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| 1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 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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| 47 // the address of "this" to get a value on the current execution stack and then | 47 // the address of "this" to get a value on the current execution stack and then | 
| 48 // calculates the stack limit based on that value. | 48 // calculates the stack limit based on that value. | 
| 49 #define GENERATED_CODE_STACK_LIMIT(limit) \ | 49 #define GENERATED_CODE_STACK_LIMIT(limit) \ | 
| 50   (reinterpret_cast<uintptr_t>(this) - limit) | 50   (reinterpret_cast<uintptr_t>(this) - limit) | 
| 51 | 51 | 
| 52 #else  // defined(__arm__) | 52 #else  // defined(__arm__) | 
| 53 | 53 | 
| 54 // When running with the simulator transition into simulated execution at this | 54 // When running with the simulator transition into simulated execution at this | 
| 55 // point. | 55 // point. | 
| 56 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \ | 56 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \ | 
| 57   assembler::arm::Simulator::current()->call((int32_t)entry, (int32_t)p0, \ | 57   assembler::arm::Simulator::current()->Call((int32_t)entry, (int32_t)p0, \ | 
| 58     (int32_t)p1, (int32_t)p2, (int32_t)p3, (int32_t)p4) | 58     (int32_t)p1, (int32_t)p2, (int32_t)p3, (int32_t)p4) | 
| 59 | 59 | 
| 60 // The simulator has its own stack. Thus it has a different stack limit from | 60 // The simulator has its own stack. Thus it has a different stack limit from | 
| 61 // the C-based native code. | 61 // the C-based native code. | 
| 62 #define GENERATED_CODE_STACK_LIMIT(limit) \ | 62 #define GENERATED_CODE_STACK_LIMIT(limit) \ | 
| 63   (assembler::arm::Simulator::current()->StackLimit()) | 63   (assembler::arm::Simulator::current()->StackLimit()) | 
| 64 | 64 | 
| 65 | 65 | 
| 66 #include "constants-arm.h" | 66 #include "constants-arm.h" | 
| 67 | 67 | 
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| 96   int32_t get_register(int reg) const; | 96   int32_t get_register(int reg) const; | 
| 97 | 97 | 
| 98   // Special case of set_register and get_register to access the raw PC value. | 98   // Special case of set_register and get_register to access the raw PC value. | 
| 99   void set_pc(int32_t value); | 99   void set_pc(int32_t value); | 
| 100   int32_t get_pc() const; | 100   int32_t get_pc() const; | 
| 101 | 101 | 
| 102   // Accessor to the internal simulator stack area. | 102   // Accessor to the internal simulator stack area. | 
| 103   uintptr_t StackLimit() const; | 103   uintptr_t StackLimit() const; | 
| 104 | 104 | 
| 105   // Executes ARM instructions until the PC reaches end_sim_pc. | 105   // Executes ARM instructions until the PC reaches end_sim_pc. | 
| 106   void execute(); | 106   void Execute(); | 
| 107 | 107 | 
| 108   // V8 generally calls into generated code with 5 parameters. This is a | 108   // V8 generally calls into generated code with 5 parameters. This is a | 
| 109   // convenience funtion, which sets up the simulator state and grabs the | 109   // convenience funtion, which sets up the simulator state and grabs the | 
| 110   // result on return. | 110   // result on return. | 
| 111   v8::internal::Object* call(int32_t entry, int32_t p0, int32_t p1, | 111   v8::internal::Object* Call(int32_t entry, int32_t p0, int32_t p1, | 
| 112                              int32_t p2, int32_t p3, int32_t p4); | 112                              int32_t p2, int32_t p3, int32_t p4); | 
| 113 | 113 | 
| 114  private: | 114  private: | 
| 115   enum special_values { | 115   enum special_values { | 
| 116     // Known bad pc value to ensure that the simulator does not execute | 116     // Known bad pc value to ensure that the simulator does not execute | 
| 117     // without being properly setup. | 117     // without being properly setup. | 
| 118     bad_lr = -1, | 118     bad_lr = -1, | 
| 119     // A pc value used to signal the simulator to stop execution.  Generally | 119     // A pc value used to signal the simulator to stop execution.  Generally | 
| 120     // the lr is set to this value on transition from native C code to | 120     // the lr is set to this value on transition from native C code to | 
| 121     // simulated execution, so that the simulator can "return" to the native | 121     // simulated execution, so that the simulator can "return" to the native | 
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| 189   // registered breakpoints | 189   // registered breakpoints | 
| 190   Instr* break_pc_; | 190   Instr* break_pc_; | 
| 191   instr_t break_instr_; | 191   instr_t break_instr_; | 
| 192 }; | 192 }; | 
| 193 | 193 | 
| 194 } }  // namespace assembler::arm | 194 } }  // namespace assembler::arm | 
| 195 | 195 | 
| 196 #endif  // defined(__arm__) | 196 #endif  // defined(__arm__) | 
| 197 | 197 | 
| 198 #endif  // V8_SIMULATOR_ARM_H_ | 198 #endif  // V8_SIMULATOR_ARM_H_ | 
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