Samir Jindel
afc54e23e3
For design context and motivation, see go/dart-ffi-callbacks Change-Id: Ie463a462c8676c4a1973f377acee067253aca9f0 Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-simdbc64-try, vm-kernel-linux-release-simdbc64-try, vm-kernel-mac-debug-simdbc64-try, vm-kernel-mac-release-simdbc64-try, vm-kernel-reload-mac-debug-simdbc64-try, vm-kernel-reload-mac-release-simdbc64-try, vm-kernel-linux-debug-ia32-try, vm-dartkb-linux-debug-simarm64-try, vm-kernel-win-debug-ia32-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/101825 Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Aart Bik <ajcbik@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
// Copyright (c) 2014, 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_ARM64_H_
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#define RUNTIME_VM_STACK_FRAME_ARM64_H_
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namespace dart {
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/* ARM64 Dart Frame Layout
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| | <- TOS
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Callee frame | ... |
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| saved PP |
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| code object |
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| saved FP | (FP of current frame)
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| saved PC | (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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static const int kExitLinkSlotFromEntryFp = -22;
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COMPILE_ASSERT(kAbiPreservedCpuRegCount == 10);
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COMPILE_ASSERT(kAbiPreservedFpuRegCount == 8);
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// For FFI native -> Dart callbacks, this is the number of stack slots between
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// arguments 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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constexpr intptr_t kCallbackSlotsBeforeSavedArguments = 2;
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} // namespace dart
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#endif // RUNTIME_VM_STACK_FRAME_ARM64_H_
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