On Wednesday, December 01, 2010 4:09:42 pm Darmawan Salihun wrote: > Hi John, > > --- On Tue, 11/30/10, John Baldwin <j...@freebsd.org> wrote: > > > From: John Baldwin <j...@freebsd.org> > > Subject: Re: How to debug BTX loader? > > To: freebsd-hackers@freebsd.org > > Cc: "Darmawan Salihun" <darmawan_sali...@yahoo.com> > > Date: Tuesday, November 30, 2010, 9:38 AM > > On Monday, November 29, 2010 1:01:27 > > pm Darmawan Salihun wrote: > > > Hi guys, > > > > > > I'm currently working on a BIOS for a custom Single > > Board Computer (SBC). > > > I have the required BIOS source code and tools at > > hand. > > > However, the boot process always stuck in the BTX > > loader > > > (the infamous "ACPI autoload failed") when I booted > > out of USB stick > > > (with the FreeBSD 8.1 USB stick image). > > > > > > I could get the system to boot into FreeBSD 8.1 > > > (by keeping the CDROM tray open and close it when the > > board looks for > > > boot device, otherwise BTX will reboot instantly). > > > > Are you getting an actual BTX error message or a > > freeze? BTX is just a > > minikernel written all in assembly. It doesn't handle > > loading the kernel, > > etc. All that work is done by the /boot/loader > > program (which is written in > > C). You can find all the source to the boot code in > > src/sys/boot. The BTX > > kernel is in src/sys/boot/i386/btx/btx/. > > > > However, to debug this further we would need more info such > > as what exactly > > you are seeing (a hang, a BTX fault with a register dump, > > etc.). > > One of the BTX fault shows the register dump in the attachment. > I hope this could help. Anyway, If I were to try to interpret > such register dump, where should I start? I understand x86/x86_64 > assembly pretty much, but I'm not quite well versed with the > FreeBSD code using it.
Looks like the mailing list stripped the attachment. Can you post the attachment at a URL? -- John Baldwin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
