The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_vdso.h

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    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: releng/11.1/sys/compat/linux/linux_vdso.h 283417 2015-05-24 15:45:36Z dchagin $
   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_ */

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