objtool: Move kernel headers/code sync check to a script

$(OBJTOOL_IN): fixdep FORCE

	@$(MAKE) $(build)=objtool

# Busybox's diff doesn't have -I, avoid warning in that case

#

$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)

	@(diff -I 2>&1 | grep -q 'option requires an argument' && \

	test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \

	diff arch/x86/lib/insn.c ../../arch/x86/lib/insn.c >/dev/null && \

	diff arch/x86/lib/inat.c ../../arch/x86/lib/inat.c >/dev/null && \

	diff arch/x86/lib/x86-opcode-map.txt ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \

	diff arch/x86/tools/gen-insn-attr-x86.awk ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \

	diff arch/x86/include/asm/insn.h ../../arch/x86/include/asm/insn.h >/dev/null && \

	diff arch/x86/include/asm/inat.h ../../arch/x86/include/asm/inat.h >/dev/null && \

	diff arch/x86/include/asm/inat_types.h ../../arch/x86/include/asm/inat_types.h >/dev/null) \

	|| echo "warning: objtool: x86 instruction decoder differs from kernel" >&2 )) || true

	@(test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \

	diff ../../arch/x86/include/asm/orc_types.h arch/x86/include/asm/orc_types.h >/dev/null) \

	|| echo "warning: objtool: orc_types.h differs from kernel" >&2 )) || true

	@./sync-check.sh

	$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@

#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

FILES='

arch/x86/lib/insn.c

arch/x86/lib/inat.c

arch/x86/lib/x86-opcode-map.txt

arch/x86/tools/gen-insn-attr-x86.awk

arch/x86/include/asm/insn.h

arch/x86/include/asm/inat.h

arch/x86/include/asm/inat_types.h

arch/x86/include/asm/orc_types.h

'

check()

{

	local file=$1

	diff $file ../../$file > /dev/null ||

		echo "Warning: synced file at 'tools/objtool/$file' differs from latest kernel version at '$file'"

}

if [ ! -d ../../kernel ] || [ ! -d ../../tools ] || [ ! -d ../objtool ]; then

	exit 0

fi

for i in $FILES; do

  check $i

done