200 static void enable_singlestep(struct kprobe_ctlblk *kcb,  in enable_singlestep()  argument
212 	__ctl_store(kcb->kprobe_saved_ctl, 9, 11);  in enable_singlestep()
213 	kcb->kprobe_saved_imask = regs->psw.mask &  in enable_singlestep()
224 static void disable_singlestep(struct kprobe_ctlblk *kcb,  in disable_singlestep()  argument
229 	__ctl_load(kcb->kprobe_saved_ctl, 9, 11);  in disable_singlestep()
231 	regs->psw.mask |= kcb->kprobe_saved_imask;  in disable_singlestep()
241 static void push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)  in push_kprobe()  argument
243 	kcb->prev_kprobe.kp = __this_cpu_read(current_kprobe);  in push_kprobe()
244 	kcb->prev_kprobe.status = kcb->kprobe_status;  in push_kprobe()
254 static void pop_kprobe(struct kprobe_ctlblk *kcb)  in pop_kprobe()  argument
256 	__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);  in pop_kprobe()
257 	kcb->kprobe_status = kcb->prev_kprobe.status;  in pop_kprobe()
270 static void kprobe_reenter_check(struct kprobe_ctlblk *kcb, struct kprobe *p)  in kprobe_reenter_check()  argument
272 	switch (kcb->kprobe_status) {  in kprobe_reenter_check()
294 	struct kprobe_ctlblk *kcb;  in kprobe_handler()  local
303 	kcb = get_kprobe_ctlblk();  in kprobe_handler()
317 			kprobe_reenter_check(kcb, p);  in kprobe_handler()
318 			push_kprobe(kcb, p);  in kprobe_handler()
319 			kcb->kprobe_status = KPROBE_REENTER;  in kprobe_handler()
328 			push_kprobe(kcb, p);  in kprobe_handler()
329 			kcb->kprobe_status = KPROBE_HIT_ACTIVE;  in kprobe_handler()
331 				pop_kprobe(kcb);  in kprobe_handler()
335 			kcb->kprobe_status = KPROBE_HIT_SS;  in kprobe_handler()
337 		enable_singlestep(kcb, regs, (unsigned long) p->ainsn.insn);  in kprobe_handler()
463 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in resume_execution()  local
500 	disable_singlestep(kcb, regs, ip);  in resume_execution()
506 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in post_kprobe_handler()  local
512 	if (kcb->kprobe_status != KPROBE_REENTER && p->post_handler) {  in post_kprobe_handler()
513 		kcb->kprobe_status = KPROBE_HIT_SSDONE;  in post_kprobe_handler()
518 	pop_kprobe(kcb);  in post_kprobe_handler()
535 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();  in kprobe_trap_handler()  local
539 	switch(kcb->kprobe_status) {  in kprobe_trap_handler()
549 		disable_singlestep(kcb, regs, (unsigned long) p->addr);  in kprobe_trap_handler()
550 		pop_kprobe(kcb);  in kprobe_trap_handler()