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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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| 528 // Assembler functions are invoked in between GetCode() calls. | 528 // Assembler functions are invoked in between GetCode() calls. |
| 529 void GetCode(CodeDesc* desc); | 529 void GetCode(CodeDesc* desc); |
| 530 | 530 |
| 531 // Read/Modify the code target in the relative branch/call instruction at pc. | 531 // Read/Modify the code target in the relative branch/call instruction at pc. |
| 532 // On the x64 architecture, we use relative jumps with a 32-bit displacement | 532 // On the x64 architecture, we use relative jumps with a 32-bit displacement |
| 533 // to jump to other Code objects in the Code space in the heap. | 533 // to jump to other Code objects in the Code space in the heap. |
| 534 // Jumps to C functions are done indirectly through a 64-bit register holding | 534 // Jumps to C functions are done indirectly through a 64-bit register holding |
| 535 // the absolute address of the target. | 535 // the absolute address of the target. |
| 536 // These functions convert between absolute Addresses of Code objects and | 536 // These functions convert between absolute Addresses of Code objects and |
| 537 // the relative displacements stored in the code. | 537 // the relative displacements stored in the code. |
| 538 static inline Address target_address_at(Address pc, | 538 static inline Address target_address_at(Address pc, Address constant_pool); |
| 539 ConstantPoolArray* constant_pool); | 539 static inline void set_target_address_at( |
| 540 static inline void set_target_address_at(Address pc, | 540 Address pc, Address constant_pool, Address target, |
| 541 ConstantPoolArray* constant_pool, | 541 ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED); |
| 542 Address target, | |
| 543 ICacheFlushMode icache_flush_mode = | |
| 544 FLUSH_ICACHE_IF_NEEDED) ; | |
| 545 static inline Address target_address_at(Address pc, Code* code) { | 542 static inline Address target_address_at(Address pc, Code* code) { |
| 546 ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL; | 543 Address constant_pool = code ? code->constant_pool() : NULL; |
| 547 return target_address_at(pc, constant_pool); | 544 return target_address_at(pc, constant_pool); |
| 548 } | 545 } |
| 549 static inline void set_target_address_at(Address pc, | 546 static inline void set_target_address_at(Address pc, |
| 550 Code* code, | 547 Code* code, |
| 551 Address target, | 548 Address target, |
| 552 ICacheFlushMode icache_flush_mode = | 549 ICacheFlushMode icache_flush_mode = |
| 553 FLUSH_ICACHE_IF_NEEDED) { | 550 FLUSH_ICACHE_IF_NEEDED) { |
| 554 ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL; | 551 Address constant_pool = code ? code->constant_pool() : NULL; |
| 555 set_target_address_at(pc, constant_pool, target, icache_flush_mode); | 552 set_target_address_at(pc, constant_pool, target, icache_flush_mode); |
| 556 } | 553 } |
| 557 | 554 |
| 558 // Return the code target address at a call site from the return address | 555 // Return the code target address at a call site from the return address |
| 559 // of that call in the instruction stream. | 556 // of that call in the instruction stream. |
| 560 static inline Address target_address_from_return_address(Address pc); | 557 static inline Address target_address_from_return_address(Address pc); |
| 561 | 558 |
| 562 // Return the code target address of the patch debug break slot | 559 // Return the code target address of the patch debug break slot |
| 563 inline static Address break_address_from_return_address(Address pc); | 560 inline static Address break_address_from_return_address(Address pc); |
| 564 | 561 |
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| 1621 void RecordDebugBreakSlot(); | 1618 void RecordDebugBreakSlot(); |
| 1622 | 1619 |
| 1623 // Record a comment relocation entry that can be used by a disassembler. | 1620 // Record a comment relocation entry that can be used by a disassembler. |
| 1624 // Use --code-comments to enable. | 1621 // Use --code-comments to enable. |
| 1625 void RecordComment(const char* msg); | 1622 void RecordComment(const char* msg); |
| 1626 | 1623 |
| 1627 // Record a deoptimization reason that can be used by a log or cpu profiler. | 1624 // Record a deoptimization reason that can be used by a log or cpu profiler. |
| 1628 // Use --trace-deopt to enable. | 1625 // Use --trace-deopt to enable. |
| 1629 void RecordDeoptReason(const int reason, const SourcePosition position); | 1626 void RecordDeoptReason(const int reason, const SourcePosition position); |
| 1630 | 1627 |
| 1631 // Allocate a constant pool of the correct size for the generated code. | 1628 void SetConstantPoolOffset(int pos, int offset, |
| 1632 Handle<ConstantPoolArray> NewConstantPool(Isolate* isolate); | 1629 ConstantPoolEntry::Access access, |
| 1633 | 1630 ConstantPoolEntry::Type type) { |
| 1634 // Generate the constant pool for the generated code. | 1631 // No embedded constant pool support. |
| 1635 void PopulateConstantPool(ConstantPoolArray* constant_pool); | 1632 UNREACHABLE(); |
| 1633 } |
| 1636 | 1634 |
| 1637 // Writes a single word of data in the code stream. | 1635 // Writes a single word of data in the code stream. |
| 1638 // Used for inline tables, e.g., jump-tables. | 1636 // Used for inline tables, e.g., jump-tables. |
| 1639 void db(uint8_t data); | 1637 void db(uint8_t data); |
| 1640 void dd(uint32_t data); | 1638 void dd(uint32_t data); |
| 1639 void dq(uint64_t data); |
| 1640 void dp(uintptr_t data) { dq(data); } |
| 1641 void dq(Label* label); | 1641 void dq(Label* label); |
| 1642 | 1642 |
| 1643 PositionsRecorder* positions_recorder() { return &positions_recorder_; } | 1643 PositionsRecorder* positions_recorder() { return &positions_recorder_; } |
| 1644 | 1644 |
| 1645 // Check if there is less than kGap bytes available in the buffer. | 1645 // Check if there is less than kGap bytes available in the buffer. |
| 1646 // If this is the case, we need to grow the buffer before emitting | 1646 // If this is the case, we need to grow the buffer before emitting |
| 1647 // an instruction or relocation information. | 1647 // an instruction or relocation information. |
| 1648 inline bool buffer_overflow() const { | 1648 inline bool buffer_overflow() const { |
| 1649 return pc_ >= reloc_info_writer.pos() - kGap; | 1649 return pc_ >= reloc_info_writer.pos() - kGap; |
| 1650 } | 1650 } |
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| 2156 private: | 2156 private: |
| 2157 Assembler* assembler_; | 2157 Assembler* assembler_; |
| 2158 #ifdef DEBUG | 2158 #ifdef DEBUG |
| 2159 int space_before_; | 2159 int space_before_; |
| 2160 #endif | 2160 #endif |
| 2161 }; | 2161 }; |
| 2162 | 2162 |
| 2163 } } // namespace v8::internal | 2163 } } // namespace v8::internal |
| 2164 | 2164 |
| 2165 #endif // V8_X64_ASSEMBLER_X64_H_ | 2165 #endif // V8_X64_ASSEMBLER_X64_H_ |
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