Re: [Qemu-devel] osx bootloader

[Alexander Graf <agraf@suse.de>]

On 01/29/2014 03:53 PM, Gabriel L. Somlo wrote:
> On Wed, Jan 29, 2014 at 12:29:17PM +0100, BALATON Zoltan wrote:
>> I've also found this:
>> http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=OvmfPkg
>> which might be what we need for using Apple's boot.efi but I don't
>> know how ready is it and if it works with OS X.
> I managed to boot OVMF following their wiki; It seems to work with kvm
> enabled, but not with -M q35. My current command line is:
>
> bin/qemu-system-x86_64 -enable-kvm -m 2048 -cpu core2duo \
>                         -usb -device usb-kbd -device usb-mouse \
>                         -device isa-applesmc,osk="..." \
>                         -hda mlion_hdd.img
>
> after having replaced bios.bin and vgabios-cirrus.bin with the OVMF
> files.
>
> It obviously fails to boot OS X (now THAT would have been a surprise!)
> but at least it detects the hard disk:
>
> fs0   :HardDisk - Alias hd12a1 blk0
>        PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(1,GPT,BA0DB2B5-2270-4749-B794-BC005BEC1863,0x28,0x64000)
>
> I poked around the "boot maintenance manager" a bit, and "boot from
> file" looked promising -- I was hoping to navigate straight to
> /System/Library/CoreServices/boot.efi and just hit "Enter", but was
> only able to see an empty folder hierarchy:
>
> EFI/
>    APPLE/
>      EXTENSIONS/
> .Trashes/
>    501/
>
> So I guess I have a bit more RTFM ahead of me. Maybe I can find a way
> to copy boot.efi over to the actual EFI partition, which I assume is
> the only one I can explore with OVMF from the entire disk image...

You will need an EFI HFS+ driver (look at the refind pointer) because 
boot.efi will use EFI callbacks to read the kernel and kext cache.


Alex