uprobe_single_step_handler
int uprobe_single_step_handler(struct pt_regs *regs, unsigned long esr);
if (uprobe_single_step_handler(regs, esr) == DBG_HOOK_HANDLED)
int uprobe_single_step_handler(struct pt_regs *regs);
if (uprobe_single_step_handler(regs))
bool uprobe_single_step_handler(struct pt_regs *regs);
return user ? uprobe_single_step_handler(regs) : kprobe_single_step_handler(regs);