1bdc37934SDmitry Chagin /*- 2*c47116e9SDmitry Chagin * SPDX-License-Identifier: BSD-2-Clause 3*c47116e9SDmitry Chagin * 41ca6b15bSDmitry Chagin * Copyright (c) 2013-2021 Dmitry Chagin <dchagin@FreeBSD.org> 5bdc37934SDmitry Chagin * 6bdc37934SDmitry Chagin * Redistribution and use in source and binary forms, with or without 7bdc37934SDmitry Chagin * modification, are permitted provided that the following conditions 8bdc37934SDmitry Chagin * are met: 9bdc37934SDmitry Chagin * 1. Redistributions of source code must retain the above copyright 10*c47116e9SDmitry Chagin * notice, this list of conditions and the following disclaimer. 11bdc37934SDmitry Chagin * 2. Redistributions in binary form must reproduce the above copyright 12bdc37934SDmitry Chagin * notice, this list of conditions and the following disclaimer in the 13bdc37934SDmitry Chagin * documentation and/or other materials provided with the distribution. 14bdc37934SDmitry Chagin * 15*c47116e9SDmitry Chagin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*c47116e9SDmitry Chagin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*c47116e9SDmitry Chagin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*c47116e9SDmitry Chagin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*c47116e9SDmitry Chagin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*c47116e9SDmitry Chagin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*c47116e9SDmitry Chagin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*c47116e9SDmitry Chagin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*c47116e9SDmitry Chagin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*c47116e9SDmitry Chagin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*c47116e9SDmitry Chagin * SUCH DAMAGE. 26bdc37934SDmitry Chagin */ 27bdc37934SDmitry Chagin 28bdc37934SDmitry Chagin #ifndef _LINUX_VDSO_H_ 29bdc37934SDmitry Chagin #define _LINUX_VDSO_H_ 30bdc37934SDmitry Chagin 31bdc37934SDmitry Chagin struct linux_vdso_sym { 32bdc37934SDmitry Chagin SLIST_ENTRY(linux_vdso_sym) sym; 33bdc37934SDmitry Chagin uint32_t size; 34bdc37934SDmitry Chagin uintptr_t * ptr; 35bdc37934SDmitry Chagin char symname[]; 36bdc37934SDmitry Chagin }; 37bdc37934SDmitry Chagin 389931033bSDmitry Chagin vm_object_t __elfN(linux_shared_page_init)(char **, vm_size_t); 399931033bSDmitry Chagin void __elfN(linux_shared_page_fini)(vm_object_t, void *, vm_size_t); 409931033bSDmitry Chagin void __elfN(linux_vdso_fixup)(char *, vm_offset_t); 41bdc37934SDmitry Chagin void __elfN(linux_vdso_sym_init)(struct linux_vdso_sym *); 42bdc37934SDmitry Chagin 439931033bSDmitry Chagin int linux_map_vdso(struct proc *, vm_object_t, vm_offset_t, 449931033bSDmitry Chagin vm_offset_t, struct image_params *); 459931033bSDmitry Chagin 46bdc37934SDmitry Chagin #define LINUX_VDSO_SYM_INTPTR(name) \ 47bdc37934SDmitry Chagin uintptr_t name; \ 48bdc37934SDmitry Chagin LINUX_VDSO_SYM_DEFINE(name) 49bdc37934SDmitry Chagin 50bdc37934SDmitry Chagin #define LINUX_VDSO_SYM_CHAR(name) \ 51bdc37934SDmitry Chagin const char * name; \ 52bdc37934SDmitry Chagin LINUX_VDSO_SYM_DEFINE(name) 53bdc37934SDmitry Chagin 54bdc37934SDmitry Chagin #define LINUX_VDSO_SYM_DEFINE(name) \ 55bdc37934SDmitry Chagin static struct linux_vdso_sym name ## sym = { \ 56bdc37934SDmitry Chagin .symname = #name, \ 57bdc37934SDmitry Chagin .size = sizeof(#name), \ 58bdc37934SDmitry Chagin .ptr = (uintptr_t *)&name \ 59bdc37934SDmitry Chagin }; \ 60bdc37934SDmitry Chagin SYSINIT(__elfN(name ## _sym_init), SI_SUB_EXEC, \ 61bdc37934SDmitry Chagin SI_ORDER_FIRST, __elfN(linux_vdso_sym_init), &name ## sym); \ 62bdc37934SDmitry Chagin struct __hack 63bdc37934SDmitry Chagin 64bdc37934SDmitry Chagin #endif /* _LINUX_VDSO_H_ */ 65