[Qemu-devel] Writing into guest memory from qemu

[Qemu-devel] Writing into guest memory from qemu

[Shubham Gupta]

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Hello

I am attempting to write into the guest memory state (before the guest is
launched) using the cpu_physical_memory_write function. While some values
are being correctly written into the guest memory (confirmed by a
cpu_physical_memory_read just after the write), some are not. Is there an
explanation for this behavior? Or am I using the wrong function to
accomplish what I want? Thanks in advance.

Shubham Gupta

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Re: [Qemu-devel] Writing into guest memory from qemu

[Sergey Fedorov]

Hi,

Maybe you are trying to write into read-only, device MMIO or unassigned
address? You can launch qemu with '-S' and then try 'info mtree' qemu
monitor command to see the memory mapping.

// Sergey

On 24.06.2014 11:20, Shubham Gupta wrote:
> Hello
>
> I am attempting to write into the guest memory state (before the guest
> is launched) using the cpu_physical_memory_write function. While some
> values are being correctly written into the guest memory (confirmed by
> a cpu_physical_memory_read just after the write), some are not. Is
> there an explanation for this behavior? Or am I using the wrong
> function to accomplish what I want? Thanks in advance. 
>
> Shubham Gupta