Date: Sat, 6 May 2006 18:35:47 +0200 From: "Attilio Rao" <asmrookie@gmail.com> To: "Gergely CZUCZY" <phoemix@harmless.hu> Cc: freebsd-hackers@freebsd.org Subject: Re: syscall calling question Message-ID: <3bbf2fe10605060935l280183e9ifb0355970d01c2b8@mail.gmail.com> In-Reply-To: <20060506113936.GA13287@marvin.harmless.hu> References: <20060506113936.GA13287@marvin.harmless.hu>
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The only functions can be called at userspace are syscalls through software interrupt. Attilio 2006/5/6, Gergely CZUCZY <phoemix@harmless.hu>: > hello, > > There's an issue on jails i've decided to look into > (jails keep on stucking into the system). Yet, i examining > the 6-STABLE tree, and there is a point i don't understands > > in libc.so.6 there is jail_attach (i've picked a call) defined, > while i was unable to find any jail-related functions defined in > lib/libc. The only place they are defined is under kern/kern_jail.c, > which has a different prototype than the one in the libc (according > to the manual page and the source of jexec(8)). > > my question is, from a userland libcall, how does a kernel-functions > be invoked? i couldn't figure it out by looking at the source, and > also the developers handbook hadn't told this to me. > > Bye, > > Gergely Czuczy > mailto: gergely.czuczy@harmless.hu > PGP: http://phoemix.harmless.hu/phoemix.pgp > > Weenies test. Geniuses solve problems that arise. > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (GNU/Linux) > > iD8DBQFEXIr4bBsEN0U7BV0RAi+ZAKCsZ2bnLRU67crzWrEwuDBPjOLd2QCfb21X > 3rNhcT0HMGG7WFP2x727d9w= > =hBAi > -----END PGP SIGNATURE----- > > > -- Peace can only be achieved by understanding - A. Einstein
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