1#!/bin/sh 2 3# Copyright © 2015 IBM Corporation 4 5# This program is free software; you can redistribute it and/or 6# modify it under the terms of the GNU General Public License 7# as published by the Free Software Foundation; either version 8# 2 of the License, or (at your option) any later version. 9 10# This script checks the relocations of a vmlinux for "suspicious" 11# relocations. 12 13# based on relocs_check.pl 14# Copyright © 2009 IBM Corporation 15 16if [ $# -lt 2 ]; then 17 echo "$0 [path to objdump] [path to vmlinux]" 1>&2 18 exit 1 19fi 20 21# Have Kbuild supply the path to objdump so we handle cross compilation. 22objdump="$1" 23vmlinux="$2" 24 25bad_relocs=$( 26"$objdump" -R "$vmlinux" | 27 # Only look at relocation lines. 28 grep -E '\<R_' | 29 # These relocations are okay 30 # On PPC64: 31 # R_PPC64_RELATIVE, R_PPC64_NONE 32 # R_PPC64_ADDR64 mach_<name> 33 # On PPC: 34 # R_PPC_RELATIVE, R_PPC_ADDR16_HI, 35 # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, 36 # R_PPC_NONE 37 grep -F -w -v 'R_PPC64_RELATIVE 38R_PPC64_NONE 39R_PPC_ADDR16_LO 40R_PPC_ADDR16_HI 41R_PPC_ADDR16_HA 42R_PPC_RELATIVE 43R_PPC_NONE' | 44 grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' 45) 46 47if [ -z "$bad_relocs" ]; then 48 exit 0 49fi 50 51num_bad=$(echo "$bad_relocs" | wc -l) 52echo "WARNING: $num_bad bad relocations" 53echo "$bad_relocs" 54 55# If we see this type of relocation it's an idication that 56# we /may/ be using an old version of binutils. 57if echo "$bad_relocs" | grep -q -F -w R_PPC64_UADDR64; then 58 echo "WARNING: You need at least binutils >= 2.19 to build a CONFIG_RELOCATABLE kernel" 59fi 60