1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0-or-later 3 4# Copyright © 2015 IBM Corporation 5 6 7# This script checks the relocations of a vmlinux for "suspicious" 8# relocations. 9 10# based on relocs_check.pl 11# Copyright © 2009 IBM Corporation 12 13if [ $# -lt 2 ]; then 14 echo "$0 [path to objdump] [path to vmlinux]" 1>&2 15 exit 1 16fi 17 18# Have Kbuild supply the path to objdump so we handle cross compilation. 19objdump="$1" 20vmlinux="$2" 21 22bad_relocs=$( 23$objdump -R "$vmlinux" | 24 # Only look at relocation lines. 25 grep -E '\<R_' | 26 # These relocations are okay 27 # On PPC64: 28 # R_PPC64_RELATIVE, R_PPC64_NONE 29 # R_PPC64_ADDR64 mach_<name> 30 # R_PPC64_ADDR64 __crc_<name> 31 # On PPC: 32 # R_PPC_RELATIVE, R_PPC_ADDR16_HI, 33 # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, 34 # R_PPC_NONE 35 grep -F -w -v 'R_PPC64_RELATIVE 36R_PPC64_NONE 37R_PPC_ADDR16_LO 38R_PPC_ADDR16_HI 39R_PPC_ADDR16_HA 40R_PPC_RELATIVE 41R_PPC_NONE' | 42 grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' | 43 grep -E -v '\<R_PPC64_ADDR64[[:space:]]+__crc_' 44) 45 46if [ -z "$bad_relocs" ]; then 47 exit 0 48fi 49 50num_bad=$(echo "$bad_relocs" | wc -l) 51echo "WARNING: $num_bad bad relocations" 52echo "$bad_relocs" 53 54# If we see this type of relocation it's an idication that 55# we /may/ be using an old version of binutils. 56if echo "$bad_relocs" | grep -q -F -w R_PPC64_UADDR64; then 57 echo "WARNING: You need at least binutils >= 2.19 to build a CONFIG_RELOCATABLE kernel" 58fi 59