43 asmlinkage void unhandled_exception(struct pt_regs *regs, int ea, int vector);
44 asmlinkage void do_trap(struct pt_regs *regs, unsigned long address);
45 asmlinkage void do_fpe_trap(struct pt_regs *regs, unsigned long address);
46 asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address);
47 asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address);
48 asmlinkage void do_illegal_instruction(struct pt_regs *regs,
77 void show_registers(struct pt_regs *regs)  in show_registers()  argument
83 	esp = (unsigned long)(regs->sp);  in show_registers()
84 	if (user_mode(regs))  in show_registers()
89 		smp_processor_id(), regs->pc, regs->sr, regs->sp);  in show_registers()
91 		0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);  in show_registers()
93 		regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);  in show_registers()
95 		regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);  in show_registers()
97 		regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);  in show_registers()
99 		regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);  in show_registers()
101 		regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);  in show_registers()
103 		regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);  in show_registers()
105 		regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);  in show_registers()
107 		regs->gpr[11], regs->orig_gpr11);  in show_registers()
137 		if (regs->pc < PAGE_OFFSET)  in show_registers()
143 			if (__get_user(word, &((unsigned long *)regs->pc)[i])) {  in show_registers()
149 			print_data(regs->pc, word, i);  in show_registers()
156 void __noreturn die(const char *str, struct pt_regs *regs, long err)  in die()  argument
161 	show_registers(regs);  in die()
174 asmlinkage void unhandled_exception(struct pt_regs *regs, int ea, int vector)  in unhandled_exception()  argument
178 	die("Oops", regs, 9);  in unhandled_exception()
181 asmlinkage void do_fpe_trap(struct pt_regs *regs, unsigned long address)  in do_fpe_trap()  argument
183 	if (user_mode(regs)) {  in do_fpe_trap()
206 		force_sig_fault(SIGFPE, code, (void __user *)regs->pc);  in do_fpe_trap()
208 		pr_emerg("KERNEL: Illegal fpe exception 0x%.8lx\n", regs->pc);  in do_fpe_trap()
209 		die("Die:", regs, SIGFPE);  in do_fpe_trap()
213 asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)  in do_trap()  argument
215 	if (user_mode(regs)) {  in do_trap()
216 		force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc);  in do_trap()
218 		pr_emerg("KERNEL: Illegal trap exception 0x%.8lx\n", regs->pc);  in do_trap()
219 		die("Die:", regs, SIGILL);  in do_trap()
223 asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)  in do_unaligned_access()  argument
225 	if (user_mode(regs)) {  in do_unaligned_access()
230 		die("Die:", regs, address);  in do_unaligned_access()
235 asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)  in do_bus_fault()  argument
237 	if (user_mode(regs)) {  in do_bus_fault()
242 		die("Die:", regs, address);  in do_bus_fault()
246 static inline int in_delay_slot(struct pt_regs *regs)  in in_delay_slot()  argument
252 	insn = *((unsigned int *)regs->pc);  in in_delay_slot()
270 static inline void adjust_pc(struct pt_regs *regs, unsigned long address)  in adjust_pc()  argument
275 	if (unlikely(in_delay_slot(regs))) {  in adjust_pc()
277 		jmp = *((unsigned int *)regs->pc);  in adjust_pc()
285 			regs->pc += displacement;  in adjust_pc()
288 			regs->pc += displacement;  in adjust_pc()
289 			regs->gpr[9] = regs->pc + 8;  in adjust_pc()
292 			if (regs->sr & SPR_SR_F)  in adjust_pc()
293 				regs->pc += 8;  in adjust_pc()
295 				regs->pc += displacement;  in adjust_pc()
298 			if (regs->sr & SPR_SR_F)  in adjust_pc()
299 				regs->pc += displacement;  in adjust_pc()
301 				regs->pc += 8;  in adjust_pc()
304 			regs->pc = regs->gpr[rb];  in adjust_pc()
307 			regs->pc = regs->gpr[rb];  in adjust_pc()
308 			regs->gpr[9] = regs->pc + 8;  in adjust_pc()
314 		regs->pc += 4;  in adjust_pc()
318 static inline void simulate_lwa(struct pt_regs *regs, unsigned long address,  in simulate_lwa()  argument
328 	orig_pc = regs->pc;  in simulate_lwa()
329 	adjust_pc(regs, address);  in simulate_lwa()
334 	lwa_addr = (unsigned long __user *)(regs->gpr[ra] + imm);  in simulate_lwa()
337 		do_unaligned_access(regs, address);  in simulate_lwa()
342 		if (user_mode(regs)) {  in simulate_lwa()
348 			regs->pc = entry->fixup;  in simulate_lwa()
357 	regs->gpr[rd] = value;  in simulate_lwa()
360 static inline void simulate_swa(struct pt_regs *regs, unsigned long address,  in simulate_swa()  argument
370 	orig_pc = regs->pc;  in simulate_swa()
371 	adjust_pc(regs, address);  in simulate_swa()
376 	vaddr = (unsigned long __user *)(regs->gpr[ra] + imm);  in simulate_swa()
379 		regs->sr &= ~SPR_SR_F;  in simulate_swa()
384 		do_unaligned_access(regs, address);  in simulate_swa()
388 	if (put_user(regs->gpr[rb], vaddr)) {  in simulate_swa()
389 		if (user_mode(regs)) {  in simulate_swa()
395 			regs->pc = entry->fixup;  in simulate_swa()
400 		*((unsigned long *)vaddr) = regs->gpr[rb];  in simulate_swa()
404 	regs->sr |= SPR_SR_F;  in simulate_swa()
410 asmlinkage void do_illegal_instruction(struct pt_regs *regs,  in do_illegal_instruction()  argument
420 		simulate_lwa(regs, address, insn);  in do_illegal_instruction()
424 		simulate_swa(regs, address, insn);  in do_illegal_instruction()
431 	if (user_mode(regs)) {  in do_illegal_instruction()
437 		die("Die:", regs, address);  in do_illegal_instruction()