Re: [Qemu-devel] Monitor Memory Accesses

[Andrea Pellegrini]

Thanks for the quick reply!

I obtain the instruction addresses through the function
static TranslationBlock *tb_find_slow(target_ulong pc,
                                     target_ulong cs_base,
                                     uint64_t flags)

......
// Andrea, let's check the pc
   printf("PC: 0x%x\n", pc);
....

in cpu_exec.c. So far it worked but maybe there is a better way to do 
it. Where can I find more informations about the "helper"?
I'm just starting working with Qemu so I'm still not 100% sure about 
what is going on.  :-P

I searched in target-i386/translate.c for
tcg_gen_qemu_ld
or
tcg_gen_qemu_lst
and nothing pops up. Am I looking at the right thing?
Thanks
~Andrea


Laurent Desnogues wrote:
> On Wed, Feb 18, 2009 at 1:48 PM, Andrea Pellegrini
> <address@hidden> wrote:
>   
> > I want to track all the memory accesses performed in a program execution.
> > Right now I'm working on an amd64 machine with target x86_64 but eventually
> > I would like to do the same for other architectures (at least ARM and PPC).
> > With few changes I was able to print out the address of the instructions
> > that the processor executes (well at least the first address of the basic
> > block)
> >     
>
> I guess you're doing that by calling a helper.  If you don't, that
> won't work :-)
>
>   
> > and now I was looking for a way to record all memory loads and
> > stores. I believe I have to change some code in the file translate.c and I
> > was wondering if anybody can give me a quick help about which part of code I
> > should change. It would be great if I could call a function right before
> > every time a load or store is executed.
> >     
>
> You should look for parts of translate.c that generate target loads
> and stores;  basically look for calls to tcg_gen_qemu_ld* and
> tcg_gen_qemu_st*.
>
>
> Laurent
>
>
>
>