static void handle_break()

in kernel/traps.c [283:324]

• 34 lines of code
• 9 McCabe index (conditional complexity)

static void handle_break(struct pt_regs *regs)
{
	unsigned iir = regs->iir;

	if (unlikely(iir == PARISC_BUG_BREAK_INSN && !user_mode(regs))) {
		/* check if a BUG() or WARN() trapped here.  */
		enum bug_trap_type tt;
		tt = report_bug(regs->iaoq[0] & ~3, regs);
		if (tt == BUG_TRAP_TYPE_WARN) {
			regs->iaoq[0] += 4;
			regs->iaoq[1] += 4;
			return; /* return to next instruction when WARN_ON().  */
		}
		die_if_kernel("Unknown kernel breakpoint", regs,
			(tt == BUG_TRAP_TYPE_NONE) ? 9 : 0);
	}

#ifdef CONFIG_KPROBES
	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN)) {
		parisc_kprobe_break_handler(regs);
		return;
	}

#endif

#ifdef CONFIG_KGDB
	if (unlikely(iir == PARISC_KGDB_COMPILED_BREAK_INSN ||
		iir == PARISC_KGDB_BREAK_INSN)) {
		kgdb_handle_exception(9, SIGTRAP, 0, regs);
		return;
	}
#endif

	if (unlikely(iir != GDB_BREAK_INSN))
		parisc_printk_ratelimited(0, regs,
			KERN_DEBUG "break %d,%d: pid=%d command='%s'\n",
			iir & 31, (iir>>13) & ((1<<13)-1),
			task_pid_nr(current), current->comm);

	/* send standard GDB signal */
	handle_gdb_break(regs, TRAP_BRKPT);
}