Use vim/cscope/ctags to navigate linux kernel

Install cscope:

sudo apt-get install cscope exuberant-ctags

Generate cscope and ctag file for x86:

##################################

#!/bin/bash

# File name: genctags.sh

# Usage: genctags.sh x86

LNX=.

ARCH=x86

if [ ! -z "$1" ];then

ARCH="$1"

fi

if [ "$2" != "tag" ];then

echo "Gen cscope file for $ARCH ..."

find $LNX \

-path "$LNX/arch/*" ! -path "$LNX/arch/$ARCH*" -prune -o \

-path "$LNX/include/asm-*" ! -path "$LNX/include/asm-$ARCH*" -prune -o \

-path "$LNX/tmp*" -prune -o \

-path "$LNX/Documentation*" -prune -o \

-path "$LNX/scripts*" -prune -o \

-path "$LNX/drivers*" -prune -o \

-name "*.[chxsS]" -print > cscope.files

cscope -b -q -k

fi

echo "Gen ctags file ($ARCH)..."

EXCLUDE_PATH=`find . -path "$LNX/arch/*" ! -path "$LNX/arch/$ARCH*" -prune`

EXCLUDE_PATH2=

for path in $EXCLUDE_PATH

do

EXCLUDE_PATH2="$EXCLUDE_PATH2 --exclude=$path"

done

ctags -R $EXCLUDE_PATH2

###############################################

For vim:

Download http://cscope.sourceforge.net/cscope_maps.vim to ~/.vim/plugin/

try it:

vim ./init/main.c

move the cursor to a symbol then...

ctrl + ] -- goto definition

[ + d -- show macro definition (if it is a macro)

ctrl + o -- goto previous position

ctrl + i -- goto next position

ctrl + \ s -- list usages

ctrl + shift + space -- list usages and pops a select to a new window (ctrl+w o to close)

search tag "main":

: ta main

search tags including "main":

:ta /main

search tags beginning with "main":

:ta /^main

Ref:

http://adrianhuang.blogspot.com/2007/09/trace-code-gvimctagscscope.html

http://cscope.sourceforge.net/large_projects.html

http://cscope.sourceforge.net/cscope_vim_tutorial.html

http://tnerual.eriogerg.free.fr/vimqrc.html

http://www.thegeekstuff.com/2009/04/ctags-taglist-vi-vim-editor-as-sourece-code-browser/