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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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591 // desc. GetCode() is idempotent; it returns the same result if no other | 591 // desc. GetCode() is idempotent; it returns the same result if no other |
592 // Assembler functions are invoked in between GetCode() calls. | 592 // Assembler functions are invoked in between GetCode() calls. |
593 void GetCode(CodeDesc* desc); | 593 void GetCode(CodeDesc* desc); |
594 | 594 |
595 // Read/Modify the code target in the branch/call instruction at pc. | 595 // Read/Modify the code target in the branch/call instruction at pc. |
596 inline static Address target_address_at(Address pc); | 596 inline static Address target_address_at(Address pc); |
597 inline static void set_target_address_at(Address pc, Address target); | 597 inline static void set_target_address_at(Address pc, Address target); |
598 | 598 |
599 // This sets the branch destination (which is in the instruction on x86). | 599 // This sets the branch destination (which is in the instruction on x86). |
600 // This is for calls and branches within generated code. | 600 // This is for calls and branches within generated code. |
601 inline static void set_target_at(Address instruction_payload, | 601 inline static void deserialization_set_special_target_at( |
602 Address target) { | 602 Address instruction_payload, Address target) { |
603 set_target_address_at(instruction_payload, target); | 603 set_target_address_at(instruction_payload, target); |
604 } | 604 } |
605 | 605 |
606 // This sets the branch destination (which is in the instruction on x86). | 606 // This sets the branch destination (which is in the instruction on x86). |
607 // This is for calls and branches to runtime code. | 607 // This is for calls and branches to runtime code. |
608 inline static void set_external_target_at(Address instruction_payload, | 608 inline static void set_external_target_at(Address instruction_payload, |
609 Address target) { | 609 Address target) { |
610 set_target_address_at(instruction_payload, target); | 610 set_target_address_at(instruction_payload, target); |
611 } | 611 } |
612 | 612 |
613 static const int kCallTargetSize = kPointerSize; | 613 static const int kSpecialTargetSize = kPointerSize; |
614 static const int kExternalTargetSize = kPointerSize; | |
615 | 614 |
616 // Distance between the address of the code target in the call instruction | 615 // Distance between the address of the code target in the call instruction |
617 // and the return address | 616 // and the return address |
618 static const int kCallTargetAddressOffset = kPointerSize; | 617 static const int kCallTargetAddressOffset = kPointerSize; |
619 // Distance between start of patched return sequence and the emitted address | 618 // Distance between start of patched return sequence and the emitted address |
620 // to jump to. | 619 // to jump to. |
621 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. | 620 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. |
622 | 621 |
623 // Distance between start of patched debug break slot and the emitted address | 622 // Distance between start of patched debug break slot and the emitted address |
624 // to jump to. | 623 // to jump to. |
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1212 private: | 1211 private: |
1213 Assembler* assembler_; | 1212 Assembler* assembler_; |
1214 #ifdef DEBUG | 1213 #ifdef DEBUG |
1215 int space_before_; | 1214 int space_before_; |
1216 #endif | 1215 #endif |
1217 }; | 1216 }; |
1218 | 1217 |
1219 } } // namespace v8::internal | 1218 } } // namespace v8::internal |
1220 | 1219 |
1221 #endif // V8_IA32_ASSEMBLER_IA32_H_ | 1220 #endif // V8_IA32_ASSEMBLER_IA32_H_ |
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