static int params_to_supp()

in tee_core.c [637:679]

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

static int params_to_supp(struct tee_context *ctx,
			  struct tee_ioctl_param __user *uparams,
			  size_t num_params, struct tee_param *params)
{
	size_t n;

	for (n = 0; n < num_params; n++) {
		struct tee_ioctl_param ip;
		struct tee_param *p = params + n;

		ip.attr = p->attr;
		switch (p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
			ip.a = p->u.value.a;
			ip.b = p->u.value.b;
			ip.c = p->u.value.c;
			break;
		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
			ip.b = p->u.memref.size;
			if (!p->u.memref.shm) {
				ip.a = 0;
				ip.c = (u64)-1; /* invalid shm id */
				break;
			}
			ip.a = p->u.memref.shm_offs;
			ip.c = p->u.memref.shm->id;
			break;
		default:
			ip.a = 0;
			ip.b = 0;
			ip.c = 0;
			break;
		}

		if (copy_to_user(uparams + n, &ip, sizeof(ip)))
			return -EFAULT;
	}

	return 0;
}