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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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373 | 373 |
374 // Allocation support helpers. | 374 // Allocation support helpers. |
375 void LoadAllocationTopHelper(Register result, | 375 void LoadAllocationTopHelper(Register result, |
376 Register result_end, | 376 Register result_end, |
377 Register scratch, | 377 Register scratch, |
378 AllocationFlags flags); | 378 AllocationFlags flags); |
379 void UpdateAllocationTopHelper(Register result_end, Register scratch); | 379 void UpdateAllocationTopHelper(Register result_end, Register scratch); |
380 }; | 380 }; |
381 | 381 |
382 | 382 |
383 // The code patcher is used to patch (typically) small parts of code e.g. for | |
384 // debugging and other types of instrumentation. When using the code patcher | |
385 // the exact number of bytes specified must be emitted. Is not legal to emit | |
386 // relocation information. If any of these constraints are violated it causes | |
387 // an assertion. | |
388 class CodePatcher { | |
389 public: | |
390 CodePatcher(byte* address, int size); | |
391 virtual ~CodePatcher(); | |
392 | |
393 // Macro assembler to emit code. | |
394 MacroAssembler* masm() { return &masm_; } | |
395 | |
396 private: | |
397 byte* address_; // The address of the code being patched. | |
398 int size_; // Number of bytes of the expected patch size. | |
399 MacroAssembler masm_; // Macro assembler used to generate the code. | |
400 }; | |
401 | |
402 | |
403 // ----------------------------------------------------------------------------- | 383 // ----------------------------------------------------------------------------- |
404 // Static helper functions. | 384 // Static helper functions. |
405 | 385 |
406 // Generate an Operand for loading a field from an object. | 386 // Generate an Operand for loading a field from an object. |
407 static inline Operand FieldOperand(Register object, int offset) { | 387 static inline Operand FieldOperand(Register object, int offset) { |
408 return Operand(object, offset - kHeapObjectTag); | 388 return Operand(object, offset - kHeapObjectTag); |
409 } | 389 } |
410 | 390 |
411 | 391 |
412 // Generate an Operand for loading an indexed field from an object. | 392 // Generate an Operand for loading an indexed field from an object. |
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436 } \ | 416 } \ |
437 masm-> | 417 masm-> |
438 #else | 418 #else |
439 #define ACCESS_MASM(masm) masm-> | 419 #define ACCESS_MASM(masm) masm-> |
440 #endif | 420 #endif |
441 | 421 |
442 | 422 |
443 } } // namespace v8::internal | 423 } } // namespace v8::internal |
444 | 424 |
445 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ | 425 #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |
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