RE: Met Problem on Enable SystemTap on Android

["Turgis, Frederic" <f-turgis at ti dot com>]

Unfortunately this looks Nexus S specific. We have less restriction on our dev platforms so I can't really elaborate much as I have no specific need to root phone.

At least you have remounted partitions rw, which shall have been sufficient to push, as this is the only thing I may need to do. You shall try:
- push a simple file from your home directory (no directory, nothing that can be under root ownership, just simple file)
- try to push to different locations: /, /system, /data... All directories may not be persistent but that is a start
- try to put systemtap on Sdcard and remount it rw. Systemtap shall also work from there.

Then I fear only google/forums can be your friend as this is not a systemtap issue :-(

Regards
Fred

Frederic Turgis
OMAP Platform Business Unit - OMAP System Engineering - Platform Enablement



>
Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 753.920

-----Original Message-----

>From: Yao,Yanjun [mailto:jiaoyang28@gmail.com]
>Sent: Tuesday, September 20, 2011 9:50 PM
>To: Turgis, Frederic
>Cc: systemtap@sourceware.org
>Subject: Re: Met Problem on Enable SystemTap on Android
>
>I got the SystemTap runs perfectly on the Android Emulator.
>Thanks all person that helped.
>
>However, when I try to make this happen on the Nexus S phone,
>I just can not upload the files into the "/data" folder.
>
>The following are what I did:
>1. Root the phone by following video on link:
>
>http://theunlockr.com/2010/12/17/how-to-root-the-samsung-nexus-s/
>2. Download the Nexus S kernel code by:
>        git clone
>http://github.com/CyanogenMod/android_kernel_samsung_c1.git
>kernel 3. Add debug flags and modify ptrace.h as mentioned in:
>        http://omappedia.org/wiki/Systemtap#Kernel%20Code
>4. Reboot the phone with new kernel:
>        fastboot boot zImage
>
>The following are the problems I met:
>1. I can not get the Root right of the phone by just using
>"./adb shell". Instead, I need to run "su" inside the shell.
>2. The "fastboot boot zImage" does not work out, it makes my
>phone stays on the screen with big "Google" for ever. So I
>guess the customer kernel is not flashed on the phone.
>3. When I try to push any file, it either tells me the file
>does not exit, or permission denied. For example:
>        sudo ./adb push
>/data/systemtap-1.5-macharm/bin/staprun /data/staprun
>        failed to copy '/data/systemtap-1.5-macharm/bin/staprun' to
>'/data/staprun': Permission denied
>or
>        ./adb push /data/systemtap-1.5-macharm/
>/data/systemtap-1.5-macharm/
>        push: /data/systemtap-1.5-macharm/libexec/systemtap/stap-env
>-> /data/systemtap-1.5-macharm/libexec/systemtap/stap-env
>        failed to copy
>'/data/systemtap-1.5-macharm/libexec/systemtap/stap-env' to
>'/data/systemtap-1.5-macharm/libexec/systemtap/stap-env': No
>such file or directory
>
>I first guess that is the problem of the "ro" of file systems,
>so I remount them to be:
>        rootfs / rootfs rw,relatime 0 0
>       tmpfs /dev tmpfs rw,relatime,mode=755 0 0
>       devpts /dev/pts devpts rw,relatime,mode=600 0 0
>       proc /proc proc rw,relatime 0 0
>       sysfs /sys sysfs rw,relatime 0 0
>       none /acct cgroup rw,relatime,cpuacct 0 0
>       tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
>       tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
>       none /dev/cpuctl cgroup rw,relatime,cpu 0 0
>       /dev/block/mtdblock4 /cache yaffs2 rw,nosuid,nodev,relatime 0 0
>       /dev/block/mtdblock6 /efs yaffs2 rw,nosuid,nodev,relatime 0 0
>       /dev/block/platform/s3c-sdhci.0/by-name/system /system
>ext4 rw,relatime,barrier=1,data=ordered 0 0
>       /dev/block/platform/s3c-sdhci.0/by-name/userdata /data
>ext4 rw,nosuid,nodev,noatime,barrier=1,data=ordered 0 0
>       /sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
>       /dev/block/vold/179:3 /mnt/sdcard vfat
>rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask
=0702,dmask=0702,allow_utime=>0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,er
>rors=remount-ro
>0 0
>       /dev/block/vold/179:3 /mnt/secure/asec vfat
>rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask
=0702,dmask=0702,allow_utime=>0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,er
>rors=remount-ro
>0 0
>       tmpfs /mnt/sdcard/.android_secure tmpfs
>ro,relatime,size=0k,mode=000 0 0
>
>However, the problem is still there.
>
>Is this the problem of my method of Root the phone? Why I just
>can not push the SystemTap tools into the "/data" folder?
>
>Any hint would be warmly welcomed.
>
>Thank you very much.
>
>Yours
>Sincerely
>