| #!/bin/bash | |
| # SPDX-License-Identifier: GPL-2.0 | |
| # | |
| # ----------------------------------------------------------------------------- | |
| # Extracts the vmlinux built-in firmware blobs - requires a non-stripped image | |
| # ----------------------------------------------------------------------------- | |
| if [ -z "$1" ]; then | |
| echo "Must provide a non-stripped vmlinux as argument" | |
| exit 1 | |
| fi | |
| read -r RD_ADDR_HEX RD_OFF_HEX <<< "$( readelf -SW "$1" |\ | |
| grep -w rodata | awk '{print "0x"$5" 0x"$6}' )" | |
| FW_SYMS="$(readelf -sW "$1" |\ | |
| awk -n '/fw_end/ { end=$2 ; print name " 0x" start " 0x" end; } { start=$2; name=$8; }')" | |
| while IFS= read -r entry; do | |
| read -r FW_NAME FW_ADDR_ST_HEX FW_ADDR_END_HEX <<< "$entry" | |
| # Notice kernel prepends _fw_ and appends _bin to the FW name | |
| # in rodata; hence we hereby filter that out. | |
| FW_NAME=${FW_NAME:4:-4} | |
| FW_OFFSET="$(printf "%d" $((FW_ADDR_ST_HEX - RD_ADDR_HEX + RD_OFF_HEX)))" | |
| FW_SIZE="$(printf "%d" $((FW_ADDR_END_HEX - FW_ADDR_ST_HEX)))" | |
| dd if="$1" of="./${FW_NAME}" bs="${FW_SIZE}" count=1 iflag=skip_bytes skip="${FW_OFFSET}" | |
| done <<< "${FW_SYMS}" |