1 /*
2 * Copyright (C) 2015 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 #include "berberis/base/exec_region.h"
18
19 #include <sys/mman.h>
20
21 #include "berberis/base/mmap.h"
22
23 namespace berberis {
24
Write(const uint8_t * dst,const void * src,size_t size)25 void ExecRegion::Write(const uint8_t* dst, const void* src, size_t size) {
26 CHECK_LE(begin(), dst);
27 CHECK_GE(end(), dst + size);
28 CHECK_NE(write_, nullptr);
29 size_t offset = dst - begin();
30 memcpy(write_ + offset, src, size);
31 }
32
Detach()33 void ExecRegion::Detach() {
34 if (write_ != nullptr) {
35 MunmapOrDie(write_, size_);
36 }
37 write_ = nullptr;
38 }
39
Free()40 void ExecRegion::Free() {
41 Detach();
42 MunmapOrDie(exec_, size_);
43 }
44
45 } // namespace berberis
46