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42 lines
682 B
Python
Executable File
42 lines
682 B
Python
Executable File
#!/usr/bin/env python
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"""
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Convert an 0407 binary into an 0405 binary, under the assumption
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that the code starts at 040014 (by ". = . + 40014").
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See tools/as.
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"""
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import struct
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def words(bs) :
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l = len(bs) / 2
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return list(struct.unpack('<%dH' % l, bs))
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def unwords(ws) :
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l = len(ws)
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return struct.pack('<%dH' % l, *ws)
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def read(fn) :
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f = file(fn, 'rb')
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d = f.read()
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f.close()
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return d
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def write(fn, d) :
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f = file(fn, 'wb')
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f.write(d)
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f.close()
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orig = 040000
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d = words(read('a.out'))
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hdr = d[:8]
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d = d[8 + orig/2 :]
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d[0] = 0405
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d[1] = hdr[1] - orig
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d[2] = 0
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d[3] = 0
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d[4] = hdr[4]
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d[5] = 0
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d = d[:d[1] / 2]
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write("b.out", unwords(d))
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