commit: 53399053eb505cf541b2405bd9d9bca5ecfb96fb From: Russell King <[email protected]> Date: Sun, 20 Feb 2011 12:22:52 +0000 Subject: [PATCH] ARM: Ensure predictable endian state on signal handler entry
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. Cc: <[email protected]> Acked-by: Dave Martin <[email protected]> Signed-off-by: Russell King <[email protected]> --- arch/arm/kernel/signal.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 907d5a6..abaf844 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -474,7 +474,9 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka, 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. _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
