#define task_regs(task) ((struct pt_regs *) ((char *)(task) + TASK_REGS))
-struct task_struct;
#define arch_has_single_step() 1
-void user_disable_single_step(struct task_struct *task);
-void user_enable_single_step(struct task_struct *task);
-
#define arch_has_block_step() 1
-void user_enable_block_step(struct task_struct *task);
/* XXX should we use iaoq[1] or iaoq[0] ? */
#define user_mode(regs) (((regs)->iaoq[0] & 3) ? 1 : 0)