sparc assembly mnemonic

sparc assembly mnemonic

[Fabio Miranda Hamburger]

what are the sparc assembly  equivalent of the following instructions:

    __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf));
    __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf));


thanks,

---
Fabio Andres Miranda
Ingenieria de sistemas informaticos
Universidad Latina - Costa Rica

Re: sparc assembly mnemonic

[David S. Miller]

On Mon, 21 Jun 2004 12:34:25 -0600 (CST)
Fabio Miranda Hamburger <fabmirha@ns.isi.ulatina.ac.cr> wrote:

> what are the sparc assembly  equivalent of the following instructions:
> 
>     __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf));
>     __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf));

You have to save each and every register by hand, unlike x86 there
isn't a specific instruction which saves everything for you.

Re: sparc assembly mnemonic

[Maciej Hrebien]

"David S. Miller" wrote:
> 
> On Mon, 21 Jun 2004 12:34:25 -0600 (CST)
> Fabio Miranda Hamburger <fabmirha@ns.isi.ulatina.ac.cr> wrote:
> 
> > what are the sparc assembly  equivalent of the following instructions:
> >
> >     __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf));
> >     __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf));
> 
> You have to save each and every register by hand, unlike x86 there
> isn't a specific instruction which saves everything for you.

What about save/restore mechanism (tmp purposes)? Does it work only for
alu registers (not fpu)? I'm just curious - never played with sparc :(

-- 
Maciej Hrebien

Re: sparc assembly mnemonic

[David S. Miller]

On Mon, 21 Jun 2004 23:16:52 +0200
Maciej Hrebien <m_hrebien@wp.pl> wrote:

> "David S. Miller" wrote:
> > 
> > On Mon, 21 Jun 2004 12:34:25 -0600 (CST)
> > Fabio Miranda Hamburger <fabmirha@ns.isi.ulatina.ac.cr> wrote:
> > 
> > > what are the sparc assembly  equivalent of the following instructions:
> > >
> > >     __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf));
> > >     __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf));
> > 
> > You have to save each and every register by hand, unlike x86 there
> > isn't a specific instruction which saves everything for you.
> 
> What about save/restore mechanism (tmp purposes)? Does it work only for
> alu registers (not fpu)? I'm just curious - never played with sparc :(

That's correct, the 'save' and 'restore' instructions only store ALU register,
and not even all of them, just the current window (this leaves out other windows
and the global registers).

RE: sparc assembly mnemonic

[John Rodriguez]

Funny, this looks like the same code used to exploit a linux kernel bug.
See http://linuxreviews.org/news/2004-06-11_kernel_crash/index.html for
details.  Hopefully, no malice is intended by this posting.

-----Original Message-----
From: linux-assembly-owner@vger.kernel.org
[mailto:linux-assembly-owner@vger.kernel.org] On Behalf Of Fabio Miranda
Hamburger
Sent: Monday, June 21, 2004 2:34 PM
To: linux-assembly@vger.kernel.org
Subject: sparc assembly mnemonic

what are the sparc assembly  equivalent of the following instructions:

    __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf));
    __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf));


thanks,

---
Fabio Andres Miranda
Ingenieria de sistemas informaticos
Universidad Latina - Costa Rica

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