webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 120 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/llint/LLIntThunks.cpp b/Source/JavaScriptCore/llint/LLIntThunks.cpp
new file mode 100644
index 000000000..8ab96b304
--- /dev/null
+++ b/Source/JavaScriptCore/llint/LLIntThunks.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "LLIntThunks.h"
+
+#include "CallData.h"
+#include "ExceptionHelpers.h"
+#include "Interpreter.h"
+#include "JSCJSValueInlines.h"
+#include "JSInterfaceJIT.h"
+#include "JSObject.h"
+#include "JSStackInlines.h"
+#include "LLIntCLoop.h"
+#include "LinkBuffer.h"
+#include "LowLevelInterpreter.h"
+#include "ProtoCallFrame.h"
+#include "StackAlignment.h"
+#include "VM.h"
+
+namespace JSC {
+
+#if ENABLE(JIT)
+
+namespace LLInt {
+
+static MacroAssemblerCodeRef generateThunkWithJumpTo(VM* vm, void (*target)(), const char *thunkKind)
+{
+    JSInterfaceJIT jit(vm);
+    
+    // FIXME: there's probably a better way to do it on X86, but I'm not sure I care.
+    jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
+    jit.jump(JSInterfaceJIT::regT0);
+    
+    LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID);
+    return FINALIZE_CODE(patchBuffer, ("LLInt %s prologue thunk", thunkKind));
+}
+
+MacroAssemblerCodeRef functionForCallEntryThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_prologue), "function for call");
+}
+
+MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_prologue), "function for construct");
+}
+
+MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_arity_check), "function for call with arity check");
+}
+
+MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_arity_check), "function for construct with arity check");
+}
+
+MacroAssemblerCodeRef evalEntryThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_eval_prologue), "eval");
+}
+
+MacroAssemblerCodeRef programEntryThunkGenerator(VM* vm)
+{
+    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_program_prologue), "program");
+}
+
+} // namespace LLInt
+
+#else // ENABLE(JIT)
+
+// Non-JIT (i.e. C Loop LLINT) case:
+
+EncodedJSValue vmEntryToJavaScript(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
+{
+    JSValue result = CLoop::execute(llint_vm_entry_to_javascript, executableAddress, vm, protoCallFrame);
+    return JSValue::encode(result);
+}
+
+EncodedJSValue vmEntryToNative(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
+{
+    JSValue result = CLoop::execute(llint_vm_entry_to_native, executableAddress, vm, protoCallFrame);
+    return JSValue::encode(result);
+}
+
+extern "C" VMEntryRecord* vmEntryRecord(VMEntryFrame* entryFrame)
+{
+    // The C Loop doesn't have any callee save registers, so the VMEntryRecord is allocated at the base of the frame.
+    intptr_t stackAlignment = stackAlignmentBytes();
+    intptr_t VMEntryTotalFrameSize = (sizeof(VMEntryRecord) + (stackAlignment - 1)) & ~(stackAlignment - 1);
+    return reinterpret_cast<VMEntryRecord*>(static_cast<char*>(entryFrame) - VMEntryTotalFrameSize);
+}
+
+
+#endif // ENABLE(JIT)
+
+} // namespace JSC