wiki:Dev/KernelHack/COINS/worklog/201109

09/14

download kernel source and build

  • windell57:linux s0711489$ wget https://github.com/torvalds/linux/tarball/v2.6.35 -O torvalds-linux-v2.6.35-0-g9fe6206.tar.gz --no-check-certificate
  • windell57:linux s0711489$ tar xzfv torvalds-linux-v2.6.35-0-g9fe6206.tar.gz
  • windell57:linux s0711489$ cd torvalds-linux-d786bf1/
  • windell57:torvalds-linux-d786bf1 s0711489$ export INSTALL_PATH=/home/ugrad/07/s0711489/build/boot/
  • windell57:torvalds-linux-d786bf1 s0711489$ export INSTALL_MOD_PATH=/home/ugrad/07/s0711489/build/
  • windell57:torvalds-linux-d786bf1 s0711489$ make defconfig
  • windell57:torvalds-linux-d786bf1 s0711489$ make menuconfig
    • 記録忘れ
    • 覚えている限りだと、
      • Networking support からIPv6とWirelessなどの削除
      • Device Drivers へdevtmpfsとSCSI low-level driversのBusLogic SCSI supportの導入
      • File systems からNetwork File Systemsの削除
      • Kernel hacking へCompile the kernel with debug infoの導入
      • Virtualizationの削除
  • windell57:torvalds-linux-d786bf1 s0711489$ make -j2
  • windell57:torvalds-linux-d786bf1 s0711489$ make modules
  • windell57:torvalds-linux-d786bf1 s0711489$ make install
    sh /tmp/linux/torvalds-linux-d786bf1/arch/x86/boot/install.sh 2.6.35 arch/x86/boot/bzImage \
                    System.map "/home/ugrad/07/s0711489/build/boot/"
    ln: `/home/ugrad/07/s0711489/build/boot///home/ugrad/07/s0711489/build/boot//System.map-2.6.35' へのシンボリックリンク `/boot/System.map' を作成します: 許可がありません
    ln: `/home/ugrad/07/s0711489/build/boot///home/ugrad/07/s0711489/build/boot//vmlinuz-2.6.35' へのシンボリックリンク `/boot/vmlinuz' を作成します: 許可がありません
    ln: `/home/ugrad/07/s0711489/build/boot///home/ugrad/07/s0711489/build/boot//System.map-2.6.35' へのシンボリックリンク `/boot/System.map' を作成します: 許可がありません
    
    • どうやら環境変数を指定してのmake installは古いやり方らしく(?)、一部エラーとなる
  • windell57:torvalds-linux-d786bf1 s0711489$ make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL lib/crc16.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35
    

packaging kernel

  • ~/build にコピーされた物をとりあえずtarballにし、ゲストOSにscpする
  • windell57:build s0711489$ tar czf kernel-2.6.35.tar.gz *
  • windell57:build s0711489$ scp kernel-2.6.35.tar.gz user@172.16.237.130:~
    user@172.16.237.130's password:
    kernel-2.6.35.tar.gz                          100% 8326KB   8.1MB/s   00:00
    

install kernel

  • user@ubuntu:~$ sudo cp kernel-2.6.35.tar.gz /
  • user@ubuntu:/$ sudo tar xzf kernel-2.6.35.tar.gz
  • user@ubuntu:/$ sudo mkinitramfs -o /boot/initrd.img-2.6.35 2.6.35
  • user@ubuntu:/$ sudo vim /etc/default/grub
    # GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=false
    
  • user@ubuntu:/$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.35.old
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    

結論

  • 起動には成功
  • NICのドライバ(PCnet32)を設定し忘れたため、ゲスト側でNICが使えずはまる(気づかずにこの日を終える)
  • gdbを使ったリモートデバッグの動作確認もOK
    • windell57:torvalds-linux-d786bf1 s0711489$ gdb
      (gdb) file vmlinux
      Reading symbols from /tmp/linux/torvalds-linux-d786bf1/vmlinux...(no debugging symbols found)...done.
      (gdb) target remote localhost:8832
      Remote debugging using localhost:8832
      0xc1007c23 in native_safe_halt ()
          at /tmp/linux/torvalds-linux-d786bf1/arch/x86/include/asm/irqflags.h:49
      49              asm volatile("sti; hlt": : :"memory");
      (gdb) n
      default_idle () at arch/x86/kernel/process.c:386
      386                     current_thread_info()->status |= TS_POLLING;
      (gdb)
      392     }
      (gdb)
      cpu_idle () at arch/x86/kernel/process_32.c:101
      101                     while (!need_resched()) {
      (gdb)
      115                     tick_nohz_restart_sched_tick();
      (gdb)
      117                     schedule();
      (gdb)
      100                     tick_nohz_stop_sched_tick(1);
      (gdb)
      101                     while (!need_resched()) {
      (gdb)
      115                     tick_nohz_restart_sched_tick();
      (gdb)
      117                     schedule();
      (gdb)
      100                     tick_nohz_stop_sched_tick(1);
      (gdb) detach
      Ending remote debugging.
      (gdb) quit
      

09/15

  • 方針
    • ゲスト上でビルドすると遅いので、ホスト上でビルドしたソースツリーをVMwareのHGFSを使ってゲスト上にマウントし、そこからsudo make installする

build kernel on Guest

  • 比較対象として、同時並行でゲスト上でビルド&インストールも行ってみた
  • mitty@ubuntu-lucid:~$ sudo aptitude update
  • mitty@ubuntu-lucid:~$ sudo aptitude install build-essential kernel-package libncurses-dev
    Note: selecting "libncurses5-dev" instead of the
          virtual package "libncurses-dev"
    The following NEW packages will be installed:
      binutils{a} build-essential cvs{a} dpkg-dev{a} fakeroot{a} g++{a}
      g++-4.4{a} gcc{a} gcc-4.4{a} gettext{a} intltool-debian{a} kernel-package
      libc-dev-bin{a} libc6-dev{a} libcroco3{a} libfile-copy-recursive-perl{a}
      libgomp1{a} liblzma1{a} libmail-sendmail-perl{a} libncurses5-dev
      libstdc++6-4.4-dev{a} libsys-hostname-long-perl{a} linux-libc-dev{a}
      manpages-dev{a} patch{a} po-debconf{a} update-inetd{a} xz-utils{a}
    0 packages upgraded, 28 newly installed, 0 to remove and 0 not upgraded.
    Need to get 25.7MB of archives. After unpacking 88.4MB will be used.
    
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ make defconfig
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ make menuconfig
    • 設定内容については後述
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ make
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ make modules
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ sudo make install
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ sudo make modules_install
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ sudo mkinitramfs -o /boot/initrd.img-2.6.35 2.6.35
  • mitty@ubuntu-lucid:~/kernel/mirrors-linux-d786bf1$ sudo update-grub
  • mitty@ubuntu-lucid:~$ sudo reboot
  • mitty@ubuntu-lucid:~$ uname -a
    Linux ubuntu-lucid 2.6.35 #3 SMP Fri Sep 16 15:01:05 JST 2011 i686 GNU/Linux
    
    • ビルド成功
    • ただ、ホスト側にはソースツリーが無いので、このままではリモートデバッグ出来ない

build kernel on Host

install packages to Guest

  • s0711489@ubuntu-lucid:~$ sudo aptitude update
  • s0711489@ubuntu-lucid:~$ sudo aptitude install build-essential kernel-package libncurses-dev
    Note: selecting "libncurses5-dev" instead of the
          virtual package "libncurses-dev"
    The following NEW packages will be installed:
      binutils{a} build-essential cvs{a} dpkg-dev{a} fakeroot{a} g++{a}
      g++-4.4{a} gcc{a} gcc-4.4{a} gettext{a} intltool-debian{a} kernel-package
      libc-dev-bin{a} libc6-dev{a} libcroco3{a} libfile-copy-recursive-perl{a}
      libgomp1{a} liblzma1{a} libmail-sendmail-perl{a} libncurses5-dev
      libstdc++6-4.4-dev{a} libsys-hostname-long-perl{a} linux-libc-dev{a}
      manpages-dev{a} patch{a} po-debconf{a} update-inetd{a} xz-utils{a}
    0 packages upgraded, 28 newly installed, 0 to remove and 0 not upgraded.
    Need to get 25.7MB of archives. After unpacking 88.4MB will be used.
    

install VMware Tools

  • s0711489@ubuntu-lucid:~$ sudo mount /dev/cdrom /media/
  • s0711489@ubuntu-lucid:~$ tar xzf /media/VMwareTools-8.4.6-385536.tar.gz
  • s0711489@ubuntu-lucid:~/vmware-tools-distrib$ sudo ./vmware-install.pl --default

download kernel source and build

  • windell57:mirrors-linux-d786bf1 s0711489$ make defconfig
  • windell57:mirrors-linux-d786bf1 s0711489$ make menuconfig
      │ │                [*] Networking support  --->                                                           │ │
      │ │                      Networking options  --->                                                         │ │
      │ │                < >   The IPv6 protocol  --->                                                          │ │
      │ │                [ ]   Amateur Radio support  --->                                                      │ │
      │ │                -*-   Wireless  --->                                                                   │ │
      │ │                < >   cfg80211 - wireless configuration API                                            │ │
      │ │                < >   RF switch subsystem support  --->                                                │ │
      │ │                    Device Drivers  --->                                                               │ │
      │ │                    Generic Driver Options  --->                                                       │ │
      │ │                [*] Maintain a devtmpfs filesystem to mount at /dev                                    │ │
      │ │                [*]   Automount devtmpfs at /dev, after the kernel mounted the rootfs                  │ │
      │ │                    SCSI device support  --->                                                          │ │
      │ │                [*] SCSI low-level drivers  --->                                                       │ │
      │ │                <*>   BusLogic SCSI support                                                            │ │
      │ │                [*] Network device support  --->                                                       │ │
      │ │                [*]   Ethernet (10 or 100Mbit)  --->                                                   │ │
      │ │                <*>     AMD PCnet32 PCI support                                                        │ │
      │ │                    File systems  --->                                                                 │ │
      │ │                <*> The Extended 4 (ext4) filesystem                                                   │ │
      │ │                [ ] Network File Systems  --->                                                         │ │
      │ │                    Kernel hacking  --->                                                               │ │
      │ │                [*] Compile the kernel with debug info                                                 │ │
      │ │                [ ] Virtualization  --->                                                               │ │
    
  • windell57:mirrors-linux-d786bf1 s0711489$ make -j2
  • windell57:mirrors-linux-d786bf1 s0711489$ make modules

make install on Guest

  • s0711489@ubuntu-lucid:~$ cd /mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1/
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ sudo make install
    sh /mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1/arch/x86/boot/install.sh 2.6.35 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL fs/ext4/ext4.ko
      INSTALL fs/jbd2/jbd2.ko
      INSTALL lib/crc16.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ sudo mkinitramfs -o /boot/initrd.img-2.6.35 2.6.35
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.35.old
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    

reboot

  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ uname -a
    Linux ubuntu-lucid 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:08:37 UTC 2011 i686 GNU/Linux
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.35/mirrors-linux-d786bf1$ sudo reboot
  • 起動しない
    • 注: 後日同じ(と思われる)手順で繰り返したところ、再現せず問題なく起動した

retry with 2.6.32

  • windell57:mirrors-linux-459b3d5 s0711489$ make defconfig
  • windell57:mirrors-linux-459b3d5 s0711489$ make menuconfig
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5$ sudo make install
    sh /mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5/arch/x86/boot/install.sh 2.6.32 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      DEPMOD  2.6.32
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5$ sudo mkinitramfs -o /boot/initrd.img-2.6.32 2.6.32
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.35.old
    Found initrd image: /boot/initrd.img-2.6.35
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found linux image: /boot/vmlinuz-2.6.32
    Found initrd image: /boot/initrd.img-2.6.32
    Found memtest86+ image: /boot/memtest86+.bin
    done
    
  • s0711489@ubuntu-lucid:~$ uname -a
    Linux ubuntu-lucid 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:08:37 UTC 2011 i686 GNU/Linux
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-v2.6.32/mirrors-linux-459b3d5$ sudo reboot
  • s0711489@ubuntu-lucid:~$ uname -a
    Linux ubuntu-lucid 2.6.32 #1 SMP Fri Sep 16 15:49:51 JST 2011 i686 GNU/Linux
    
    • 今度は起動成功

結論

  • 2.6.35で何故失敗したかは不明(再現しなかった)
  • makeにかかる時間が長すぎるので、violaを使ってビルドする方法を探る

09/17

  • 高速なviolaを用いてビルドする
    • Xeon X5570 * 2, 12GB memory

remake Ubuntu Guest

  • 何度もkernelの導入を試してごちゃごちゃしてきてしまったので、一度再インストールしてVMのスナップショットを取っておく
  • s0711489@ubuntu-lucid:~$ sudo aptitude install -R vim screen subversion
  • s0711489@ubuntu-lucid:~$ sudo update-alternatives --config editor
  • s0711489@ubuntu-lucid:~$ sudo visudo
  • s0711489@ubuntu-lucid:~$ sudo aptitude install build-essential kernel-package libncurses-dev
  • s0711489@ubuntu-lucid:~$ sudo mount /dev/cdrom /media
  • s0711489@ubuntu-lucid:~$ tar xzf /media/VMwareTools-8.4.6-385536.tar.gz
  • s0711489@ubuntu-lucid:~/vmware-tools-distrib$ sudo ./vmware-install.pl --default

build kernel on viola

  • viola06:linux s0711489$ sha1sum -b mirrors-linux-v2.6.32-0-g22763c5.tar.gz
    61a48874ea6e0887e0bd89505b80d590a63175c4 *mirrors-linux-v2.6.32-0-g22763c5.tar.gz
    
  • viola06:mirrors-linux-459b3d5 s0711489$ make defconfig
  • viola06:mirrors-linux-459b3d5 s0711489$ make menuconfig
    • 前回と同じ
  • viola06:mirrors-linux-459b3d5 s0711489$ make -j 16
  • viola06:mirrors-linux-459b3d5 s0711489$ make modules

make install on Guest

  • s0711489@ubuntu-lucid:/mnt/hgfs/mirrors-linux-459b3d5$ sudo make install
      HOSTCC  scripts/basic/fixdep
      HOSTCC  scripts/basic/docproc
      HOSTCC  scripts/basic/hash
      HOSTCC  scripts/kconfig/conf.o
    scripts/kconfig/conf.c: In function ‘conf_askvalue’:
    scripts/kconfig/conf.c:105: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
    scripts/kconfig/conf.c: In function ‘conf_choice’:
    scripts/kconfig/conf.c:307: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
      HOSTCC  scripts/kconfig/kxgettext.o
      HOSTCC  scripts/kconfig/zconf.tab.o
      HOSTLD  scripts/kconfig/conf
    scripts/kconfig/conf -s arch/x86/Kconfig
    *
    * Restart config...
    *
    *
    * RCU Subsystem
    *
    RCU Implementation
    > 1. Tree-based hierarchical RCU (TREE_RCU)
    choice[1]: 1
    Enable tracing for RCU (RCU_TRACE) [N/y/?] n
    Tree-based hierarchical RCU fanout value (RCU_FANOUT) [32] (NEW)
    
    • うまくいかない
      • violaはwindellと違い、x86_64版のCentOSだったため、そのままビルドすると64bitカーネルになっていた
    • ゲスト上でmake menuconfig & makeし直すと起動する

setup x64 version of Ubuntu

  • s0711489@ubuntu-lucid64:~$ sudo aptitude install -R vim screen subversion
  • s0711489@ubuntu-lucid64:~$ sudo update-alternatives --config editor
  • s0711489@ubuntu-lucid64:~$ sudo visudo
  • s0711489@ubuntu-lucid64:~$ sudo aptitude install build-essential kernel-package libncurses-dev
  • s0711489@ubuntu-lucid64:~$ sudo mount /dev/cdrom /media
  • s0711489@ubuntu-lucid64:~$ tar xzf /media/VMwareTools-8.4.6-385536.tar.gz
  • s0711489@ubuntu-lucid64:~/vmware-tools-distrib$ sudo ./vmware-install.pl --default
  • s0711489@ubuntu-lucid64:/mnt/hgfs/mirrors-linux-459b3d5$ sudo make install
    sh /mnt/hgfs/mirrors-linux-459b3d5/arch/x86/boot/install.sh 2.6.32 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid64:/mnt/hgfs/mirrors-linux-459b3d5$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      DEPMOD  2.6.32
    
  • s0711489@ubuntu-lucid64:/mnt/hgfs/mirrors-linux-459b3d5$ sudo mkinitramfs -o /boot/initrd.img-2.6.32 2.6.32
  • s0711489@ubuntu-lucid64:/mnt/hgfs/mirrors-linux-459b3d5$ sudo vim /etc/default/grub
    #GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=false
    
  • s0711489@ubuntu-lucid64:/mnt/hgfs/mirrors-linux-459b3d5$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found linux image: /boot/vmlinuz-2.6.32
    Found initrd image: /boot/initrd.img-2.6.32
    Found memtest86+ image: /boot/memtest86+.bin
    done
    
  • s0711489@ubuntu-lucid64:~$ uname -a
    Linux ubuntu-lucid64 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:07:13 UTC 2011 x86_64 GNU/Linux
    
  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • 起動しない

install Fusion-MPT SCSI device

  • 64bitゲストではBusLogicが使用出来ないため、VM作成時デフォルトではLSI Logicとなるが、具体的には以下のデバイスにHDDが接続されている形となる
    • s0711489@ubuntu-lucid64:~$ lspci
      00:10.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 01)
      
  • 以下のドライバを新たに導入する(ついでにBuslogicのドライバは削除しておく)
  • viola06:mirrors-linux-459b3d5 s0711489$ make menuconfig
      │ │        Device Drivers  --->                                         │ │
      │ │        SCSI device support  --->                                    │ │
      │ │    [ ] SCSI low-level drivers  --->                                 │ │
      │ │    [*] Fusion MPT device support  --->                              │ │
      │ │    <*>   Fusion MPT ScsiHost drivers for SPI                        │ │
    
  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • s0711489@ubuntu-lucid64:~$ uname -a
    Linux ubuntu-lucid64 2.6.32 #3 SMP Sat Sep 17 14:16:07 JST 2011 x86_64 GNU/Linux
    
    • ビルド成功

09/25

a whole build with Vanilla Kernel 2.6.35

  • x86_64はviola、i386はwindellでビルド

check signature of kernel source

  • mitty@ubuntu64:~$ gpg --keyserver wwwkeys.pgp.net --recv-keys 0x517D0F0E
    gpg: requesting key 517D0F0E from hkp server wwwkeys.pgp.net
    gpg: /home/mitty/.gnupg/trustdb.gpg: trustdb created
    gpg: key 517D0F0E: public key "Linux Kernel Archives Verification Key <ftpadmin@kernel.org>" imported
    gpg: no ultimately trusted keys found
    gpg: Total number processed: 1
    gpg:               imported: 1
    
  • mitty@ubuntu64:~/vendor/KernelHack$ gpg --verify linux-2.6.35.14.tar.gz.sign linux-2.6.35.14.tar.gz
    gpg: Signature made Tue 02 Aug 2011 06:36:48 AM JST using DSA key ID 517D0F0E
    gpg: Good signature from "Linux Kernel Archives Verification Key <ftpadmin@kernel.org>"
    gpg: WARNING: This key is not certified with a trusted signature!
    gpg:          There is no indication that the signature belongs to the owner.
    Primary key fingerprint: C75D C40A 11D7 AF88 9981  ED5B C86B A06A 517D 0F0E
    

extract source tarball

  • viola05:KernelHack s0711489$ tar xzf linux-2.6.35.14.tar.gz
  • viola05:KernelHack s0711489$ mv linux-2.6.35.14/ x86_64
  • viola05:KernelHack s0711489$ tar xzf linux-2.6.35.14.tar.gz
  • viola05:KernelHack s0711489$ mv linux-2.6.35.14/ i386
  • viola05:KernelHack s0711489$ mkdir linux-2.6.35.14
  • viola05:KernelHack s0711489$ mv x86_64 i386 linux-2.6.35.14/

make defconfig

  • windell57:i386 s0711489$ make defconfig
      HOSTCC  scripts/basic/fixdep
      HOSTCC  scripts/basic/docproc
      HOSTCC  scripts/basic/hash
      HOSTCC  scripts/kconfig/conf.o
      HOSTCC  scripts/kconfig/kxgettext.o
      SHIPPED scripts/kconfig/zconf.tab.c
      SHIPPED scripts/kconfig/lex.zconf.c
      SHIPPED scripts/kconfig/zconf.hash.c
      HOSTCC  scripts/kconfig/zconf.tab.o
      HOSTLD  scripts/kconfig/conf
    *** Default configuration is based on 'i386_defconfig'
    #
    # configuration written to .config
    #
    
  • viola05:x86_64 s0711489$ make defconfig
      HOSTCC  scripts/basic/fixdep
      HOSTCC  scripts/basic/docproc
      HOSTCC  scripts/basic/hash
      HOSTCC  scripts/kconfig/conf.o
      HOSTCC  scripts/kconfig/kxgettext.o
      SHIPPED scripts/kconfig/zconf.tab.c
      SHIPPED scripts/kconfig/lex.zconf.c
      SHIPPED scripts/kconfig/zconf.hash.c
      HOSTCC  scripts/kconfig/zconf.tab.o
      HOSTLD  scripts/kconfig/conf
    *** Default configuration is based on 'x86_64_defconfig'
    #
    # configuration written to .config
    #
    

make menuconfig

x86_64

  • viola05:x86_64 s0711489$ make menuconfig
      HOSTCC  scripts/kconfig/lxdialog/checklist.o
      HOSTCC  scripts/kconfig/lxdialog/inputbox.o
      HOSTCC  scripts/kconfig/lxdialog/menubox.o
      HOSTCC  scripts/kconfig/lxdialog/textbox.o
      HOSTCC  scripts/kconfig/lxdialog/util.o
      HOSTCC  scripts/kconfig/lxdialog/yesno.o
      HOSTCC  scripts/kconfig/mconf.o
      HOSTLD  scripts/kconfig/mconf
    scripts/kconfig/mconf arch/x86/Kconfig
    
     .config - Linux Kernel v2.6.35.14 Configuration
    
      │ │          [*] Networking support  --->                                                    │ │
      │ │                Networking options  --->                                                  │ │
      │ │          < >   The IPv6 protocol  --->                                                   │ │
      │ │          [ ]   Amateur Radio support  --->                                               │ │
      │ │          -*-   Wireless  --->                                                            │ │
      │ │          < >   cfg80211 - wireless configuration API                                     │ │
      │ │          < >   RF switch subsystem support  --->                                         │ │
      │ │              Device Drivers  --->                                                        │ │
      │ │              Generic Driver Options  --->                                                │ │
      │ │          [*] Maintain a devtmpfs filesystem to mount at /dev                             │ │
      │ │          [*]   Automount devtmpfs at /dev, after the kernel mounted the rootfs           │ │
      │ │          [ ] Multiple devices driver support (RAID and LVM)  --->                        │ │
      │ │          [*] Fusion MPT device support  --->                                             │ │
      │ │          <*>   Fusion MPT ScsiHost drivers for SPI                                       │ │
      │ │          [ ] Macintosh device drivers  --->                                              │ │
      │ │          [*] Network device support  --->                                                │ │
      │ │          [*]   Ethernet (10 or 100Mbit)  --->                                            │ │
      │ │          <*>     AMD PCnet32 PCI support                                                 │ │
      │ │          [ ]   Ethernet (1000 Mbit)  --->                                                │ │
      │ │          [ ]   Ethernet (10000 Mbit)  --->                                               │ │
      │ │          < >   Token Ring driver support  --->                                           │ │
      │ │          [ ]   Wireless LAN  --->                                                        │ │
      │ │          [ ]   PCMCIA network device support  --->                                       │ │
      │ │          < >   FDDI driver support                                                       │ │
      │ │          < > Sound card support  --->                                                    │ │
      │ │          [ ] HID Devices  --->                                                           │ │
      │ │          [ ] USB support  --->                                                           │ │
      │ │              File systems  --->                                                          │ │
      │ │          <*> The Extended 4 (ext4) filesystem                                            │ │
      │ │          [ ] Network File Systems  --->                                                  │ │
      │ │              Kernel hacking  --->                                                        │ │
      │ │          [*] Compile the kernel with debug info                                          │ │
      │ │              Security options  --->                                                      │ │
      │ │          [ ] NSA SELinux Support                                                         │ │
      │ │          [ ] Virtualization  --->                                                        │ │
    

i386

  • windell57:i386 s0711489$ make menuconfig
      HOSTCC  scripts/kconfig/lxdialog/checklist.o
      HOSTCC  scripts/kconfig/lxdialog/inputbox.o
      HOSTCC  scripts/kconfig/lxdialog/menubox.o
      HOSTCC  scripts/kconfig/lxdialog/textbox.o
      HOSTCC  scripts/kconfig/lxdialog/util.o
      HOSTCC  scripts/kconfig/lxdialog/yesno.o
      HOSTCC  scripts/kconfig/mconf.o
      HOSTLD  scripts/kconfig/mconf
    scripts/kconfig/mconf arch/x86/Kconfig
    
     .config - Linux Kernel v2.6.35.14 Configuration
    
      │ │          [*] Networking support  --->                                                    │ │
      │ │                Networking options  --->                                                  │ │
      │ │          < >   The IPv6 protocol  --->                                                   │ │
      │ │          [ ]   Amateur Radio support  --->                                               │ │
      │ │          -*-   Wireless  --->                                                            │ │
      │ │          < >   cfg80211 - wireless configuration API                                     │ │
      │ │          < >   RF switch subsystem support  --->                                         │ │
      │ │              Device Drivers  --->                                                        │ │
      │ │              Generic Driver Options  --->                                                │ │
      │ │          [*] Maintain a devtmpfs filesystem to mount at /dev                             │ │
      │ │          [*]   Automount devtmpfs at /dev, after the kernel mounted the rootfs           │ │
      │ │              SCSI device support  --->                                                   │ │
      │ │          [*] SCSI low-level drivers  --->                                                │ │
      │ │          <*>   BusLogic SCSI support                                                     │ │
      │ │          [ ] Multiple devices driver support (RAID and LVM)  --->                        │ │
      │ │          [ ] Macintosh device drivers  --->                                              │ │
      │ │          [*] Network device support  --->                                                │ │
      │ │          [*]   Ethernet (10 or 100Mbit)  --->                                            │ │
      │ │          <*>     AMD PCnet32 PCI support                                                 │ │
      │ │          [ ]   Ethernet (1000 Mbit)  --->                                                │ │
      │ │          [ ]   Ethernet (10000 Mbit)  --->                                               │ │
      │ │          < >   Token Ring driver support  --->                                           │ │
      │ │          [ ]   Wireless LAN  --->                                                        │ │
      │ │          [ ]   PCMCIA network device support  --->                                       │ │
      │ │          < >   FDDI driver support                                                       │ │
      │ │          < > Sound card support  --->                                                    │ │
      │ │          [ ] HID Devices  --->                                                           │ │
      │ │          [ ] USB support  --->                                                           │ │
      │ │              File systems  --->                                                          │ │
      │ │          <*> The Extended 4 (ext4) filesystem                                            │ │
      │ │          [ ] Network File Systems  --->                                                  │ │
      │ │              Kernel hacking  --->                                                        │ │
      │ │          [*] Compile the kernel with debug info                                          │ │
      │ │              Security options  --->                                                      │ │
      │ │          [ ] NSA SELinux Support                                                         │ │
      │ │          [ ] Virtualization  --->                                                        │ │
    

make and make install to guest

i386

make

  • windell57:i386 s0711489$ make -j2
  • windell57:i386 s0711489$ make modules

change grub settings to display OS entries

  • s0711489@ubuntu-lucid:~$ sudo vim /etc/default/grub
    • /etc/default/grub

      old new  
      22# /boot/grub/grub.cfg. 
      33 
      44GRUB_DEFAULT=0 
      5 GRUB_HIDDEN_TIMEOUT=0 
      6 GRUB_HIDDEN_TIMEOUT_QUIET=true 
       5#GRUB_HIDDEN_TIMEOUT=0 
       6GRUB_HIDDEN_TIMEOUT_QUIET=false 
      77GRUB_TIMEOUT=10 
      88GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` 
      99GRUB_CMDLINE_LINUX_DEFAULT="splash quiet" 

make install

  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-2.6.35.14$ sudo make install
    sh /mnt/hgfs/linux-2.6.35.14/arch/x86/boot/install.sh 2.6.35.14 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid:/mnt/hgfs/linux-2.6.35.14$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35.14
    
  • s0711489@ubuntu-lucid:~$ sudo mkinitramfs -o /boot/initrd.img-2.6.35.14 2.6.35.14
  • s0711489@ubuntu-lucid:~$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35.14
    Found initrd image: /boot/initrd.img-2.6.35.14
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    

reboot

  • s0711489@ubuntu-lucid:~$ sudo reboot
  • s0711489@ubuntu-lucid:~$ uname -a
    Linux ubuntu-lucid 2.6.35.14 #1 SMP Sun Sep 25 20:00:16 JST 2011 i686 GNU/Linux
    

x86_64

make

  • viola05:x86_64 s0711489$ make -j16
  • viola05:x86_64 s0711489$ make modules

change grub settings to display OS entries

  • s0711489@ubuntu-lucid64:~$ sudo vim /etc/default/grub
    • /etc/default/grub

      old new  
      22# /boot/grub/grub.cfg. 
      33 
      44GRUB_DEFAULT=0 
      5 GRUB_HIDDEN_TIMEOUT=0 
      6 GRUB_HIDDEN_TIMEOUT_QUIET=true 
       5#GRUB_HIDDEN_TIMEOUT=0 
       6GRUB_HIDDEN_TIMEOUT_QUIET=false 
      77GRUB_TIMEOUT=10 
      88GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` 
      99GRUB_CMDLINE_LINUX_DEFAULT="splash quiet" 

make install

  • s0711489@ubuntu-lucid64:/mnt/hgfs/linux-2.6.35.14$ sudo make install
    sh /mnt/hgfs/linux-2.6.35.14/arch/x86/boot/install.sh 2.6.35.14 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid64:/mnt/hgfs/linux-2.6.35.14$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35.14
    
  • s0711489@ubuntu-lucid64:~$ sudo mkinitramfs -o /boot/initrd.img-2.6.35.14 2.6.35.14
  • s0711489@ubuntu-lucid64:~$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35.14
    Found initrd image: /boot/initrd.img-2.6.35.14
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    

reboot

  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • windell57:~ s0711489$ ssh 172.16.237.132
    ssh: connect to host 172.16.237.132 port 22: No route to host
    

add e1000 driver

  • 64bitゲストだとPCnet32の代わりにIntel Pro/1000が用意される
  • s0711489@ubuntu-lucid64:~$ lspci
    02:00.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) (rev 01)
    
  • viola05:x86_64 s0711489$ make menuconfig
     .config - Linux Kernel v2.6.35.14 Configuration
    
      │ │              Device Drivers  --->                                                        │ │
      │ │          [*] Network device support  --->                                                │ │
      │ │          [*]   Ethernet (1000 Mbit)  --->                                                │ │
      │ │          <*>   Intel(R) PRO/1000 Gigabit Ethernet support                                │ │
    
  • viola05:x86_64 s0711489$ make -j16
  • viola05:x86_64 s0711489$ make modules
  • s0711489@ubuntu-lucid64:/mnt/hgfs/linux-2.6.35.14$ sudo make install
    sh /mnt/hgfs/linux-2.6.35.14/arch/x86/boot/install.sh 2.6.35.14 arch/x86/boot/bzImage \
                    System.map "/boot"
    
  • s0711489@ubuntu-lucid64:/mnt/hgfs/linux-2.6.35.14$ sudo make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35.14
    
  • s0711489@ubuntu-lucid64:~$ sudo mkinitramfs -o /boot/initrd.img-2.6.35.14 2.6.35.14
  • s0711489@ubuntu-lucid64:~$ sudo update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35.14
    Found initrd image: /boot/initrd.img-2.6.35.14
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    
  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • s0711489@ubuntu-lucid64:~$ uname -a
    Linux ubuntu-lucid64 2.6.35.14 #2 SMP Sun Sep 25 21:20:21 JST 2011 x86_64 GNU/Linux
    

remove PCnet32 driver

  • viola05:x86_64 s0711489$ make menuconfig
     .config - Linux Kernel v2.6.35.14 Configuration
    
      │ │              Device Drivers  --->                                                        │ │
      │ │          [*] Network device support  --->                                                │ │
      │ │          [*]   Ethernet (10 or 100Mbit)  --->                                            │ │
      │ │          < >     AMD PCnet32 PCI support                                                 │ │
    
  • viola05:x86_64 s0711489$ make -j16
  • viola05:x86_64 s0711489$ make modules
  • (略)
  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • s0711489@ubuntu-lucid64:~$ uname -a
    Linux ubuntu-lucid64 2.6.35.14 #3 SMP Sun Sep 25 21:32:17 JST 2011 x86_64 GNU/Linux
    

set remote debug option to VMware config

i386

  • windell57:~ s0711489$ vim .vmware/ubuntu-lucid/ubuntu-lucid.vmx
    • ubuntu-lucid.vmx

      old new  
      7373sharedFolder0.hostPath = "/home/ugrad/07/s0711489/coursework/KernelHack/linux-2.6.35.14/i386" 
      7474sharedFolder0.guestName = "linux-2.6.35.14" 
      7575sharedFolder0.expiration = "never" 
       76debugStub.listen.guest32 = "TRUE" 
       77debugStub.listen.guest32.remote = "TRUE" 
  • windell57:~ s0711489$ netstat -na | grep 8832
    tcp        0      0 0.0.0.0:8832                0.0.0.0:*                   LISTEN
    
  • debugStub.listen.guest32.remoteが無い場合、localhostにのみbindする
    • windell57:~ s0711489$ netstat -na | grep 8832
      tcp        0      0 127.0.0.1:8832              0.0.0.0:*                   LISTEN
      

x86_64

  • windell57:~ s0711489$ vim .vmware/ubuntu-lucid64/ubuntu-lucid64.vmx
    • ubuntu-lucid64.vmx

      old new  
      7575sharedFolder0.hostPath = "/home/ugrad/07/s0711489/coursework/KernelHack/linux-2.6.35.14/x86_64" 
      7676sharedFolder0.guestName = "linux-2.6.35.14" 
      7777sharedFolder0.expiration = "never" 
       78debugStub.listen.guest64 = "TRUE" 
       79debugStub.listen.guest64.remote = "TRUE" 
  • windell57:~ s0711489$ netstat -na | grep 8864
    tcp        0      0 0.0.0.0:8864                0.0.0.0:*                   LISTEN
    

09/28

  • カーネルのビルドごとにゲスト側でインストールコマンドを叩くのが面倒なのでシェルスクリプトにした
  • install.sh
    #! /bin/sh -ex
    
    VERSION=`ls -d /mnt/hgfs/linux-* | sed s#.*linux-##`
    echo Install Linux Kernel version ${VERSION}
    
    cd /mnt/hgfs/linux-${VERSION}/
    make install
    make modules_install
    
    mkinitramfs -o /boot/initrd.img-${VERSION} ${VERSION}
    update-grub
    
    echo Install Kernel Headers to /lib/modules/${VERSION}/build
    
    mv /lib/modules/${VERSION}/build /lib/modules/${VERSION}/build-`date '+%Y%m%d'`
    
    cd /mnt/hgfs/
    find linux-${VERSION} -type f | egrep -v '.o$' | egrep -v 'vmlinu' | tar c --files-from - | tar x -C /lib/modules/${VERSION}/
    mv /lib/modules/${VERSION}/linux-${VERSION} /lib/modules/${VERSION}/build
    
    uname -a
    
  • s0711489@ubuntu-lucid64:~$ time sudo /mnt/hgfs/tools/install.sh
    + sed s#.*linux-##
    + ls -d /mnt/hgfs/linux-2.6.35.14
    + VERSION=2.6.35.14
    + echo Install Linux Kernel version 2.6.35.14
    Install Linux Kernel version 2.6.35.14
    + cd /mnt/hgfs/linux-2.6.35.14/
    + make install
    sh /mnt/hgfs/linux-2.6.35.14/arch/x86/boot/install.sh 2.6.35.14 arch/x86/boot/bzImage \
                    System.map "/boot"
    + make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35.14
    + mkinitramfs -o /boot/initrd.img-2.6.35.14 2.6.35.14
    + update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35.14
    Found initrd image: /boot/initrd.img-2.6.35.14
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    + echo Install Kernel Headers to /lib/modules/2.6.35.14/build
    Install Kernel Headers to /lib/modules/2.6.35.14/build
    + date +%Y%m%d
    + mv /lib/modules/2.6.35.14/build /lib/modules/2.6.35.14/build-20110928
    + cd /mnt/hgfs/
    + tar c --files-from -
    + tar x -C /lib/modules/2.6.35.14/
    + egrep -v vmlinu
    + egrep -v .o$
    + find linux-2.6.35.14 -type f
    + mv /lib/modules/2.6.35.14/linux-2.6.35.14 /lib/modules/2.6.35.14/build
    + uname -a
    Linux ubuntu-lucid64 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:07:13 UTC 2011 x86_64 GNU/Linux
    
    real    1m32.138s
    user    0m13.790s
    sys     1m26.160s
    

09/30

install VMware tools to custom kernel

  • install.sh
    #! /bin/sh -ex
    
    VERSION=`cat /mnt/hgfs/linux-*/include/config/kernel.release`
    echo Install Linux Kernel version ${VERSION}
    
    cd /mnt/hgfs/linux-*/
    make install
    make modules_install
    
    mkinitramfs -o /boot/initrd.img-${VERSION} ${VERSION}
    update-grub
    
    echo Install Kernel Headers to /lib/modules/${VERSION}/build
    
    mv /lib/modules/${VERSION}/build /lib/modules/${VERSION}/build-`date '+%Y%m%d'`
    
    cd /mnt/hgfs/
    find linux-* -type f | egrep -v '.o$' | egrep -v 'vmlinu' | tar c --files-from - | tar x -C /lib/modules/${VERSION}/
    mv /lib/modules/${VERSION}/linux-* /lib/modules/${VERSION}/build
    
    uname -a
    
  • s0711489@ubuntu-lucid64:~$ sudo /mnt/hgfs/tools/install.sh
    + cat /mnt/hgfs/linux-2.6.35.14/include/config/kernel.release
    + VERSION=2.6.35.14
    + echo Install Linux Kernel version 2.6.35.14
    Install Linux Kernel version 2.6.35.14
    + cd /mnt/hgfs/linux-2.6.35.14/
    + make install
    sh /mnt/hgfs/linux-2.6.35.14/arch/x86/boot/install.sh 2.6.35.14 arch/x86/boot/bzImage \
                    System.map "/boot"
    + make modules_install
      INSTALL arch/x86/kernel/test_nx.ko
      INSTALL drivers/scsi/scsi_wait_scan.ko
      INSTALL net/netfilter/xt_mark.ko
      DEPMOD  2.6.35.14
    + mkinitramfs -o /boot/initrd.img-2.6.35.14 2.6.35.14
    + update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-2.6.35.14
    Found initrd image: /boot/initrd.img-2.6.35.14
    Found linux image: /boot/vmlinuz-2.6.32-33-generic
    Found initrd image: /boot/initrd.img-2.6.32-33-generic
    Found memtest86+ image: /boot/memtest86+.bin
    done
    + echo Install Kernel Headers to /lib/modules/2.6.35.14/build
    Install Kernel Headers to /lib/modules/2.6.35.14/build
    + date +%Y%m%d
    + mv /lib/modules/2.6.35.14/build /lib/modules/2.6.35.14/build-20110930
    + cd /mnt/hgfs/
    + egrep -v .o$
    + egrep -v vmlinu
    + tar c --files-from -
    + tar x -C /lib/modules/2.6.35.14/
    + find linux-2.6.35.14 -type f
    + mv /lib/modules/2.6.35.14/linux-2.6.35.14 /lib/modules/2.6.35.14/build
    + uname -a
    Linux ubuntu-lucid64 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29 21:07:13 UTC 2011 x86_64 GNU/Linux
    
  • s0711489@ubuntu-lucid64:~$ sudo reboot
  • s0711489@ubuntu-lucid64:~$ uname -a
  • s0711489@ubuntu-lucid64:~$ sudo vmware-config-tools.pl --default

step execution with GDB

  • s0711489@ubuntu-lucid64:~/coursework/KernelHack/02$ cat > getpid.c
    #include <sys/types.h>
    #include <syscall.h>
    #include <stdio.h>
    
    int main (void) {
            printf ("getpid() -> %d\n", getpid());
    }
    
  • s0711489@ubuntu-lucid64:~/coursework/KernelHack/02$ cc getpid.c -o getpid
  • s0711489@ubuntu-lucid64:~/coursework/KernelHack/02$ strace -f -o getpid.log ./getpid
    getpid() -> 2007
    
  • windell57:x86_64 s0711489$ gdb
    (gdb) file vmlinux
    Reading symbols from /home/ugrad/07/s0711489/coursework/KernelHack/linux-2.6.35.14/x86_64/vmlinux...(no debugging symbols found)...done.
    (gdb) target remote localhost:8864
    
    (gdb) help step
    Step program until it reaches a different source line.
    Argument N means do this N times (or till program stops for another reason).
    (gdb) help next
    Step program, proceeding through subroutine calls.
    Like the "step" command as long as subroutine calls do not happen;
    when they do, the call is treated as one instruction.
    Argument N means do this N times (or till program stops for another reason).
    
    • 初めのうちはnextを使っていたため、サブルーチンコールがスキップされてしまい、うまく実行コードを見ることが出来なかった。
  • windell57:02 s0711489$ cat > gdb.step.sh
    echo 'file vmlinux
    target remote localhost:8864'
    yes s
    
  • s0711489@ubuntu-lucid64:~/coursework/KernelHack/02$ while true; do ./getpid ;done
    getpid() -> 1816
    getpid() -> 1817
    
    (snip)
    
    getpid() -> 2846
    getpid() -> 2847
    getpid() -> 2848
    Killed by signal 15.
    
  • windell57:x86_64 s0711489$ sh ../../02/gdb.step.sh | gdb > gdb.txt
  • stepコマンドだけでは、実行されるコードが膨大すぎて、目当てのgetpidシステムコールまで到達出来なかった
Last modified 6 years ago Last modified on Oct 4, 2011 10:34:51 PM

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