1b71c9ffbSNicholas Piggin#!/bin/sh 2b71c9ffbSNicholas Piggin 3b71c9ffbSNicholas Piggin# Copyright © 2015 IBM Corporation 4b71c9ffbSNicholas Piggin 5b71c9ffbSNicholas Piggin# This program is free software; you can redistribute it and/or 6b71c9ffbSNicholas Piggin# modify it under the terms of the GNU General Public License 7b71c9ffbSNicholas Piggin# as published by the Free Software Foundation; either version 8b71c9ffbSNicholas Piggin# 2 of the License, or (at your option) any later version. 9b71c9ffbSNicholas Piggin 10b71c9ffbSNicholas Piggin# This script checks the relocations of a vmlinux for "suspicious" 11b71c9ffbSNicholas Piggin# relocations. 12b71c9ffbSNicholas Piggin 13b71c9ffbSNicholas Piggin# based on relocs_check.pl 14b71c9ffbSNicholas Piggin# Copyright © 2009 IBM Corporation 15b71c9ffbSNicholas Piggin 16b71c9ffbSNicholas Pigginif [ $# -lt 2 ]; then 17b71c9ffbSNicholas Piggin echo "$0 [path to objdump] [path to vmlinux]" 1>&2 18b71c9ffbSNicholas Piggin exit 1 19b71c9ffbSNicholas Pigginfi 20b71c9ffbSNicholas Piggin 21b71c9ffbSNicholas Piggin# Have Kbuild supply the path to objdump so we handle cross compilation. 22b71c9ffbSNicholas Pigginobjdump="$1" 23b71c9ffbSNicholas Pigginvmlinux="$2" 24b71c9ffbSNicholas Piggin 25b71c9ffbSNicholas Pigginbad_relocs=$( 26b71c9ffbSNicholas Piggin"$objdump" -R "$vmlinux" | 27b71c9ffbSNicholas Piggin # Only look at relocation lines. 28b71c9ffbSNicholas Piggin grep -E '\<R_' | 29b71c9ffbSNicholas Piggin # These relocations are okay 30b71c9ffbSNicholas Piggin # On PPC64: 31b71c9ffbSNicholas Piggin # R_PPC64_RELATIVE, R_PPC64_NONE 32b71c9ffbSNicholas Piggin # R_PPC64_ADDR64 mach_<name> 33b71c9ffbSNicholas Piggin # R_PPC64_ADDR64 __crc_<name> 34b71c9ffbSNicholas Piggin # On PPC: 35b71c9ffbSNicholas Piggin # R_PPC_RELATIVE, R_PPC_ADDR16_HI, 36b71c9ffbSNicholas Piggin # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, 37b71c9ffbSNicholas Piggin # R_PPC_NONE 38b71c9ffbSNicholas Piggin grep -F -w -v 'R_PPC64_RELATIVE 39b71c9ffbSNicholas PigginR_PPC64_NONE 40b71c9ffbSNicholas PigginR_PPC_ADDR16_LO 41b71c9ffbSNicholas PigginR_PPC_ADDR16_HI 42b71c9ffbSNicholas PigginR_PPC_ADDR16_HA 43b71c9ffbSNicholas PigginR_PPC_RELATIVE 44b71c9ffbSNicholas PigginR_PPC_NONE' | 45b71c9ffbSNicholas Piggin grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' | 46b71c9ffbSNicholas Piggin grep -E -v '\<R_PPC64_ADDR64[[:space:]]+__crc_' 47b71c9ffbSNicholas Piggin) 48b71c9ffbSNicholas Piggin 49b71c9ffbSNicholas Pigginif [ -z "$bad_relocs" ]; then 50b71c9ffbSNicholas Piggin exit 0 51b71c9ffbSNicholas Pigginfi 52b71c9ffbSNicholas Piggin 53b71c9ffbSNicholas Pigginnum_bad=$(echo "$bad_relocs" | wc -l) 54b71c9ffbSNicholas Pigginecho "WARNING: $num_bad bad relocations" 55b71c9ffbSNicholas Pigginecho "$bad_relocs" 56b71c9ffbSNicholas Piggin 57b71c9ffbSNicholas Piggin# If we see this type of relocation it's an idication that 58b71c9ffbSNicholas Piggin# we /may/ be using an old version of binutils. 59b71c9ffbSNicholas Pigginif echo "$bad_relocs" | grep -q -F -w R_PPC64_UADDR64; then 60b71c9ffbSNicholas Piggin echo "WARNING: You need at least binutils >= 2.19 to build a CONFIG_RELOCATABLE kernel" 61b71c9ffbSNicholas Pigginfi 62