From: Anton Blanchard Date: Mon, 23 Sep 2013 02:04:43 +0000 (+1000) Subject: powerpc: Reset MSR_LE on signal entry X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e871c6bbf66c1b44af0fb925427e957301e2e1ff;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index bebdf1a1a540..b386b0be8d02 100644 --- 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 f93ec2835a13..8b51b0278106 100644 --- 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;