Re: [Gems-users] ruby_operate

[Philip Garcia <pcgarcia@xxxxxxxx>]

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Is  the address 0xff26e00 a physical or logical address?  If you just  
obtained the address from the program you need to first get the  
physical address translation of it.   The easiest way (that I can  
think of) would be to issue a magic break point after you printed the  
instruction, and ask simics for the translation (check the simics  
reference manual on how to do this).   Then you'd need to change the  
physical address to the translated value.  You might also want to  
consider creating a new magic instruction that first puts the  
physical address in a known register and then translates that address  
on a magic reference (you'd also have to make sure you read/wrote a  
value to that address beforehand so that simics can actually perform  
the translation and find it in the processors TLB).    Check out the  
simics.net for more information.
phil
On Jan 17, 2007, at 1:15 PM, Dave Z. wrote:

> Hi,
>
> I'm trying to catch some accesses in ruby_operate (ruby.c) using  
> the following:
>  if ((mem_op->s.physical_address >= 0xff26e000) && (mem_op- 
> >s.physical_address < 0xff26e00f))
>     printf("Accessing physical address %x\n", mem_op- 
> >s.physical_address);
> In my benchmarks, I have int* ptr (where ptr = ff26e000). But the  
> following accesses are not caught in ruby_operate:
> ptr[0] = value;
> x = ptr[1];
> ...
>
> Is there something wrong with what I'm doing?
>
> Thanks
>
>
>
>
>
>
>
>
>
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