[linux-block.git] / scripts / relocs_check.sh

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later

# Get a list of all the relocations, remove from it the relocations
# that are known to be legitimate and return this list to arch specific
# script that will look for suspicious relocations.

objdump="$1"
nm="$2"
vmlinux="$3"

# Remove from the possible bad relocations those that match an undefined
# weak symbol which will result in an absolute relocation to 0.
# Weak unresolved symbols are of that form in nm output:
# "                  w _binary__btf_vmlinux_bin_end"
undef_weak_symbols=$($nm "$vmlinux" | awk '$1 ~ /w/ { print $2 }')

$objdump -R "$vmlinux" |
	grep -E '\<R_' |
	([ "$undef_weak_symbols" ] && grep -F -w -v "$undef_weak_symbols" || cat)
Commit	Line	Data
47981b5c AG	1	#!/bin/sh
	2	# SPDX-License-Identifier: GPL-2.0-or-later
	3
	4	# Get a list of all the relocations, remove from it the relocations
	5	# that are known to be legitimate and return this list to arch specific
	6	# script that will look for suspicious relocations.
	7
	8	objdump="$1"
	9	nm="$2"
	10	vmlinux="$3"
	11
	12	# Remove from the possible bad relocations those that match an undefined
	13	# weak symbol which will result in an absolute relocation to 0.
	14	# Weak unresolved symbols are of that form in nm output:
	15	# " w _binary__btf_vmlinux_bin_end"
	16	undef_weak_symbols=$($nm "$vmlinux" \| awk '$1 ~ /w/ { print $2 }')
	17
	18	$objdump -R "$vmlinux" \|
	19	grep -E '\<R_' \|
	20	([ "$undef_weak_symbols" ] && grep -F -w -v "$undef_weak_symbols" \|\| cat)