elf64_exec
rval = elf64_exec(fd, &hdr.elf64, &entry, &ssym, &esym);
int elf64_exec(int, Elf64_Ehdr *, u_int64_t *, void **, void **);
rval = elf64_exec(fd, &hdr.elf64, marks, flags);
int elf64_exec(int, Elf64_Ehdr *, uint64_t *, int);
static int elf64_exec(gzFile, Elf64_Ehdr *, u_long *, int);
r = elf64_exec(fp, &hdr.elf64, marks, LOAD_ALL);