FreeCalypso > hg > freecalypso-sw

annotate target-utils/tf-breakin/payload.S @ 983:7166c8311b0d

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tfc139 reworked to support both ARM and Thumb entry
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Thu, 10 Dec 2015 08:07:47 +0000
parents 4e0aa166baa5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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356
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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1 .text
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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2 .org 0
983
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
diff changeset
3
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
diff changeset
4 @ allow entry in Thumb state
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
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5 .code 16
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
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6 bx pc
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
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7 nop
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
diff changeset
8
356
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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9 .code 32
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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10
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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11 @ set CPSR like mot931c payload does
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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12 msr CPSR_c, #0xd3
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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13 @ disable the watchdog
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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14 ldr r1, =0xfffff802
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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15 mov r0, #0xf5
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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16 strh r0, [r1, #2]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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17 mov r0, #0xa0
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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18 strh r0, [r1, #2]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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19 @ MODEM UART
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 ldr r6, =0xffff5800
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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21 @ wait for any previous output to flush out
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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22 1: ldrb r0, [r6, #5]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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23 tst r0, #0x20
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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24 beq 1b
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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25 @ send our indication
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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26 adr r1, outstr
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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27 mov r2, #6
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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28 1: ldrb r0, [r1], #1
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
29 strb r0, [r6]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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30 subs r2, r2, #1
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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31 bne 1b
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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32 @ wait for this output to go out to the TxD pin
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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33 1: ldrb r0, [r6, #5]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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34 tst r0, #0x40
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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35 beq 1b
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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36 @ enable the Calypso boot ROM
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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37 ldr r1, =0xFFFFFB10
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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38 mov r2, #0x0100
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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39 strh r2, [r1]
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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40 @ jump to it!
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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41 mov pc, #0
983
7166c8311b0d tfc139 reworked to support both ARM and Thumb entry
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents: 356
diff changeset
42 .ltorg
356
4e0aa166baa5 target-utils/tf-breakin: payload written for the TF C139 break-in attempt
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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43 outstr: .byte 2,2,2,'O','K',2