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: stable/11/sys/sys/kerneldump.h 331722 2018-03-29 02:50:57Z eadler $
   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 TEXTDUMPMAGIC           "FreeBSD Text Dump"
   64 #define KERNELDUMPMAGIC_CLEARED "Cleared Kernel Dump"
   65         char            architecture[12];
   66         uint32_t        version;
   67 #define KERNELDUMPVERSION       1
   68         uint32_t        architectureversion;
   69 #define KERNELDUMP_AARCH64_VERSION      1
   70 #define KERNELDUMP_AMD64_VERSION        2
   71 #define KERNELDUMP_ARM_VERSION          1
   72 #define KERNELDUMP_I386_VERSION         2
   73 #define KERNELDUMP_MIPS_VERSION         1
   74 #define KERNELDUMP_POWERPC_VERSION      1
   75 #define KERNELDUMP_RISCV_VERSION        1
   76 #define KERNELDUMP_SPARC64_VERSION      1
   77 #define KERNELDUMP_TEXT_VERSION         1
   78         uint64_t        dumplength;             /* excl headers */
   79         uint64_t        dumptime;
   80         uint32_t        blocksize;
   81         char            hostname[64];
   82         char            versionstring[192];
   83         char            panicstring[192];
   84         uint32_t        parity;
   85 };
   86 
   87 /*
   88  * Parity calculation is endian insensitive.
   89  */
   90 static __inline u_int32_t
   91 kerneldump_parity(struct kerneldumpheader *kdhp)
   92 {
   93         uint32_t *up, parity;
   94         u_int i;
   95 
   96         up = (uint32_t *)kdhp;
   97         parity = 0;
   98         for (i = 0; i < sizeof *kdhp; i += sizeof *up)
   99                 parity ^= *up++;
  100         return (parity);
  101 }
  102 
  103 #ifdef _KERNEL
  104 struct dump_pa {
  105         vm_paddr_t pa_start;
  106         vm_paddr_t pa_size;
  107 };
  108 
  109 void mkdumpheader(struct kerneldumpheader *kdh, char *magic, uint32_t archver,
  110     uint64_t dumplen, uint32_t blksz);
  111 
  112 int dumpsys_generic(struct dumperinfo *);
  113 
  114 void dumpsys_map_chunk(vm_paddr_t, size_t, void **);
  115 typedef int dumpsys_callback_t(struct dump_pa *, int, void *);
  116 int dumpsys_foreach_chunk(dumpsys_callback_t, void *);
  117 int dumpsys_cb_dumpdata(struct dump_pa *, int, void *);
  118 int dumpsys_buf_write(struct dumperinfo *, char *, size_t);
  119 int dumpsys_buf_flush(struct dumperinfo *);
  120 
  121 void dumpsys_gen_pa_init(void);
  122 struct dump_pa *dumpsys_gen_pa_next(struct dump_pa *);
  123 void dumpsys_gen_wbinv_all(void);
  124 void dumpsys_gen_unmap_chunk(vm_paddr_t, size_t, void *);
  125 int dumpsys_gen_write_aux_headers(struct dumperinfo *);
  126 
  127 extern int do_minidump;
  128 
  129 #endif
  130 
  131 #endif /* _SYS_KERNELDUMP_H */

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