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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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| 548 // Assembler functions are invoked in between GetCode() calls. | 548 // Assembler functions are invoked in between GetCode() calls. |
| 549 void GetCode(CodeDesc* desc); | 549 void GetCode(CodeDesc* desc); |
| 550 | 550 |
| 551 // Read/Modify the code target in the relative branch/call instruction at pc. | 551 // Read/Modify the code target in the relative branch/call instruction at pc. |
| 552 // On the x64 architecture, we use relative jumps with a 32-bit displacement | 552 // On the x64 architecture, we use relative jumps with a 32-bit displacement |
| 553 // to jump to other Code objects in the Code space in the heap. | 553 // to jump to other Code objects in the Code space in the heap. |
| 554 // Jumps to C functions are done indirectly through a 64-bit register holding | 554 // Jumps to C functions are done indirectly through a 64-bit register holding |
| 555 // the absolute address of the target. | 555 // the absolute address of the target. |
| 556 // These functions convert between absolute Addresses of Code objects and | 556 // These functions convert between absolute Addresses of Code objects and |
| 557 // the relative displacements stored in the code. | 557 // the relative displacements stored in the code. |
| 558 static inline Address target_address_at(Address pc, | 558 static inline Address target_address_at(Address pc); |
| 559 ConstantPoolArray* constant_pool); | 559 static inline void set_target_address_at(Address pc, Address target); |
| 560 static inline void set_target_address_at(Address pc, | |
| 561 ConstantPoolArray* constant_pool, | |
| 562 Address target); | |
| 563 static inline Address target_address_at(Address pc, Code* code) { | |
| 564 return target_address_at(pc, code->constant_pool()); | |
| 565 } | |
| 566 static inline void set_target_address_at(Address pc, | |
| 567 Code* code, | |
| 568 Address target) { | |
| 569 set_target_address_at(pc, code->constant_pool(), target); | |
| 570 } | |
| 571 | 560 |
| 572 // Return the code target address at a call site from the return address | 561 // Return the code target address at a call site from the return address |
| 573 // of that call in the instruction stream. | 562 // of that call in the instruction stream. |
| 574 static inline Address target_address_from_return_address(Address pc); | 563 static inline Address target_address_from_return_address(Address pc); |
| 575 | 564 |
| 576 // This sets the branch destination (which is in the instruction on x64). | 565 // This sets the branch destination (which is in the instruction on x64). |
| 577 // This is for calls and branches within generated code. | 566 // This is for calls and branches within generated code. |
| 578 inline static void deserialization_set_special_target_at( | 567 inline static void deserialization_set_special_target_at( |
| 579 Address instruction_payload, Code* code, Address target) { | 568 Address instruction_payload, Address target) { |
| 580 set_target_address_at(instruction_payload, code, target); | 569 set_target_address_at(instruction_payload, target); |
| 581 } | 570 } |
| 582 | 571 |
| 583 static inline RelocInfo::Mode RelocInfoNone() { | 572 static inline RelocInfo::Mode RelocInfoNone() { |
| 584 if (kPointerSize == kInt64Size) { | 573 if (kPointerSize == kInt64Size) { |
| 585 return RelocInfo::NONE64; | 574 return RelocInfo::NONE64; |
| 586 } else { | 575 } else { |
| 587 ASSERT(kPointerSize == kInt32Size); | 576 ASSERT(kPointerSize == kInt32Size); |
| 588 return RelocInfo::NONE32; | 577 return RelocInfo::NONE32; |
| 589 } | 578 } |
| 590 } | 579 } |
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| 1747 private: | 1736 private: |
| 1748 Assembler* assembler_; | 1737 Assembler* assembler_; |
| 1749 #ifdef DEBUG | 1738 #ifdef DEBUG |
| 1750 int space_before_; | 1739 int space_before_; |
| 1751 #endif | 1740 #endif |
| 1752 }; | 1741 }; |
| 1753 | 1742 |
| 1754 } } // namespace v8::internal | 1743 } } // namespace v8::internal |
| 1755 | 1744 |
| 1756 #endif // V8_X64_ASSEMBLER_X64_H_ | 1745 #endif // V8_X64_ASSEMBLER_X64_H_ |
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