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// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/globals.h"
#if defined(TARGET_ARCH_X64)
#include "vm/runtime_entry.h"
#include "vm/assembler.h"
#include "vm/stub_code.h"
namespace dart {
#define __ assembler->
uword RuntimeEntry::GetEntryPoint() const {
return reinterpret_cast<uword>(function());
// Generate code to call into the stub which will call the runtime
// function. Input for the stub is as follows:
// RSP : points to the arguments and return value array.
// RBX : address of the runtime function to call.
// R10 : number of arguments to the call.
void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
if (is_leaf()) {
ASSERT(argument_count == this->argument_count());
COMPILE_ASSERT(CallingConventions::kVolatileCpuRegisters & (1 << RAX));
__ movq(RAX, Address(THR, Thread::OffsetFromThread(this)));
__ CallCFunction(RAX);
} else {
// Argument count is not checked here, but in the runtime entry for a more
// informative error message.
__ movq(RBX, Address(THR, Thread::OffsetFromThread(this)));
__ movq(R10, Immediate(argument_count));
__ Call(*StubCode::CallToRuntime_entry());
} // namespace dart
#endif // defined TARGET_ARCH_X64