From 3896625d0badd53dbc34d584861a36ba7eb4613f Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Tue, 30 Jan 2007 14:36:17 -0800 Subject: [PATCH] uml: fix signal frame alignment Use the same signal frame alignment calculations as the underlying architecture. x86_64 appeared to do this, but the "- 8" was really subtracting 8 * sizeof(struct rt_sigframe) rather than 8 bytes. UML/i386 might have been OK, but I changed the calculation to match i386 just to be sure. Signed-off-by: Jeff Dike Cc: Cc: Adrian Bunk Cc: Paolo 'Blaisorblade' Giarrusso Acked-by: Antoine Martin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/sys-x86_64/signal.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/um/sys-x86_64') diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c index 9edf114faf79..af2f017617b4 100644 --- a/arch/um/sys-x86_64/signal.c +++ b/arch/um/sys-x86_64/signal.c @@ -191,8 +191,9 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, struct task_struct *me = current; frame = (struct rt_sigframe __user *) - round_down(stack_top - sizeof(struct rt_sigframe), 16) - 8; - frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128); + round_down(stack_top - sizeof(struct rt_sigframe), 16); + /* Subtract 128 for a red zone and 8 for proper alignment */ + frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8); if (!access_ok(VERIFY_WRITE, fp, sizeof(struct _fpstate))) goto out; -- cgit v1.2.3