[pso] Tema 1 Linux - Invocare de mana system call
Andrei Popa
ca at i-neo.ro
Fri Mar 16 00:31:11 EET 2007
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.
>
> _______________________________________________
> pso mailing list
> pso at cursuri.cs.pub.ro
> http://cursuri.cs.pub.ro/cgi-bin/mailman/listinfo/pso
--
Andrei Popa - 341C3
More information about the pso
mailing list