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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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358 static const int kMaxCallSize = 6; | 358 static const int kMaxCallSize = 6; |
359 | 359 |
360 // The maximum pc delta that will use the short encoding. | 360 // The maximum pc delta that will use the short encoding. |
361 static const int kMaxSmallPCDelta; | 361 static const int kMaxSmallPCDelta; |
362 | 362 |
363 enum Mode { | 363 enum Mode { |
364 // Please note the order is important (see IsCodeTarget, IsGCRelocMode). | 364 // Please note the order is important (see IsCodeTarget, IsGCRelocMode). |
365 CODE_TARGET, // Code target which is not any of the above. | 365 CODE_TARGET, // Code target which is not any of the above. |
366 CODE_TARGET_WITH_ID, | 366 CODE_TARGET_WITH_ID, |
367 CONSTRUCT_CALL, // code target that is a call to a JavaScript constructor. | 367 CONSTRUCT_CALL, // code target that is a call to a JavaScript constructor. |
368 DEBUG_BREAK, // Code target for the debugger statement. | 368 DEBUG_BREAK, // Code target for the debugger statement. |
369 EMBEDDED_OBJECT, | 369 EMBEDDED_OBJECT, |
370 CELL, | 370 CELL, |
371 | 371 |
372 // Everything after runtime_entry (inclusive) is not GC'ed. | 372 // Everything after runtime_entry (inclusive) is not GC'ed. |
373 RUNTIME_ENTRY, | 373 RUNTIME_ENTRY, |
374 JS_RETURN, // Marks start of the ExitJSFrame code. | 374 JS_RETURN, // Marks start of the ExitJSFrame code. |
375 COMMENT, | 375 COMMENT, |
376 DEOPT_REASON, // Deoptimization reason index. | 376 POSITION, // See comment for kNoPosition above. |
377 POSITION, // See comment for kNoPosition above. | |
378 STATEMENT_POSITION, // See comment for kNoPosition above. | 377 STATEMENT_POSITION, // See comment for kNoPosition above. |
379 DEBUG_BREAK_SLOT, // Additional code inserted for debug break slot. | 378 DEBUG_BREAK_SLOT, // Additional code inserted for debug break slot. |
380 EXTERNAL_REFERENCE, // The address of an external C++ function. | 379 EXTERNAL_REFERENCE, // The address of an external C++ function. |
381 INTERNAL_REFERENCE, // An address inside the same function. | 380 INTERNAL_REFERENCE, // An address inside the same function. |
382 | 381 |
383 // Marks constant and veneer pools. Only used on ARM and ARM64. | 382 // Marks constant and veneer pools. Only used on ARM and ARM64. |
384 // They use a custom noncompact encoding. | 383 // They use a custom noncompact encoding. |
385 CONST_POOL, | 384 CONST_POOL, |
386 VENEER_POOL, | 385 VENEER_POOL, |
387 | 386 |
388 // add more as needed | 387 // add more as needed |
389 // Pseudo-types | 388 // Pseudo-types |
390 NUMBER_OF_MODES, // There are at most 15 modes with noncompact encoding. | 389 NUMBER_OF_MODES, // There are at most 15 modes with noncompact encoding. |
391 NONE32, // never recorded 32-bit value | 390 NONE32, // never recorded 32-bit value |
392 NONE64, // never recorded 64-bit value | 391 NONE64, // never recorded 64-bit value |
393 CODE_AGE_SEQUENCE, // Not stored in RelocInfo array, used explictly by | 392 CODE_AGE_SEQUENCE, // Not stored in RelocInfo array, used explictly by |
394 // code aging. | 393 // code aging. |
395 FIRST_REAL_RELOC_MODE = CODE_TARGET, | 394 FIRST_REAL_RELOC_MODE = CODE_TARGET, |
396 LAST_REAL_RELOC_MODE = VENEER_POOL, | 395 LAST_REAL_RELOC_MODE = VENEER_POOL, |
397 FIRST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE, | 396 FIRST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE, |
398 LAST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE, | 397 LAST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE, |
399 LAST_CODE_ENUM = DEBUG_BREAK, | 398 LAST_CODE_ENUM = DEBUG_BREAK, |
400 LAST_GCED_ENUM = CELL, | 399 LAST_GCED_ENUM = CELL, |
401 // Modes <= LAST_COMPACT_ENUM are guaranteed to have compact encoding. | 400 // Modes <= LAST_COMPACT_ENUM are guaranteed to have compact encoding. |
402 LAST_COMPACT_ENUM = CODE_TARGET_WITH_ID, | 401 LAST_COMPACT_ENUM = CODE_TARGET_WITH_ID, |
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727 void ReadTaggedPC(); | 726 void ReadTaggedPC(); |
728 void AdvanceReadPC(); | 727 void AdvanceReadPC(); |
729 void AdvanceReadId(); | 728 void AdvanceReadId(); |
730 void AdvanceReadPoolData(); | 729 void AdvanceReadPoolData(); |
731 void AdvanceReadPosition(); | 730 void AdvanceReadPosition(); |
732 void AdvanceReadData(); | 731 void AdvanceReadData(); |
733 void AdvanceReadVariableLengthPCJump(); | 732 void AdvanceReadVariableLengthPCJump(); |
734 int GetLocatableTypeTag(); | 733 int GetLocatableTypeTag(); |
735 void ReadTaggedId(); | 734 void ReadTaggedId(); |
736 void ReadTaggedPosition(); | 735 void ReadTaggedPosition(); |
737 void ReadTaggedData(); | |
738 | 736 |
739 // If the given mode is wanted, set it in rinfo_ and return true. | 737 // If the given mode is wanted, set it in rinfo_ and return true. |
740 // Else return false. Used for efficiently skipping unwanted modes. | 738 // Else return false. Used for efficiently skipping unwanted modes. |
741 bool SetMode(RelocInfo::Mode mode) { | 739 bool SetMode(RelocInfo::Mode mode) { |
742 return (mode_mask_ & (1 << mode)) ? (rinfo_.rmode_ = mode, true) : false; | 740 return (mode_mask_ & (1 << mode)) ? (rinfo_.rmode_ = mode, true) : false; |
743 } | 741 } |
744 | 742 |
745 byte* pos_; | 743 byte* pos_; |
746 byte* end_; | 744 byte* end_; |
747 byte* code_age_sequence_; | 745 byte* code_age_sequence_; |
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1131 NullCallWrapper() { } | 1129 NullCallWrapper() { } |
1132 virtual ~NullCallWrapper() { } | 1130 virtual ~NullCallWrapper() { } |
1133 virtual void BeforeCall(int call_size) const { } | 1131 virtual void BeforeCall(int call_size) const { } |
1134 virtual void AfterCall() const { } | 1132 virtual void AfterCall() const { } |
1135 }; | 1133 }; |
1136 | 1134 |
1137 | 1135 |
1138 } } // namespace v8::internal | 1136 } } // namespace v8::internal |
1139 | 1137 |
1140 #endif // V8_ASSEMBLER_H_ | 1138 #endif // V8_ASSEMBLER_H_ |
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