Masking version differences.
Attached is "fixscript" written by Mark Spieth. The discussion of
flavor difference problems motivates my sending it in, though I don't
have a deep enough understanding of the problems in this arena to be
sure it will be useful. In the Winmodems list, we use it to mask/bypass
symbol differences between flavors (and when alas forced, even between
versions) of winmodem drivers and kernels. Extended functionality of
the drivers is thus attained, where resources for compiling version
matched drivers has not been provided.
Having to use it is clearly undesirable, but it may help in building
some temporary bridges in the developement processes.
MarvS
#! /bin/bash
# To make this file executable: chmod +x fixscript
# This is a very slight edit of the ltfixscript contributed to
# the Linmodems Newslist
# From - Sun Jul 23 04:27:38 2000
# From: "Mark Spieth" <mark at digivation.com.au>
# To: <discuss@linmodems.org>
# Subject: ltmodem symbols and version fixed
# Date: Sun, 23 Jul 2000 12:39:44 +1000
# Organization: Digivation Pty Ltd
echo "Fixscript V1.7"
if [ -z "$1" -o -z "$2" ]; then
cat <<END
This script changes version number tags of binary
kernel modules to match the version of the currently
running kernel. It also renames any symbol that the
current kernel can't resolve into their equivalent
resolvable symbols.
For inserting binary modules into kernels, the 'fixed'
module can be inserted with:
insmod module
which is used in automated kernel module management,
rather than forcing module loading with:
insmod -f module
which is necessary when kernel and module versions
are not matched.
WARNING! This change is purely cosmetic, and the use
of version matched binaries whenever possible is
strongly advised. It may crash your kernel due to
inconsistencies in data structures between the kernel
as it stands and the headers used to originally compile
the module being fixed. No guarantees are given or implied
under any circumstances.
GNU objcopy version 2.9.5 or later is required;
this is provided as part of the 'binary utilities'
packages such as the Debian binutils.deb
USAGE: fixscript input-file output-file
END
exit 1
fi
MI=/tmp/modinfo
[ -z "$DEPMOD" ] && DEPMOD=depmod
#new kernel version modinfo section
echo -ne "kernel_version="`uname -r`"\0" > $MI
#build the objcopy command
CMD="objcopy"
for i in `$DEPMOD -e $1 2>&1 | sed 's/depmod://g' | grep -vE "^$1:|Unresolved symbols|^#"` ; do
echo -n doing $i
i1=`echo $i | awk '{
gsub(/_R[0-9a-fA-F]+/,"");
printf("%s", $1);
}'`
echo -n " trunc=$i1"
new=`awk '/ '$i1'_R/ {
printf("%s", $2);
}' < /proc/ksyms`
echo " new=$new"
CMD="$CMD --redefine-sym=$i=$new"
done
#fix symbols which conflict with the serial driver
CMD="$CMD --redefine-sym=register_serial=register_lucent"
CMD="$CMD --redefine-sym=unregister_serial=unregister_lucent"
CMD="$CMD --redefine-sym=serial_console_init=ltmodem_console_init"
#replace the modinfo section with the new one
CMD="$CMD --remove-section=.modinfo --add-section=.modinfo=$MI"
CMD="$CMD $*"
#run the command
$CMD
#remove the section file
rm -f $MI
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