Re: [Qemu-devel] (no subject)

[Fam Zheng]

On Mon, 09/12 16:23, Stephen Bates wrote:
> Hi

Hi Stephen,

> 
> I sent this to qemu-discuss with no success so resending to qemu-devel.
> 
> I am doing some very low level OS design work and wanted to be able to
> alter some values in the physical memory of my QEMU guest. I can see quite
> a few ways to print/dump both physical and virtual addresses but nothing
> that can alter arbitrary physical/virtual addresses?
> 
> Does such a feature exist in Qemu and if it does are there pointers to
> documentation for it?

Have you tried the builtin gdbstub in QEMU? You can add "-s" to the QEMU
command line and then connect to it from gdb with "target remote :1234". There
you can inspect or change memory more easily.

Fam

> 
> I do see that we can use file backing for very large memory regions via
> the memory-backing-file option but I am not really trying to alter massive
> regions of memory in this case.
> 
> Cheers
> 
> Stephen Bates
>