On Thu, Nov 13, 2003 at 12:39:29PM +0000, M A Young wrote: > On Thu, 13 Nov 2003, Jakub Jelinek wrote: > > > On Thu, Nov 13, 2003 at 09:12:02AM +0100, pascal.rapaz@xxxxxxxx wrote: > > > Yes! > > > > > > But I'm very surprised because the LD_ASSUME_KERNEL=2.2.5 must desactive > > > the nptl option and that work fine in RH 9.0 but not in Fedora Core. > > > Moreover this option is part of the Fedroa release notes. > > > > LD_ASSUME_KERNEL=2.2.5 works, just run: > > > > LD_ASSUME_KERNEL=2.2.5 ldd someprog > > LD_ASSUME_KERNEL=2.4.19 ldd someprog > > ldd someprog > > > > and see what libraries are used (should be /lib/libc.so.6 in the first case, > > /lib/i686/libc.so.6 in second and /lib/tls/libc.so.6 in third). > > > > Some buggy JDKs don't work even with LinuxThreads, or just with one > > of LinuxThreads alternatives (non-FLOATING_STACKS (2.2.5) > > or FLOATING_STACKS (2.4.19)). > > The other thing that can cause problems is exec-shield (though if it does > there is probably a fault in the program). Try > echo "0" >/proc/sys/kernel/exec-shield > echo "0" >/proc/sys/kernel/exec-shield-randomize > and see if your program runs. In that case: echo "0" >/proc/sys/kernel/exec-shield-randomize perl -pi -e 's/PRELINK_OPTS=-mR/PRELINK_OPTS="-mR --no-exec-shield"/' \ /etc/sysconfig/prelink touch /var/lib/misc/prelink.force /etc/cron.daily/prelink On prelinked system, turning off exec shield randomization will help you only a little bit, you need to tell prelink to put libraries at 0x40000000 .. 0x50000000 addresses. /proc/sys/kernel/exec-shield shouldn't make a difference I think, as the JDK certainly doesn't have PT_GNU_STACK program header entry. Jakub
