Ryan Macnak
91bc8005fe
Move SP on ARM64 to x19. Use a mask instead of a range for determining the globally blocked registers. R=regis@google.com Review URL: https://codereview.chromium.org/1417433002 .
51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_STACK_FRAME_MIPS_H_
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#define VM_STACK_FRAME_MIPS_H_
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namespace dart {
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/* MIPS Dart Frame Layout
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| | <- TOS
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Callee frame | ... |
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| current RA | (PC of current frame)
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| callee's PC marker |
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+--------------------+
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Current frame | ... T| <- SP of current frame
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| first local T|
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| caller's PP T|
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| CODE_REG T| (current frame's code object)
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| caller's FP | <- FP of current frame
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| caller's RA | (PC of caller frame)
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+--------------------+
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Caller frame | last parameter | <- SP of caller frame
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| ... |
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T against a slot indicates it needs to be traversed during GC.
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*/
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static const int kDartFrameFixedSize = 4; // PP, FP, RA, PC marker.
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static const int kSavedPcSlotFromSp = -1;
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static const int kFirstObjectSlotFromFp = -1; // Used by GC to traverse stack.
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static const int kFirstLocalSlotFromFp = -3;
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static const int kSavedCallerPpSlotFromFp = -2;
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static const int kPcMarkerSlotFromFp = -1;
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static const int kSavedCallerFpSlotFromFp = 0;
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static const int kSavedCallerPcSlotFromFp = 1;
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static const int kParamEndSlotFromFp = 1; // One slot past last parameter.
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static const int kCallerSpSlotFromFp = 2;
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// Entry and exit frame layout.
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static const int kExitLinkSlotFromEntryFp = -24;
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COMPILE_ASSERT(kAbiPreservedCpuRegCount == 8);
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COMPILE_ASSERT(kAbiPreservedFpuRegCount == 12);
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} // namespace dart
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#endif // VM_STACK_FRAME_MIPS_H_
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