FreeCalypso > hg > freecalypso-tools

annotate rvinterf/doc/tfc139.usage @ 620:dd162a4cb9fa

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CHANGES: objective performance comparison instead of blind patch
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:21:58 +0000
parents e7502631a0f9
children
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1 The tfc139 hack-utility (see ../../doc/Compal-unlock) is based on the
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2 rvinterf/rvtdump skeleton, and it needs to be invoked as follows:
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3
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4 tfc139 [options] /dev/ttyXXX
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6 In the well-tested use case of breaking into TFC139 phones with fw version
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7 8.8.17, no options are normally needed, but the following options are supported:
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8
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9 -a address
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10
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11 This option changes the RAM address into which the "shellcode" is to be
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12 written; the argument is always interpreted as hex. The default is
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13 0x800000, as used by the mot931c.exe closed source tool on whose
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14 reverse-engineering our hack-utility is based.
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16 -B baud
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18 This option changes the serial baud rate just like in rvinterf and
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19 rvtdump, but the default is 57600 as needed for breaking into TFC139
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20 firmware.
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21
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22 -l logfile
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23
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24 Log activity in a file, just like rvinterf and rvtdump.
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25
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26 -s address
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27
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28 Just like mot931c.exe has been observed to do, we start our stack
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29 smashing attempts at a certain address, and keep incrementing by 4
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30 until we either succeed or crash the fw in some other way that does not
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31 help us. This option changes the starting address for these stack
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32 smashing attempts; the argument is always interpreted as hex. The
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33 default is 0x837C54, as observed from the reverse engineering of
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34 mot931c.
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36 -w number_in_seconds
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37
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38 See rvinterf.usage; the option is the same for tfc139 as for rvinterf.