1 /*
2 * Copyright (C) 2007 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 <dlfcn.h>
18 #include <link.h>
19 #include <stdlib.h>
20 #include <android/dlext.h>
21
22 // These functions are exported by the loader
23 // TODO(dimitry): replace these with reference to libc.so
24
25 extern "C" {
26
27 __attribute__((__weak__, visibility("default")))
28 void __loader_android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size);
29
30 __attribute__((__weak__, visibility("default")))
31 void __loader_android_update_LD_LIBRARY_PATH(const char* ld_library_path);
32
33 __attribute__((__weak__, visibility("default")))
34 void __loader_android_set_application_target_sdk_version(int target);
35
36 __attribute__((__weak__, visibility("default")))
37 bool __loader_android_init_anonymous_namespace(const char* shared_libs_sonames,
38 const char* library_search_path);
39
40 __attribute__((__weak__, visibility("default")))
41 struct android_namespace_t* __loader_android_create_namespace(
42 const char* name,
43 const char* ld_library_path,
44 const char* default_library_path,
45 uint64_t type,
46 const char* permitted_when_isolated_path,
47 struct android_namespace_t* parent,
48 const void* caller_addr);
49
50 __attribute__((__weak__, visibility("default")))
51 bool __loader_android_link_namespaces(
52 struct android_namespace_t* namespace_from,
53 struct android_namespace_t* namespace_to,
54 const char* shared_libs_sonames);
55
56 __attribute__((__weak__, visibility("default")))
57 void __loader_android_dlwarning(void* obj, void (*f)(void*, const char*));
58
59 __attribute__((__weak__, visibility("default")))
60 struct android_namespace_t* __loader_android_get_exported_namespace(const char* name);
61
62 __attribute__((__weak__, visibility("default"))) void __loader_android_set_16kb_appcompat_mode(
63 bool enable_app_compat);
64
65 // Proxy calls to bionic loader
66 __attribute__((__weak__))
android_get_LD_LIBRARY_PATH(char * buffer,size_t buffer_size)67 void android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size) {
68 __loader_android_get_LD_LIBRARY_PATH(buffer, buffer_size);
69 }
70
71 __attribute__((__weak__))
android_update_LD_LIBRARY_PATH(const char * ld_library_path)72 void android_update_LD_LIBRARY_PATH(const char* ld_library_path) {
73 __loader_android_update_LD_LIBRARY_PATH(ld_library_path);
74 }
75
76 __attribute__((__weak__))
android_set_application_target_sdk_version(int target)77 void android_set_application_target_sdk_version(int target) {
78 __loader_android_set_application_target_sdk_version(target);
79 }
80
81 __attribute__((__weak__))
android_init_anonymous_namespace(const char * shared_libs_sonames,const char * library_search_path)82 bool android_init_anonymous_namespace(const char* shared_libs_sonames,
83 const char* library_search_path) {
84 return __loader_android_init_anonymous_namespace(shared_libs_sonames, library_search_path);
85 }
86
87 __attribute__((__weak__))
android_create_namespace(const char * name,const char * ld_library_path,const char * default_library_path,uint64_t type,const char * permitted_when_isolated_path,struct android_namespace_t * parent)88 struct android_namespace_t* android_create_namespace(const char* name,
89 const char* ld_library_path,
90 const char* default_library_path,
91 uint64_t type,
92 const char* permitted_when_isolated_path,
93 struct android_namespace_t* parent) {
94 const void* caller_addr = __builtin_return_address(0);
95 return __loader_android_create_namespace(name,
96 ld_library_path,
97 default_library_path,
98 type,
99 permitted_when_isolated_path,
100 parent,
101 caller_addr);
102 }
103
104 __attribute__((__weak__))
android_link_namespaces(struct android_namespace_t * namespace_from,struct android_namespace_t * namespace_to,const char * shared_libs_sonames)105 bool android_link_namespaces(struct android_namespace_t* namespace_from,
106 struct android_namespace_t* namespace_to,
107 const char* shared_libs_sonames) {
108 return __loader_android_link_namespaces(namespace_from, namespace_to, shared_libs_sonames);
109 }
110
111 __attribute__((__weak__))
android_dlwarning(void * obj,void (* f)(void *,const char *))112 void android_dlwarning(void* obj, void (*f)(void*, const char*)) {
113 __loader_android_dlwarning(obj, f);
114 }
115
116 __attribute__((__weak__))
android_get_exported_namespace(const char * name)117 struct android_namespace_t* android_get_exported_namespace(const char* name) {
118 return __loader_android_get_exported_namespace(name);
119 }
120
android_set_16kb_appcompat_mode(bool enable_app_compat)121 __attribute__((__weak__)) void android_set_16kb_appcompat_mode(bool enable_app_compat) {
122 __loader_android_set_16kb_appcompat_mode(enable_app_compat);
123 }
124
125 } // extern "C"
126