Re: [9fans] Parallels Vesa driver question

[Bakul Shah <bakul+plan9@bitblocks.com>]

On Tue, 04 Aug 2009 13:46:31 EDT erik quanstrom <quanstro@quanstro.net>  wrote:
> > Anyway, a couple of areas to look into, if you want plan9 on
> > vbox: try changing the memory layout of plan9 or figure out
> > what qemu did to make plan9 run well and apply that change to
> > vbox.
>
> what makes you think its a memory layout issue?

I can no longer remember but I think the following played some
part in thinking that.  Qemu internals document (on qemu.org):
    For system emulation, QEMU uses the mmap() system call to
    emulate the target CPU MMU. It works as long the emulated
    OS does not use an area reserved by the host OS (such as
    the area above 0xc0000000 on x86 Linux).
Elsewhere it says
    Achieving self-virtualization is not easy because there
    may be address space conflicts. QEMU solves this problem
    by being an executable ELF shared object as the
    ld-linux.so ELF interpreter. That way, it can be
    relocated at load time.
It was a hypothesis and it could be all wet.