dump_header
dump_header(r, magic, &ofs, 0);
dump_header(r, magic, &ofs, df->df_num_entries);
struct dump_header *d_hdr;
sizeof(struct dump_header);
d_hdr->header_size = (sizeof(struct dump_header) >> 2) - 1;
buf += sizeof(struct dump_header);
sizeof(struct dump_header);
sizeof(struct dump_header);
+ sizeof(struct dump_header);
dump_header(&hdr);