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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/compiler/assembler/assembler.h"
#include "vm/stub_code.h"
#endif // !defined(DART_PRECOMPILED_RUNTIME)
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::CallInternal(const RuntimeEntry* runtime_entry,
compiler::Assembler* assembler,
intptr_t argument_count) {
if (runtime_entry->is_leaf()) {
ASSERT(argument_count == runtime_entry->argument_count());
COMPILE_ASSERT(CallingConventions::kVolatileCpuRegisters & (1 << RAX));
__ movq(RAX,
compiler::Address(THR, Thread::OffsetFromThread(runtime_entry)));
__ movq(compiler::Assembler::VMTagAddress(), RAX);
__ CallCFunction(RAX);
__ movq(compiler::Assembler::VMTagAddress(),
// These registers must be preserved by runtime functions, otherwise
// we'd need to restore them here.
} else {
// Argument count is not checked here, but in the runtime entry for a more
// informative error message.
__ movq(RBX,
compiler::Address(THR, Thread::OffsetFromThread(runtime_entry)));
__ LoadImmediate(R10, compiler::Immediate(argument_count));
__ CallToRuntime();
#endif // !defined(DART_PRECOMPILED_RUNTIME)
} // namespace dart
#endif // defined TARGET_ARCH_X64