from pathlib import Path


def u16(data, off):
    return data[off] | (data[off + 1] << 8)


def u32(data, off):
    return u16(data, off) | (u16(data, off + 2) << 16)


def main():
    data = Path(r'd:\Ghidra\Crusader\REGRET.EXE').read_bytes()
    ne_off = u32(data, 0x3C)
    seg_table_off = ne_off + u16(data, ne_off + 0x22)
    align_shift = u16(data, ne_off + 0x32)
    seg_index = ((0x13F8 - 0x1000) // 8) + 1
    seg_entry_off = seg_table_off + (seg_index - 1) * 8
    seg_base = u16(data, seg_entry_off) << align_shift
    seg_len = u16(data, seg_entry_off + 2) or 0x10000
    reloc_off = seg_base + seg_len
    reloc_count = u16(data, reloc_off)

    print(f'segment 13F8 base=0x{seg_base:X} reloc=0x{reloc_off:X} count={reloc_count}')
    pos = reloc_off + 2
    for _ in range(reloc_count):
        src = u16(data, pos + 2)
        if 0x20DD <= src <= 0x2157:
            print(f'rec@0x{pos:X} src=0x{src:04X} bytes={data[pos:pos+8].hex(" ")}')
        pos += 8


if __name__ == '__main__':
    main()