75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
#!/usr/bin/env python3
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from __future__ import annotations
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import argparse
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import hashlib
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import json
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import re
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import struct
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from pathlib import Path
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TABLE_BASE_VA = 0x00610398
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ROW_STRIDE = 0x6E
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ROW_COUNT = 520
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IMAGE_BASE = 0x00400000
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def load_lng_labels(path: Path) -> dict[int, str]:
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labels: dict[int, str] = {}
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for line in path.read_text(encoding="latin1").splitlines():
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match = re.match(r"\s*(\d+)\s+\"(.*)\"\s*$", line)
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if match:
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labels[int(match.group(1))] = match.group(2)
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return labels
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def extract_rows(exe_bytes: bytes, labels: dict[int, str]) -> list[dict[str, object]]:
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table_offset = TABLE_BASE_VA - IMAGE_BASE
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rows: list[dict[str, object]] = []
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for row_index in range(ROW_COUNT):
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row = exe_bytes[
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table_offset + row_index * ROW_STRIDE : table_offset + (row_index + 1) * ROW_STRIDE
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]
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if len(row) < ROW_STRIDE:
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break
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label_id = struct.unpack_from("<H", row, 0x6A)[0]
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rows.append(
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{
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"row_index": row_index,
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"descriptor_id": struct.unpack_from("<I", row, 0x04)[0],
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"selector_order": struct.unpack_from("<f", row, 0x00)[0],
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"target_mask_bits": row[0x65],
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"label_id": label_id,
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"label": labels.get(label_id, ""),
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"signature_byte_0x63": row[0x63],
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"signature_byte_0x64": row[0x64],
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"signature_hex_0x63_0x6d": row[0x63:0x6E].hex(),
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}
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)
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return rows
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def main() -> None:
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parser = argparse.ArgumentParser(description="Extract the RT3 EventEffects descriptor table.")
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parser.add_argument("exe", type=Path)
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parser.add_argument("lng", type=Path)
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parser.add_argument("out", type=Path)
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args = parser.parse_args()
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exe_bytes = args.exe.read_bytes()
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labels = load_lng_labels(args.lng)
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artifact = {
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"table_base_va": f"0x{TABLE_BASE_VA:08x}",
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"row_stride_hex": f"0x{ROW_STRIDE:02x}",
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"descriptor_count": ROW_COUNT,
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"binary_path_hint": str(args.exe),
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"language_path_hint": str(args.lng),
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"binary_sha256": hashlib.sha256(exe_bytes).hexdigest(),
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"descriptors": extract_rows(exe_bytes, labels),
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}
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args.out.write_text(json.dumps(artifact, indent=2) + "\n", encoding="utf-8")
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if __name__ == "__main__":
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main()
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