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
  36
  37 namespace JSC { namespace LLInt {
  38
  39 #if !ENABLE(LLINT_C_LOOP)
  40
  41 static MacroAssemblerCodeRef generateThunkWithJumpTo(VM* vm, void (*target)(), const char *thunkKind)
  42 {
  43     JSInterfaceJIT jit;
  44
  45     // FIXME: there's probably a better way to do it on X86, but I'm not sure I care.
  46     jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
  47     jit.jump(JSInterfaceJIT::regT0);
  48
  49     LinkBuffer patchBuffer(*vm, &jit, GLOBAL_THUNK_ID);
  50     return FINALIZE_CODE(patchBuffer, ("LLInt %s prologue thunk", thunkKind));
  51 }
  52
  53 MacroAssemblerCodeRef functionForCallEntryThunkGenerator(VM* vm)
  54 {
  55     return generateThunkWithJumpTo(vm, llint_function_for_call_prologue, "function for call");
  56 }
  57
  58 MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(VM* vm)
  59 {
  60     return generateThunkWithJumpTo(vm, llint_function_for_construct_prologue, "function for construct");
  61 }
  62
  63 MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(VM* vm)
  64 {
  65     return generateThunkWithJumpTo(vm, llint_function_for_call_arity_check, "function for call with arity check");
  66 }
  67
  68 MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(VM* vm)
  69 {
  70     return generateThunkWithJumpTo(vm, llint_function_for_construct_arity_check, "function for construct with arity check");
  71 }
  72
  73 MacroAssemblerCodeRef evalEntryThunkGenerator(VM* vm)
  74 {
  75     return generateThunkWithJumpTo(vm, llint_eval_prologue, "eval");
  76 }
  77
  78 MacroAssemblerCodeRef programEntryThunkGenerator(VM* vm)
  79 {
  80     return generateThunkWithJumpTo(vm, llint_program_prologue, "program");
  81 }
  82
  83 #endif // !ENABLE(LLINT_C_LOOP)
  84
  85 } } // namespace JSC::LLInt
  86
  87 #endif // ENABLE(LLINT)