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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 // 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 ARM instructions if we are not generating a native | 6 // Declares a Simulator for ARM instructions if we are not generating a native |
| 7 // ARM binary. This Simulator allows us to run and debug ARM code generation on | 7 // ARM binary. This Simulator allows us to run and debug ARM code generation on |
| 8 // regular desktop machines. | 8 // 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 |
| 11 // on a ARM HW platform. | 11 // on a ARM HW platform. |
| 12 | 12 |
| 13 #ifndef V8_ARM_SIMULATOR_ARM_H_ | 13 #ifndef V8_ARM_SIMULATOR_ARM_H_ |
| 14 #define V8_ARM_SIMULATOR_ARM_H_ | 14 #define V8_ARM_SIMULATOR_ARM_H_ |
| 15 | 15 |
| 16 #include "src/allocation.h" | 16 #include "src/allocation.h" |
| 17 #include "src/base/lazy-instance.h" | 17 #include "src/base/lazy-instance.h" |
| 18 #include "src/base/platform/mutex.h" | 18 #include "src/base/platform/mutex.h" |
| 19 | 19 |
| 20 #if !defined(USE_SIMULATOR) | 20 #if !defined(USE_SIMULATOR) |
| 21 // Running without a simulator on a native arm platform. | 21 // Running without a simulator on a native arm platform. |
| 22 | 22 |
| 23 namespace v8 { | 23 namespace v8 { |
| 24 namespace internal { | 24 namespace internal { |
| 25 | 25 |
| 26 // When running without a simulator we call the entry directly. | 26 // When running without a simulator we call the entry directly. |
| 27 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ | 27 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ |
| 28 (entry(p0, p1, p2, p3, p4)) | 28 (entry(p0, p1, p2, p3, p4)) |
| 29 | 29 |
| 30 typedef int (*arm_regexp_matcher)(String*, int, const byte*, const byte*, | 30 typedef int (*arm_regexp_matcher)(String*, int, const byte*, const byte*, int*, |
| 31 void*, int*, int, Address, int, Isolate*); | 31 int, Address, int, Isolate*); |
| 32 | |
| 33 | 32 |
| 34 // 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 |
| 35 // should act as a function matching the type arm_regexp_matcher. | 34 // should act as a function matching the type arm_regexp_matcher. |
| 36 // 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 |
| 37 // the return address added by the ExitFrame in native calls. | 36 // the return address added by the ExitFrame in native calls. |
| 38 #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, \ |
| 39 p7, p8) \ | 38 p7, p8) \ |
| 40 (FUNCTION_CAST<arm_regexp_matcher>(entry)(p0, p1, p2, p3, NULL, p4, p5, p6, \ | 39 (FUNCTION_CAST<arm_regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, p8)) |
| 41 p7, p8)) | |
| 42 | 40 |
| 43 // The stack limit beyond which we will throw stack overflow errors in | 41 // The stack limit beyond which we will throw stack overflow errors in |
| 44 // generated code. Because generated code on arm uses the C stack, we | 42 // generated code. Because generated code on arm uses the C stack, we |
| 45 // just use the C stack limit. | 43 // just use the C stack limit. |
| 46 class SimulatorStack : public v8::internal::AllStatic { | 44 class SimulatorStack : public v8::internal::AllStatic { |
| 47 public: | 45 public: |
| 48 static inline uintptr_t JsLimitFromCLimit(v8::internal::Isolate* isolate, | 46 static inline uintptr_t JsLimitFromCLimit(v8::internal::Isolate* isolate, |
| 49 uintptr_t c_limit) { | 47 uintptr_t c_limit) { |
| 50 USE(isolate); | 48 USE(isolate); |
| 51 return c_limit; | 49 return c_limit; |
| (...skipping 490 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 542 // point. | 540 // point. |
| 543 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ | 541 #define CALL_GENERATED_CODE(isolate, entry, p0, p1, p2, p3, p4) \ |
| 544 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ | 542 reinterpret_cast<Object*>(Simulator::current(isolate)->Call( \ |
| 545 FUNCTION_ADDR(entry), 5, p0, p1, p2, p3, p4)) | 543 FUNCTION_ADDR(entry), 5, p0, p1, p2, p3, p4)) |
| 546 | 544 |
| 547 #define CALL_GENERATED_FP_INT(isolate, entry, p0, p1) \ | 545 #define CALL_GENERATED_FP_INT(isolate, entry, p0, p1) \ |
| 548 Simulator::current(isolate)->CallFPReturnsInt(FUNCTION_ADDR(entry), p0, p1) | 546 Simulator::current(isolate)->CallFPReturnsInt(FUNCTION_ADDR(entry), p0, p1) |
| 549 | 547 |
| 550 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ | 548 #define CALL_GENERATED_REGEXP_CODE(isolate, entry, p0, p1, p2, p3, p4, p5, p6, \ |
| 551 p7, p8) \ | 549 p7, p8) \ |
| 552 Simulator::current(isolate) \ | 550 Simulator::current(isolate)->Call(entry, 10, p0, p1, p2, p3, p4, p5, p6, p7, \ |
| 553 ->Call(entry, 10, p0, p1, p2, p3, NULL, p4, p5, p6, p7, p8) | 551 p8) |
| 554 | |
| 555 | 552 |
| 556 // The simulator has its own stack. Thus it has a different stack limit from | 553 // The simulator has its own stack. Thus it has a different stack limit from |
| 557 // the C-based native code. The JS-based limit normally points near the end of | 554 // the C-based native code. The JS-based limit normally points near the end of |
| 558 // the simulator stack. When the C-based limit is exhausted we reflect that by | 555 // the simulator stack. When the C-based limit is exhausted we reflect that by |
| 559 // lowering the JS-based limit as well, to make stack checks trigger. | 556 // lowering the JS-based limit as well, to make stack checks trigger. |
| 560 class SimulatorStack : public v8::internal::AllStatic { | 557 class SimulatorStack : public v8::internal::AllStatic { |
| 561 public: | 558 public: |
| 562 static inline uintptr_t JsLimitFromCLimit(v8::internal::Isolate* isolate, | 559 static inline uintptr_t JsLimitFromCLimit(v8::internal::Isolate* isolate, |
| 563 uintptr_t c_limit) { | 560 uintptr_t c_limit) { |
| 564 return Simulator::current(isolate)->StackLimit(c_limit); | 561 return Simulator::current(isolate)->StackLimit(c_limit); |
| 565 } | 562 } |
| 566 | 563 |
| 567 static inline uintptr_t RegisterCTryCatch(v8::internal::Isolate* isolate, | 564 static inline uintptr_t RegisterCTryCatch(v8::internal::Isolate* isolate, |
| 568 uintptr_t try_catch_address) { | 565 uintptr_t try_catch_address) { |
| 569 Simulator* sim = Simulator::current(isolate); | 566 Simulator* sim = Simulator::current(isolate); |
| 570 return sim->PushAddress(try_catch_address); | 567 return sim->PushAddress(try_catch_address); |
| 571 } | 568 } |
| 572 | 569 |
| 573 static inline void UnregisterCTryCatch(v8::internal::Isolate* isolate) { | 570 static inline void UnregisterCTryCatch(v8::internal::Isolate* isolate) { |
| 574 Simulator::current(isolate)->PopAddress(); | 571 Simulator::current(isolate)->PopAddress(); |
| 575 } | 572 } |
| 576 }; | 573 }; |
| 577 | 574 |
| 578 } // namespace internal | 575 } // namespace internal |
| 579 } // namespace v8 | 576 } // namespace v8 |
| 580 | 577 |
| 581 #endif // !defined(USE_SIMULATOR) | 578 #endif // !defined(USE_SIMULATOR) |
| 582 #endif // V8_ARM_SIMULATOR_ARM_H_ | 579 #endif // V8_ARM_SIMULATOR_ARM_H_ |
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