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54ffd50fa2
* Extract ROM segments from gc-eu-mq (take 2)
* Apply suggestions from code review
Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com>
* Typo
* dma_{start,names} -> dmadata_{start,names}
* Restore dest
* Don't assume rom location == vrom location
---------
Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com>
76 lines
2.1 KiB
Python
Executable file
76 lines
2.1 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-FileCopyrightText: © 2024 ZeldaRET
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# SPDX-License-Identifier: CC0-1.0
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from __future__ import annotations
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import argparse
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from pathlib import Path
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import sys
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import dmadata
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def main():
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parser = argparse.ArgumentParser(
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description="Extract segments from an uncompressed ROM, based on its dmadata."
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)
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parser.add_argument(
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"rom", metavar="ROM", type=Path, help="Path to uncompressed ROM"
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)
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parser.add_argument(
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"-o",
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"--output-dir",
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type=Path,
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required=True,
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help="Output directory for segments",
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)
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parser.add_argument(
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"--dmadata-start",
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type=lambda s: int(s, 16),
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required=True,
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help=(
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"The dmadata location in the rom, as a hexadecimal offset (e.g. 0x12f70)"
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),
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)
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parser.add_argument(
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"--dmadata-names",
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type=Path,
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required=True,
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help="Path to file containing segment names",
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)
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args = parser.parse_args()
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rom_data = memoryview(args.rom.read_bytes())
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dma_names = args.dmadata_names.read_text().splitlines()
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dma_entries = dmadata.read_dmadata(rom_data, args.dmadata_start)
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if len(dma_names) != len(dma_entries):
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print(
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f"Error: expected {len(dma_names)} DMA entries but found {len(dma_entries)} in ROM",
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file=sys.stderr,
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)
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exit(1)
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args.output_dir.mkdir(parents=True, exist_ok=True)
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for dma_name, dma_entry in zip(dma_names, dma_entries):
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if dma_entry.is_compressed():
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print(f"Error: segment {dma_name} is compressed", file=sys.stderr)
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exit(1)
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segment_rom_start = dma_entry.rom_start
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segment_rom_end = dma_entry.rom_start + (
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dma_entry.vrom_end - dma_entry.vrom_start
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)
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segment_data = rom_data[segment_rom_start:segment_rom_end]
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segment_path = args.output_dir / dma_name
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segment_path.write_bytes(segment_data)
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print(f"Extracted {len(dma_entries)} segments to {args.output_dir}")
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if __name__ == "__main__":
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main()
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