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https://github.com/RIOT-OS/RIOT.git
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70 lines
2.3 KiB
Bash
Executable File
70 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# Flash configuration field check script for Freescale Kinetis MCUs.
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#
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# This script is supposed to be called from RIOTs
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# unified OpenOCD script (dist/tools/openocd/openocd.sh).
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#
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# Syntax: check-fcfield.sh $FLASHFILE
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#
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# @author Jonas Remmert <j.remmert@phytec.de>
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# @author Johann Fischer <j.fischer@phytec.de>
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# @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
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# @author Francisco Molina <francisco.molina@inria.fr>
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: ${OBJDUMP:=arm-none-eabi-objdump}
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# elf, hex or bin file to flash
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FLASHFILE="$1"
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# FCFIELD goes from 0x400-0x40f
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FCFIELD_START='0x400'
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FCFIELD_END='0x410'
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FCFIELD_AWK_REGEX='^ 0400 '
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# The following fcfield places the flash in a unsecure state which is the default
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# FCF code for Freescale Kinetis MCUs, see /cpu/kinetis/fcfield.c.
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EXPECTED_FCFIELD="^fffffffffffffffffffffffffe..ffff$"
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get_fc_field()
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{
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if [ ${1##*.} = elf ]; then
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"${OBJDUMP}" -j.fcfield -s "${1}"
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elif [ ${1##*.} = bin ]; then
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"${OBJDUMP}" --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} -bbinary -marm ${1} -s
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elif [ ${1##*.} = hex ]; then
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"${OBJDUMP}" --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} ${1} -s
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else
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echo "Unknown file extension: ${1##*.}"
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exit 1
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fi
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}
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filter_fc_field()
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{
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get_fc_field "${1}" | awk -F' ' "/${2}/ { print \$2 \$3 \$4 \$5; }"
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}
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if [ $# -ne 1 ]; then
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echo "Usage: $0 FLASHFILE"
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echo "Checks the flash configuration field protection bits to avoid flashing a locked image to a Kinetis MCU (protection against accidental bricking)."
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exit 2
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fi
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if [ $(printf '%d' "${IMAGE_OFFSET}") -ge $(printf '%d' "${FCFIELD_END}") ]; then
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echo "Value in fcfield is not checked when flashing at \$IMAGE_OFFSET >= 0x410"
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exit 0
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elif [ 0 -lt $(printf '%d' "${IMAGE_OFFSET}") ] && [ $(printf '%d' "${IMAGE_OFFSET}") -lt $(printf '%d' "${FCFIELD_END}") ]; then
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echo "Error: flashing with 0 < \$IMAGE_OFFSET < 0x410 is currently not handled"
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exit 1
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elif ! filter_fc_field ${FLASHFILE} ${FCFIELD_AWK_REGEX} | grep -q "${EXPECTED_FCFIELD}"; then
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echo "Danger of bricking the device during flash!"
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echo "Flash configuration field of ${FLASHFILE}:"
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get_fc_field ${FLASHFILE}
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echo "Abort flash procedure!"
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exit 1
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fi
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echo "${FLASHFILE} is not locked."
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exit 0
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