1 /*- 2 * Copyright (c) 2013 Dmitry Chagin 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _LINUX_VDSO_H_ 30 #define _LINUX_VDSO_H_ 31 32 #include <sys/types.h> 33 34 struct linux_vdso_sym { 35 SLIST_ENTRY(linux_vdso_sym) sym; 36 uint32_t size; 37 uintptr_t * ptr; 38 char symname[]; 39 }; 40 41 vm_object_t __elfN(linux_shared_page_init)(char **); 42 void __elfN(linux_shared_page_fini)(vm_object_t); 43 void __elfN(linux_vdso_fixup)(struct sysentvec *); 44 void __elfN(linux_vdso_reloc)(struct sysentvec *, long); 45 void __elfN(linux_vdso_sym_init)(struct linux_vdso_sym *); 46 47 #define LINUX_VDSO_SYM_INTPTR(name) \ 48 uintptr_t name; \ 49 LINUX_VDSO_SYM_DEFINE(name) 50 51 #define LINUX_VDSO_SYM_CHAR(name) \ 52 const char * name; \ 53 LINUX_VDSO_SYM_DEFINE(name) 54 55 #define LINUX_VDSO_SYM_DEFINE(name) \ 56 static struct linux_vdso_sym name ## sym = { \ 57 .symname = #name, \ 58 .size = sizeof(#name), \ 59 .ptr = (uintptr_t *)&name \ 60 }; \ 61 SYSINIT(__elfN(name ## _sym_init), SI_SUB_EXEC, \ 62 SI_ORDER_FIRST, __elfN(linux_vdso_sym_init), &name ## sym); \ 63 struct __hack 64 65 #endif /* _LINUX_VDSO_H_ */ 66