el_t2_frame_header
struct el_t2_frame_header elcm_hdr; /* ID$MEM-FERR = 0x08 */
struct el_t2_frame_header elct_hdr; /* ID$T2-FRAME */
struct el_t2_frame_header elfmc_header; /* ID$P-FRAME_MCHECK */
struct el_t2_frame_header elfmc_footer; /* empty */
struct el_t2_frame_header elfcc_header; /* ID$P-BC-COR */
struct el_t2_frame_header elfcc_footer; /* empty */