gdbindex_64
hdr->dg_entry_length = 2*sizeof(gdbindex_64) +
2*sizeof(gdbindex_64),
sizeof(gdbindex_64),
3*sizeof(gdbindex_64),
sizeof(gdbindex_64),
3*sizeof(gdbindex_64),
sizeof(gdbindex_64),
sizeof(gdbindex_64));
base+ (1*sizeof(gdbindex_64)),
sizeof(gdbindex_64));
base+ (2*sizeof(gdbindex_64)),
gdbindex_64 offset;
gdbindex_64 length;