#!/bin/sh# Generate tags or cscope files# Usage tags.sh <mode>## mode may be any of: tags, TAGS, cscope## Uses the following environment variables:# ARCH, SUBARCH, SRCARCH, srctree, src, obj if [ "$KBUILD_VERBOSE" = "1" ]; then	set -xfi # This is a duplicate of RCS_FIND_IGNORE without escaped '()'ignore="( -name SCCS -o -name BitKeeper -o -name .svn -o \          -name CVS  -o -name .pc       -o -name .hg  -o \          -name .git )                                   \          -prune -o" # Do not use full path if we do not use O=.. builds# Use make O=. {tags|cscope}# to force full paths for a non-O= buildif [ "${KBUILD_SRC}" = "" ]; then	tree=else	tree=${srctree}/fi # Find all available archsfind_all_archs(){	ALLSOURCE_ARCHS=""	for arch in `ls ${tree}arch`; do		ALLSOURCE_ARCHS="${ALLSOURCE_ARCHS} "${arch##\/}	done} # Detect if ALLSOURCE_ARCHS is set. If not, we assume SRCARCHif [ "${ALLSOURCE_ARCHS}" = "" ]; then	ALLSOURCE_ARCHS=${SRCARCH}elif [ "${ALLSOURCE_ARCHS}" = "all" ]; then	find_all_archsfi # find sources in arch/$ARCHfind_arch_sources(){	for i in $archincludedir; do		prune="$prune -wholename $i -prune -o"	done	find ${tree}arch/$1 $ignore $prune -name "$2" -print;} # find sources in arch/$1/includefind_arch_include_sources(){	include=$(find ${tree}arch/$1/ -name include -type d);	if [ -n "$include" ]; then		archincludedir="$archincludedir $include"		find $include $ignore -name "$2" -print;	fi} # find sources in include/find_include_sources(){	find ${tree}include $ignore -name config -prune -o -name "$1" -print;} # find sources in rest of tree# we could benefit from a list of dirs to search in herefind_other_sources(){	find ${tree}* $ignore \	     \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \	       -name "$1" -print;} find_sources(){	find_arch_sources $1 "$2"} all_sources(){	find_arch_include_sources ${SRCARCH} '*.[chS]'	if [ ! -z "$archinclude" ]; then		find_arch_include_sources $archinclude '*.[chS]'	fi	find_include_sources '*.[chS]'	for arch in $ALLSOURCE_ARCHS	do		find_sources $arch '*.[chS]'	done	find_other_sources '*.[chS]'} all_kconfigs(){	for arch in $ALLSOURCE_ARCHS; do		find_sources $arch 'Kconfig*'	done	find_other_sources 'Kconfig*'} all_defconfigs(){	find_sources $ALLSOURCE_ARCHS "defconfig"} docscope(){	(echo \-k; echo \-q; all_sources) > cscope.files	cscope -b -f cscope.out} dogtags(){	all_sources | gtags -f -} exuberant(){	all_sources | xargs $1 -a                               \	-I __initdata,__exitdata,__acquires,__releases          \	-I __read_mostly,____cacheline_aligned                  \	-I ____cacheline_aligned_in_smp                         \	-I ____cacheline_internodealigned_in_smp                \	-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL                      \	-I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \	--extra=+f --c-kinds=+px                                \	--regex-asm='/^ENTRY\(([^)]*)\).*/\1/'                  \	--regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \	--regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/'		\	--regex-c++='/^DEFINE_EVENT\([^,)]*, *([^,)]*).*/trace_\1/' 	all_kconfigs | xargs $1 -a                              \	--langdef=kconfig --language-force=kconfig              \	--regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/' 	all_kconfigs | xargs $1 -a                              \	--langdef=kconfig --language-force=kconfig              \	--regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/CONFIG_\2/' 	all_defconfigs | xargs -r $1 -a                         \	--langdef=dotconfig --language-force=dotconfig          \	--regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/' } emacs(){	all_sources | xargs $1 -a                               \	--regex='/^ENTRY(\([^)]*\)).*/\1/'                      \	--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'   \	--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/'		\	--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/' 	all_kconfigs | xargs $1 -a                              \	--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/' 	all_kconfigs | xargs $1 -a                              \	--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/CONFIG_\3/' 	all_defconfigs | xargs -r $1 -a                         \	--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'} xtags(){	if $1 --version 2>&1 | grep -iq exuberant; then		exuberant $1	elif $1 --version 2>&1 | grep -iq emacs; then		emacs $1	else		all_sources | xargs $1 -a        fi}  # Support um (which uses SUBARCH)if [ "${ARCH}" = "um" ]; then	if [ "$SUBARCH" = "i386" ]; then		archinclude=x86	elif [ "$SUBARCH" = "x86_64" ]; then		archinclude=x86	else		archinclude=${SUBARCH}	fifi case "$1" in	"cscope")		docscope		;; 	"gtags")		dogtags		;; 	"tags")		rm -f tags		xtags ctags		;; 	"TAGS")		rm -f TAGS		xtags etags		;;esac