Changes between Version 6 and Version 7 of Dev/KernelHack/COINS/worklog/201109

Timestamp:

Oct 4, 2011 10:34:51 PM (14 years ago)

Author:

mitty

Comment:

--

Dev/KernelHack/COINS/worklog/201109

@@ -938 +938 @@
 sys     1m26.160s
 }}}
+
+ = 09/30 =
+ == install VMware tools to custom kernel ==
+ * install.sh
+{{{#!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
+{{{#!cc
+#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
+{{{#!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