234 static void set_current_kprobe(struct kprobe *p, struct pt_regs *regs,  in set_current_kprobe()  argument
238 	kcb->kprobe_saved_SR = kcb->kprobe_old_SR = (regs->cp0_status & ST0_IE);  in set_current_kprobe()
239 	kcb->kprobe_saved_epc = regs->cp0_epc;  in set_current_kprobe()
255 static int evaluate_branch_instruction(struct kprobe *p, struct pt_regs *regs,  in evaluate_branch_instruction()  argument
262 	epc = regs->cp0_epc;  in evaluate_branch_instruction()
271 	ret = __compute_return_epc_for_insn(regs, insn);  in evaluate_branch_instruction()
278 	kcb->target_epc = regs->cp0_epc;  in evaluate_branch_instruction()
289 static void prepare_singlestep(struct kprobe *p, struct pt_regs *regs,  in prepare_singlestep()  argument
294 	regs->cp0_status &= ~ST0_IE;  in prepare_singlestep()
299 		regs->cp0_epc = (unsigned long)p->addr;  in prepare_singlestep()
301 		ret = evaluate_branch_instruction(p, regs, kcb);  in prepare_singlestep()
307 	regs->cp0_epc = (unsigned long)&p->ainsn.insn[0];  in prepare_singlestep()
323 				       struct pt_regs *regs,  in resume_execution()  argument
327 		regs->cp0_epc = kcb->target_epc;  in resume_execution()
330 		regs->cp0_epc = orig_epc + 4;  in resume_execution()
334 static int __kprobes kprobe_handler(struct pt_regs *regs)  in kprobe_handler()  argument
341 	addr = (kprobe_opcode_t *) regs->cp0_epc;  in kprobe_handler()
356 				regs->cp0_status &= ~ST0_IE;  in kprobe_handler()
357 				regs->cp0_status |= kcb->kprobe_saved_SR;  in kprobe_handler()
368 			set_current_kprobe(p, regs, kcb);  in kprobe_handler()
370 			prepare_singlestep(p, regs, kcb);  in kprobe_handler()
373 				resume_execution(p, regs, kcb);  in kprobe_handler()
389 			if (p->break_handler && p->break_handler(p, regs))  in kprobe_handler()
411 	set_current_kprobe(p, regs, kcb);  in kprobe_handler()
414 	if (p->pre_handler && p->pre_handler(p, regs)) {  in kprobe_handler()
420 	prepare_singlestep(p, regs, kcb);  in kprobe_handler()
424 			p->post_handler(p, regs, 0);  in kprobe_handler()
425 		resume_execution(p, regs, kcb);  in kprobe_handler()
438 static inline int post_kprobe_handler(struct pt_regs *regs)  in post_kprobe_handler()  argument
448 		cur->post_handler(cur, regs, 0);  in post_kprobe_handler()
451 	resume_execution(cur, regs, kcb);  in post_kprobe_handler()
453 	regs->cp0_status |= kcb->kprobe_saved_SR;  in post_kprobe_handler()
467 static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)  in kprobe_fault_handler()  argument
472 	if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))  in kprobe_fault_handler()
476 		resume_execution(cur, regs, kcb);  in kprobe_fault_handler()
477 		regs->cp0_status |= kcb->kprobe_old_SR;  in kprobe_fault_handler()
497 		if (kprobe_handler(args->regs))  in kprobe_exceptions_notify()
501 		if (post_kprobe_handler(args->regs))  in kprobe_exceptions_notify()
510 		    && kprobe_fault_handler(args->regs, args->trapnr))  in kprobe_exceptions_notify()
520 int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)  in setjmp_pre_handler()  argument
525 	kcb->jprobe_saved_regs = *regs;  in setjmp_pre_handler()
526 	kcb->jprobe_saved_sp = regs->regs[29];  in setjmp_pre_handler()
531 	regs->cp0_epc = (unsigned long)(jp->entry);  in setjmp_pre_handler()
549 int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)  in longjmp_break_handler()  argument
553 	if (regs->cp0_epc >= (unsigned long)jprobe_return &&  in longjmp_break_handler()
554 	    regs->cp0_epc <= (unsigned long)jprobe_return_end) {  in longjmp_break_handler()
555 		*regs = kcb->jprobe_saved_regs;  in longjmp_break_handler()
588 				      struct pt_regs *regs)  in arch_prepare_kretprobe()  argument
590 	ri->ret_addr = (kprobe_opcode_t *) regs->regs[31];  in arch_prepare_kretprobe()
593 	regs->regs[31] = (unsigned long)kretprobe_trampoline;  in arch_prepare_kretprobe()
600 						struct pt_regs *regs)  in trampoline_probe_handler()  argument
630 			ri->rp->handler(ri, regs);  in trampoline_probe_handler()
645 	instruction_pointer(regs) = orig_ret_address;  in trampoline_probe_handler()