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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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432 | 432 |
433 // GetCode emits any pending (non-emitted) code and fills the descriptor | 433 // GetCode emits any pending (non-emitted) code and fills the descriptor |
434 // desc. GetCode() is idempotent; it returns the same result if no other | 434 // desc. GetCode() is idempotent; it returns the same result if no other |
435 // Assembler functions are invoked in between GetCode() calls. | 435 // Assembler functions are invoked in between GetCode() calls. |
436 void GetCode(CodeDesc* desc); | 436 void GetCode(CodeDesc* desc); |
437 | 437 |
438 // Read/Modify the code target in the branch/call instruction at pc. | 438 // Read/Modify the code target in the branch/call instruction at pc. |
439 inline static Address target_address_at(Address pc); | 439 inline static Address target_address_at(Address pc); |
440 inline static void set_target_address_at(Address pc, Address target); | 440 inline static void set_target_address_at(Address pc, Address target); |
441 | 441 |
| 442 // This sets the branch destination (which is in the instruction on x86). |
| 443 inline static void set_target_at(Address instruction_payload, |
| 444 Address target) { |
| 445 set_target_address_at(instruction_payload, target); |
| 446 } |
| 447 |
442 static const int kCallTargetSize = kPointerSize; | 448 static const int kCallTargetSize = kPointerSize; |
443 | 449 |
444 // Distance between the address of the code target in the call instruction | 450 // Distance between the address of the code target in the call instruction |
445 // and the return address | 451 // and the return address |
446 static const int kCallTargetAddressOffset = kPointerSize; | 452 static const int kCallTargetAddressOffset = kPointerSize; |
447 // Distance between start of patched return sequence and the emitted address | 453 // Distance between start of patched return sequence and the emitted address |
448 // to jump to. | 454 // to jump to. |
449 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. | 455 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. |
450 | 456 |
451 | 457 |
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877 private: | 883 private: |
878 Assembler* assembler_; | 884 Assembler* assembler_; |
879 #ifdef DEBUG | 885 #ifdef DEBUG |
880 int space_before_; | 886 int space_before_; |
881 #endif | 887 #endif |
882 }; | 888 }; |
883 | 889 |
884 } } // namespace v8::internal | 890 } } // namespace v8::internal |
885 | 891 |
886 #endif // V8_IA32_ASSEMBLER_IA32_H_ | 892 #endif // V8_IA32_ASSEMBLER_IA32_H_ |
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