+/**
+ * Probe PXE image (with rejection of potential EFI images)
+ *
+ * @v image PXE file
+ * @ret rc Return status code
+ */
+int pxe_probe_no_mz ( struct image *image ) {
+ uint16_t magic;
+ int rc;
+
+ /* Probe PXE image */
+ if ( ( rc = pxe_probe ( image ) ) != 0 )
+ return rc;
+
+ /* Reject image with an "MZ" signature which may indicate an
+ * EFI image incorrectly handed out to a BIOS system.
+ */
+ if ( image->len >= sizeof ( magic ) ) {
+ copy_from_user ( &magic, image->data, 0, sizeof ( magic ) );
+ if ( magic == cpu_to_le16 ( EFI_IMAGE_DOS_SIGNATURE ) ) {
+ DBGC ( image, "IMAGE %p may be an EFI image\n",
+ image );
+ return -ENOTTY;
+ }
+ }
+
+ return 0;
+}
+