This is a note to let you know that I've just added the patch titled

scripts/faddr2line: extend usage on generic arch

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: scripts-faddr2line-extend-usage-on-generic-arch.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Feb 1 13:45:42 CET 2018

From: "Liu, Changcheng" changcheng.liu@intel.com Date: Wed, 29 Nov 2017 16:10:25 -0800 Subject: scripts/faddr2line: extend usage on generic arch

From: "Liu, Changcheng" changcheng.liu@intel.com

[ Upstream commit 95a87982541932503d3f59aba4c30b0bde0a6294 ]

When cross-compiling, fadd2line should use the binary tool used for the target system, rather than that of the host.

Link: http://lkml.kernel.org/r/20171121092911.GA150711@sofia Signed-off-by: Liu Changcheng changcheng.liu@intel.com Cc: Kate Stewart kstewart@linuxfoundation.org Cc: NeilBrown neilb@suse.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- scripts/faddr2line | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-)

--- a/scripts/faddr2line +++ b/scripts/faddr2line @@ -44,9 +44,16 @@ set -o errexit set -o nounset

+READELF="${CROSS_COMPILE}readelf" +ADDR2LINE="${CROSS_COMPILE}addr2line" +SIZE="${CROSS_COMPILE}size" +NM="${CROSS_COMPILE}nm" + command -v awk >/dev/null 2>&1 || die "awk isn't installed" -command -v readelf >/dev/null 2>&1 || die "readelf isn't installed" -command -v addr2line >/dev/null 2>&1 || die "addr2line isn't installed" +command -v ${READELF} >/dev/null 2>&1 || die "readelf isn't installed" +command -v ${ADDR2LINE} >/dev/null 2>&1 || die "addr2line isn't installed" +command -v ${SIZE} >/dev/null 2>&1 || die "size isn't installed" +command -v ${NM} >/dev/null 2>&1 || die "nm isn't installed"

usage() { echo "usage: faddr2line <object file> <func+offset> <func+offset>..." >&2 @@ -69,10 +76,10 @@ die() { find_dir_prefix() { local objfile=$1

- local start_kernel_addr=$(readelf -sW $objfile | awk '$8 == "start_kernel" {printf "0x%s", $2}') + local start_kernel_addr=$(${READELF} -sW $objfile | awk '$8 == "start_kernel" {printf "0x%s", $2}') [[ -z $start_kernel_addr ]] && return

- local file_line=$(addr2line -e $objfile $start_kernel_addr) + local file_line=$(${ADDR2LINE} -e $objfile $start_kernel_addr) [[ -z $file_line ]] && return

local prefix=${file_line%init/main.c:*} @@ -104,7 +111,7 @@ __faddr2line() {

# Go through each of the object's symbols which match the func name. # In rare cases there might be duplicates. - file_end=$(size -Ax $objfile | awk '$1 == ".text" {print $2}') + file_end=$(${SIZE} -Ax $objfile | awk '$1 == ".text" {print $2}') while read symbol; do local fields=($symbol) local sym_base=0x${fields[0]} @@ -156,10 +163,10 @@ __faddr2line() {

# pass real address to addr2line echo "$func+$offset/$sym_size:" - addr2line -fpie $objfile $addr | sed "s; $dir_prefix(./)*; ;" + ${ADDR2LINE} -fpie $objfile $addr | sed "s; $dir_prefix(./)*; ;" DONE=1

- done < <(nm -n $objfile | awk -v fn=$func -v end=$file_end '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, "0x"$1 } END {if (found == 1) print line, end; }') + done < <(${NM} -n $objfile | awk -v fn=$func -v end=$file_end '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, "0x"$1 } END {if (found == 1) print line, end; }') }

[[ $# -lt 2 ]] && usage

Patches currently in stable-queue which might be from changcheng.liu@intel.com are

queue-4.14/scripts-faddr2line-extend-usage-on-generic-arch.patch