context_mips.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_MIPS_CONTEXT_MIPS_H_
18#define ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
19
20#include "arch/context.h"
21#include "base/logging.h"
22#include "registers_mips.h"
23
24namespace art {
25namespace mips {
26
27class MipsContext : public Context {
28 public:
29  MipsContext() {
30    Reset();
31  }
32  virtual ~MipsContext() {}
33
34  virtual void Reset();
35
36  virtual void FillCalleeSaves(const StackVisitor& fr) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
37
38  virtual void SetSP(uintptr_t new_sp) {
39    SetGPR(SP, new_sp);
40  }
41
42  virtual void SetPC(uintptr_t new_pc) {
43    SetGPR(RA, new_pc);
44  }
45
46  virtual uintptr_t* GetGPRAddress(uint32_t reg) {
47    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
48    return gprs_[reg];
49  }
50
51  virtual uintptr_t GetGPR(uint32_t reg) {
52    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
53    return *gprs_[reg];
54  }
55
56  virtual void SetGPR(uint32_t reg, uintptr_t value);
57  virtual void SmashCallerSaves();
58  virtual void DoLongJump();
59
60 private:
61  // Pointers to registers in the stack, initialized to NULL except for the special cases below.
62  uintptr_t* gprs_[kNumberOfCoreRegisters];
63  uint32_t* fprs_[kNumberOfFRegisters];
64  // Hold values for sp and ra (return address) if they are not located within a stack frame.
65  uintptr_t sp_, ra_;
66};
67}  // namespace mips
68}  // namespace art
69
70#endif  // ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
71