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authorStephen Rothwell <sfr@canb.auug.org.au>2015-03-18 08:46:16 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2015-03-23 06:47:39 +0300
commita71aa05e1416863e6b6a3e0af8f847a711f1145d (patch)
treed584ebf9dd62c559a83ecd18c55a061e983e9060 /arch/powerpc/relocs_check.sh
parente4a9616c548f67537a8d020a45a327f6a4d583ee (diff)
downloadlinux-a71aa05e1416863e6b6a3e0af8f847a711f1145d.tar.xz
powerpc: Convert relocs_check to a shell script using grep
This runs a bit faster and removes another use of perl from the kernel build. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-By: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/relocs_check.sh')
-rwxr-xr-xarch/powerpc/relocs_check.sh59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/powerpc/relocs_check.sh b/arch/powerpc/relocs_check.sh
new file mode 100755
index 000000000000..2e4ebd0e25b3
--- /dev/null
+++ b/arch/powerpc/relocs_check.sh
@@ -0,0 +1,59 @@
+#!/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