On 09/06/2016 02:08 PM, Mahmoud Hanafi wrote:
On 09/06/2016 11:55 AM, David Smith wrote:
On 09/06/2016 01:37 PM, Mahmoud Hanafi wrote:
In my stap script I have some embedded C function that needs to make
some calls to external libraries. Is there I can link my script with the
external libs? Or do i need to add all the code I need into my script.
Basically you can't. A systemtap script gets compiled into a kernel
module (assuming you are using the default 'linux' runtime). A kernel
module can't access *any* user library.
Perhaps you should back up a bit and let us know what your external
library is trying to do.
The library is part of lustre. I need the functions that does address
translation to string values.
Can you point me to the library/function on lustre.org that you are
interested in?
You can't really copy userspace C code into systemtap. Systemtap tries
very hard to handle memory accesses safely (since otherwise you can
crash the kernel). We might be able to "translate" the userspace C code
into embedded C.