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fstat13
2a58cbcb43
- docs/REVERSE_ENGINEERING.md: library extraction, scan-out ring, pan, chroma plane (V-first words), kernel-side notes, PLD delivery, timeline - tools/: dumplib payload + sprx/xref hunters + frame renderers (own code only)
28 lines
1.0 KiB
Python
28 lines
1.0 KiB
Python
#!/usr/bin/env python3
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"""Estrae un segmento PT_LOAD di un .sprx come binario piatto, per objdump."""
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import struct, sys
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src, dst = sys.argv[1], sys.argv[2]
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want = sys.argv[3] if len(sys.argv) > 3 else 'exec' # exec | all
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d=open(src,'rb').read()
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phoff=struct.unpack_from('<Q',d,32)[0]; phes=struct.unpack_from('<H',d,54)[0]; phn=struct.unpack_from('<H',d,56)[0]
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segs=[]
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for i in range(phn):
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o=phoff+i*phes
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t,fl,off,va,pa,fsz,msz,al=struct.unpack_from('<IIQQQQQQ',d,o)
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if t==1: segs.append((fl,off,va,fsz,msz))
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segs.sort(key=lambda s:s[2])
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if want=='exec':
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sel=[s for s in segs if s[0]&1]
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if not sel: print('nessun segmento eseguibile'); sys.exit(1)
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fl,off,va,fsz,msz=sel[0]
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open(dst,'wb').write(d[off:off+fsz])
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print('ADJUST_VMA=0x%x SIZE=0x%x' % (va,fsz))
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else:
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end=max(s[2]+s[4] for s in segs)
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base=min(s[2] for s in segs)
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buf=bytearray(end-base)
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for fl,off,va,fsz,msz in segs:
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buf[va-base:va-base+fsz]=d[off:off+fsz]
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open(dst,'wb').write(bytes(buf))
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print('ADJUST_VMA=0x%x SIZE=0x%x' % (base,len(buf)))
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