Re: [Minios-devel] [UNIKRAFT PATCH v3 4/8] plat/linuxu: Add linuxu (ARM) interrupts support

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Hey Julien,

thanks for your comment. We are welcoming that you guys are also having 
a look to our patches. This helps us a lot. We are going to change the 
instruction as you suggested. ;-)
Thanks,

Simon

On 14.06.2018 18:33, Julien Grall wrote:
> Hi Simon,
>
> On 14/06/18 15:12, Simon Kuenzer wrote:
> > From: Costin Lupu <costin.lupu@xxxxxxxxx>
> >
> > Changes:
> > - ARM syscall numbers for SIGACTION and SIGPROCMASK
> > - ARM asm restorer
> >
> > Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
> > ---
> >   plat/linuxu/include/linuxu/syscall-arm_32.h | 4 ++++
> >   plat/linuxu/irq.c                           | 7 +++++++
> >   2 files changed, 11 insertions(+)
> >
> > diff --git a/plat/linuxu/include/linuxu/syscall-arm_32.h 
> > b/plat/linuxu/include/linuxu/syscall-arm_32.h
> > index e28224d..5c1a919 100644
> > --- a/plat/linuxu/include/linuxu/syscall-arm_32.h
> > +++ b/plat/linuxu/include/linuxu/syscall-arm_32.h
> > @@ -46,6 +46,10 @@
> >   #define __SC_MUNMAP    91
> >   #define __SC_EXIT       1
> >   #define __SC_IOCTL     54
> > +
> > +#define __SC_RT_SIGACTION 43
> > +#define __SC_RT_SIGPROCMASK 126
> > +
> >   #define __SC_PSELECT6 335
> >   /* NOTE: from `man syscall`:
> > diff --git a/plat/linuxu/irq.c b/plat/linuxu/irq.c
> > index 57e23d3..18fd266 100644
> > --- a/plat/linuxu/irq.c
> > +++ b/plat/linuxu/irq.c
> > @@ -112,7 +112,14 @@ void ukplat_lcpu_irqs_handle_pending(void)
> >   }
> >   void __restorer();
> > +
> > +#if defined __X86_64__
> >   asm("__restorer:mov $15,%rax\nsyscall");
> > +#elif defined __ARM_32__
> > +asm("__restorer:mov r7, #0x77\nswi 0x0");
> "swi" is the pre-UAL name for "svc". The latter is better to use as most 
> likely you are only targeting ARMv7 and onwards platform.
> Cheers,
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