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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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578 | 578 |
579 // Trampoline stub to call into native code. To call safely into native code | 579 // Trampoline stub to call into native code. To call safely into native code |
580 // in the presence of compacting GC (which can move code objects) we need to | 580 // in the presence of compacting GC (which can move code objects) we need to |
581 // keep the code which called into native pinned in the memory. Currently the | 581 // keep the code which called into native pinned in the memory. Currently the |
582 // simplest approach is to generate such stub early enough so it can never be | 582 // simplest approach is to generate such stub early enough so it can never be |
583 // moved by GC | 583 // moved by GC |
584 class DirectCEntryStub: public PlatformCodeStub { | 584 class DirectCEntryStub: public PlatformCodeStub { |
585 public: | 585 public: |
586 DirectCEntryStub() {} | 586 DirectCEntryStub() {} |
587 void Generate(MacroAssembler* masm); | 587 void Generate(MacroAssembler* masm); |
588 void GenerateCall(MacroAssembler* masm, ExternalReference function); | |
589 void GenerateCall(MacroAssembler* masm, Register target); | 588 void GenerateCall(MacroAssembler* masm, Register target); |
590 | 589 |
591 private: | 590 private: |
592 Major MajorKey() { return DirectCEntry; } | 591 Major MajorKey() { return DirectCEntry; } |
593 int MinorKey() { return 0; } | 592 int MinorKey() { return 0; } |
594 | 593 |
595 bool NeedsImmovableCode() { return true; } | 594 bool NeedsImmovableCode() { return true; } |
596 }; | 595 }; |
597 | 596 |
598 | 597 |
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642 | 641 |
643 class LookupModeBits: public BitField<LookupMode, 0, 1> {}; | 642 class LookupModeBits: public BitField<LookupMode, 0, 1> {}; |
644 | 643 |
645 LookupMode mode_; | 644 LookupMode mode_; |
646 }; | 645 }; |
647 | 646 |
648 | 647 |
649 } } // namespace v8::internal | 648 } } // namespace v8::internal |
650 | 649 |
651 #endif // V8_ARM_CODE_STUBS_ARM_H_ | 650 #endif // V8_ARM_CODE_STUBS_ARM_H_ |
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