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#!/bin/sh # Copyright © 2015 IBM Corporation # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version # 2 of the License, or (at your option) any later version. # This script checks the relocations of a vmlinux for "suspicious" # relocations. # based on relocs_check.pl # Copyright © 2009 IBM Corporation if [ $# -lt 2 ]; then echo "$0 [path to objdump] [path to vmlinux]" 1>&2 exit 1 fi # Have Kbuild supply the path to objdump so we handle cross compilation. objdump="$1" vmlinux="$2" bad_relocs=$( "$objdump" -R "$vmlinux" | # Only look at relocation lines. grep -E '\<R_' | # These relocations are okay # On PPC64: # R_PPC64_RELATIVE, R_PPC64_NONE # R_PPC64_ADDR64 mach_<name> # On PPC: # R_PPC_RELATIVE, R_PPC_ADDR16_HI, # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, # R_PPC_NONE grep -F -w -v 'R_PPC64_RELATIVE R_PPC64_NONE R_PPC_ADDR16_LO R_PPC_ADDR16_HI R_PPC_ADDR16_HA R_PPC_RELATIVE R_PPC_NONE' | grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' ) if [ -z "$bad_relocs" ]; then exit 0 fi num_bad=$(echo "$bad_relocs" | wc -l) echo "WARNING: $num_bad bad relocations" echo "$bad_relocs" # If we see this type of relocation it's an idication that # we /may/ be using an old version of binutils. if echo "$bad_relocs" | grep -q -F -w R_PPC64_UADDR64; then echo "WARNING: You need at least binutils >= 2.19 to build a CONFIG_RELOCATABLE kernel" fi