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/kerneldump.h

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    1 /*-
    2  * Copyright (c) 2002 Poul-Henning Kamp
    3  * Copyright (c) 2002 Networks Associates Technology, Inc.
    4  * All rights reserved.
    5  *
    6  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
    7  * and NAI Labs, the Security Research Division of Network Associates, Inc.
    8  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
    9  * DARPA CHATS research program.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. The names of the authors may not be used to endorse or promote
   20  *    products derived from this software without specific prior written
   21  *    permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  * $FreeBSD: src/sys/sys/kerneldump.h,v 1.6.8.1 2005/06/23 19:54:26 peter Exp $
   36  */
   37 
   38 #ifndef _SYS_KERNELDUMP_H
   39 #define _SYS_KERNELDUMP_H
   40 
   41 #include <machine/endian.h>
   42 
   43 #if BYTE_ORDER == LITTLE_ENDIAN
   44 #define dtoh32(x)       __bswap32(x)
   45 #define dtoh64(x)       __bswap64(x)
   46 #define htod32(x)       __bswap32(x)
   47 #define htod64(x)       __bswap64(x)
   48 #elif BYTE_ORDER == BIG_ENDIAN
   49 #define dtoh32(x)       (x)
   50 #define dtoh64(x)       (x)
   51 #define htod32(x)       (x)
   52 #define htod64(x)       (x)
   53 #endif
   54 
   55 /*
   56  * All uintX_t fields are in dump byte order, which is the same as
   57  * network byte order. Use the macros defined above to read or
   58  * write the fields.
   59  */
   60 struct kerneldumpheader {
   61         char            magic[20];
   62 #define KERNELDUMPMAGIC         "FreeBSD Kernel Dump"
   63 #define KERNELDUMPMAGIC_CLEARED "Cleared Kernel Dump"
   64         char            architecture[12];
   65         uint32_t        version;
   66 #define KERNELDUMPVERSION       1
   67         uint32_t        architectureversion;
   68 #define KERNELDUMP_ALPHA_VERSION        1
   69 #define KERNELDUMP_I386_VERSION 1
   70 #define KERNELDUMP_IA64_VERSION 1
   71 #define KERNELDUMP_SPARC64_VERSION      1
   72 #define KERNELDUMP_AMD64_VERSION        1
   73         uint64_t        dumplength;             /* excl headers */
   74         uint64_t        dumptime;
   75         uint32_t        blocksize;
   76         char            hostname[64];
   77         char            versionstring[192];
   78         char            panicstring[192];
   79         uint32_t        parity;
   80 };
   81 
   82 /*
   83  * Parity calculation is endian insensitive.
   84  */
   85 static __inline u_int32_t
   86 kerneldump_parity(struct kerneldumpheader *kdhp)
   87 {
   88         uint32_t *up, parity;
   89         u_int i;
   90 
   91         up = (uint32_t *)kdhp;
   92         parity = 0;
   93         for (i = 0; i < sizeof *kdhp; i += sizeof *up)
   94                 parity ^= *up++;
   95         return (parity);
   96 }
   97 
   98 
   99 #endif /* _SYS_KERNELDUMP_H */

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