| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| #ifndef __ANDROID_DLEXT_H__ |
| #define __ANDROID_DLEXT_H__ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <sys/cdefs.h> |
| |
| __BEGIN_DECLS |
| |
| /* bitfield definitions for android_dlextinfo.flags */ |
| enum { |
| /* When set, the reserved_addr and reserved_size fields must point to an |
| * already-reserved region of address space which will be used to load the |
| * library if it fits. If the reserved region is not large enough, the load |
| * will fail. |
| */ |
| ANDROID_DLEXT_RESERVED_ADDRESS = 0x1, |
| |
| /* As DLEXT_RESERVED_ADDRESS, but if the reserved region is not large enough, |
| * the linker will choose an available address instead. |
| */ |
| ANDROID_DLEXT_RESERVED_ADDRESS_HINT = 0x2, |
| |
| /* When set, write the GNU RELRO section of the mapped library to relro_fd |
| * after relocation has been performed, to allow it to be reused by another |
| * process loading the same library at the same address. This implies |
| * ANDROID_DLEXT_USE_RELRO. |
| */ |
| ANDROID_DLEXT_WRITE_RELRO = 0x4, |
| |
| /* When set, compare the GNU RELRO section of the mapped library to relro_fd |
| * after relocation has been performed, and replace any relocated pages that |
| * are identical with a version mapped from the file. |
| */ |
| ANDROID_DLEXT_USE_RELRO = 0x8, |
| |
| /* Instruct dlopen to use library_fd instead of opening file by name. |
| * The filename parameter is still used to identify the library. |
| */ |
| ANDROID_DLEXT_USE_LIBRARY_FD = 0x10, |
| |
| /* Mask of valid bits */ |
| ANDROID_DLEXT_VALID_FLAG_BITS = ANDROID_DLEXT_RESERVED_ADDRESS | |
| ANDROID_DLEXT_RESERVED_ADDRESS_HINT | |
| ANDROID_DLEXT_WRITE_RELRO | |
| ANDROID_DLEXT_USE_RELRO | |
| ANDROID_DLEXT_USE_LIBRARY_FD, |
| }; |
| |
| typedef struct { |
| uint64_t flags; |
| void* reserved_addr; |
| size_t reserved_size; |
| int relro_fd; |
| int library_fd; |
| } android_dlextinfo; |
| |
| extern void* android_dlopen_ext(const char* filename, int flag, const android_dlextinfo* extinfo); |
| |
| __END_DECLS |
| |
| #endif /* __ANDROID_DLEXT_H__ */ |
