blob: ae4de473aef35998ae913cd058befed00f63e7ef [file] [log] [blame]
// Copyright (c) 2012, 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_IA32)
#include "vm/instructions.h"
#include "vm/isolate.h"
#include "vm/stack_frame.h"
namespace dart {
// The constant kExitLinkOffsetInEntryFrame must be kept in sync with the
// code in the InvokeDartCode stub.
static const int kSavedContextOffsetInEntryFrame = -5 * kWordSize;
static const int kExitLinkOffsetInEntryFrame = -4 * kWordSize;
static const int kPcAddressOffsetFromSp = -1 * kWordSize;
static const int kEntrypointMarkerOffsetFromFp = -1 * kWordSize;
static const int kSpOffsetFromPreviousFp = 2 * kWordSize;
intptr_t StackFrame::PcAddressOffsetFromSp() {
return kPcAddressOffsetFromSp;
}
intptr_t StackFrame::EntrypointMarkerOffsetFromFp() {
return kEntrypointMarkerOffsetFromFp;
}
uword StackFrame::GetCallerSp() const {
return fp() + kSpOffsetFromPreviousFp;
}
uword StackFrame::GetCallerFp() const {
return *(reinterpret_cast<uword*>(fp()));
}
intptr_t EntryFrame::ExitLinkOffset() const {
return kExitLinkOffsetInEntryFrame;
}
intptr_t EntryFrame::SavedContextOffset() const {
return kSavedContextOffsetInEntryFrame;
}
void StackFrameIterator::SetupLastExitFrameData() {
Isolate* current = Isolate::Current();
uword exit_marker = current->top_exit_frame_info();
frames_.fp_ = exit_marker;
}
void StackFrameIterator::SetupNextExitFrameData() {
uword exit_address = entry_.fp() + kExitLinkOffsetInEntryFrame;
uword exit_marker = *reinterpret_cast<uword*>(exit_address);
frames_.fp_ = exit_marker;
frames_.sp_ = 0;
}
} // namespace dart
#endif // defined TARGET_ARCH_IA32