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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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| 24 | 24 |
| 25 // When running without a simulator we call the entry directly. | 25 // When running without a simulator we call the entry directly. |
| 26 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ | 26 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ |
| 27 entry(p0, p1, p2, p3, p4) | 27 entry(p0, p1, p2, p3, p4) |
| 28 | 28 |
| 29 | 29 |
| 30 // Call the generated regexp code directly. The code at the entry address | 30 // Call the generated regexp code directly. The code at the entry address |
| 31 // should act as a function matching the type arm_regexp_matcher. | 31 // should act as a function matching the type arm_regexp_matcher. |
| 32 // The fifth (or ninth) argument is a dummy that reserves the space used for | 32 // The fifth (or ninth) argument is a dummy that reserves the space used for |
| 33 // the return address added by the ExitFrame in native calls. | 33 // the return address added by the ExitFrame in native calls. |
| 34 #ifdef MIPS_ABI_N64 | |
| 35 typedef int (*mips_regexp_matcher)(String* input, | 34 typedef int (*mips_regexp_matcher)(String* input, |
| 36 int64_t start_offset, | 35 int64_t start_offset, |
| 37 const byte* input_start, | 36 const byte* input_start, |
| 38 const byte* input_end, | 37 const byte* input_end, |
| 39 int* output, | 38 int* output, |
| 40 int64_t output_size, | 39 int64_t output_size, |
| 41 Address stack_base, | 40 Address stack_base, |
| 42 int64_t direct_call, | 41 int64_t direct_call, |
| 43 void* return_address, | 42 void* return_address, |
| 44 Isolate* isolate); | 43 Isolate* isolate); |
| 45 | 44 |
| 46 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | 45 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ |
| 47 p7, p8) \ | 46 p7, p8) \ |
| 48 (FUNCTION_CAST<mips_regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, \ | 47 (FUNCTION_CAST<mips_regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, \ |
| 49 NULL, p8)) | 48 NULL, p8)) |
| 50 | 49 |
| 51 #else // O32 Abi. | |
| 52 | |
| 53 typedef int (*mips_regexp_matcher)(String* input, | |
| 54 int32_t start_offset, | |
| 55 const byte* input_start, | |
| 56 const byte* input_end, | |
| 57 void* return_address, | |
| 58 int* output, | |
| 59 int32_t output_size, | |
| 60 Address stack_base, | |
| 61 int32_t direct_call, | |
| 62 Isolate* isolate); | |
| 63 | |
| 64 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | |
| 65 p7, p8) \ | |
| 66 (FUNCTION_CAST<mips_regexp_matcher>(entry)(p0, p1, p2, p3, NULL, p4, p5, p6, \ | |
| 67 p7, p8)) | |
| 68 | |
| 69 #endif // MIPS_ABI_N64 | |
| 70 | |
| 71 | 50 |
| 72 // The stack limit beyond which we will throw stack overflow errors in | 51 // The stack limit beyond which we will throw stack overflow errors in |
| 73 // generated code. Because generated code on mips uses the C stack, we | 52 // generated code. Because generated code on mips uses the C stack, we |
| 74 // just use the C stack limit. | 53 // just use the C stack limit. |
| 75 class SimulatorStack : public v8::internal::AllStatic { | 54 class SimulatorStack : public v8::internal::AllStatic { |
| 76 public: | 55 public: |
| 77 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, | 56 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, |
| 78 uintptr_t c_limit) { | 57 uintptr_t c_limit) { |
| 79 return c_limit; | 58 return c_limit; |
| 80 } | 59 } |
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| 509 | 488 |
| 510 // When running with the simulator transition into simulated execution at this | 489 // When running with the simulator transition into simulated execution at this |
| 511 // point. | 490 // point. |
| 512 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ | 491 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ |
| 513 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ | 492 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ |
| 514 FUNCTION_ADDR(entry), 5, reinterpret_cast<int64_t*>(p0), \ | 493 FUNCTION_ADDR(entry), 5, reinterpret_cast<int64_t*>(p0), \ |
| 515 reinterpret_cast<int64_t*>(p1), reinterpret_cast<int64_t*>(p2), \ | 494 reinterpret_cast<int64_t*>(p1), reinterpret_cast<int64_t*>(p2), \ |
| 516 reinterpret_cast<int64_t*>(p3), reinterpret_cast<int64_t*>(p4))) | 495 reinterpret_cast<int64_t*>(p3), reinterpret_cast<int64_t*>(p4))) |
| 517 | 496 |
| 518 | 497 |
| 519 #ifdef MIPS_ABI_N64 | |
| 520 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | 498 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ |
| 521 p7, p8) \ | 499 p7, p8) \ |
| 522 static_cast<int>(Simulator::current(isolate)->Call( \ | 500 static_cast<int>(Simulator::current(isolate)->Call( \ |
| 523 entry, 10, p0, p1, p2, p3, p4, reinterpret_cast<int64_t*>(p5), p6, p7, \ | 501 entry, 10, p0, p1, p2, p3, p4, reinterpret_cast<int64_t*>(p5), p6, p7, \ |
| 524 NULL, p8)) | 502 NULL, p8)) |
| 525 #else // Must be O32 Abi. | |
| 526 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | |
| 527 p7, p8) \ | |
| 528 static_cast<int>(Simulator::current(isolate)->Call( \ | |
| 529 entry, 10, p0, p1, p2, p3, NULL, p4, p5, p6, p7, p8)) | |
| 530 #endif // MIPS_ABI_N64 | |
| 531 | 503 |
| 532 | 504 |
| 533 // The simulator has its own stack. Thus it has a different stack limit from | 505 // The simulator has its own stack. Thus it has a different stack limit from |
| 534 // the C-based native code. The JS-based limit normally points near the end of | 506 // the C-based native code. The JS-based limit normally points near the end of |
| 535 // the simulator stack. When the C-based limit is exhausted we reflect that by | 507 // the simulator stack. When the C-based limit is exhausted we reflect that by |
| 536 // lowering the JS-based limit as well, to make stack checks trigger. | 508 // lowering the JS-based limit as well, to make stack checks trigger. |
| 537 class SimulatorStack : public v8::internal::AllStatic { | 509 class SimulatorStack : public v8::internal::AllStatic { |
| 538 public: | 510 public: |
| 539 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, | 511 static inline uintptr_t JsLimitFromCLimit(Isolate* isolate, |
| 540 uintptr_t c_limit) { | 512 uintptr_t c_limit) { |
| 541 return Simulator::current(isolate)->StackLimit(c_limit); | 513 return Simulator::current(isolate)->StackLimit(c_limit); |
| 542 } | 514 } |
| 543 | 515 |
| 544 static inline uintptr_t RegisterCTryCatch(Isolate* isolate, | 516 static inline uintptr_t RegisterCTryCatch(Isolate* isolate, |
| 545 uintptr_t try_catch_address) { | 517 uintptr_t try_catch_address) { |
| 546 Simulator* sim = Simulator::current(isolate); | 518 Simulator* sim = Simulator::current(isolate); |
| 547 return sim->PushAddress(try_catch_address); | 519 return sim->PushAddress(try_catch_address); |
| 548 } | 520 } |
| 549 | 521 |
| 550 static inline void UnregisterCTryCatch(Isolate* isolate) { | 522 static inline void UnregisterCTryCatch(Isolate* isolate) { |
| 551 Simulator::current(isolate)->PopAddress(); | 523 Simulator::current(isolate)->PopAddress(); |
| 552 } | 524 } |
| 553 }; | 525 }; |
| 554 | 526 |
| 555 } // namespace internal | 527 } // namespace internal |
| 556 } // namespace v8 | 528 } // namespace v8 |
| 557 | 529 |
| 558 #endif // !defined(USE_SIMULATOR) | 530 #endif // !defined(USE_SIMULATOR) |
| 559 #endif // V8_MIPS_SIMULATOR_MIPS_H_ | 531 #endif // V8_MIPS_SIMULATOR_MIPS_H_ |
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