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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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| 489 | 489 |
| 490 // Read/Modify the code target in the relative branch/call instruction at pc. | 490 // Read/Modify the code target in the relative branch/call instruction at pc. |
| 491 // On the x64 architecture, we use relative jumps with a 32-bit displacement | 491 // On the x64 architecture, we use relative jumps with a 32-bit displacement |
| 492 // to jump to other Code objects in the Code space in the heap. | 492 // to jump to other Code objects in the Code space in the heap. |
| 493 // Jumps to C functions are done indirectly through a 64-bit register holding | 493 // Jumps to C functions are done indirectly through a 64-bit register holding |
| 494 // the absolute address of the target. | 494 // the absolute address of the target. |
| 495 // These functions convert between absolute Addresses of Code objects and | 495 // These functions convert between absolute Addresses of Code objects and |
| 496 // the relative displacements stored in the code. | 496 // the relative displacements stored in the code. |
| 497 static inline Address target_address_at(Address pc, Address constant_pool); | 497 static inline Address target_address_at(Address pc, Address constant_pool); |
| 498 static inline void set_target_address_at( | 498 static inline void set_target_address_at( |
| 499 Address pc, Address constant_pool, Address target, | 499 Isolate* isolate, Address pc, Address constant_pool, Address target, |
| 500 ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED); | 500 ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED); |
| 501 static inline Address target_address_at(Address pc, Code* code) { | 501 static inline Address target_address_at(Address pc, Code* code) { |
| 502 Address constant_pool = code ? code->constant_pool() : NULL; | 502 Address constant_pool = code ? code->constant_pool() : NULL; |
| 503 return target_address_at(pc, constant_pool); | 503 return target_address_at(pc, constant_pool); |
| 504 } | 504 } |
| 505 static inline void set_target_address_at(Address pc, | 505 static inline void set_target_address_at( |
| 506 Code* code, | 506 Isolate* isolate, Address pc, Code* code, Address target, |
| 507 Address target, | 507 ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED) { |
| 508 ICacheFlushMode icache_flush_mode = | |
| 509 FLUSH_ICACHE_IF_NEEDED) { | |
| 510 Address constant_pool = code ? code->constant_pool() : NULL; | 508 Address constant_pool = code ? code->constant_pool() : NULL; |
| 511 set_target_address_at(pc, constant_pool, target, icache_flush_mode); | 509 set_target_address_at(isolate, pc, constant_pool, target, |
| 510 icache_flush_mode); |
| 512 } | 511 } |
| 513 | 512 |
| 514 // Return the code target address at a call site from the return address | 513 // Return the code target address at a call site from the return address |
| 515 // of that call in the instruction stream. | 514 // of that call in the instruction stream. |
| 516 static inline Address target_address_from_return_address(Address pc); | 515 static inline Address target_address_from_return_address(Address pc); |
| 517 | 516 |
| 518 // This sets the branch destination (which is in the instruction on x64). | 517 // This sets the branch destination (which is in the instruction on x64). |
| 519 // This is for calls and branches within generated code. | 518 // This is for calls and branches within generated code. |
| 520 inline static void deserialization_set_special_target_at( | 519 inline static void deserialization_set_special_target_at( |
| 521 Address instruction_payload, Code* code, Address target) { | 520 Isolate* isolate, Address instruction_payload, Code* code, |
| 522 set_target_address_at(instruction_payload, code, target); | 521 Address target) { |
| 522 set_target_address_at(isolate, instruction_payload, code, target); |
| 523 } | 523 } |
| 524 | 524 |
| 525 // This sets the internal reference at the pc. | 525 // This sets the internal reference at the pc. |
| 526 inline static void deserialization_set_target_internal_reference_at( | 526 inline static void deserialization_set_target_internal_reference_at( |
| 527 Address pc, Address target, | 527 Isolate* isolate, Address pc, Address target, |
| 528 RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE); | 528 RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE); |
| 529 | 529 |
| 530 static inline RelocInfo::Mode RelocInfoNone() { | 530 static inline RelocInfo::Mode RelocInfoNone() { |
| 531 if (kPointerSize == kInt64Size) { | 531 if (kPointerSize == kInt64Size) { |
| 532 return RelocInfo::NONE64; | 532 return RelocInfo::NONE64; |
| 533 } else { | 533 } else { |
| 534 DCHECK(kPointerSize == kInt32Size); | 534 DCHECK(kPointerSize == kInt32Size); |
| 535 return RelocInfo::NONE32; | 535 return RelocInfo::NONE32; |
| 536 } | 536 } |
| 537 } | 537 } |
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| 2189 Assembler* assembler_; | 2189 Assembler* assembler_; |
| 2190 #ifdef DEBUG | 2190 #ifdef DEBUG |
| 2191 int space_before_; | 2191 int space_before_; |
| 2192 #endif | 2192 #endif |
| 2193 }; | 2193 }; |
| 2194 | 2194 |
| 2195 } // namespace internal | 2195 } // namespace internal |
| 2196 } // namespace v8 | 2196 } // namespace v8 |
| 2197 | 2197 |
| 2198 #endif // V8_X64_ASSEMBLER_X64_H_ | 2198 #endif // V8_X64_ASSEMBLER_X64_H_ |
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