diff options
| author | Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> | 2008-10-23 17:15:28 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-27 14:14:02 +0100 |
| commit | fd4a2030a358b4818646031049d9631bd45b9915 (patch) | |
| tree | 88b28cac9e5f5bca0a0634ce77530a4c7cf80173 /arch/x86/kernel/signal_64.c | |
| parent | 709110bd5624094992579f5311541f2e2b7ce58a (diff) | |
x86: signal_64.c: get_stack() doesn't need entire regs
Impact: cleanup
get_stack() uses sp only, entire regs is not needed.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/signal_64.c')
| -rw-r--r-- | arch/x86/kernel/signal_64.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c index 9c469da7f9e..3d0deb33674 100644 --- a/arch/x86/kernel/signal_64.c +++ b/arch/x86/kernel/signal_64.c @@ -199,12 +199,10 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, */ static void __user * -get_stack(struct k_sigaction *ka, struct pt_regs *regs, unsigned long size) +get_stack(struct k_sigaction *ka, unsigned long sp, unsigned long size) { - unsigned long sp; - /* Default to using normal stack - redzone*/ - sp = regs->sp - 128; + sp -= 128; /* This is the X/Open sanctioned signal stack switching. */ if (ka->sa.sa_flags & SA_ONSTACK) { @@ -224,14 +222,14 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, struct task_struct *me = current; if (used_math()) { - fp = get_stack(ka, regs, sig_xstate_size); + fp = get_stack(ka, regs->sp, sig_xstate_size); frame = (void __user *)round_down( (unsigned long)fp - sizeof(struct rt_sigframe), 16) - 8; if (save_i387_xstate(fp) < 0) return -EFAULT; } else - frame = get_stack(ka, regs, sizeof(struct rt_sigframe)) - 8; + frame = get_stack(ka, regs->sp, sizeof(struct rt_sigframe)) - 8; if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) return -EFAULT; |