Problem reading sys_write arguments

[Mike Mason]

I don't see this problem when I run a script that probes sys_write and vfs_write.  What systemtap version, kernel version and architecture are you using?  Also, please post your script.

Thanks,
Mike

Akshay Shah wrote:
> I could not read the correct value for certain syscall arguments.
> 
> When I tried to print the count field for a "sys_write" call, the
> value returned is always 4. However, it prints the correct value of
> count for a probe on "vfs_write".
> 
> I am not sure whether I am doing something wrong in the script. It
> just probes both functions and prints the $count value to stdout.
> 
> Am I missing something which could result in the incorrect value? Has
> someone seen something similar?
> 
> Thanks,
> Akshay