| 1 | // Copyright (c) 2013, 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 | #ifndef RUNTIME_VM_STACK_FRAME_X64_H_ |
| 6 | #define RUNTIME_VM_STACK_FRAME_X64_H_ |
| 7 | |
| 8 | #if !defined(RUNTIME_VM_STACK_FRAME_H_) |
| 9 | #error Do not include stack_frame_x64.h directly; use stack_frame.h instead. |
| 10 | #endif |
| 11 | |
| 12 | #include "vm/constants.h" |
| 13 | |
| 14 | namespace dart { |
| 15 | |
| 16 | /* X64 Dart Frame Layout |
| 17 | |
| 18 | | | <- TOS |
| 19 | Callee frame | ... | |
| 20 | | saved PP | |
| 21 | | code object | |
| 22 | | saved RBP | (RBP of current frame) |
| 23 | | saved PC | (PC of current frame) |
| 24 | +--------------------+ |
| 25 | Current frame | ... T| <- RSP of current frame |
| 26 | | first local T| |
| 27 | | caller's PP T| |
| 28 | | code object T| (current frame's code object) |
| 29 | | caller's RBP | <- RBP of current frame |
| 30 | | caller's ret addr | (PC of caller frame) |
| 31 | +--------------------+ |
| 32 | Caller frame | last parameter | <- RSP of caller frame |
| 33 | | ... | |
| 34 | |
| 35 | T against a slot indicates it needs to be traversed during GC. |
| 36 | */ |
| 37 | |
| 38 | static constexpr int kDartFrameFixedSize = 4; // PC marker, RBP, PP, PC. |
| 39 | static constexpr int kSavedPcSlotFromSp = -1; |
| 40 | |
| 41 | static constexpr int kFirstObjectSlotFromFp = |
| 42 | -1; // Used by GC to traverse stack. |
| 43 | static constexpr int kLastFixedObjectSlotFromFp = -2; |
| 44 | |
| 45 | static constexpr int kFirstLocalSlotFromFp = -3; |
| 46 | static constexpr int kSavedCallerPpSlotFromFp = -2; |
| 47 | static constexpr int kPcMarkerSlotFromFp = -1; |
| 48 | static constexpr int kSavedCallerFpSlotFromFp = 0; |
| 49 | static constexpr int kSavedCallerPcSlotFromFp = 1; |
| 50 | |
| 51 | static constexpr int kParamEndSlotFromFp = 1; // One slot past last parameter. |
| 52 | static constexpr int kCallerSpSlotFromFp = 2; |
| 53 | static constexpr int kLastParamSlotFromEntrySp = 1; // Skip return address. |
| 54 | |
| 55 | // Entry and exit frame layout. |
| 56 | #if defined(DART_TARGET_OS_WINDOWS) |
| 57 | static constexpr int kExitLinkSlotFromEntryFp = -33; |
| 58 | #else |
| 59 | static constexpr int kExitLinkSlotFromEntryFp = -11; |
| 60 | #endif // defined(DART_TARGET_OS_WINDOWS) |
| 61 | |
| 62 | // For FFI native -> Dart callbacks, the number of stack slots between arguments |
| 63 | // passed on stack and arguments saved in callback prologue. 2 = return address |
| 64 | // (1) + saved frame pointer (1). Also add slots for the shadow space, if |
| 65 | // present. |
| 66 | // |
| 67 | // If NativeCallbackTrampolines::Enabled(), then |
| 68 | // kNativeCallbackTrampolineStackDelta must be added as well. |
| 69 | constexpr intptr_t kCallbackSlotsBeforeSavedArguments = |
| 70 | 2 + CallingConventions::kShadowSpaceBytes / kWordSize; |
| 71 | |
| 72 | // For FFI calls passing in TypedData, we save it on the stack before entering |
| 73 | // a Dart frame. This denotes how to get to the backed up typed data. |
| 74 | static constexpr int kFfiCallerTypedDataSlotFromFp = kCallerSpSlotFromFp; |
| 75 | |
| 76 | } // namespace dart |
| 77 | |
| 78 | #endif // RUNTIME_VM_STACK_FRAME_X64_H_ |
| 79 |
Definitions
- kDartFrameFixedSize
- kSavedPcSlotFromSp
- kFirstObjectSlotFromFp
- kLastFixedObjectSlotFromFp
- kFirstLocalSlotFromFp
- kSavedCallerPpSlotFromFp
- kPcMarkerSlotFromFp
- kSavedCallerFpSlotFromFp
- kSavedCallerPcSlotFromFp
- kParamEndSlotFromFp
- kCallerSpSlotFromFp
- kLastParamSlotFromEntrySp
- kExitLinkSlotFromEntryFp
- kCallbackSlotsBeforeSavedArguments
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