| // Copyright (c) 2013, 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_IA32_H_ |
| #define RUNTIME_VM_STACK_FRAME_IA32_H_ |
| |
| #if !defined(RUNTIME_VM_STACK_FRAME_H_) |
| #error Do not include stack_frame_ia32.h directly; use stack_frame.h instead. |
| #endif |
| |
| namespace dart { |
| |
| /* IA32 Dart Frame Layout |
| |
| | | <- TOS |
| Callee frame | ... | |
| | saved EBP | (EBP of current frame) |
| | saved PC | (PC of current frame) |
| +--------------------+ |
| Current frame | ... T| <- ESP of current frame |
| | first local T| |
| | code object T| (current frame's code object) |
| | caller's EBP | <- EBP of current frame |
| | caller's ret addr | (PC of caller frame) |
| +--------------------+ |
| Caller frame | last parameter | <- ESP of caller frame |
| | ... | |
| |
| T against a slot indicates it needs to be traversed during GC. |
| */ |
| |
| static constexpr int kDartFrameFixedSize = 3; // PC marker, EBP, PC. |
| static constexpr int kSavedPcSlotFromSp = -1; |
| |
| static constexpr int kFirstObjectSlotFromFp = |
| -1; // Used by GC to traverse stack. |
| static constexpr int kLastFixedObjectSlotFromFp = -1; |
| |
| static constexpr int kFirstLocalSlotFromFp = -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 = 1; // Skip return address. |
| |
| // No pool pointer on IA32 (indicated by aliasing saved fp). |
| static constexpr int kSavedCallerPpSlotFromFp = kSavedCallerFpSlotFromFp; |
| |
| // Entry and exit frame layout. |
| static constexpr int kExitLinkSlotFromEntryFp = -8; |
| |
| // All arguments are passed on the stack, so none need to be saved. Therefore |
| // there is no frame for holding the saved arguments. |
| // |
| // If NativeCallbackTrampolines::Enabled(), then |
| // kNativeCallbackTrampolineStackDelta must be added as well. |
| constexpr intptr_t kCallbackSlotsBeforeSavedArguments = 0; |
| |
| // 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_IA32_H_ |