Date: Fri, 23 Nov 2007 19:59:54 -0800 From: Julian Elischer <julian@elischer.org> To: Aryeh Friedman <aryeh.friedman@gmail.com> Cc: Attilio Rao <attilio@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: a strange/stupid question Message-ID: <4747A1BA.6020505@elischer.org> In-Reply-To: <bef9a7920711231941h41f04cbbi53d24b791170a6bd@mail.gmail.com> References: <bef9a7920711231933g4b7e7717sf4667773188f28a@mail.gmail.com> <3bbf2fe10711231937y1e9af357hd8b6a63cbf6ae077@mail.gmail.com> <bef9a7920711231941h41f04cbbi53d24b791170a6bd@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Aryeh Friedman wrote: > On 11/24/07, Attilio Rao <attilio@freebsd.org> wrote: >> 2007/11/24, Aryeh Friedman <aryeh.friedman@gmail.com>: >>> Where do I find the main() [and/or other entery point] for the >>> kernel.... I tend to understand stuff better if I follow the flow of >>> exec from the start >> It is highly MD. >> For IA32 it is in i386/i386/locore.s::btext > > For AMD64 I assume something close to that... > > I just relized that I actually want to understand everything from POST > on (actually from power on but I know that is very mobo dependant) so > I guess the question is where do I find the first executed statement > for BTX (I know how to disamble the MBR so that part is not an issue) > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" As Attilio said: for the kernel, execution starts (for the x86) in /usr/src/sys/i386/i386/locore.s at around line 205. look for: /********************************************************************** * * This is where the bootblocks start us, set the ball rolling... * */ NON_GPROF_ENTRY(btext) it then skips to sys/kern/init_main.c (mi_startup) (from memory) and that jumps back to machdep.c (cpu_startup()) I suggest of course that you also read the bootblocks.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4747A1BA.6020505>