Re: ppc asm

[KF <dotslash () snosoft com>]

I have heard the the use of fork() can also help with a dirty
instruction cache... does anyone 
else have any insight on this?
-KF 

> One thing I've noticed on ppc is that when you write to the stack,
> you're really writing to the data cache.  Then when execution begins,
> the instructions are fetched from the instruction cache -- which isn't
> always the same as what you put into the data cache.  I'm not saying
> that a xor decoder won't work, but you'll probably need to include a
> series of cache sync instructions (dcbst,sync,icbi,isync?).  There may
> also be issues when using a multiprocessor box or a 64bit box.  More
> information on this can be found in the "PowerPC Microprocessor Family:
> The Programming Environment" chapter 5.  This book is available in pdf
> form at:
>
>   http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/852569B20050FF778525699600719DF2/$file/6xx_pem.pdf
>
> --
> Troy Bollinger <troy () austin ibm com>
> Network Security Analyst
> PGP keyid: 1024/0xB7783129
> Troy's opinions are not IBM policy