Martin Kustermann
a64b06ec83
Issue https://dart-review.googlesource.com/c/sdk/+/115701 Change-Id: Ib579f0bbc8d694aec74afd837217316a10baf910 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/115707 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
// Copyright (c) 2013, 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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#ifndef RUNTIME_VM_STACK_FRAME_ARM_H_
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#define RUNTIME_VM_STACK_FRAME_ARM_H_
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#if !defined(RUNTIME_VM_STACK_FRAME_H_)
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#error Do not include stack_frame_arm.h directly; use stack_frame.h instead.
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#endif
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namespace dart {
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/* ARM Dart Frame Layout
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| | <- TOS
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Callee frame | ... |
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| saved PP | (PP of current frame)
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| code object |
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| saved FP | (FP of current frame)
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| saved LR | (PC of current frame)
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+--------------------+
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Current frame | ... T| <- SP of current frame
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| first local T|
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| caller's PP T|
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| code object T| (current frame's code object)
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| caller's FP | <- FP of current frame
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| caller's LR | (PC of caller frame)
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+--------------------+
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Caller frame | last parameter | <- SP of caller frame
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| ... |
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T against a slot indicates it needs to be traversed during GC.
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*/
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static const int kDartFrameFixedSize = 4; // PP, FP, LR, PC marker.
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static const int kSavedPcSlotFromSp = -1;
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static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack.
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static const int kLastFixedObjectSlotFromFp = -2;
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static const int kFirstLocalSlotFromFp = -3;
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static const int kSavedCallerPpSlotFromFp = -2;
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static const int kPcMarkerSlotFromFp = -1;
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static const int kSavedCallerFpSlotFromFp = 0;
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static const int kSavedCallerPcSlotFromFp = 1;
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static const int kParamEndSlotFromFp = 1; // One slot past last parameter.
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static const int kCallerSpSlotFromFp = 2;
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static const int kLastParamSlotFromEntrySp = 0;
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// Entry and exit frame layout.
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#if defined(TARGET_OS_MACOS) || defined(TARGET_OS_MACOS_IOS)
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static const int kExitLinkSlotFromEntryFp = -26;
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COMPILE_ASSERT(kAbiPreservedCpuRegCount == 6);
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COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4);
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#else
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static const int kExitLinkSlotFromEntryFp = -27;
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COMPILE_ASSERT(kAbiPreservedCpuRegCount == 7);
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COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4);
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#endif
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// For FFI native -> Dart callbacks, the number of stack slots between arguments
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// passed on stack and arguments saved in callback prologue.
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//
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// 2 = return adddress (1) + saved frame pointer (1).
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//
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// If NativeCallbackTrampolines::Enabled(), then
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// kNativeCallbackTrampolineStackDelta must be added as well.
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constexpr intptr_t kCallbackSlotsBeforeSavedArguments = 2;
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} // namespace dart
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#endif // RUNTIME_VM_STACK_FRAME_ARM_H_
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