llint/LLIntThunks.cpp

   1 /*
   2  * Copyright (C) 2012 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 #if ENABLE(LLINT)
  30
  31 #include "JSInterfaceJIT.h"
  32 #include "JSObject.h"
  33 #include "LinkBuffer.h"
  34 #include "LowLevelInterpreter.h"
  35 #include "ScopeChain.h"
  36
  37 namespace JSC { namespace LLInt {
  38
  39 static MacroAssemblerCodeRef generateThunkWithJumpTo(JSGlobalData* globalData, void (*target)())
  40 {
  41     JSInterfaceJIT jit;
  42
  43     // FIXME: there's probably a better way to do it on X86, but I'm not sure I care.
  44     jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
  45     jit.jump(JSInterfaceJIT::regT0);
  46
  47     LinkBuffer patchBuffer(*globalData, &jit, GLOBAL_THUNK_ID);
  48     return patchBuffer.finalizeCode();
  49 }
  50
  51 MacroAssemblerCodeRef functionForCallEntryThunkGenerator(JSGlobalData* globalData)
  52 {
  53     return generateThunkWithJumpTo(globalData, llint_function_for_call_prologue);
  54 }
  55
  56 MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(JSGlobalData* globalData)
  57 {
  58     return generateThunkWithJumpTo(globalData, llint_function_for_construct_prologue);
  59 }
  60
  61 MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(JSGlobalData* globalData)
  62 {
  63     return generateThunkWithJumpTo(globalData, llint_function_for_call_arity_check);
  64 }
  65
  66 MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(JSGlobalData* globalData)
  67 {
  68     return generateThunkWithJumpTo(globalData, llint_function_for_construct_arity_check);
  69 }
  70
  71 MacroAssemblerCodeRef evalEntryThunkGenerator(JSGlobalData* globalData)
  72 {
  73     return generateThunkWithJumpTo(globalData, llint_eval_prologue);
  74 }
  75
  76 MacroAssemblerCodeRef programEntryThunkGenerator(JSGlobalData* globalData)
  77 {
  78     return generateThunkWithJumpTo(globalData, llint_program_prologue);
  79 }
  80
  81 } } // namespace JSC::LLInt
  82
  83 #endif // ENABLE(LLINT)