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-rw-r--r--arch/powerpc/Makefile.postlink9
-rwxr-xr-xarch/powerpc/tools/unrel_branch_check.sh57
2 files changed, 65 insertions, 1 deletions
diff --git a/arch/powerpc/Makefile.postlink b/arch/powerpc/Makefile.postlink
index eccfcc88afae..50336930e6f7 100644
--- a/arch/powerpc/Makefile.postlink
+++ b/arch/powerpc/Makefile.postlink
@@ -11,7 +11,14 @@ __archpost:
include scripts/Kbuild.include
quiet_cmd_relocs_check = CHKREL $@
- cmd_relocs_check = $(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/relocs_check.sh "$(OBJDUMP)" "$@"
+ifdef CONFIG_PPC_BOOK3S_64
+ cmd_relocs_check = \
+ $(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/relocs_check.sh "$(OBJDUMP)" "$@" ; \
+ $(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/unrel_branch_check.sh "$(OBJDUMP)" "$@"
+else
+ cmd_relocs_check = \
+ $(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/relocs_check.sh "$(OBJDUMP)" "$@"
+endif
# `@true` prevents complaint when there is nothing to be done
diff --git a/arch/powerpc/tools/unrel_branch_check.sh b/arch/powerpc/tools/unrel_branch_check.sh
new file mode 100755
index 000000000000..1e972df3107e
--- /dev/null
+++ b/arch/powerpc/tools/unrel_branch_check.sh
@@ -0,0 +1,57 @@
+# Copyright © 2016 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"
+# branches from unrelocated code (head_64.S code).
+
+# Turn this on if you want more debug output:
+# set -x
+
+# Have Kbuild supply the path to objdump so we handle cross compilation.
+objdump="$1"
+vmlinux="$2"
+
+#__end_interrupts should be located within the first 64K
+
+end_intr=0x$(
+"$objdump" -R "$vmlinux" -d --start-address=0xc000000000000000 \
+ --stop-address=0xc000000000010000 |
+grep '\<__end_interrupts>:' |
+awk '{print $1}'
+)
+
+BRANCHES=$(
+"$objdump" -R "$vmlinux" -D --start-address=0xc000000000000000 \
+ --stop-address=${end_intr} |
+grep -e "^c[0-9a-f]*:[[:space:]]*\([0-9a-f][0-9a-f][[:space:]]\)\{4\}[[:space:]]*b" |
+grep -v '\<__start_initialization_multiplatform>' |
+grep -v -e 'b.\?.\?ctr' |
+grep -v -e 'b.\?.\?lr' |
+sed 's/://' |
+awk '{ print $1 ":" $6 ":0x" $7 ":" $8 " "}'
+)
+
+for tuple in $BRANCHES
+do
+ from=`echo $tuple | cut -d':' -f1`
+ branch=`echo $tuple | cut -d':' -f2`
+ to=`echo $tuple | cut -d':' -f3 | sed 's/cr[0-7],//'`
+ sym=`echo $tuple | cut -d':' -f4`
+
+ if (( $to > $end_intr ))
+ then
+ if [ -z "$bad_branches" ]; then
+ echo "WARNING: Unrelocated relative branches"
+ bad_branches="yes"
+ fi
+ echo "$from $branch-> $to $sym"
+ fi
+done
+
+if [ -z "$bad_branches" ]; then
+ exit 0
+fi