probes that access userspace

[Kevin Stafford]

Frank Ch. Eigler wrote:

>>[...]  If this is not possible, I think it would be useful to
>>enhance the language such that a probe script could explicitly
>>notify the translator of a user space pointer access [...]
>>    
>>
>Perhaps.  Other than the system call interfaces, is this difficulty
>likely to arise often elsewhere?
>
>[...] For user-level probes, there is no ambiguity: every
>pointer dereference is in user space.
>  
>
Being that for user-level probes, every pointer dereference is in user 
space, I believe
it is certain that this difficulty will arise elsewhere.

-- 
Kevin Stafford
DES 2 | MS 2M3
Beaverton - OR
Linux Technology Center
IBM Systems & Technology
Phone: 1-503-578-3039
Email: kevinrs@us.ibm.com