asmlinkage long sys_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss, unsigned long r5, unsigned long r6,
unsigned long r7, unsigned long r8, struct pt_regs *regs);
asmlinkage long sys_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss, unsigned long r5, unsigned long r6,
unsigned long r7, unsigned long r8, struct pt_regs *regs);