b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
54 lines
2.7 KiB
Python
54 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: MPL-2.0
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"""Inspect the embedded configuration of our pinned sargo kernel, without a phone."""
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import json
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from pathlib import Path
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import subprocess
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import zlib
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from tundra import ROOT, digest, now, save
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def inspect(path):
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# The AOSP artifact appends device trees to an LZ4 stream. lz4 reports trailing
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# data, so validate the embedded gzip/config payload rather than its exit code.
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result = subprocess.run(['lz4','-dc',str(path)],capture_output=True,check=False)
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start=result.stdout.find(b'IKCFG_ST')
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if start<0: raise ValueError('Kernel has no embedded IKCONFIG signature')
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stream=zlib.decompressobj(31)
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raw=stream.decompress(result.stdout[start+8:])
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if not stream.eof or not stream.unused_data.startswith(b'IKCFG_ED'):
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raise ValueError('Invalid compressed kernel config or terminator')
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config=raw.decode()
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if not config.startswith('#\n# Automatically generated file; DO NOT EDIT.'):
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raise ValueError('Unexpected kernel config format')
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values={}
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for line in config.splitlines():
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if line.startswith('CONFIG_'):
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key,value=line.split('=',1);values[key]=value
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elif line.startswith('# CONFIG_') and line.endswith(' is not set'):
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values[line.split()[1]]='n'
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keys=['CONFIG_ARM64','CONFIG_DEVTMPFS','CONFIG_CONFIGFS_FS','CONFIG_USB_DWC3',
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'CONFIG_USB_DWC3_MSM','CONFIG_USB_CONFIGFS','CONFIG_USB_CONFIGFS_ACM',
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'CONFIG_USB_CONFIGFS_F_FS','CONFIG_PSTORE','CONFIG_PSTORE_RAM','CONFIG_PSTORE_CONSOLE']
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return config,{key:values.get(key,'absent') for key in keys}
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def main():
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# Source layout is owned by the common tooling.
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from tundra import locked
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commit=locked('aosp-sargo-kernel')['commit']
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path=ROOT/'downloads/aosp-sargo-kernel'/commit/'Image.lz4-dtb'
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config,features=inspect(path)
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folder=ROOT/'out/sargo';folder.mkdir(parents=True,exist_ok=True)
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(folder/'kernel.config').write_text(config)
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report={'recordedAt':now(),'kernelSha256':digest(path),'sourceCommit':commit,
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'features':features,'hardwareTested':False,
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'usbDiagnosticReady':False,
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'conclusions':['USB FunctionFS is compiled in; an actual userspace service is still needed.',
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'USB ACM is not compiled in; a generic ttyGS0 console will not work with this prebuilt.',
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'devtmpfs is not compiled in; Android uevent/device-node handling must be provided.',
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'pstore support does not prove reserved RAM works on this phone.']}
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save(folder/'kernel-audit.json',report)
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print(json.dumps(report,indent=2))
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if __name__=='__main__': main()
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