__kprobes ia64_bad_break()

in kernel/traps.c [101:180]

• 65 lines of code
• 20 McCabe index (conditional complexity)

__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
{
	int sig, code;

	switch (break_num) {
	      case 0: /* unknown error (used by GCC for __builtin_abort()) */
		if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
			       	== NOTIFY_STOP)
			return;
		if (die_if_kernel("bugcheck!", regs, break_num))
			return;
		sig = SIGILL; code = ILL_ILLOPC;
		break;

	      case 1: /* integer divide by zero */
		sig = SIGFPE; code = FPE_INTDIV;
		break;

	      case 2: /* integer overflow */
		sig = SIGFPE; code = FPE_INTOVF;
		break;

	      case 3: /* range check/bounds check */
		sig = SIGFPE; code = FPE_FLTSUB;
		break;

	      case 4: /* null pointer dereference */
		sig = SIGSEGV; code = SEGV_MAPERR;
		break;

	      case 5: /* misaligned data */
		sig = SIGSEGV; code = BUS_ADRALN;
		break;

	      case 6: /* decimal overflow */
		sig = SIGFPE; code = __FPE_DECOVF;
		break;

	      case 7: /* decimal divide by zero */
		sig = SIGFPE; code = __FPE_DECDIV;
		break;

	      case 8: /* packed decimal error */
		sig = SIGFPE; code = __FPE_DECERR;
		break;

	      case 9: /* invalid ASCII digit */
		sig = SIGFPE; code = __FPE_INVASC;
		break;

	      case 10: /* invalid decimal digit */
		sig = SIGFPE; code = __FPE_INVDEC;
		break;

	      case 11: /* paragraph stack overflow */
		sig = SIGSEGV; code = __SEGV_PSTKOVF;
		break;

	      case 0x3f000 ... 0x3ffff:	/* bundle-update in progress */
		sig = SIGILL; code = __ILL_BNDMOD;
		break;

	      default:
		if ((break_num < 0x40000 || break_num > 0x100000)
		    && die_if_kernel("Bad break", regs, break_num))
			return;

		if (break_num < 0x80000) {
			sig = SIGILL; code = __ILL_BREAK;
		} else {
			if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP)
					== NOTIFY_STOP)
				return;
			sig = SIGTRAP; code = TRAP_BRKPT;
		}
	}
	force_sig_fault(sig, code,
			(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
			break_num, 0 /* clear __ISR_VALID */, 0);
}