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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_MIPS_H_ | |
6 #define RUNTIME_VM_STACK_FRAME_MIPS_H_ | |
7 | |
8 namespace dart { | |
9 | |
10 /* MIPS Dart Frame Layout | |
11 | |
12 | | <- TOS | |
13 Callee frame | ... | | |
14 | current RA | (PC of current frame) | |
15 | callee's PC marker | | |
16 +--------------------+ | |
17 Current frame | ... T| <- SP of current frame | |
18 | first local T| | |
19 | caller's PP T| | |
20 | CODE_REG T| (current frame's code object) | |
21 | caller's FP | <- FP of current frame | |
22 | caller's RA | (PC of caller frame) | |
23 +--------------------+ | |
24 Caller frame | last parameter | <- SP of caller frame | |
25 | ... | | |
26 | |
27 T against a slot indicates it needs to be traversed during GC. | |
28 */ | |
29 | |
30 static const int kDartFrameFixedSize = 4; // PP, FP, RA, PC marker. | |
31 static const int kSavedPcSlotFromSp = -1; | |
32 | |
33 static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack. | |
34 | |
35 static const int kFirstLocalSlotFromFp = -3; | |
36 static const int kSavedCallerPpSlotFromFp = -2; | |
37 static const int kPcMarkerSlotFromFp = -1; | |
38 static const int kSavedCallerFpSlotFromFp = 0; | |
39 static const int kSavedCallerPcSlotFromFp = 1; | |
40 static const int kParamEndSlotFromFp = 1; // One slot past last parameter. | |
41 static const int kCallerSpSlotFromFp = 2; | |
42 | |
43 // Entry and exit frame layout. | |
44 static const int kExitLinkSlotFromEntryFp = -24; | |
45 COMPILE_ASSERT(kAbiPreservedCpuRegCount == 8); | |
46 COMPILE_ASSERT(kAbiPreservedFpuRegCount == 12); | |
47 | |
48 } // namespace dart | |
49 | |
50 #endif // RUNTIME_VM_STACK_FRAME_MIPS_H_ | |
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