78 int arch_prepare_kprobe(struct kprobe *p)  in arch_prepare_kprobe()  argument
84 	insn = p->addr[0];  in arch_prepare_kprobe()
92 	if (copy_from_kernel_nofault(&prev_insn, p->addr - 1,  in arch_prepare_kprobe()
107 	p->ainsn.insn = get_insn_slot();  in arch_prepare_kprobe()
108 	if (!p->ainsn.insn) {  in arch_prepare_kprobe()
127 		memcpy(&p->ainsn.insn[0], p->addr + 1, sizeof(kprobe_opcode_t));  in arch_prepare_kprobe()
129 		memcpy(&p->ainsn.insn[0], p->addr, sizeof(kprobe_opcode_t));  in arch_prepare_kprobe()
131 	p->ainsn.insn[1] = breakpoint2_insn;  in arch_prepare_kprobe()
132 	p->opcode = *p->addr;  in arch_prepare_kprobe()
139 void arch_arm_kprobe(struct kprobe *p)  in arch_arm_kprobe()  argument
141 	*p->addr = breakpoint_insn;  in arch_arm_kprobe()
142 	flush_insn_slot(p);  in arch_arm_kprobe()
146 void arch_disarm_kprobe(struct kprobe *p)  in arch_disarm_kprobe()  argument
148 	*p->addr = p->opcode;  in arch_disarm_kprobe()
149 	flush_insn_slot(p);  in arch_disarm_kprobe()
153 void arch_remove_kprobe(struct kprobe *p)  in arch_remove_kprobe()  argument
155 	if (p->ainsn.insn) {  in arch_remove_kprobe()
156 		free_insn_slot(p->ainsn.insn, 0);  in arch_remove_kprobe()
157 		p->ainsn.insn = NULL;  in arch_remove_kprobe()
180 static void set_current_kprobe(struct kprobe *p, struct pt_regs *regs,  in set_current_kprobe()  argument
183 	__this_cpu_write(current_kprobe, p);  in set_current_kprobe()
201 static int evaluate_branch_instruction(struct kprobe *p, struct pt_regs *regs,  in evaluate_branch_instruction()  argument
204 	union mips_instruction insn = p->opcode;  in evaluate_branch_instruction()
212 	if (p->ainsn.insn->word == 0)  in evaluate_branch_instruction()
235 static void prepare_singlestep(struct kprobe *p, struct pt_regs *regs,  in prepare_singlestep()  argument
243 	if (p->opcode.word == breakpoint_insn.word ||  in prepare_singlestep()
244 	    p->opcode.word == breakpoint2_insn.word)  in prepare_singlestep()
245 		regs->cp0_epc = (unsigned long)p->addr;  in prepare_singlestep()
246 	else if (insn_has_delayslot(p->opcode)) {  in prepare_singlestep()
247 		ret = evaluate_branch_instruction(p, regs, kcb);  in prepare_singlestep()
251 	regs->cp0_epc = (unsigned long)&p->ainsn.insn[0];  in prepare_singlestep()
266 static void resume_execution(struct kprobe *p,  in resume_execution()  argument
270 	if (insn_has_delayslot(p->opcode))  in resume_execution()
281 	struct kprobe *p;  in kprobe_handler()  local
297 		p = get_kprobe(addr);  in kprobe_handler()
298 		if (p) {  in kprobe_handler()
300 			    p->ainsn.insn->word == breakpoint_insn.word) {  in kprobe_handler()
313 			set_current_kprobe(p, regs, kcb);  in kprobe_handler()
314 			kprobes_inc_nmissed_count(p);  in kprobe_handler()
315 			prepare_singlestep(p, regs, kcb);  in kprobe_handler()
318 				resume_execution(p, regs, kcb);  in kprobe_handler()
334 	p = get_kprobe(addr);  in kprobe_handler()
335 	if (!p) {  in kprobe_handler()
350 	set_current_kprobe(p, regs, kcb);  in kprobe_handler()
353 	if (p->pre_handler && p->pre_handler(p, regs)) {  in kprobe_handler()
360 	prepare_singlestep(p, regs, kcb);  in kprobe_handler()
363 		if (p->post_handler)  in kprobe_handler()
364 			p->post_handler(p, regs, 0);  in kprobe_handler()
365 		resume_execution(p, regs, kcb);  in kprobe_handler()
495 static int trampoline_probe_handler(struct kprobe *p,  in trampoline_probe_handler()  argument
508 int arch_trampoline_kprobe(struct kprobe *p)  in arch_trampoline_kprobe()  argument
510 	if (p->addr == (kprobe_opcode_t *)__kretprobe_trampoline)  in arch_trampoline_kprobe()