context_arm.h revision 815873ecc312b1d231acce71e1a16f42cdaf09f2 
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 "locks.h"
21#include "arch/context.h"
22#include "base/logging.h"
23#include "registers_arm.h"
24
25namespace art {
26namespace arm {
27
28class ArmContext : public Context {
29 public:
30  ArmContext() {
31    Reset();
32  }
33
34  virtual ~ArmContext() {}
35
36  virtual void Reset();
37
38  virtual void FillCalleeSaves(const StackVisitor& fr) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
39
40  virtual void SetSP(uintptr_t new_sp) {
41    SetGPR(SP, new_sp);
42  }
43
44  virtual void SetPC(uintptr_t new_pc) {
45    SetGPR(PC, new_pc);
46  }
47
48  virtual uintptr_t* GetGPRAddress(uint32_t reg) {
49    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
50    return gprs_[reg];
51  }
52
53  virtual uintptr_t GetGPR(uint32_t reg) {
54    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
55    return *gprs_[reg];
56  }
57
58  virtual void SetGPR(uint32_t reg, uintptr_t value);
59  virtual void SmashCallerSaves();
60  virtual void DoLongJump();
61
62 private:
63  // Pointers to register locations, initialized to NULL or the specific registers below.
64  uintptr_t* gprs_[kNumberOfCoreRegisters];
65  uint32_t* fprs_[kNumberOfSRegisters];
66  // Hold values for sp and pc if they are not located within a stack frame.
67  uintptr_t sp_, pc_;
68};
69
70}  // namespace arm
71}  // namespace art
72
73#endif  // ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_
74