llint/LLIntThunks.cpp

   1 /*
   2  * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "LLIntThunks.h"
  28
  29 #include "CallData.h"
  30 #include "ExceptionHelpers.h"
  31 #include "Interpreter.h"
  32 #include "JSCJSValueInlines.h"
  33 #include "JSInterfaceJIT.h"
  34 #include "JSObject.h"
  35 #include "JSStackInlines.h"
  36 #include "LLIntCLoop.h"
  37 #include "LinkBuffer.h"
  38 #include "LowLevelInterpreter.h"
  39 #include "ProtoCallFrame.h"
  40 #include "VM.h"
  41
  42 namespace JSC {
  43
  44 #if ENABLE(JIT)
  45
  46 namespace LLInt {
  47
  48 static MacroAssemblerCodeRef generateThunkWithJumpTo(VM* vm, void (*target)(), const char *thunkKind)
  49 {
  50     JSInterfaceJIT jit(vm);
  51
  52     // FIXME: there's probably a better way to do it on X86, but I'm not sure I care.
  53     jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
  54     jit.jump(JSInterfaceJIT::regT0);
  55
  56     LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID);
  57     return FINALIZE_CODE(patchBuffer, ("LLInt %s prologue thunk", thunkKind));
  58 }
  59
  60 MacroAssemblerCodeRef functionForCallEntryThunkGenerator(VM* vm)
  61 {
  62     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_prologue), "function for call");
  63 }
  64
  65 MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(VM* vm)
  66 {
  67     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_prologue), "function for construct");
  68 }
  69
  70 MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(VM* vm)
  71 {
  72     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_arity_check), "function for call with arity check");
  73 }
  74
  75 MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(VM* vm)
  76 {
  77     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_arity_check), "function for construct with arity check");
  78 }
  79
  80 MacroAssemblerCodeRef evalEntryThunkGenerator(VM* vm)
  81 {
  82     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_eval_prologue), "eval");
  83 }
  84
  85 MacroAssemblerCodeRef programEntryThunkGenerator(VM* vm)
  86 {
  87     return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_program_prologue), "program");
  88 }
  89
  90 } // namespace LLInt
  91
  92 #else // ENABLE(JIT)
  93
  94 // Non-JIT (i.e. C Loop LLINT) case:
  95
  96 EncodedJSValue callToJavaScript(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
  97 {
  98     JSValue result = CLoop::execute(llint_call_to_javascript, executableAddress, vm, protoCallFrame);
  99     return JSValue::encode(result);
 100 }
 101
 102 EncodedJSValue callToNativeFunction(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
 103 {
 104     JSValue result = CLoop::execute(llint_call_to_native_function, executableAddress, vm, protoCallFrame);
 105     return JSValue::encode(result);
 106 }
 107
 108 #endif // ENABLE(JIT)
 109
 110 } // namespace JSC