context_arm.h revision 8ebd94ab2e0d9867a7d384f00fa4cab24235216f 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_
18#define ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_
19
20#include "arch/context.h"
21#include "base/logging.h"
22#include "registers_arm.h"
23
24namespace art {
25namespace arm {
26
27class ArmContext : public Context {
28 public:
29  ArmContext() {
30    Reset();
31  }
32
33  virtual ~ArmContext() {}
34
35  virtual void Reset();
36
37  virtual void FillCalleeSaves(const StackVisitor& fr) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
38
39  virtual void SetSP(uintptr_t new_sp) {
40    SetGPR(SP, new_sp);
41  }
42
43  virtual void SetPC(uintptr_t new_pc) {
44    SetGPR(PC, new_pc);
45  }
46
47  virtual uintptr_t* GetGPRAddress(uint32_t reg) {
48    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
49    return gprs_[reg];
50  }
51
52  virtual uintptr_t GetGPR(uint32_t reg) {
53    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
54    return *gprs_[reg];
55  }
56
57  virtual void SetGPR(uint32_t reg, uintptr_t value);
58  virtual void SmashCallerSaves();
59  virtual void DoLongJump();
60
61 private:
62  // Pointers to register locations, initialized to NULL or the specific registers below.
63  uintptr_t* gprs_[kNumberOfCoreRegisters];
64  uint32_t* fprs_[kNumberOfSRegisters];
65  // Hold values for sp and pc if they are not located within a stack frame.
66  uintptr_t sp_, pc_;
67};
68
69}  // namespace arm
70}  // namespace art
71
72#endif  // ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_
73