1)); |
632 Code* stub = GetCodeFromTargetAddress(target_address); | 632 Code* stub = GetCodeFromTargetAddress(target_address); |
633 GetCodeAgeAndParity(stub, age, parity); | 633 GetCodeAgeAndParity(stub, age, parity); |
634 } | 634 } |
635 } | 635 } |
636 | 636 |
637 | 637 |
638 void Code::PatchPlatformCodeAge(Isolate* isolate, | 638 void Code::PatchPlatformCodeAge(byte* sequence, |
639 byte* sequence, | |
640 Code::Age age, | 639 Code::Age age, |
641 MarkingParity parity) { | 640 MarkingParity parity) { |
642 uint32_t young_length; | 641 uint32_t young_length; |
643 byte* young_sequence = GetNoCodeAgeSequence(&young_length); | 642 byte* young_sequence = GetNoCodeAgeSequence(&young_length); |
644 if (age == kNoAge) { | 643 if (age == kNoAge) { |
645 CopyBytes(sequence, young_sequence, young_length); | 644 CopyBytes(sequence, young_sequence, young_length); |
646 CPU::FlushICache(sequence, young_length); | 645 CPU::FlushICache(sequence, young_length); |
647 } else { | 646 } else { |
648 Code* stub = GetCodeAgeStub(isolate, age, parity); | 647 Code* stub = GetCodeAgeStub(age, parity); |
649 CodePatcher patcher(sequence, young_length / Assembler::kInstrSize); | 648 CodePatcher patcher(sequence, young_length / Assembler::kInstrSize); |
650 // Mark this code sequence for FindPlatformCodeAgeSequence() | 649 // Mark this code sequence for FindPlatformCodeAgeSequence() |
651 patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP); | 650 patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP); |
652 // Save the function's original return address | 651 // Save the function's original return address |
653 // (it will be clobbered by Call(t9)) | 652 // (it will be clobbered by Call(t9)) |
654 patcher.masm()->mov(at, ra); | 653 patcher.masm()->mov(at, ra); |
655 // Load the stub address to t9 and call it | 654 // Load the stub address to t9 and call it |
656 patcher.masm()->li(t9, | 655 patcher.masm()->li(t9, |
657 Operand(reinterpret_cast<uint32_t>(stub->instruction_start()))); | 656 Operand(reinterpret_cast<uint32_t>(stub->instruction_start()))); |
658 patcher.masm()->Call(t9); | 657 patcher.masm()->Call(t9); |
659 // Record the stub address in the empty space for GetCodeAgeAndParity() | 658 // Record the stub address in the empty space for GetCodeAgeAndParity() |
660 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); | 659 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); |
661 } | 660 } |
662 } | 661 } |
663 | 662 |
664 | 663 |
665 #undef __ | 664 #undef __ |
666 | 665 |
667 } } // namespace v8::internal | 666 } } // namespace v8::internal |
668 | 667 |
669 #endif // V8_TARGET_ARCH_MIPS | 668 #endif // V8_TARGET_ARCH_MIPS |
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