| // 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_ARM_H_ |
| #define RUNTIME_VM_STACK_FRAME_ARM_H_ |
| |
| namespace dart { |
| |
| /* ARM Dart Frame Layout |
| |
| | | <- TOS |
| Callee frame | ... | |
| | saved PP | (PP of current frame) |
| | code object | |
| | saved FP | (FP of current frame) |
| | saved LR | (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 const int kDartFrameFixedSize = 4; // PP, FP, LR, PC marker. |
| static const int kSavedPcSlotFromSp = -1; |
| |
| static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack. |
| static const int kLastFixedObjectSlotFromFp = -2; |
| |
| static const int kFirstLocalSlotFromFp = -3; |
| static const int kSavedCallerPpSlotFromFp = -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; |
| |
| // Entry and exit frame layout. |
| #if defined(TARGET_OS_MACOS) || defined(TARGET_OS_MACOS_IOS) |
| static const int kExitLinkSlotFromEntryFp = -26; |
| COMPILE_ASSERT(kAbiPreservedCpuRegCount == 6); |
| COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4); |
| #else |
| static const int kExitLinkSlotFromEntryFp = -27; |
| COMPILE_ASSERT(kAbiPreservedCpuRegCount == 7); |
| COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4); |
| #endif |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_STACK_FRAME_ARM_H_ |