Martin Kustermann
3c662736d9
Now that we have a moving GC it's no longer sufficient to rely on callee-saving behavior of PP. This change also ensures that all calls go through RuntimeEntry::Call() . Issue https://github.com/dart-lang/sdk/issues/33274 Change-Id: I159986dc18a9b201175fd4a7064a24a1533790ef Reviewed-on: https://dart-review.googlesource.com/c/88711 Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
50 lines
1.7 KiB
C++
50 lines
1.7 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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#include "vm/compiler/assembler/assembler.h"
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#include "vm/stub_code.h"
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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::Call(Assembler* assembler, intptr_t argument_count) const {
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if (is_leaf()) {
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ASSERT(argument_count == this->argument_count());
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COMPILE_ASSERT(CallingConventions::kVolatileCpuRegisters & (1 << RAX));
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__ movq(RAX, Address(THR, Thread::OffsetFromThread(this)));
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__ movq(Assembler::VMTagAddress(), RAX);
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__ CallCFunction(RAX);
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__ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartCompiledTagId));
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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, Address(THR, Thread::OffsetFromThread(this)));
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__ LoadImmediate(R10, 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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