Re: [Gems-users] ruby_operate

[Mike Marty <mikem@xxxxxxxxxxx>]

He is better off using the virtual address available in mem_op (I think)

--Mike


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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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