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/gdbscripts/msgbuf

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    1 # $NetBSD: msgbuf,v 1.2 2001/01/11 05:31:02 deberg Exp $
    2 #
    3 # Copyright (c) 2000 The NetBSD Foundation, Inc.
    4 # All rights reserved.
    5 #
    6 # This code is derived from software contributed to The NetBSD Foundation
    7 # by John A. Hawkinson
    8 #
    9 # Redistribution and use in source and binary forms, with or without
   10 # modification, are permitted provided that the following conditions
   11 # are met:
   12 # 1. Redistributions of source code must retain the above copyright
   13 #    notice, this list of conditions and the following disclaimer.
   14 # 2. Redistributions in binary form must reproduce the above copyright
   15 #    notice, this list of conditions and the following disclaimer in the
   16 #    documentation and/or other materials provided with the distribution.
   17 # 3. All advertising materials mentioning features or use of this software
   18 #    must display the following acknowledgement:
   19 #        This product includes software developed by the NetBSD
   20 #        Foundation, Inc. and its contributors.
   21 # 4. Neither the name of The NetBSD Foundation nor the names of its
   22 #    contributors may be used to endorse or promote products derived
   23 #    from this software without specific prior written permission.
   24 #
   25 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   26 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   29 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35 # POSSIBILITY OF SUCH DAMAGE.
   36 #
   37 
   38 define msgbuf
   39   set $bufx=*(long*)((char *)msgbufp+1*sizeof(long))
   40   set $bufr=*(long*)((char *)msgbufp+2*sizeof(long))
   41   set $bufs=*(long*)((char *)msgbufp+3*sizeof(long))
   42 
   43   printf "msgbufp %#x: bufx %d bufr %d bufs %d\n", msgbufp, $bufx, $bufr, $bufs
   44 
   45 # Dump the unread section
   46 #  set $l = $bufx - $bufr
   47 #  if ($l < 0)
   48 #    set $l = $bufs - $bufr
   49 #  end
   50 #  set $p = (long)msgbufp+4*sizeof(long)+$bufr
   51 #  set print elements $l
   52 #  x/s $p
   53 
   54 # Dump the whole thing
   55 # Presume each section is null-terminated. Possibly bad presumption?
   56   set $p = (long)msgbufp+4*sizeof(long)+$bufx
   57   set $l = $bufs - $bufx
   58   set print elements $l
   59   printf "Dumping %#x length %d\n", $p, $l  
   60   # XXX (unsupported by gdb): printf "%.*s\n", $l, $p
   61   printf "%s\n", $p
   62   set $p = (long)msgbufp+4*sizeof(long)
   63   set $l = $bufx
   64   set print elements $l
   65   printf "Dumping %#x length %d\n", $p, $l  
   66   # XXX (unsupported by gdb): printf "%.*s\n\n", $l, $p
   67   printf "%s\n\n", $p
   68 end
   69 
   70 document msgbuf
   71   Dump the kernel message buffer.
   72 end

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