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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 | 5 |
6 // Declares a Simulator for MIPS instructions if we are not generating a native | 6 // Declares a Simulator for MIPS instructions if we are not generating a native |
7 // MIPS binary. This Simulator allows us to run and debug MIPS code generation | 7 // MIPS binary. This Simulator allows us to run and debug MIPS code generation |
8 // on regular desktop machines. | 8 // on regular desktop machines. |
9 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro, | 9 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro, |
10 // which will start execution in the Simulator or forwards to the real entry | 10 // which will start execution in the Simulator or forwards to the real entry |
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29 typedef int (*mips_regexp_matcher)(String*, int, const byte*, const byte*, | 29 typedef int (*mips_regexp_matcher)(String*, int, const byte*, const byte*, |
30 void*, int*, int, Address, int, Isolate*); | 30 void*, int*, int, Address, int, Isolate*); |
31 | 31 |
32 | 32 |
33 // Call the generated regexp code directly. The code at the entry address | 33 // Call the generated regexp code directly. The code at the entry address |
34 // should act as a function matching the type arm_regexp_matcher. | 34 // should act as a function matching the type arm_regexp_matcher. |
35 // The fifth argument is a dummy that reserves the space used for | 35 // The fifth argument is a dummy that reserves the space used for |
36 // the return address added by the ExitFrame in native calls. | 36 // the return address added by the ExitFrame in native calls. |
37 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | 37 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ |
38 p7, p8) \ | 38 p7, p8) \ |
39 (FUNCTION_CAST<mips_regexp_matcher>(entry)(p0, p1, p2, p3, NULL, p4, p5, p6, \ | 39 (FUNCTION_CAST<mips_regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, \ |
40 p7, p8)) | 40 p8)) |
41 | 41 |
42 // The stack limit beyond which we will throw stack overflow errors in | 42 // The stack limit beyond which we will throw stack overflow errors in |
43 // generated code. Because generated code on mips uses the C stack, we | 43 // generated code. Because generated code on mips uses the C stack, we |
44 // just use the C stack limit. | 44 // just use the C stack limit. |
45 class SimulatorStack : public v8::internal::AllStatic { | 45 class SimulatorStack : public v8::internal::AllStatic { |
46 public: | 46 public: |
47 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, | 47 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, |
48 uintptr_t c_limit) { | 48 uintptr_t c_limit) { |
49 return c_limit; | 49 return c_limit; |
50 } | 50 } |
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523 | 523 |
524 | 524 |
525 // When running with the simulator transition into simulated execution at this | 525 // When running with the simulator transition into simulated execution at this |
526 // point. | 526 // point. |
527 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ | 527 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ |
528 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ | 528 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ |
529 FUNCTION_ADDR(entry), 5, p0, p1, p2, p3, p4)) | 529 FUNCTION_ADDR(entry), 5, p0, p1, p2, p3, p4)) |
530 | 530 |
531 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | 531 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ |
532 p7, p8) \ | 532 p7, p8) \ |
533 Simulator::current(isolate) \ | 533 Simulator::current(isolate)->Call(entry, 10, p0, p1, p2, p3, p4, p5, p6, p7, \ |
534 ->Call(entry, 10, p0, p1, p2, p3, NULL, p4, p5, p6, p7, p8) | 534 p8) |
535 | |
536 | 535 |
537 // The simulator has its own stack. Thus it has a different stack limit from | 536 // The simulator has its own stack. Thus it has a different stack limit from |
538 // the C-based native code. The JS-based limit normally points near the end of | 537 // the C-based native code. The JS-based limit normally points near the end of |
539 // the simulator stack. When the C-based limit is exhausted we reflect that by | 538 // the simulator stack. When the C-based limit is exhausted we reflect that by |
540 // lowering the JS-based limit as well, to make stack checks trigger. | 539 // lowering the JS-based limit as well, to make stack checks trigger. |
541 class SimulatorStack : public v8::internal::AllStatic { | 540 class SimulatorStack : public v8::internal::AllStatic { |
542 public: | 541 public: |
543 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, | 542 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, |
544 uintptr_t c_limit) { | 543 uintptr_t c_limit) { |
545 return Simulator::current(isolate)->StackLimit(c_limit); | 544 return Simulator::current(isolate)->StackLimit(c_limit); |
546 } | 545 } |
547 | 546 |
548 static inline uintptr_t RegisterCTryCatch(Isolate* isolate, | 547 static inline uintptr_t RegisterCTryCatch(Isolate* isolate, |
549 uintptr_t try_catch_address) { | 548 uintptr_t try_catch_address) { |
550 Simulator* sim = Simulator::current(isolate); | 549 Simulator* sim = Simulator::current(isolate); |
551 return sim->PushAddress(try_catch_address); | 550 return sim->PushAddress(try_catch_address); |
552 } | 551 } |
553 | 552 |
554 static inline void UnregisterCTryCatch(Isolate* isolate) { | 553 static inline void UnregisterCTryCatch(Isolate* isolate) { |
555 Simulator::current(isolate)->PopAddress(); | 554 Simulator::current(isolate)->PopAddress(); |
556 } | 555 } |
557 }; | 556 }; |
558 | 557 |
559 } // namespace internal | 558 } // namespace internal |
560 } // namespace v8 | 559 } // namespace v8 |
561 | 560 |
562 #endif // !defined(USE_SIMULATOR) | 561 #endif // !defined(USE_SIMULATOR) |
563 #endif // V8_MIPS_SIMULATOR_MIPS_H_ | 562 #endif // V8_MIPS_SIMULATOR_MIPS_H_ |
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