Re: [Qemu-devel] [PATCH] use an unsigned long for the max_sz parameter in load_image_targphys

[Markus Armbruster]

Alexander Graf <address@hidden> writes:

[...]
> Imagine, your host can only do 32 bit file offsets. You want to
> emulate a 64bit guest though. To load an image, you say "load the
> image at offset x, max size <guest ram size - x>". If you use size_t,
> it would break for large ram guests, because the size really means
> semantically that you want to be able to load into address
> [x...ram_size] of the guest's physical memory range. If the host can
> actually load images that big is an orthogonal question.

A host with 64 bit virtual address space, yet file offsets (and thus
file sizes) limited to 32 bits?  That's a contrived example if I ever
saw one.  You need to come up with a remotely practical one to convince
me :)