[pso] Tema 1 Linux - Invocare de mana system call

[Luis Cazacu]

Poti folosi si functia "syscall" pt a invoca un anumit apel de sistem.

syscall(nr_apel,....+lista param.......)


On 3/16/07, Andrei Popa <ca at i-neo.ro> wrote:
>
> On Fri, 2007-03-16 at 00:11 +0200, Alexandru Tudose wrote:
> > Am incercat sa chem de mana un system call (20 - getpid) pentru teste,
> > si am folosit urmatorul cod:
> >
> > --------------------------
> >         int pid;
> >
> >         __asm__(
> >                 "movl $20, %eax    \n"
> >                 "int 0x80   \n"
> >                 "movl %eax, pid    \n"
> >         );
> > ---------------------------
> >
> >
> > Totusi codul nu compileaza din cauza ca nu as fi invocat corect
> > intreruperea 80 pentru a porni syscall-ul pus in eax.
> >
> > Ma poate ajuta cineva cu un sfat unde gresesc?
>
>   __asm__(
>                "movl $20, %%eax    \n"
>                "int $0x80   \n"
>            "movl %%eax, %0    \n"
>        :"=r"(pid)
>        );
>
> vezi: http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html
>
> >
> > Multumesc frumos,
> > Alexandru Tudose.
> >
> > _______________________________________________
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> > pso at cursuri.cs.pub.ro
> > http://cursuri.cs.pub.ro/cgi-bin/mailman/listinfo/pso
> --
> Andrei Popa - 341C3
>
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