#!/bin/bash# 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 [ "$KBUILD_VERBOSE" = "1" ]; then	set -xfi # RCS_FIND_IGNORE has escaped ()s -- remove them.ignore="$(echo "$RCS_FIND_IGNORE" | sed 's|\\||g' )"# tags and cscope files should also ignore MODVERSION *.mod.c filesignore="$ignore ( -name *.mod.c ) -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 # ignore userspace toolsignore="$ignore ( -path ${tree}tools ) -prune -o" # 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 $subarchprune $prune -name "$2" \		-not -type l -print;} # find sources in arch/$1/includefind_arch_include_sources(){	include=$(find ${tree}arch/$1/ $subarchprune \					-name include -type d -print);	if [ -n "$include" ]; then		archincludedir="$archincludedir $include"		find $include $ignore -name "$2" -not -type l -print;	fi} # find sources in include/find_include_sources(){	find ${tree}include $ignore -name config -prune -o -name "$1" \		-not -type l -print;} # find sources in rest of tree# we could benefit from a list of dirs to search in herefind_other_sources(){	find ${tree}* $ignore \	     \( -path ${tree}include -o -path ${tree}arch -o -name '.tmp_*' \) -prune -o \	       -name "$1" -not -type l -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_compiled_sources(){	for i in $(all_sources); do		case "$i" in			*.[cS])				j=${i/\.[cS]/\.o}				j="${j#$tree}"				if [ -e $j ]; then					echo $i				fi				;;			*)				echo $i				;;		esac	done} all_target_sources(){	if [ -n "$COMPILED_SOURCE" ]; then		all_compiled_sources	else		all_sources	fi} all_kconfigs(){	find ${tree}arch/ -maxdepth 1 $ignore \	       -name "Kconfig*" -not -type l -print;	for arch in $ALLSOURCE_ARCHS; do		find_sources $arch 'Kconfig*'	done	find_other_sources 'Kconfig*'} docscope(){	(echo \-k; echo \-q; all_target_sources) > cscope.files	cscope -b -f cscope.out} dogtags(){	all_target_sources | gtags -i -f -} # Basic regular expressions with an optional /kind-spec/ for ctags and# the following limitations:# - No regex modifiers# - Use \{0,1\} instead of \?, because etags expects an unescaped ?# - \s is not working with etags, use a space or [ \t]# - \w works, but does not match underscores in etags# - etags regular expressions have to match at the start of a line;#   a ^[^#] is prepended by setup_regex unless an anchor is already presentregex_asm=(	'/^\(ENTRY\|_GLOBAL\)(\([[:alnum:]_\\]*\)).*/\2/')regex_c=(	'/^SYSCALL_DEFINE[0-9](\([[:alnum:]_]*\).*/sys_\1/'	'/^COMPAT_SYSCALL_DEFINE[0-9](\([[:alnum:]_]*\).*/compat_sys_\1/'	'/^TRACE_EVENT(\([[:alnum:]_]*\).*/trace_\1/'	'/^TRACE_EVENT(\([[:alnum:]_]*\).*/trace_\1_rcuidle/'	'/^DEFINE_EVENT([^,)]*, *\([[:alnum:]_]*\).*/trace_\1/'	'/^DEFINE_EVENT([^,)]*, *\([[:alnum:]_]*\).*/trace_\1_rcuidle/'	'/^DEFINE_INSN_CACHE_OPS(\([[:alnum:]_]*\).*/get_\1_slot/'	'/^DEFINE_INSN_CACHE_OPS(\([[:alnum:]_]*\).*/free_\1_slot/'	'/^PAGEFLAG(\([[:alnum:]_]*\).*/Page\1/'	'/^PAGEFLAG(\([[:alnum:]_]*\).*/SetPage\1/'	'/^PAGEFLAG(\([[:alnum:]_]*\).*/ClearPage\1/'	'/^TESTSETFLAG(\([[:alnum:]_]*\).*/TestSetPage\1/'	'/^TESTPAGEFLAG(\([[:alnum:]_]*\).*/Page\1/'	'/^SETPAGEFLAG(\([[:alnum:]_]*\).*/SetPage\1/'	'/\<__SETPAGEFLAG(\([[:alnum:]_]*\).*/__SetPage\1/'	'/\<TESTCLEARFLAG(\([[:alnum:]_]*\).*/TestClearPage\1/'	'/\<__TESTCLEARFLAG(\([[:alnum:]_]*\).*/TestClearPage\1/'	'/\<CLEARPAGEFLAG(\([[:alnum:]_]*\).*/ClearPage\1/'	'/\<__CLEARPAGEFLAG(\([[:alnum:]_]*\).*/__ClearPage\1/'	'/^__PAGEFLAG(\([[:alnum:]_]*\).*/__SetPage\1/'	'/^__PAGEFLAG(\([[:alnum:]_]*\).*/__ClearPage\1/'	'/^PAGEFLAG_FALSE(\([[:alnum:]_]*\).*/Page\1/'	'/\<TESTSCFLAG(\([[:alnum:]_]*\).*/TestSetPage\1/'	'/\<TESTSCFLAG(\([[:alnum:]_]*\).*/TestClearPage\1/'	'/\<SETPAGEFLAG_NOOP(\([[:alnum:]_]*\).*/SetPage\1/'	'/\<CLEARPAGEFLAG_NOOP(\([[:alnum:]_]*\).*/ClearPage\1/'	'/\<__CLEARPAGEFLAG_NOOP(\([[:alnum:]_]*\).*/__ClearPage\1/'	'/\<TESTCLEARFLAG_FALSE(\([[:alnum:]_]*\).*/TestClearPage\1/'	'/^PAGE_MAPCOUNT_OPS(\([[:alnum:]_]*\).*/Page\1/'	'/^PAGE_MAPCOUNT_OPS(\([[:alnum:]_]*\).*/__SetPage\1/'	'/^PAGE_MAPCOUNT_OPS(\([[:alnum:]_]*\).*/__ClearPage\1/'	'/^TASK_PFA_TEST([^,]*, *\([[:alnum:]_]*\))/task_\1/'	'/^TASK_PFA_SET([^,]*, *\([[:alnum:]_]*\))/task_set_\1/'	'/^TASK_PFA_CLEAR([^,]*, *\([[:alnum:]_]*\))/task_clear_\1/'	'/^DEF_MMIO_\(IN\|OUT\)_[XD](\([[:alnum:]_]*\),[^)]*)/\2/'	'/^DEBUGGER_BOILERPLATE(\([[:alnum:]_]*\))/\1/'	'/^DEF_PCI_AC_\(\|NO\)RET(\([[:alnum:]_]*\).*/\2/'	'/^PCI_OP_READ(\(\w*\).*[1-4])/pci_bus_read_config_\1/'	'/^PCI_OP_WRITE(\(\w*\).*[1-4])/pci_bus_write_config_\1/'	'/\<DEFINE_\(MUTEX\|SEMAPHORE\|SPINLOCK\)(\([[:alnum:]_]*\)/\2/v/'	'/\<DEFINE_\(RAW_SPINLOCK\|RWLOCK\|SEQLOCK\)(\([[:alnum:]_]*\)/\2/v/'	'/\<DECLARE_\(RWSEM\|COMPLETION\)(\([[:alnum:]_]\+\)/\2/v/'	'/\<DECLARE_BITMAP(\([[:alnum:]_]*\)/\1/v/'	'/\(^\|\s\)\(\|L\|H\)LIST_HEAD(\([[:alnum:]_]*\)/\3/v/'	'/\(^\|\s\)RADIX_TREE(\([[:alnum:]_]*\)/\2/v/'	'/\<DEFINE_PER_CPU([^,]*, *\([[:alnum:]_]*\)/\1/v/'	'/\<DEFINE_PER_CPU_SHARED_ALIGNED([^,]*, *\([[:alnum:]_]*\)/\1/v/'	'/\<DECLARE_WAIT_QUEUE_HEAD(\([[:alnum:]_]*\)/\1/v/'	'/\<DECLARE_\(TASKLET\|WORK\|DELAYED_WORK\)(\([[:alnum:]_]*\)/\2/v/'	'/\(^\s\)OFFSET(\([[:alnum:]_]*\)/\2/v/'	'/\(^\s\)DEFINE(\([[:alnum:]_]*\)/\2/v/'	'/\<DEFINE_HASHTABLE(\([[:alnum:]_]*\)/\1/v/')regex_kconfig=(	'/^[[:blank:]]*\(menu\|\)config[[:blank:]]\+\([[:alnum:]_]\+\)/\2/'	'/^[[:blank:]]*\(menu\|\)config[[:blank:]]\+\([[:alnum:]_]\+\)/CONFIG_\2/')setup_regex(){	local mode=$1 lang tmp=() r	shift 	regex=()	for lang; do		case "$lang" in		asm)       tmp=("${regex_asm[@]}") ;;		c)         tmp=("${regex_c[@]}") ;;		kconfig)   tmp=("${regex_kconfig[@]}") ;;		esac		for r in "${tmp[@]}"; do			if test "$mode" = "exuberant"; then				regex[${#regex[@]}]="--regex-$lang=${r}b"			else				# Remove ctags /kind-spec/				case "$r" in				/*/*/?/)					r=${r%?/}				esac				# Prepend ^[^#] unless already anchored				case "$r" in				/^*) ;;				*)					r="/^[^#]*${r#/}"				esac				regex[${#regex[@]}]="--regex=$r"			fi		done	done} exuberant(){	setup_regex exuberant asm c	all_target_sources | xargs $1 -a                        \	-I __initdata,__exitdata,__initconst,			\	-I __initdata_memblock					\	-I __refdata,__attribute,__maybe_unused,__always_unused \	-I __acquires,__releases,__deprecated			\	-I __read_mostly,__aligned,____cacheline_aligned        \	-I ____cacheline_aligned_in_smp                         \	-I __cacheline_aligned,__cacheline_aligned_in_smp	\	-I ____cacheline_internodealigned_in_smp                \	-I __used,__packed,__packed2__,__must_check,__must_hold	\	-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL,ACPI_EXPORT_SYMBOL   \	-I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \	-I static,const						\	--extra=+fq --c-kinds=+px --fields=+iaS --langmap=c:+.h \	"${regex[@]}" 	setup_regex exuberant kconfig	all_kconfigs | xargs $1 -a                              \	--langdef=kconfig --language-force=kconfig "${regex[@]}" } emacs(){	setup_regex emacs asm c	all_target_sources | xargs $1 -a "${regex[@]}" 	setup_regex emacs kconfig	all_kconfigs | xargs $1 -a "${regex[@]}"} 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_target_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=${SUBARCH}	fielif [ "${SRCARCH}" = "arm" -a "${SUBARCH}" != "" ]; then	subarchdir=$(find ${tree}arch/$SRCARCH/ -name "mach-*" -type d -o \							-name "plat-*" -type d);	mach_suffix=$SUBARCH	plat_suffix=$SUBARCH 	# Special cases when $plat_suffix != $mach_suffix	case $mach_suffix in		"omap1" | "omap2")			plat_suffix="omap"			;;	esac 	if [ ! -d ${tree}arch/$SRCARCH/mach-$mach_suffix ]; then		echo "Warning: arch/arm/mach-$mach_suffix/ not found." >&2		echo "         Fix your \$SUBARCH appropriately" >&2	fi 	for i in $subarchdir; do		case "$i" in			*"mach-"${mach_suffix})				;;			*"plat-"${plat_suffix})				;;			*)				subarchprune="$subarchprune \						-wholename $i -prune -o"				;;		esac	donefi remove_structs=case "$1" in	"cscope")		docscope		;; 	"gtags")		dogtags		;; 	"tags")		rm -f tags		xtags ctags		remove_structs=y		;; 	"TAGS")		rm -f TAGS		xtags etags		remove_structs=y		;;esac # Remove structure forward declarations.if [ -n "$remove_structs" ]; then    LANG=C sed -i -e '/^\([a-zA-Z_][a-zA-Z0-9_]*\)\t.*\t\/\^struct \1;.*\$\/;"\tx$/d' $1fi