| // 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 VM_STACK_FRAME_IA32_H_ |
| #define VM_STACK_FRAME_IA32_H_ |
| |
| 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 const int kDartFrameFixedSize = 3; // PC marker, EBP, PC. |
| static const int kSavedPcSlotFromSp = -1; |
| |
| static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack. |
| |
| static const int kFirstLocalSlotFromFp = -2; |
| static const int kPcMarkerSlotFromFp = -1; |
| static const int kSavedCallerFpSlotFromFp = 0; |
| static const int kSavedCallerPcSlotFromFp = 1; |
| static const int kParamEndSlotFromFp = 1; // One slot past last parameter. |
| static const int kCallerSpSlotFromFp = 2; |
| |
| // No pool pointer on IA32 (indicated by aliasing saved fp). |
| static const int kSavedCallerPpSlotFromFp = kSavedCallerFpSlotFromFp; |
| |
| // Entry and exit frame layout. |
| static const int kExitLinkSlotFromEntryFp = -7; |
| |
| } // namespace dart |
| |
| #endif // VM_STACK_FRAME_IA32_H_ |