56 extern void xmon(struct pt_regs *regs);
57 extern int xmon_bpt(struct pt_regs *regs);
58 extern int xmon_sstep(struct pt_regs *regs);
59 extern int xmon_iabr_match(struct pt_regs *regs);
60 extern int xmon_dabr_match(struct pt_regs *regs);
61 extern void (*xmon_fault_handler)(struct pt_regs *regs);
65 void (*debugger)(struct pt_regs *regs) = xmon;
66 int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt;
67 int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep;
68 int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match;
69 int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match;
70 void (*debugger_fault_handler)(struct pt_regs *regs);
73 void (*debugger)(struct pt_regs *regs);
74 int (*debugger_bpt)(struct pt_regs *regs);
75 int (*debugger_sstep)(struct pt_regs *regs);
76 int (*debugger_iabr_match)(struct pt_regs *regs);
77 int (*debugger_dabr_match)(struct pt_regs *regs);
78 void (*debugger_fault_handler)(struct pt_regs *regs);
81 void (*debugger)(struct pt_regs *regs);
82 int (*debugger_bpt)(struct pt_regs *regs);
83 int (*debugger_sstep)(struct pt_regs *regs);
84 int (*debugger_iabr_match)(struct pt_regs *regs);
85 int (*debugger_dabr_match)(struct pt_regs *regs);
86 void (*debugger_fault_handler)(struct pt_regs *regs);
101 _exception(int signr, siginfo_t *info, struct pt_regs *regs)  in _exception()  argument
103 	if (!user_mode(regs))  in _exception()
105 		show_regs(regs);  in _exception()
107 		debugger(regs);  in _exception()
109 		print_backtrace((unsigned long *)regs->gpr[1]);  in _exception()
110 		panic("Exception in kernel pc %lx signal %d",regs->nip,signr);  in _exception()
115 			debugger(regs);  in _exception()
126 static struct rtas_error_log *FWNMI_get_errinfo(struct pt_regs *regs)  in FWNMI_get_errinfo()  argument
128 	unsigned long errdata = regs->gpr[3];  in FWNMI_get_errinfo()
135 		regs->gpr[3] = savep[0];	/* restore original r3 */  in FWNMI_get_errinfo()
157 SystemResetException(struct pt_regs *regs)  in SystemResetException()  argument
162 		unsigned long *r3 = __va(regs->gpr[3]); /* for FWNMI debug */  in SystemResetException()
167 	xmon(regs);  in SystemResetException()
172 	kdb_reset_debugger(regs);  in SystemResetException()
185 static int recover_mce(struct pt_regs *regs, struct rtas_error_log *errp)  in recover_mce()  argument
194 	} else if ((regs->msr & MSR_RI) &&  in recover_mce()
195 		   user_mode(regs) &&  in recover_mce()
209 		info.si_addr = (void *)regs->nip;  in recover_mce()
210 		_exception(SIGBUS, &info, regs);  in recover_mce()
233 MachineCheckException(struct pt_regs *regs)  in MachineCheckException()  argument
238 		errp = FWNMI_get_errinfo(regs);  in MachineCheckException()
240 		if (errp && recover_mce(regs, errp))  in MachineCheckException()
244 		unsigned long long srr1 = regs->msr;  in MachineCheckException()
261 		debugger_fault_handler(regs);  in MachineCheckException()
266 	printk(KERN_EMERG "Caused by (from SRR1=%lx): ", regs->msr);  in MachineCheckException()
267 	show_regs(regs);  in MachineCheckException()
269 	debugger(regs);  in MachineCheckException()
271 	print_backtrace((unsigned long *)regs->gpr[1]);  in MachineCheckException()
276 SMIException(struct pt_regs *regs)  in SMIException()  argument
280 		debugger(regs);  in SMIException()
284 	show_regs(regs);  in SMIException()
285 	print_backtrace((unsigned long *)regs->gpr[1]);  in SMIException()
290 UnknownException(struct pt_regs *regs)  in UnknownException()  argument
295 	       regs->nip, regs->msr, regs->trap);  in UnknownException()
301 	_exception(SIGTRAP, &info, regs);	  in UnknownException()
305 InstructionBreakpointException(struct pt_regs *regs)  in InstructionBreakpointException()  argument
310 	if (debugger_iabr_match(regs))  in InstructionBreakpointException()
316 	info.si_addr = (void *)regs->nip;  in InstructionBreakpointException()
317 	_exception(SIGTRAP, &info, regs);  in InstructionBreakpointException()
321 parse_fpe(siginfo_t *info, struct pt_regs *regs)  in parse_fpe()  argument
325 	if (regs->msr & MSR_FP)  in parse_fpe()
355 	info->si_addr = (void *)regs->nip;  in parse_fpe()
356 	_exception(SIGFPE, info, regs);  in parse_fpe()
360 void IllegalAltiVecInstruction(struct pt_regs *regs)  in IllegalAltiVecInstruction()  argument
367 	info.si_addr = (void *)regs->nip;  in IllegalAltiVecInstruction()
368 	_exception(SIGILL, &info, regs);  in IllegalAltiVecInstruction()
373 ProgramCheckException(struct pt_regs *regs)  in ProgramCheckException()  argument
377 	if (regs->msr & 0x100000) {  in ProgramCheckException()
380 		parse_fpe(&info, regs);  in ProgramCheckException()
381 	} else if (regs->msr & 0x40000) {  in ProgramCheckException()
387 		info.si_addr = (void *)regs->nip;  in ProgramCheckException()
388 		_exception(SIGILL, &info, regs);  in ProgramCheckException()
389 	} else if (regs->msr & 0x20000) {  in ProgramCheckException()
393 		if (debugger_bpt(regs))  in ProgramCheckException()
399 		info.si_addr = (void *)regs->nip;  in ProgramCheckException()
400 		_exception(SIGTRAP, &info, regs);  in ProgramCheckException()
407 		info.si_addr = (void *)regs->nip;  in ProgramCheckException()
408 		_exception(SIGILL, &info, regs);  in ProgramCheckException()
413 KernelFPUnavailableException(struct pt_regs *regs)  in KernelFPUnavailableException()  argument
416 		current, regs->nip, regs->trap);  in KernelFPUnavailableException()
422 KernelAltiVecUnavailableException(struct pt_regs *regs)  in KernelAltiVecUnavailableException()  argument
425 		(unsigned long)current, regs->nip, (unsigned int)regs->trap);  in KernelAltiVecUnavailableException()
430 AltiVecAssistException(struct pt_regs *regs)  in AltiVecAssistException()  argument
438 	if (regs->msr & MSR_VEC)  in AltiVecAssistException()
451 	_exception(SIGTRAP, &info, regs);  in AltiVecAssistException()
456 ThermalInterrupt(struct pt_regs *regs)  in ThermalInterrupt()  argument
462 SingleStepException(struct pt_regs *regs)  in SingleStepException()  argument
466 	regs->msr &= ~MSR_SE;  /* Turn off 'trace' bit */  in SingleStepException()
469 	if (debugger_sstep(regs))  in SingleStepException()
475 	info.si_addr = (void *)regs->nip;  in SingleStepException()
476 	_exception(SIGTRAP, &info, regs);	  in SingleStepException()
480 AlignmentException(struct pt_regs *regs)  in AlignmentException()  argument
485 	fixed = fix_alignment(regs);  in AlignmentException()
488 			if (!user_mode(regs))  in AlignmentException()
489 				PPCDBG(PPCDBG_ALIGNFIXUP, "fix alignment at %lx\n", regs->nip);  in AlignmentException()
490 		regs->nip += 4;	/* skip over emulated instruction */  in AlignmentException()
496 		if (user_mode(regs)) {  in AlignmentException()
500 			info.si_addr = (void *)regs->dar;  in AlignmentException()
504 			bad_page_fault(regs, regs->dar);  in AlignmentException()
513 	info.si_addr = (void *)regs->nip;  in AlignmentException()
514 	_exception(SIGBUS, &info, regs);  in AlignmentException()