syscalls implementation

[Shawn Webb]

You could overwrite sysent[SYS_kldload] to point to your own kldload
function. After you do what you want to, you return what the original
kldload returns. Meaning, call the original kldload and return it's value.

int (*orig_kldload)(struct thread *, struct kldload_args *) =
sysent[SYS_kldload];
int my_kldload(struct thread *, struct kldload_args *);

int my_kldload(struct thread *td, struct kldload_args *uap)
{
    do_stuff_here();

    return (*orig_kldload)(td, uap);
}

lattera

----- Original Message ----- 
From: "Mmaist" <mmaist at email.it>
To: <freebsd-hackers at freebsd.org>
Sent: Wednesday, August 25, 2004 7:30 AM
Subject: syscalls implementation


> Hi!
> I was wondering were syscalls implementation is in the FreeBSD source
tree.
> I would like to know, especially, where
>
> int kldload(const char*);
>
> is located. sys/kern/kern_linker.c contains
>
> int
> kldload(struct thread *, struct kldload_args *)
>
> and I need to watch at what called between them.
>
> thanks,
>
> markus
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