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Diffstat (limited to 'arch/arm64/kernel/signal.c')
-rw-r--r--arch/arm64/kernel/signal.c17
1 files changed, 2 insertions, 15 deletions
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index abd756315cb5..890a591f75dd 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -149,8 +149,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigframe(regs, frame))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack,
- NULL, regs->sp) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->regs[0];
@@ -164,12 +163,6 @@ badframe:
return 0;
}
-asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- unsigned long sp)
-{
- return do_sigaltstack(uss, uoss, sp);
-}
-
static int setup_sigframe(struct rt_sigframe __user *sf,
struct pt_regs *regs, sigset_t *set)
{
@@ -250,7 +243,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
- stack_t stack;
int err = 0;
frame = get_sigframe(ka, regs);
@@ -260,12 +252,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
__put_user_error(0, &frame->uc.uc_flags, err);
__put_user_error(NULL, &frame->uc.uc_link, err);
- memset(&stack, 0, sizeof(stack));
- stack.ss_sp = (void __user *)current->sas_ss_sp;
- stack.ss_flags = sas_ss_flags(regs->sp);
- stack.ss_size = current->sas_ss_size;
- err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
-
+ err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
err |= setup_sigframe(frame, regs, set);
if (err == 0) {
setup_return(regs, ka, frame, usig);