RE: Write System Pointer to User Space

-----Original Message-----
From: mi400-bounces@xxxxxxxxxxxx [mailto:mi400-bounces@xxxxxxxxxxxx]On
Behalf Of Peter Daransky
Sent: Friday, June 17, 2005 9:59 PM
To: c400@xxxxxxxxxxxx
Cc: mi400@xxxxxxxxxxxx
Subject: [MI400] Write System Pointer to User Space


>I try to write resolved system pointer of one object to user space ... 
>But it doesn't work for me!? Better sayed i've a C structure with many 
>variables and my wish is >write it complet as a block of data to user space, 
>so that i can later read it with the resolved >pointer ... 
>Do i need perform something special (API or MI instruction ...) ? 

Hi Peter,

This should work. Make sure you are not doing a memcpy copy of the struct to 
the user space. That would invalidate the system pointer contained in the 
struct.  Also, make sure of the alignment of the data members of the struct.  
Pointers need to be on a 16 byte boundary and it is possible in C to pack the 
struct, which might throw off the alignment of the pointers.

-Steve