RE: 64-bit bootloaders

[Dave Scott <Dave.Scott@xxxxxxxxxxxxx>]

Ah yeah that worked for me once I upgraded my nasm :)

I made a 128MiB disk with a single partition and tried to format it with mtools 
using

$ mformat -B boot16.bin -f 1440 a:
(after editing my /etc/mtools.conf)

And then

$ mcopy kernel64.sys a:

...

And then the boot hangs under xen -- do you have something like virtualbox 
handy?


Cheers,
Dave
> -----Original Message-----
> From: Anil Madhavapeddy [mailto:anil@xxxxxxxxxx]
> Sent: 04 July 2012 20:47
> To: Dave Scott
> Cc: cl-mirage@xxxxxxxxxxxxxxx
> Subject: Re: 64-bit bootloaders
> 
> It works fine if you do:
> 
> $ cd BareMetal-OS/os
> $ nasm kernel64.asm -o kernel64.sys
> 
> The files are all included and not intended to be separately compiled.
> 
> -anil
> 
> On 4 Jul 2012, at 20:05, Dave Scott wrote:
> 
> > Not yet-- you're already ahead of me! I'll maybe try an older
> environment since you're trying wheezy.
> >
> > --
> > Dave Scottt
> >
> > On Jul 4, 2012, at 7:03 PM, "Anil Madhavapeddy" <anil@xxxxxxxxxx>
> wrote:
> >
> >> Have you tried it?  I just downloaded it via the Github repo at
> https://github.com/ReturnInfinity/BareMetal-OS
> >>
> >> It appears to use NASM instead of GAS, but I'm not sure which
> version to try.  Compiling under Debian/wheezy/amd64 gives all sorts of
> interesting compilation errors:
> >>
> >> $ nasm fat16.asm -o fat16.sys
> >> fat16.asm:170: error: impossible combination of address sizes
> >> fat16.asm:170: error: invalid effective address
> >> fat16.asm:177: error: impossible combination of address sizes
> >> fat16.asm:177: error: invalid effective address
> >>
> >> I'll take a look later, but wondering if you have a working build
> environment before I dig deeper.  It looks like its intended to be
> built on Windows, judging from the lack of Makefiles.
> >>
> >> -anil
> >>
> >> On 4 Jul 2012, at 08:19, Dave Scott wrote:
> >>
> >>> Hi,
> >>>
> >>> I came across this project:
> >>>
> >>> http://www.returninfinity.com/pure64.html
> >>>
> >>> It's a 64-bit OS bootloader with minimal backwards compat stuff
> under a BSD license. Perhaps we could glue it onto mirage to complement
> the xen PV support. It would be fun to write an IDE driver in ocaml :-)
> >>>
> >>> Cheers,
> >>> Dave
> >>>
> >>
> >