Re: Write System Pointer to User Space

Peter you have to use the CPYBWP (copy bytes with
pointers MI-instruction). That is the only thing that will
work.

Leif

On 6/19/05, Steve Richter <srichter@xxxxxxxxxxxxx> wrote:
> 
> -----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
> 
> 
> 
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