static long ptrace_gethbpregs()

in kernel/ptrace.c [416:448]

• 28 lines of code
• 12 McCabe index (conditional complexity)

static long ptrace_gethbpregs(struct task_struct *child, long addr,
			      long __user *datap)
{
	struct perf_event *bp;
	u32 user_data[2] = {0};
	bool dbreak = addr & 1;
	unsigned idx = addr >> 1;

	if ((!dbreak && idx >= XCHAL_NUM_IBREAK) ||
	    (dbreak && idx >= XCHAL_NUM_DBREAK))
		return -EINVAL;

	if (dbreak)
		bp = child->thread.ptrace_wp[idx];
	else
		bp = child->thread.ptrace_bp[idx];

	if (bp) {
		user_data[0] = bp->attr.bp_addr;
		user_data[1] = bp->attr.disabled ? 0 : bp->attr.bp_len;
		if (dbreak) {
			if (bp->attr.bp_type & HW_BREAKPOINT_R)
				user_data[1] |= DBREAKC_LOAD_MASK;
			if (bp->attr.bp_type & HW_BREAKPOINT_W)
				user_data[1] |= DBREAKC_STOR_MASK;
		}
	}

	if (copy_to_user(datap, user_data, sizeof(user_data)))
		return -EFAULT;

	return 0;
}