| // Copyright (c) 2014, 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. |
| |
| #ifndef RUNTIME_VM_STACK_FRAME_ARM64_H_ |
| #define RUNTIME_VM_STACK_FRAME_ARM64_H_ |
| |
| #if !defined(RUNTIME_VM_STACK_FRAME_H_) |
| #error Do not include stack_frame_arm64.h directly; use stack_frame.h instead. |
| #endif |
| |
| namespace dart { |
| |
| /* ARM64 Dart Frame Layout |
| | | <- TOS |
| Callee frame | ... | |
| | saved PP | |
| | code object | |
| | saved FP | (FP of current frame) |
| | saved PC | (PC of current frame) |
| +--------------------+ |
| Current frame | ... T| <- SP of current frame |
| | first local T| |
| | caller's PP T| |
| | code object T| (current frame's code object) |
| | caller's FP | <- FP of current frame |
| | caller's LR | (PC of caller frame) |
| +--------------------+ |
| Caller frame | last parameter | <- SP of caller frame |
| | ... | |
| |
| T against a slot indicates it needs to be traversed during GC. |
| */ |
| |
| static constexpr int kDartFrameFixedSize = 4; // PP, FP, LR, PC marker. |
| static constexpr int kSavedPcSlotFromSp = -1; |
| |
| static constexpr int kFirstObjectSlotFromFp = |
| -1; // Used by GC to traverse stack. |
| static constexpr int kLastFixedObjectSlotFromFp = -2; |
| |
| static constexpr int kFirstLocalSlotFromFp = -3; |
| static constexpr int kSavedCallerPpSlotFromFp = -2; |
| static constexpr int kPcMarkerSlotFromFp = -1; |
| static constexpr int kSavedCallerFpSlotFromFp = 0; |
| static constexpr int kSavedCallerPcSlotFromFp = 1; |
| |
| static constexpr int kParamEndSlotFromFp = 1; // One slot past last parameter. |
| static constexpr int kCallerSpSlotFromFp = 2; |
| static constexpr int kLastParamSlotFromEntrySp = 0; |
| |
| // Entry and exit frame layout. |
| #if defined(DART_TARGET_OS_FUCHSIA) |
| static constexpr int kExitLinkSlotFromEntryFp = -24; |
| COMPILE_ASSERT(kAbiPreservedCpuRegCount == 11); |
| #else |
| static constexpr int kExitLinkSlotFromEntryFp = -23; |
| COMPILE_ASSERT(kAbiPreservedCpuRegCount == 10); |
| #endif |
| COMPILE_ASSERT(kAbiPreservedFpuRegCount == 8); |
| |
| // For FFI native -> Dart callbacks, this is the number of stack slots between |
| // arguments passed on stack and arguments saved in callback prologue. |
| // |
| // 2 = return address (1) + saved frame pointer (1). |
| // |
| // If NativeCallbackTrampolines::Enabled(), then |
| // kNativeCallbackTrampolineStackDelta must be added as well. |
| constexpr intptr_t kCallbackSlotsBeforeSavedArguments = 2; |
| |
| // For FFI calls passing in TypedData, we save it on the stack before entering |
| // a Dart frame. This denotes how to get to the backed up typed data. |
| static constexpr int kFfiCallerTypedDataSlotFromFp = kCallerSpSlotFromFp; |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_STACK_FRAME_ARM64_H_ |