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Diffstat (limited to 'contrib/ntp/html/hints/solaris.xtra.patchfreq')
-rw-r--r-- | contrib/ntp/html/hints/solaris.xtra.patchfreq | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/contrib/ntp/html/hints/solaris.xtra.patchfreq b/contrib/ntp/html/hints/solaris.xtra.patchfreq new file mode 100644 index 0000000..9600881 --- /dev/null +++ b/contrib/ntp/html/hints/solaris.xtra.patchfreq @@ -0,0 +1,85 @@ +#!/bin/ksh + +# +# File: patchfreq +# Author: Bryan Cantrill (bmc@eng.sun.com), Solaris Performance +# Modified: Sat Apr 26 04:00:59 PDT 1997 +# +# This is a little script to patch a 5.5 or 5.5.1 kernel to get around +# the cpu_tick_freq inaccuracy. Before running this script, one must +# know the true frequency of one's CPU; this can be derived by NTP, +# or by observing the clock relative to the time-of-day chip over a +# long period of time (the TOD will pull system time when it drifts +# by more than two seconds). +# +# Patching a kernel can render a machine unbootable; do not run this +# script unless you are prepared to accept that possibility. It +# is advisable to have a backout path (e.g. net booting, an alternate +# boot disk, an installation CD) should your machine fail to boot. +# +# This is not a product of Sun Microsystems, and is provided "as is", +# without warranty of any kind expressed or implied including, but not +# limited to, the suitability of this script for any purpose. +# + +if [ $# -eq 0 ]; then + echo "Usage: $0 cpu_tick_freq [ alternate_kernel ]" + exit 1 +fi + +cpu_tick_freq=$1 +kernel=/platform/sun4u/kernel/unix + +if [ $# -eq 2 ]; then + kernel=$2 +fi + +if [ ! -w $kernel ]; then + echo "$0: Cannot open $kernel for writing." + exit 1 +fi + +arch=`echo utsname+404?s | adb $kernel | cut -d: -f2` + +if [ ! $arch = "sun4u" ]; then + echo "Patch only applies to sun4u" + exit 1 +fi + +rel=`echo utsname+202?s | adb $kernel | cut -d: -f2` + +if [ ! $rel = "5.5" ] && [ ! $rel = "5.5.1" ]; then + echo "Patch only applies to 5.5 or 5.5.1..." + exit 1 +fi + +nop="1000000" # nop +store_mask="ffffe000" # mask out low 13 bits +store="da256000" # st %o5, [%l5 + offset] + +instr=`echo setcpudelay+34?X | adb $kernel | cut -d: -f 2 | nawk '{ print $1 }'` + +if [ $instr = $nop ]; then + echo "Instruction already patched..." +else + let masked="(16#$store_mask & 16#$instr) - 16#$store" + if [ $masked -ne 0 ]; then + echo "Couldn't find instruction to patch; aborting." + exit 1 + fi + + if ! echo setcpudelay+34?W $nop | adb -w $kernel 1> /dev/null + then + echo "adb returned an unexpected error; aborting." + fi +fi + +echo "Patching cpu_tick_freq to $cpu_tick_freq..." + +if ! echo cpu_tick_freq?W 0t$cpu_tick_freq | adb -w $kernel 1> /dev/null; then + echo "adb returned an unexpected error; aborting." + exit 1 +fi + +echo "$kernel successfully patched." +exit 0 |