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powerpc: Emulate instructions in little endian mode
authorAnton Blanchard <anton@samba.org>
Tue, 6 Aug 2013 16:01:47 +0000 (02:01 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 14 Aug 2013 05:33:35 +0000 (15:33 +1000)
Alistair noticed we got a SIGILL on userspace mfpvr instructions.

Remove the little endian check in the emulation code, it is
probably there to protect against the old pseudo little endian
implementations but doesn't make sense for real little endian.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/traps.c patch | blob | blame | history

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index e6fac2102b067540bffdae07e7222d3dec0183ab..bdf2dd14159882c4cd299d7286314bf8df902d5d 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -967,7 +967,7 @@ static int emulate_instruction(struct pt_regs *regs)
        u32 instword;
        u32 rd;
 
-       if (!user_mode(regs) || (regs->msr & MSR_LE))
+       if (!user_mode(regs))
                return -EINVAL;
        CHECK_FULL_REGS(regs);