86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/*
|
|
* 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 <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,
|
|
|
|
/* When opening library using library_fd read it starting with library_offset
|
|
* This flag is only valid when ANDROID_DLEXT_USE_LIBRARY_FD is set.
|
|
*/
|
|
|
|
ANDROID_DLEXT_USE_LIBRARY_OFFSET = 0x20,
|
|
|
|
/* 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 |
|
|
ANDROID_DLEXT_USE_LIBRARY_OFFSET,
|
|
};
|
|
|
|
typedef struct {
|
|
uint64_t flags;
|
|
void* reserved_addr;
|
|
size_t reserved_size;
|
|
int relro_fd;
|
|
int library_fd;
|
|
off64_t library_offset;
|
|
} android_dlextinfo;
|
|
|
|
extern void* android_dlopen_ext(const char* filename, int flag, const android_dlextinfo* extinfo);
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* __ANDROID_DLEXT_H__ */
|