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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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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). | 442 // This sets the branch destination (which is in the instruction on x86). |
| 443 // This is for calls and branches within generated code. |
443 inline static void set_target_at(Address instruction_payload, | 444 inline static void set_target_at(Address instruction_payload, |
444 Address target) { | 445 Address target) { |
445 set_target_address_at(instruction_payload, target); | 446 set_target_address_at(instruction_payload, target); |
446 } | 447 } |
447 | 448 |
| 449 // This sets the branch destination (which is in the instruction on x86). |
| 450 // This is for calls and branches to runtime code. |
| 451 inline static void set_external_target_at(Address instruction_payload, |
| 452 Address target) { |
| 453 set_target_address_at(instruction_payload, target); |
| 454 } |
| 455 |
448 static const int kCallTargetSize = kPointerSize; | 456 static const int kCallTargetSize = kPointerSize; |
| 457 static const int kExternalTargetSize = kPointerSize; |
449 | 458 |
450 // Distance between the address of the code target in the call instruction | 459 // Distance between the address of the code target in the call instruction |
451 // and the return address | 460 // and the return address |
452 static const int kCallTargetAddressOffset = kPointerSize; | 461 static const int kCallTargetAddressOffset = kPointerSize; |
453 // Distance between start of patched return sequence and the emitted address | 462 // Distance between start of patched return sequence and the emitted address |
454 // to jump to. | 463 // to jump to. |
455 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. | 464 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. |
456 | 465 |
457 | 466 |
458 // --------------------------------------------------------------------------- | 467 // --------------------------------------------------------------------------- |
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883 private: | 892 private: |
884 Assembler* assembler_; | 893 Assembler* assembler_; |
885 #ifdef DEBUG | 894 #ifdef DEBUG |
886 int space_before_; | 895 int space_before_; |
887 #endif | 896 #endif |
888 }; | 897 }; |
889 | 898 |
890 } } // namespace v8::internal | 899 } } // namespace v8::internal |
891 | 900 |
892 #endif // V8_IA32_ASSEMBLER_IA32_H_ | 901 #endif // V8_IA32_ASSEMBLER_IA32_H_ |
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