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1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #pragma once
30 
31 #include <android/dlext.h>
32 
33 #include <unordered_map>
34 #include <vector>
35 
36 #include "linker_namespaces.h"
37 #include "linker_soinfo.h"
38 
39 class ProtectedDataGuard {
40  public:
41   ProtectedDataGuard();
42   ~ProtectedDataGuard();
43 
44  private:
45   void protect_data(int protection);
46   static size_t ref_count_;
47 };
48 
49 class ElfReader;
50 
51 std::vector<android_namespace_t*> init_default_namespaces(const char* executable_path);
52 soinfo* soinfo_alloc(android_namespace_t* ns, const char* name,
53                      const struct stat* file_stat, off64_t file_offset,
54                      uint32_t rtld_flags);
55 
56 bool find_libraries(android_namespace_t* ns,
57                     soinfo* start_with,
58                     const char* const library_names[],
59                     size_t library_names_count,
60                     soinfo* soinfos[],
61                     std::vector<soinfo*>* ld_preloads,
62                     size_t ld_preloads_count,
63                     int rtld_flags,
64                     const android_dlextinfo* extinfo,
65                     bool add_as_children,
66                     std::vector<android_namespace_t*>* namespaces = nullptr);
67 
68 void solist_add_soinfo(soinfo* si);
69 bool solist_remove_soinfo(soinfo* si);
70 soinfo* solist_get_head();
71 soinfo* solist_get_somain();
72 soinfo* solist_get_vdso();
73