Re: [Minios-devel] [UNIKRAFT PATCH v4 6/9] plat/linuxu: Add linuxu (ARM) interrupts support

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 30/08/18 14:52, Florian Schmidt wrote:
> On 08/30/2018 03:10 PM, Sharan Santhanam wrote:
> > On 08/20/2018 01:21 PM, Florian Schmidt wrote:
> > In the sigrestorer.S[1] in glibc implmentation sets up Call frame 
> > information in front of the restorer function. Should we also not do 
> > this?
> > > +asm("__restorer:mov r7, #0x77\nsvc 0x0");
> > > +#else
> > > +#error "Unsupported architecture"
> > > +#endif
> > >   static void _irq_handle(int irq)
> > >   {
> > [1] 
> > https://code.woboq.org/userspace/glibc/sysdeps/unix/sysv/linux/arm/sigrestorer.S.html 
> I honestly don't know. Maybe one of our ARM experts can shed some light 
> on this? Why would it expect all registers to be on the stack?
I don't know the reasoning behind the CFI for this function. However, I 
don't think it is necessary to provide one for arm as you don't provide 
any for x86.
Cheers,

--
Julien Grall

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