ELF_T_PHDR
fsz = elf64_fsize(ELF_T_PHDR, (size_t) 1, EV_CURRENT);
[ELF_T_PHDR] = { .tof32 = NULL, .tom32 = NULL, .tof64 = NULL,
[ELF_T_PHDR] = { .msz64 = sizeof(Elf64_Phdr) },
[ELF_T_PHDR] = { .fsz64 = sizeof(Elf64_Word)+sizeof(Elf64_Word)