From 36a4526583ad61fe7cb7432f53bce52ea198813a Mon Sep 17 00:00:00 2001 From: Hiroshi Shimamoto Date: Fri, 27 Feb 2009 10:29:09 -0800 Subject: [PATCH] x86: signal: use 16 bytes boundary for rt_sigframe Impact: cleanup Supporting xsave/xrestore introduces 64 bytes boundary for save_i387_xstate(). 16 bytes boundary is OK for rt_sigframe. Signed-off-by: Hiroshi Shimamoto Signed-off-by: Ingo Molnar --- arch/x86/kernel/signal.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 82d37c7..89ef90d 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -409,15 +409,13 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size, if (used_math()) { sp -= sig_xstate_size; *fpstate = (void __user *)round_down(sp, 64); + if (save_i387_xstate(*fpstate) < 0) return (void __user *) -1L; - - sp -= frame_size; - return (void __user *)round_down(sp, 16) - 8; } sp -= frame_size; - return (void __user *)round_down(sp, 64) - 8; + return (void __user *)round_down(sp, 16) - 8; } static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, -- 2.7.4