223 static void enable_singlestep(struct kprobe_ctlblk *kcb,  in enable_singlestep()  argument
235 	__ctl_store(kcb->kprobe_saved_ctl, 9, 11);  in enable_singlestep()
236 	kcb->kprobe_saved_imask = regs->psw.mask &  in enable_singlestep()
247 static void disable_singlestep(struct kprobe_ctlblk *kcb,  in disable_singlestep()  argument
252 	__ctl_load(kcb->kprobe_saved_ctl, 9, 11);  in disable_singlestep()
254 	regs->psw.mask |= kcb->kprobe_saved_imask;  in disable_singlestep()
264 static void push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)  in push_kprobe()  argument
266 	kcb->prev_kprobe.kp = __this_cpu_read(current_kprobe);  in push_kprobe()
267 	kcb->prev_kprobe.status = kcb->kprobe_status;  in push_kprobe()
277 static void pop_kprobe(struct kprobe_ctlblk *kcb)  in pop_kprobe()  argument
279 	__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);  in pop_kprobe()
280 	kcb->kprobe_status = kcb->prev_kprobe.status;  in pop_kprobe()
281 	kcb->prev_kprobe.kp = NULL;  in pop_kprobe()
285 static void kprobe_reenter_check(struct kprobe_ctlblk *kcb, struct kprobe *p)  in kprobe_reenter_check()  argument
287 	switch (kcb->kprobe_status) {  in kprobe_reenter_check()
309 	struct kprobe_ctlblk *kcb;  in kprobe_handler()  local
318 	kcb = get_kprobe_ctlblk();  in kprobe_handler()
332 			kprobe_reenter_check(kcb, p);  in kprobe_handler()
333 			push_kprobe(kcb, p);  in kprobe_handler()
334 			kcb->kprobe_status = KPROBE_REENTER;  in kprobe_handler()
343 			push_kprobe(kcb, p);  in kprobe_handler()
344 			kcb->kprobe_status = KPROBE_HIT_ACTIVE;  in kprobe_handler()
346 				pop_kprobe(kcb);  in kprobe_handler()
350 			kcb->kprobe_status = KPROBE_HIT_SS;  in kprobe_handler()
352 		enable_singlestep(kcb, regs, (unsigned long) p->ainsn.insn);  in kprobe_handler()
375 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in resume_execution()  local
394 	disable_singlestep(kcb, regs, ip);  in resume_execution()
400 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in post_kprobe_handler()  local
407 	if (kcb->kprobe_status != KPROBE_REENTER && p->post_handler) {  in post_kprobe_handler()
408 		kcb->kprobe_status = KPROBE_HIT_SSDONE;  in post_kprobe_handler()
411 	pop_kprobe(kcb);  in post_kprobe_handler()
428 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in kprobe_trap_handler()  local
431 	switch(kcb->kprobe_status) {  in kprobe_trap_handler()
441 		disable_singlestep(kcb, regs, (unsigned long) p->addr);  in kprobe_trap_handler()
442 		pop_kprobe(kcb);  in kprobe_trap_handler()