Re: absolute firmware path made relocatable in qemu 5.2.0

[Paolo Bonzini]

On 12/01/21 15:05, Dave wrote:
> Is seem that absolute firmwarepath compilation option is converted  to 
> relocatable in 5.2.0 qemu.
>
> # QEMU configure log Tue 12 Jan 14:46:41 GST 2021
> # Configured with: '../configure' '--prefix=/usr' 
> '--sysconfdir=/etc/qemu' '--disable-bochs'  
> '*--firmwarepath=/usr/share/qemu:/usr/share/qemu-firmware*'
> #

Yes, all paths within the prefix are relocated.  The workaround is 
simply to configure the intended prefix with configure:

./configure --prefix=/root/qemu ...

or if you don't know the prefix:

./configure --prefix=/nonexistent ...

Because /usr/share/qemu and /usr/share/qemu-firmware are outside /usr, 
they will be treated as absolute just like /etc/qemu.

Thanks,

Paolo

> And trying to run the executable
>
>     bash-5.1# ./qemu-system-x86_64
>     qemu: could not load PC BIOS 'bios-256k.bin'
>
> If i print out the resultant binary paths
>
>     bash-5.1# ./qemu-system-x86_64 -L help
>     /root/qemu/../share/qemu
>     /root/qemu/../share/qemu-firmware
>
> So there is no way to have a absolute path for firmware /bios and all 
> qemu's that we test need to be at the right directory nesting to find 
> firmware, bios etc or else they all need their own duplicate firmware 
> files. Firmware path needs to honor the absolute paths i believe.