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 .
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
// 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_ARM_H_
|
|
#define 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 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.
|
|
static const int kExitLinkSlotFromEntryFp = -27;
|
|
COMPILE_ASSERT(kAbiPreservedCpuRegCount == 7);
|
|
COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4);
|
|
|
|
} // namespace dart
|
|
|
|
#endif // VM_STACK_FRAME_ARM_H_
|