"Soumen Biswas" wrote:
> Hello,
>
> What exactly is the difference between syscall & __syscall ?
syscall() and __syscall() are pseudo-syscalls. They take arguments
and evaluate them as though they were real syscalls. You can see the code
in sys/i386/i386/trap.c. __syscall() has 64 bit aligned arguments.
> And in
>
> in kern/init_sysent.c
>
> struct sysent sysent[] = {
> /* ..... */
> { 3, accept},
> /*.......*/
> }
>
> what does 3 denote ?
>
> I believe it's the total size of all the arguments in 32 bit words
Correct. In sizeof(register_t) units. For things that have a 64 bit
argument (eg: lseek()), the off_t counts as two arguments.
> soumen
Cheers,
-Peter
--
Peter Wemm - [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]
"All of this is for nothing if we don't go to the stars" - JMS/B5
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