1*35dac71cSGuilherme G. Piccoli#!/bin/bash 2*35dac71cSGuilherme G. Piccoli# SPDX-License-Identifier: GPL-2.0 3*35dac71cSGuilherme G. Piccoli# 4*35dac71cSGuilherme G. Piccoli# ----------------------------------------------------------------------------- 5*35dac71cSGuilherme G. Piccoli# Extracts the vmlinux built-in firmware blobs - requires a non-stripped image 6*35dac71cSGuilherme G. Piccoli# ----------------------------------------------------------------------------- 7*35dac71cSGuilherme G. Piccoli 8*35dac71cSGuilherme G. Piccoliif [ -z "$1" ]; then 9*35dac71cSGuilherme G. Piccoli echo "Must provide a non-stripped vmlinux as argument" 10*35dac71cSGuilherme G. Piccoli exit 1 11*35dac71cSGuilherme G. Piccolifi 12*35dac71cSGuilherme G. Piccoli 13*35dac71cSGuilherme G. Piccoliread -r RD_ADDR_HEX RD_OFF_HEX <<< "$( readelf -SW "$1" |\ 14*35dac71cSGuilherme G. Piccoligrep -w rodata | awk '{print "0x"$5" 0x"$6}' )" 15*35dac71cSGuilherme G. Piccoli 16*35dac71cSGuilherme G. PiccoliFW_SYMS="$(readelf -sW "$1" |\ 17*35dac71cSGuilherme G. Piccoliawk -n '/fw_end/ { end=$2 ; print name " 0x" start " 0x" end; } { start=$2; name=$8; }')" 18*35dac71cSGuilherme G. Piccoli 19*35dac71cSGuilherme G. Piccoliwhile IFS= read -r entry; do 20*35dac71cSGuilherme G. Piccoli read -r FW_NAME FW_ADDR_ST_HEX FW_ADDR_END_HEX <<< "$entry" 21*35dac71cSGuilherme G. Piccoli 22*35dac71cSGuilherme G. Piccoli # Notice kernel prepends _fw_ and appends _bin to the FW name 23*35dac71cSGuilherme G. Piccoli # in rodata; hence we hereby filter that out. 24*35dac71cSGuilherme G. Piccoli FW_NAME=${FW_NAME:4:-4} 25*35dac71cSGuilherme G. Piccoli 26*35dac71cSGuilherme G. Piccoli FW_OFFSET="$(printf "%d" $((FW_ADDR_ST_HEX - RD_ADDR_HEX + RD_OFF_HEX)))" 27*35dac71cSGuilherme G. Piccoli FW_SIZE="$(printf "%d" $((FW_ADDR_END_HEX - FW_ADDR_ST_HEX)))" 28*35dac71cSGuilherme G. Piccoli 29*35dac71cSGuilherme G. Piccoli dd if="$1" of="./${FW_NAME}" bs="${FW_SIZE}" count=1 iflag=skip_bytes skip="${FW_OFFSET}" 30*35dac71cSGuilherme G. Piccolidone <<< "${FW_SYMS}" 31