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/sys/ksyms.h

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    1 /*      $NetBSD: ksyms.h,v 1.8 2003/11/17 10:16:18 cube Exp $   */
    2 /*
    3  * Copyright (c) 2001, 2003 Anders Magnusson (ragge@ludd.luth.se).
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   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  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #ifndef _SYS_KSYMS_H_
   30 #define _SYS_KSYMS_H_
   31 
   32 /*
   33  * Do a lookup of a symbol using the in-kernel lookup algorithm.
   34  */
   35 struct ksyms_gsymbol {
   36         const char *kg_name;
   37         union {
   38                 void *ku_sym;            /* Normally Elf_Sym */
   39                 unsigned long *ku_value;
   40         } _un;
   41 #define kg_sym _un.ku_sym
   42 #define kg_value _un.ku_value
   43 };
   44 
   45 #define KIOCGSYMBOL     _IOW('l', 1, struct ksyms_gsymbol)
   46 #define KIOCGVALUE      _IOW('l', 2, struct ksyms_gsymbol)
   47 #define KIOCGSIZE       _IOR('l', 3, int)
   48 
   49 #ifdef _KERNEL
   50 /*
   51  * Definitions used in ksyms_getname() and ksyms_getval().
   52  */
   53 #define KSYMS_CLOSEST   0001    /* Nearest lower match */
   54 #define KSYMS_EXACT     0002    /* Only exact match allowed */
   55 #define KSYMS_EXTERN    0000    /* Only external symbols (pseudo) */
   56 #define KSYMS_PROC      0100    /* Procedures only */
   57 #define KSYMS_ANY       0200    /* Also local symbols (DDB use only) */
   58 
   59 /*
   60  * Prototypes
   61  */
   62 int ksyms_getname(const char **, char **, vaddr_t, int);
   63 int ksyms_getval(const char *, char *, unsigned long *, int, int);
   64 #define ksyms_getval_from_kernel(a,b,c,d)       ksyms_getval(a,b,c,d,0)
   65 #define ksyms_getval_from_userland(a,b,c,d)     ksyms_getval(a,b,c,d,1)
   66 int ksyms_addsymtab(const char *, void *, vsize_t, char *, vsize_t);
   67 int ksyms_delsymtab(const char *);
   68 int ksyms_rensymtab(const char *, const char*);
   69 void ksyms_init(int, void *, void *);
   70 #ifdef DDB
   71 int ksyms_sift(char *, char *, int);
   72 #endif
   73 #endif /* _KERNEL */
   74 #endif /* _SYS_KSYMS_H_ */

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