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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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582 | 582 |
583 // Allocation support helpers. | 583 // Allocation support helpers. |
584 void LoadAllocationTopHelper(Register result, | 584 void LoadAllocationTopHelper(Register result, |
585 Register result_end, | 585 Register result_end, |
586 Register scratch, | 586 Register scratch, |
587 AllocationFlags flags); | 587 AllocationFlags flags); |
588 void UpdateAllocationTopHelper(Register result_end, Register scratch); | 588 void UpdateAllocationTopHelper(Register result_end, Register scratch); |
589 }; | 589 }; |
590 | 590 |
591 | 591 |
592 #ifdef ENABLE_DEBUGGER_SUPPORT | |
593 // The code patcher is used to patch (typically) small parts of code e.g. for | 592 // The code patcher is used to patch (typically) small parts of code e.g. for |
594 // debugging and other types of instrumentation. When using the code patcher | 593 // debugging and other types of instrumentation. When using the code patcher |
595 // the exact number of bytes specified must be emitted. Is not legal to emit | 594 // the exact number of bytes specified must be emitted. Is not legal to emit |
596 // relocation information. If any of these constraints are violated it causes | 595 // relocation information. If any of these constraints are violated it causes |
597 // an assertion. | 596 // an assertion. |
598 class CodePatcher { | 597 class CodePatcher { |
599 public: | 598 public: |
600 CodePatcher(byte* address, int size); | 599 CodePatcher(byte* address, int size); |
601 virtual ~CodePatcher(); | 600 virtual ~CodePatcher(); |
602 | 601 |
603 // Macro assembler to emit code. | 602 // Macro assembler to emit code. |
604 MacroAssembler* masm() { return &masm_; } | 603 MacroAssembler* masm() { return &masm_; } |
605 | 604 |
606 private: | 605 private: |
607 byte* address_; // The address of the code being patched. | 606 byte* address_; // The address of the code being patched. |
608 int size_; // Number of bytes of the expected patch size. | 607 int size_; // Number of bytes of the expected patch size. |
609 MacroAssembler masm_; // Macro assembler used to generate the code. | 608 MacroAssembler masm_; // Macro assembler used to generate the code. |
610 }; | 609 }; |
611 #endif // ENABLE_DEBUGGER_SUPPORT | |
612 | 610 |
613 | 611 |
614 // ----------------------------------------------------------------------------- | 612 // ----------------------------------------------------------------------------- |
615 // Static helper functions. | 613 // Static helper functions. |
616 | 614 |
617 // Generate an Operand for loading a field from an object. | 615 // Generate an Operand for loading a field from an object. |
618 static inline Operand FieldOperand(Register object, int offset) { | 616 static inline Operand FieldOperand(Register object, int offset) { |
619 return Operand(object, offset - kHeapObjectTag); | 617 return Operand(object, offset - kHeapObjectTag); |
620 } | 618 } |
621 | 619 |
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647 } \ | 645 } \ |
648 masm-> | 646 masm-> |
649 #else | 647 #else |
650 #define ACCESS_MASM(masm) masm-> | 648 #define ACCESS_MASM(masm) masm-> |
651 #endif | 649 #endif |
652 | 650 |
653 | 651 |
654 } } // namespace v8::internal | 652 } } // namespace v8::internal |
655 | 653 |
656 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ | 654 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |
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