kỹ thuật điện hệ điều hành os+thí nghiệm +build+kernel+pub sinhvienzone com

BUILD LINUX KERNEL
2015

Based on EPFL assignment

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Prepare for disaster!

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Ubuntu 12.04 in Virtual Box
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/>Note:
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Hard drive: 20GB
Ubuntu 64bit

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Compile Kernel, the Ubuntu ways

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Videos
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Tools & source code
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$sudo apt-get install dpkg-dev git

$sudo apt-get build-dep linux-image-$(uname -r)
$git clone git://kernel.ubuntu.com/ubuntu/ubuntuprecise.git
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Other options:
 Down

load code from kernel.org
 Use apt-get

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Verify and checkout
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$cd ubuntu-precise
$git tag -l Ubuntu-lts-3.11*
$git checkout -b os_assignment_1 Ubuntu-lts-3.11.015.25

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Complie

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$sudo apt-get install fakeroot
$sudo fakeroot debian/rules clean
$sudo fakeroot debian/rules binary-headers binarygeneric

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Tips on recompile process
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$sudo apt-get install ccache
$vi ~/.bashrc
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+export CCACHE_DIR="<your home directory>/.ccache"
+export CC="ccache gcc“
+export CXX="ccache g++"
+export PATH="/usr/lib/ccache:$PATH"

$source ~/.bashrc
$ccache -M 4G

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Voilà
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$ls ../*.deb
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../linux-headers-3.11.0-15-generic_3.11.015.25~precise1_amd64.deb
../linux-image-3.11.0-15-generic_3.11.015.25~precise1_amd64.deb
../linux-tools-3.11.0-15-generic_3.11.015.25~precise1_amd64.deb

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Instal headers
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../linux-headers-3.11.0-15_3.11.015.25~precise1_all.deb
$sudo apt-get install linux-lts-saucy-tools-3.11.0-15

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Load new kernel
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$sudo dpkg -i *.deb
$sudo reboot

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Verify

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$uname -a

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Compile kernel, geeky ways

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Get kernel source
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$uname –a
$wget />$tar xjvf 3.11.5.tar.xz

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Config
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$sudo apt-get install ncurses-dev
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Ncurse: toolkit for developing "GUI-like" application software that
runs under a terminal emulator.

$sudo make menuconfig
(Use old config: sudo make oldconfig)

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Make
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$sudo make
$sudo make modules_install install

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Install
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#make install
Result in /boot
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System.map-…
config-…
vmlinuz-…

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initrd
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“initrd images contains device driver which needed to
load rest of the operating system later on. Not all
computer requires initrd, but it is safe to create one”
# cd /boot
# mkinitrd -o initrd.img-… …

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grub
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# vi /boot/grub/menu.lst
title
Debian GNU/Linux, kernel … Default
root
(hd0,0)
kernel
/boot/vmlinuz root=/dev/hdb1 ro
initrd
/boot/initrd.img-…
savedefault
boot

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Here it is!
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# reboot

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Add system call

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Your first system call!
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Return a system wide unique identier each time it is
called
sys_get_unique_id (int * uuid )
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uuid: location to store the unique identifier after the call

return:
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0 for success
(minus) error code otherwise

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System call list
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arch/x86/syscalls/syscall_64.tbl
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543
<number> <abi> <name> <entry point>
abi: 64, x32, or common
entry point: sys_

arch/x86/syscalls/syscall_32.tbl
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351

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Header file
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include/linux/syscalls.h

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