/contrib/ntp/html/build/hints/solaris.xtra.patchfreq
https://bitbucket.org/freebsd/freebsd-head/ · Korn Shell · 85 lines · 51 code · 12 blank · 22 comment · 9 complexity · 3089adb9303fe59b00bbe8562ac173d5 MD5 · raw file
- #!/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