linux/arch
Martin Schwidefsky 043d07084b [S390] Remove data execution protection
The noexec support on s390 does not rely on a bit in the page table
entry but utilizes the secondary space mode to distinguish between
memory accesses for instructions vs. data. The noexec code relies
on the assumption that the cpu will always use the secondary space
page table for data accesses while it is running in the secondary
space mode. Up to the z9-109 class machines this has been the case.
Unfortunately this is not true anymore with z10 and later machines.
The load-relative-long instructions lrl, lgrl and lgfrl access the
memory operand using the same addressing-space mode that has been
used to fetch the instruction.
This breaks the noexec mode for all user space binaries compiled
with march=z10 or later. The only option is to remove the current
noexec support.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-05-23 10:24:28 +02:00
..
alpha Merge commit '317f394160e9beb97d19a84c39b7e5eb3d7815a8' 2011-05-20 13:10:22 -07:00
arm Merge commit '317f394160e9beb97d19a84c39b7e5eb3d7815a8' 2011-05-20 13:10:22 -07:00
avr32 PM / AVR32: Use struct syscore_ops instead of sysdevs for PM 2011-05-11 21:37:14 +02:00
blackfin Merge commit '317f394160e9beb97d19a84c39b7e5eb3d7815a8' 2011-05-20 13:10:22 -07:00
cris sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() 2011-04-14 08:52:32 +02:00
frv Fix common misspellings 2011-03-31 11:26:23 -03:00
h8300 genirq: Remove the now obsolete config options and select statements 2011-03-30 14:13:23 +02:00
ia64 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2011-05-20 13:39:00 -07:00
m32r extable, core_kernel_data(): Make sure all archs define _sdata 2011-05-20 08:56:56 +02:00
m68k extable, core_kernel_data(): Make sure all archs define _sdata 2011-05-20 08:56:56 +02:00
microblaze Merge branch 'consolidate-clksrc-i8253' of master.kernel.org:~rmk/linux-2.6-arm into timers/clocksource 2011-05-14 12:06:36 +02:00
mips Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
mn10300 sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() 2011-04-14 08:52:32 +02:00
parisc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6 2011-05-22 12:38:40 -07:00
powerpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2011-05-20 17:24:14 -07:00
s390 [S390] Remove data execution protection 2011-05-23 10:24:28 +02:00
score Fix common misspellings 2011-03-31 11:26:23 -03:00
sh sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6 2011-05-22 22:06:24 -07:00
tile sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() 2011-04-14 08:52:32 +02:00
um Merge commit '317f394160e9beb97d19a84c39b7e5eb3d7815a8' 2011-05-20 13:10:22 -07:00
unicore32 Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-05-19 18:24:11 -07:00
x86 x86: setup_smep needs to be __cpuinit 2011-05-22 21:44:13 -07:00
xtensa xtensa: Fixup irq conversion fallout and nmi_count 2011-04-20 00:32:09 +02:00
.gitignore
Kconfig oprofile, s390: Cleanups 2011-03-16 14:30:40 +01:00