Greg Kroah-Hartman
d69a93709f
Link: https://lore.kernel.org/r/20260528194638.371537336@linuxfoundation.org Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Pavel Machek (CIP) <pavel@nabladev.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Wentao Guan <guanwentao@uniontech.com> Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
31 lines
1.1 KiB
Bash
Executable File
31 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# -----------------------------------------------------------------------------
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# Extracts the vmlinux built-in firmware blobs - requires a non-stripped image
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# -----------------------------------------------------------------------------
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if [ -z "$1" ]; then
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echo "Must provide a non-stripped vmlinux as argument"
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exit 1
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fi
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read -r RD_ADDR_HEX RD_OFF_HEX <<< "$( readelf -SW "$1" |\
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grep -w rodata | awk '{print "0x"$5" 0x"$6}' )"
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FW_SYMS="$(readelf -sW "$1" |\
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awk -n '/fw_end/ { end=$2 ; print name " 0x" start " 0x" end; } { start=$2; name=$8; }')"
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while IFS= read -r entry; do
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read -r FW_NAME FW_ADDR_ST_HEX FW_ADDR_END_HEX <<< "$entry"
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# Notice kernel prepends _fw_ and appends _bin to the FW name
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# in rodata; hence we hereby filter that out.
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FW_NAME=${FW_NAME:4:-4}
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FW_OFFSET="$(printf "%d" $((FW_ADDR_ST_HEX - RD_ADDR_HEX + RD_OFF_HEX)))"
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FW_SIZE="$(printf "%d" $((FW_ADDR_END_HEX - FW_ADDR_ST_HEX)))"
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dd if="$1" of="./${FW_NAME}" bs="${FW_SIZE}" count=1 iflag=skip_bytes skip="${FW_OFFSET}"
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done <<< "${FW_SYMS}"
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