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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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362 | 362 |
363 | 363 |
364 bool RelocInfo::IsPatchedReturnSequence() { | 364 bool RelocInfo::IsPatchedReturnSequence() { |
365 // The recognized call sequence is: | 365 // The recognized call sequence is: |
366 // movq(kScratchRegister, immediate64); call(kScratchRegister); | 366 // movq(kScratchRegister, immediate64); call(kScratchRegister); |
367 // It only needs to be distinguished from a return sequence | 367 // It only needs to be distinguished from a return sequence |
368 // movq(rsp, rbp); pop(rbp); ret(n); int3 *6 | 368 // movq(rsp, rbp); pop(rbp); ret(n); int3 *6 |
369 // The 11th byte is int3 (0xCC) in the return sequence and | 369 // The 11th byte is int3 (0xCC) in the return sequence and |
370 // REX.WB (0x48+register bit) for the call sequence. | 370 // REX.WB (0x48+register bit) for the call sequence. |
371 #ifdef ENABLE_DEBUGGER_SUPPORT | 371 #ifdef ENABLE_DEBUGGER_SUPPORT |
372 return pc_[10] != 0xCC; | 372 return pc_[2 + kPointerSize] != 0xCC; |
373 #else | 373 #else |
374 return false; | 374 return false; |
375 #endif | 375 #endif |
376 } | 376 } |
377 | 377 |
378 | 378 |
379 bool RelocInfo::IsPatchedDebugBreakSlotSequence() { | 379 bool RelocInfo::IsPatchedDebugBreakSlotSequence() { |
380 return !Assembler::IsNop(pc()); | 380 return !Assembler::IsNop(pc()); |
381 } | 381 } |
382 | 382 |
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529 ASSERT(len_ == 1 || len_ == 2); | 529 ASSERT(len_ == 1 || len_ == 2); |
530 int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); | 530 int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); |
531 *p = disp; | 531 *p = disp; |
532 len_ += sizeof(int32_t); | 532 len_ += sizeof(int32_t); |
533 } | 533 } |
534 | 534 |
535 | 535 |
536 } } // namespace v8::internal | 536 } } // namespace v8::internal |
537 | 537 |
538 #endif // V8_X64_ASSEMBLER_X64_INL_H_ | 538 #endif // V8_X64_ASSEMBLER_X64_INL_H_ |
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