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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 #include "vm/globals.h" | |
| 6 #if defined(TARGET_ARCH_ARM) | |
| 7 | |
| 8 #include "vm/instructions.h" | |
| 9 #include "vm/isolate.h" | |
| 10 #include "vm/stack_frame.h" | |
| 11 | |
| 12 namespace dart { | |
| 13 | |
| 14 // The constant kExitLinkOffsetInEntryFrame must be kept in sync with the | |
| 15 // code in the InvokeDartCode stub. | |
| 16 static const int kSavedContextOffsetInEntryFrame = -10 * kWordSize; | |
| 17 static const int kExitLinkOffsetInEntryFrame = -9 * kWordSize; | |
| 18 static const int kPcAddressOffsetFromSp = -2 * kWordSize; | |
| 19 static const int kEntrypointMarkerOffsetFromFp = 2 * kWordSize; | |
| 20 static const int kSpOffsetFromPreviousFp = 3 * kWordSize; | |
| 21 | |
| 22 | |
| 23 intptr_t StackFrame::PcAddressOffsetFromSp() { | |
| 24 return kPcAddressOffsetFromSp; | |
| 25 } | |
| 26 | |
| 27 | |
| 28 intptr_t StackFrame::EntrypointMarkerOffsetFromFp() { | |
| 29 return kEntrypointMarkerOffsetFromFp; | |
| 30 } | |
| 31 | |
| 32 | |
| 33 uword StackFrame::GetCallerSp() const { | |
| 34 return fp() + kSpOffsetFromPreviousFp; | |
| 35 } | |
| 36 | |
| 37 | |
| 38 uword StackFrame::GetCallerFp() const { | |
| 39 return *(reinterpret_cast<uword*>(fp())); | |
| 40 } | |
| 41 | |
| 42 | |
| 43 intptr_t EntryFrame::ExitLinkOffset() const { | |
| 44 return kExitLinkOffsetInEntryFrame; | |
| 45 } | |
| 46 | |
| 47 | |
| 48 intptr_t EntryFrame::SavedContextOffset() const { | |
| 49 return kSavedContextOffsetInEntryFrame; | |
| 50 } | |
| 51 | |
| 52 | |
| 53 void StackFrameIterator::SetupLastExitFrameData() { | |
| 54 Isolate* current = Isolate::Current(); | |
| 55 uword exit_marker = current->top_exit_frame_info(); | |
| 56 frames_.fp_ = exit_marker; | |
| 57 } | |
| 58 | |
| 59 | |
| 60 void StackFrameIterator::SetupNextExitFrameData() { | |
| 61 uword exit_address = entry_.fp() + kExitLinkOffsetInEntryFrame; | |
| 62 uword exit_marker = *reinterpret_cast<uword*>(exit_address); | |
| 63 frames_.fp_ = exit_marker; | |
| 64 frames_.sp_ = 0; | |
| 65 } | |
| 66 | |
| 67 } // namespace dart | |
| 68 | |
| 69 #endif // defined(TARGET_ARCH_ARM) | |
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