From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1417C2FB2 for ; Mon, 17 Mar 2025 05:31:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742189485; cv=none; b=epM776n0LJ1u4CbZuwyPPC3+CT9wKgBeM3571S3KdfjcnI0He4FXRx6SnOxvdSnVANA/Z5N0+z3LDNttOeosHf1zfqfKhUM4YgGHW10xxSb4ukUTROx0vmhi8diLov2euCL8danlB4jqX1J3j37J9tmdHb+nfALBd3gvXtxdlfQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742189485; c=relaxed/simple; bh=DC9i4b2V5kpYnagTbeAJfgD98UBJlFMmHqy3HY4VI4s=; h=Date:To:From:Subject:Message-Id; b=qvSlSLjY78fsqbcSAPr/u9eZ1mwOgY2kv66UFIg/l3WbagYipqYezqeQoURMQVKC3q/YVIRmqRoCrwawOxljXJgLFr6Ndk8S1biOVp3AvQOkVtU7DfC/V0bZWlzfzviSvmIzOhVfMz65O7jxtv0uG6jZio0bdg9ROpRBQYg4EI4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=qqEFbEy8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="qqEFbEy8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 718BCC4CEEC; Mon, 17 Mar 2025 05:31:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1742189484; bh=DC9i4b2V5kpYnagTbeAJfgD98UBJlFMmHqy3HY4VI4s=; h=Date:To:From:Subject:From; b=qqEFbEy85kAqok8ECIQM9yy4r7ZKVfUHkIT1w0/YGj64dgTyHUOHb8lcT/A4Upogz ElSv/G2rXOCts/OQQSXGuWtHcZoAiXq15sRWdN1mWjVlnu+m1dK60LcGWbUXdasOxD F07QQY08bjMDkWJgY1vD1xCxM/EnzsQ7H2NDxtvg= Date: Sun, 16 Mar 2025 22:31:23 -0700 To: mm-commits@vger.kernel.org,russ.weight@linux.dev,rafael@kernel.org,nicolas@fjasle.eu,nathan@kernel.org,mcgrof@kernel.org,masahiroy@kernel.org,gregkh@linuxfoundation.org,dakr@kernel.org,cascardo@igalia.com,gpiccoli@igalia.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-nonmm-stable] scripts-add-script-to-extract-built-in-firmware-blobs.patch removed from -mm tree Message-Id: <20250317053124.718BCC4CEEC@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: scripts: add script to extract built-in firmware blobs has been removed from the -mm tree. Its filename was scripts-add-script-to-extract-built-in-firmware-blobs.patch This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: "Guilherme G. Piccoli" Subject: scripts: add script to extract built-in firmware blobs Date: Mon, 20 Jan 2025 16:04:26 -0300 There is currently no tool to extract a firmware blob that is built-in on vmlinux to the best of my knowledge. So if we have a kernel image containing the blobs, and we want to rebuild the kernel with some debug patches for example (and given that the image also has IKCONFIG=y), we currently can't do that for the same versions for all the firmware blobs, _unless_ we have exact commits of linux-firmware for the specific versions for each firmware included. Through the options CONFIG_EXTRA_FIRMWARE{_DIR} one is able to build a kernel including firmware blobs in a built-in fashion. This is usually the case of built-in drivers that require some blobs in order to work properly, for example, like in non-initrd based systems. Add hereby a script to extract these blobs from a non-stripped vmlinux, similar to the idea of "extract-ikconfig". The firmware loader interface saves such built-in blobs as rodata entries, having a field for the FW name as "_fw___bin"; the tool extracts files named "_" for each rodata firmware entry detected. It makes use of awk, bash, dd and readelf, pretty standard tooling for Linux development. With this tool, we can blindly extract the FWs and easily re-add them in the new debug kernel build, allowing a more deterministic testing without the burden of "hunting down" the proper version of each firmware binary. Link: https://lkml.kernel.org/r/20250120190436.127578-1-gpiccoli@igalia.com Signed-off-by: Guilherme G. Piccoli Suggested-by: Thadeu Lima de Souza Cascardo Reviewed-by: Thadeu Lima de Souza Cascardo Cc: Danilo Krummrich Cc: Greg Kroah-Hartman Cc: Luis Chamberalin Cc: Masahiro Yamada Cc: Nathan Chancellor Cc: Nicolas Schier Cc: "Rafael J. Wysocki" Cc: Russ Weight Signed-off-by: Andrew Morton --- scripts/extract-fwblobs | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/scripts/extract-fwblobs a/scripts/extract-fwblobs new file mode 100755 --- /dev/null +++ a/scripts/extract-fwblobs @@ -0,0 +1,30 @@ +#!/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}" _ Patches currently in -mm which might be from gpiccoli@igalia.com are