Re: [Qemu-devel] qemu-user: relocating target code weakness

[Stefano Bonifazi]

On 01/25/2011 05:26 PM, Richard Henderson wrote:
> On 01/25/2011 03:06 AM, Stefano Bonifazi wrote:
> > > start_brk   0x00000000
> > > end_code    0x400102e0
> > > start_code  0x40000000
> > > start_data  0x4001024c
> > > end_data    0x400102e0
> > > start_stack 0x40811438
> > > brk         0x400102e4
> > > entry       0x40828c24
> > that is start_brk is 0
> > As far as I understood brk is the .bss section, that is unitialized data area, 
> > am I right?
> Not quite.  It's normally the beginning of the heap, after the bss section.
>
> That said, it looks like start_brk is a dead variable.  It's written only by the
> FLAT loader, and nothing at all reads it, except for this debugging dump.
>
> The "real" value is the "brk" variable, which is indeed set to a plausible 
> looking value.
>
>
> r~
Thank you!! I really missed that.. I've always wondered where the heap was!
So brk and start_brk are the same .. the latter just being used 
previously and now forgotten there?
Is there a heap end address? Is it possible to set it someway? It would 
be really very helpful for me!!
Thank you again!
Best regards!
Stefano B.