mirror of
https://github.com/dart-lang/sdk
synced 2024-11-02 06:20:13 +00:00
2bfecc160b
TEST=build Change-Id: I2dd8ae69764af27f480a19995b491e98f52476ae Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/293902 Reviewed-by: Liam Appelbe <liama@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
83 lines
3.2 KiB
C++
83 lines
3.2 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 RUNTIME_VM_STACK_FRAME_ARM_H_
|
|
#define RUNTIME_VM_STACK_FRAME_ARM_H_
|
|
|
|
#if !defined(RUNTIME_VM_STACK_FRAME_H_)
|
|
#error Do not include stack_frame_arm.h directly; use stack_frame.h instead.
|
|
#endif
|
|
|
|
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 constexpr int kDartFrameFixedSize = 4; // PP, FP, LR, PC marker.
|
|
static constexpr int kSavedPcSlotFromSp = -1;
|
|
|
|
static constexpr int kFirstObjectSlotFromFp =
|
|
-1; // Used by GC to traverse stack.
|
|
static constexpr int kLastFixedObjectSlotFromFp = -2;
|
|
|
|
static constexpr int kFirstLocalSlotFromFp = -3;
|
|
static constexpr int kSavedCallerPpSlotFromFp = -2;
|
|
static constexpr int kPcMarkerSlotFromFp = -1;
|
|
static constexpr int kSavedCallerFpSlotFromFp = 0;
|
|
static constexpr int kSavedCallerPcSlotFromFp = 1;
|
|
static constexpr int kParamEndSlotFromFp = 1; // One slot past last parameter.
|
|
static constexpr int kCallerSpSlotFromFp = 2;
|
|
static constexpr int kLastParamSlotFromEntrySp = 0;
|
|
|
|
// Entry and exit frame layout.
|
|
#if defined(DART_TARGET_OS_MACOS) || defined(DART_TARGET_OS_MACOS_IOS)
|
|
static constexpr int kExitLinkSlotFromEntryFp = -27;
|
|
COMPILE_ASSERT(kAbiPreservedCpuRegCount == 6);
|
|
COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4);
|
|
#else
|
|
static constexpr int kExitLinkSlotFromEntryFp = -28;
|
|
COMPILE_ASSERT(kAbiPreservedCpuRegCount == 7);
|
|
COMPILE_ASSERT(kAbiPreservedFpuRegCount == 4);
|
|
#endif
|
|
|
|
// For FFI native -> Dart callbacks, the number of stack slots between arguments
|
|
// passed on stack and arguments saved in callback prologue.
|
|
//
|
|
// 2 = return address (1) + saved frame pointer (1).
|
|
//
|
|
// If NativeCallbackTrampolines::Enabled(), then
|
|
// kNativeCallbackTrampolineStackDelta must be added as well.
|
|
constexpr intptr_t kCallbackSlotsBeforeSavedArguments = 2;
|
|
|
|
// For FFI calls passing in TypedData, we save it on the stack before entering
|
|
// a Dart frame. This denotes how to get to the backed up typed data.
|
|
//
|
|
// Note: This is not kCallerSpSlotFromFp on arm.
|
|
//
|
|
// [fp] holds callers fp, [fp+4] holds callers lr, [fp+8] is space for
|
|
// return address, [fp+12] is our pushed TypedData pointer.
|
|
static constexpr int kFfiCallerTypedDataSlotFromFp = kCallerSpSlotFromFp + 1;
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_STACK_FRAME_ARM_H_
|