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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                      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                     bool search_linked_namespaces,
     67                     std::vector<android_namespace_t*>* namespaces = nullptr);
     68 
     69 void solist_add_soinfo(soinfo* si);
     70 bool solist_remove_soinfo(soinfo* si);
     71 soinfo* solist_get_head();
     72 soinfo* solist_get_somain();
     73 soinfo* solist_get_vdso();
     74