powerpc: Reset MSR_LE on signal entry

We always take signals in big endian which is wrong. Signals
should be taken in native endian.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index bebdf1a1a5403df741ea389102f1b69b80daf60e..b386b0be8d02bde1912c4f26cb564b0824bb5020 100644 (file)
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1045,8 +1045,9 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
        regs->gpr[5] = (unsigned long) &rt_sf->uc;
        regs->gpr[6] = (unsigned long) rt_sf;
        regs->nip = (unsigned long) ka->sa.sa_handler;
-       /* enter the signal handler in big-endian mode */
+       /* enter the signal handler in native-endian mode */
        regs->msr &= ~MSR_LE;
+       regs->msr |= (MSR_KERNEL & MSR_LE);
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
        /* Remove TM bits from thread's MSR.  The MSR in the sigcontext
         * just indicates to userland that we were doing a transaction, but we

diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index f93ec2835a13f01294a9b3d5c225686a04666702..8b51b02781060ecce193c2e57bc0ed9532a6f2d7 100644 (file)
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -773,8 +773,9 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
 
        /* Set up "regs" so we "return" to the signal handler. */
        err |= get_user(regs->nip, &funct_desc_ptr->entry);
-       /* enter the signal handler in big-endian mode */
+       /* enter the signal handler in native-endian mode */
        regs->msr &= ~MSR_LE;
+       regs->msr |= (MSR_KERNEL & MSR_LE);
        regs->gpr[1] = newsp;
        err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
        regs->gpr[3] = signr;