Alexander Markov
7588ed86de
Change-Id: Ief167b7ffc128105a03cc225ab750234c9a6a7a0 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169147 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Régis Crelier <regis@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_X64)
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#include "vm/runtime_entry.h"
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/assembler/assembler.h"
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#include "vm/stub_code.h"
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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namespace dart {
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#define __ assembler->
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uword RuntimeEntry::GetEntryPoint() const {
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return reinterpret_cast<uword>(function());
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}
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#if !defined(DART_PRECOMPILED_RUNTIME)
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// Generate code to call into the stub which will call the runtime
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// function. Input for the stub is as follows:
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// RSP : points to the arguments and return value array.
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// RBX : address of the runtime function to call.
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// R10 : number of arguments to the call.
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void RuntimeEntry::CallInternal(const RuntimeEntry* runtime_entry,
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compiler::Assembler* assembler,
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intptr_t argument_count) {
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if (runtime_entry->is_leaf()) {
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ASSERT(argument_count == runtime_entry->argument_count());
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COMPILE_ASSERT(CallingConventions::kVolatileCpuRegisters & (1 << RAX));
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__ movq(RAX,
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compiler::Address(THR, Thread::OffsetFromThread(runtime_entry)));
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__ movq(compiler::Assembler::VMTagAddress(), RAX);
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__ CallCFunction(RAX);
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__ movq(compiler::Assembler::VMTagAddress(),
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compiler::Immediate(VMTag::kDartTagId));
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ASSERT((CallingConventions::kCalleeSaveCpuRegisters & (1 << THR)) != 0);
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ASSERT((CallingConventions::kCalleeSaveCpuRegisters & (1 << PP)) != 0);
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} else {
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// Argument count is not checked here, but in the runtime entry for a more
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// informative error message.
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__ movq(RBX,
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compiler::Address(THR, Thread::OffsetFromThread(runtime_entry)));
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__ LoadImmediate(R10, compiler::Immediate(argument_count));
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__ CallToRuntime();
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}
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}
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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} // namespace dart
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#endif // defined TARGET_ARCH_X64
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