upload android base code part3

android/bionic/libdl/libdl.c

@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dlfcn.h>
+#include <link.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <android/dlext.h>
+
+// These functions are exported by the loader
+// TODO(dimitry): replace these with reference to libc.so
+
+__attribute__((__weak__, visibility("default")))
+void* __loader_dlopen(const char* filename, int flags, const void* caller_addr);
+
+__attribute__((__weak__, visibility("default")))
+void* __loader_dlerror();
+
+__attribute__((__weak__, visibility("default")))
+void* __loader_dlsym(void* handle, const char* symbol, const void* caller_addr);
+
+__attribute__((__weak__, visibility("default")))
+void* __loader_dlvsym(void* handle,
+                      const char* symbol,
+                      const char* version,
+                      const void* caller_addr);
+
+__attribute__((__weak__, visibility("default")))
+int __loader_dladdr(const void* addr, Dl_info* info);
+
+__attribute__((__weak__, visibility("default")))
+int __loader_dlclose(void* handle);
+
+#if defined(__arm__)
+__attribute__((__weak__, visibility("default")))
+_Unwind_Ptr __loader_dl_unwind_find_exidx(_Unwind_Ptr pc, int* pcount);
+#endif
+
+__attribute__((__weak__, visibility("default")))
+int __loader_dl_iterate_phdr(int (*cb)(struct dl_phdr_info* info, size_t size, void* data),
+                             void* data);
+
+__attribute__((__weak__, visibility("default")))
+void __loader_android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size);
+
+__attribute__((__weak__, visibility("default")))
+void __loader_android_update_LD_LIBRARY_PATH(const char* ld_library_path);
+
+__attribute__((__weak__, visibility("default")))
+void* __loader_android_dlopen_ext(const char* filename,
+                                  int flag,
+                                  const android_dlextinfo* extinfo,
+                                  const void* caller_addr);
+
+__attribute__((__weak__, visibility("default")))
+void __loader_android_set_application_target_sdk_version(uint32_t target);
+
+__attribute__((__weak__, visibility("default")))
+uint32_t __loader_android_get_application_target_sdk_version();
+
+__attribute__((__weak__, visibility("default")))
+bool __loader_android_init_anonymous_namespace(const char* shared_libs_sonames,
+                                               const char* library_search_path);
+
+__attribute__((__weak__, visibility("default")))
+struct android_namespace_t* __loader_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,
+                                const void* caller_addr);
+
+__attribute__((__weak__, visibility("default")))
+bool __loader_android_link_namespaces(
+                                struct android_namespace_t* namespace_from,
+                                struct android_namespace_t* namespace_to,
+                                const char* shared_libs_sonames);
+
+__attribute__((__weak__, visibility("default")))
+void __loader_android_dlwarning(void* obj, void (*f)(void*, const char*));
+
+__attribute__((__weak__, visibility("default")))
+struct android_namespace_t* __loader_android_get_exported_namespace(const char* name);
+
+// Proxy calls to bionic loader
+void* dlopen(const char* filename, int flag) {
+  const void* caller_addr = __builtin_return_address(0);
+  return __loader_dlopen(filename, flag, caller_addr);
+}
+
+char* dlerror() {
+  return __loader_dlerror();
+}
+
+void* dlsym(void* handle, const char* symbol) {
+  const void* caller_addr = __builtin_return_address(0);
+  return __loader_dlsym(handle, symbol, caller_addr);
+}
+
+void* dlvsym(void* handle, const char* symbol, const char* version) {
+  const void* caller_addr = __builtin_return_address(0);
+  return __loader_dlvsym(handle, symbol, version, caller_addr);
+}
+
+int dladdr(const void* addr, Dl_info* info) {
+  return __loader_dladdr(addr, info);
+}
+
+int dlclose(void* handle) {
+  return __loader_dlclose(handle);
+}
+
+#if defined(__arm__)
+_Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr pc, int* pcount) {
+  return __loader_dl_unwind_find_exidx(pc, pcount);
+}
+#endif
+
+/*
+ * This needs to be defined as weak because it is also defined in libc.a.
+ * Without this, static executables will have a multiple definition error.
+ */
+__attribute__((__weak__))
+int dl_iterate_phdr(int (*cb)(struct dl_phdr_info* info, size_t size, void* data), void* data) {
+  return __loader_dl_iterate_phdr(cb, data);
+}
+
+void android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size) {
+  __loader_android_get_LD_LIBRARY_PATH(buffer, buffer_size);
+}
+
+void android_update_LD_LIBRARY_PATH(const char* ld_library_path) {
+  __loader_android_update_LD_LIBRARY_PATH(ld_library_path);
+}
+
+void* android_dlopen_ext(const char* filename, int flag, const android_dlextinfo* extinfo) {
+  const void* caller_addr = __builtin_return_address(0);
+  return __loader_android_dlopen_ext(filename, flag, extinfo, caller_addr);
+}
+
+void android_set_application_target_sdk_version(uint32_t target) {
+  __loader_android_set_application_target_sdk_version(target);
+}
+uint32_t android_get_application_target_sdk_version() {
+  return __loader_android_get_application_target_sdk_version();
+}
+
+bool android_init_anonymous_namespace(const char* shared_libs_sonames,
+                                      const char* library_search_path) {
+  return __loader_android_init_anonymous_namespace(shared_libs_sonames, library_search_path);
+}
+
+struct android_namespace_t* 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) {
+  const void* caller_addr = __builtin_return_address(0);
+  return __loader_android_create_namespace(name,
+                                           ld_library_path,
+                                           default_library_path,
+                                           type,
+                                           permitted_when_isolated_path,
+                                           parent,
+                                           caller_addr);
+}
+
+bool android_link_namespaces(struct android_namespace_t* namespace_from,
+                             struct android_namespace_t* namespace_to,
+                             const char* shared_libs_sonames) {
+  return __loader_android_link_namespaces(namespace_from, namespace_to, shared_libs_sonames);
+}
+
+void android_dlwarning(void* obj, void (*f)(void*, const char*)) {
+  __loader_android_dlwarning(obj, f);
+}
+
+struct android_namespace_t* android_get_exported_namespace(const char* name) {
+  return __loader_android_get_exported_namespace(name);
+}