Messages in this thread Patch in this message | | | Date | Tue, 22 Feb 2011 14:17:34 -0800 | From | Greg KH <> | Subject | [55/70] ARM: Ensure predictable endian state on signal handler entry |
| |
2.6.37-stable review patch. If anyone has any objections, please let us know.
------------------
From: Russell King <rmk+kernel@arm.linux.org.uk>
commit 53399053eb505cf541b2405bd9d9bca5ecfb96fb upstream.
Ensure a predictable endian state when entering signal handlers. This avoids programs which use SETEND to momentarily switch their endian state from having their signal handlers entered with an unpredictable endian state.
Acked-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/arm/kernel/signal.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -474,7 +474,9 @@ setup_return(struct pt_regs *regs, struc unsigned long handler = (unsigned long)ka->sa.sa_handler; unsigned long retcode; int thumb = 0; - unsigned long cpsr = regs->ARM_cpsr & ~PSR_f; + unsigned long cpsr = regs->ARM_cpsr & ~(PSR_f | PSR_E_BIT); + + cpsr |= PSR_ENDSTATE; /* * Maybe we need to deliver a 32-bit signal to a 26-bit task.
| |