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BUILD LINUX KERNEL 2015 Based on EPFL assignment SinhVienZone.com https://fb.com/sinhvienzonevn Prepare for disaster! SinhVienZone.com https://fb.com/sinhvienzonevn Ubuntu 12.04 in Virtual Box   https://www.youtube.com/watch?v=pUxd38Pj3r0 Note:   Hard drive: 20GB Ubuntu 64bit SinhVienZone.com https://fb.com/sinhvienzonevn Compile Kernel, the Ubuntu ways SinhVienZone.com https://fb.com/sinhvienzonevn Videos   https://www.youtube.com/watch?v=Wm3-lBW8o4s https://www.youtube.com/watch?v=cc8082h0fS0 SinhVienZone.com https://fb.com/sinhvienzonevn Tools & source code    $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  Other options:  Down load code from kernel.org  Use apt-get SinhVienZone.com https://fb.com/sinhvienzonevn Verify and checkout    $cd ubuntu-precise $git tag -l Ubuntu-lts-3.11* $git checkout -b os_assignment_1 Ubuntu-lts-3.11.015.25 SinhVienZone.com https://fb.com/sinhvienzonevn Complie    $sudo apt-get install fakeroot $sudo fakeroot debian/rules clean $sudo fakeroot debian/rules binary-headers binarygeneric SinhVienZone.com https://fb.com/sinhvienzonevn Tips on recompile process   $sudo apt-get install ccache $vi ~/.bashrc       +export CCACHE_DIR="/.ccache" +export CC="ccache gcc“ +export CXX="ccache g++" +export PATH="/usr/lib/ccache:$PATH" $source ~/.bashrc $ccache -M 4G SinhVienZone.com https://fb.com/sinhvienzonevn Voilà 10  $ls /*.deb    /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 SinhVienZone.com https://fb.com/sinhvienzonevn Make 17   $sudo make $sudo make modules_install install SinhVienZone.com https://fb.com/sinhvienzonevn Install 18   #make install Result in /boot    System.map-… config-… vmlinuz-… SinhVienZone.com https://fb.com/sinhvienzonevn initrd 19   “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-… … SinhVienZone.com https://fb.com/sinhvienzonevn grub 20  # 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 SinhVienZone.com https://fb.com/sinhvienzonevn Here it is! 21  # reboot SinhVienZone.com https://fb.com/sinhvienzonevn 22 Add system call SinhVienZone.com https://fb.com/sinhvienzonevn Your first system call! 23   Return a system wide unique identier each time it is called sys_get_unique_id (int * uuid )   uuid: location to store the unique identifier after the call return:   for success (minus) error code otherwise SinhVienZone.com https://fb.com/sinhvienzonevn System call list 24  arch/x86/syscalls/syscall_64.tbl      543 abi: 64, x32, or common entry point: sys_ arch/x86/syscalls/syscall_32.tbl  351 SinhVienZone.com https://fb.com/sinhvienzonevn Header file 25  include/linux/syscalls.h SinhVienZone.com https://fb.com/sinhvienzonevn Source code 26  get_unique_id.c: # include < linux / linkage h> asmlinkage long sys_get_unique_id (int * uuid ) { // your code } SinhVienZone.com https://fb.com/sinhvienzonevn Change Makefile 27  obj-y =  get_unique_id.o SinhVienZone.com https://fb.com/sinhvienzonevn Test 28 # include # include # include # define IS_32_BIT #if IS_32_BIT # define NR_get_unique_id 351 # else # define NR_get_unique_id 543 # endif long get_unique_id ( int* uuid ) { return syscall ( NR_get_unique_id , uuid ) ? errno : 0; } SinhVienZone.com https://fb.com/sinhvienzonevn Test (cont.) 29 int main () { int uuid ; int res; res = get_unique_id (& uuid ); printf (" Syscall returned %d, uuid is %d\n", res , uuid ); res = get_unique_id (& uuid ); printf (" Syscall returned %d, uuid is %d\n", res , uuid ); res = get_unique_id (47424742); // arbitrary memory address printf (" Syscall returned %d\n", res ); return 0; } SinhVienZone.com https://fb.com/sinhvienzonevn Need help? 30   http://moodlearchives.epfl.ch/20132014/mod/forum/view.php?id=358001 Classmates & tutors! SinhVienZone.com https://fb.com/sinhvienzonevn 31 SinhVienZone.com https://fb.com/sinhvienzonevn ... savedefault boot SinhVienZone. com https://fb .com/ sinhvienzonevn Here it is! 21  # reboot SinhVienZone. com https://fb .com/ sinhvienzonevn 22 Add system call SinhVienZone. com https://fb .com/ sinhvienzonevn... https://fb .com/ sinhvienzonevn Load new kernel 12   $sudo dpkg -i *.deb $sudo reboot SinhVienZone. com https://fb .com/ sinhvienzonevn Verify 13  $uname -a SinhVienZone. com https://fb .com/ sinhvienzonevn... https://fb .com/ sinhvienzonevn Compile Kernel, the Ubuntu ways SinhVienZone. com https://fb .com/ sinhvienzonevn Videos   https://www.youtube .com/ watch?v=Wm3-lBW8o4s https://www.youtube .com/ watch?v=cc8082h0fS0