> Date: Tue, 8 Oct 2024 20:14:52 +0200
> From: Alexander Bluhm <bl...@openbsd.org>
>
> On Tue, Oct 08, 2024 at 02:57:25PM +0200, Frank Brodbeck wrote:
> > Oct 8 13:28:14 quirm /bsd: OpenBSD 7.6 (RAMDISK_CD) #326: Mon Sep 30
> > 09:00:03 MDT 2024
> > Oct 8 13:28:14 quirm /bsd:
> > dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
>
> Kernel bsd.rd does not use relinking. So we can find the code from rip.
>
> > Oct 8 13:28:14 quirm /bsd: root on rd0a swap on rd0b dump on rd0b
> > Oct 8 13:28:14 quirm /bsd: WARNING: CHECK AND RESET THE DATE!
> > Oct 8 13:28:14 quirm /bsd: uvm_fault(0xfffffd827dc3e810, 0x0, 0, 1) -> e
> > Oct 8 13:28:14 quirm /bsd: fatal page fault in supervisor mode
> > Oct 8 13:28:14 quirm /bsd: trap type 6 code 0 rip ffffffff81374c4c cs 8
> > rflags 10246 cr2 0 cpl 0 rsp ffff80002f25dbb0
>
> Sorted nm output of release bsd.rd says
>
> ffffffff81374c2c T wsdisplaywrite
> ffffffff81374c83 T wsdisplaytty
>
> rip is ffffffff81374c4c, look at wsdisplaywrite+0x20
>
> 0000000000000fac <wsdisplaywrite>:
> ...
> /usr/src/sys/dev/wscons/wsdisplay.c:1019
> fcc: 48 8b 04 f8 mov (%rax,%rdi,8),%rax
> /usr/src/sys/dev/wscons/wsdisplay.c:1024
>
> So it happens here:
>
> 1010 int
> 1011 wsdisplaywrite(dev_t dev, struct uio *uio, int flag)
> 1012 {
> 1013 struct wsdisplay_softc *sc;
> 1014 struct tty *tp;
> 1015 int unit;
> 1016 struct wsscreen *scr;
> 1017
> 1018 unit = WSDISPLAYUNIT(dev);
> * 1019 sc = wsdisplay_cd.cd_devs[unit];
> 1020
> 1021 if (ISWSDISPLAYCTL(dev))
> 1022 return (0);
> 1023
> 1024 if ((scr = sc->sc_scr[WSDISPLAYSCREEN(dev)]) == NULL)
>
> > Oct 8 13:28:14 quirm /bsd: gsbase 0xffffffff81938ff0 kgsbase 0x0
> > Oct 8 13:28:14 quirm /bsd: panic: trap type 6, code=0, pc=ffffffff81374c4c
> > Oct 8 13:28:14 quirm /bsd: panic: trap type 6, code=0, pc=ffffffff81374c4c
> > Oct 8 13:28:14 quirm /bsd: dump to dev 17,1 not possible
> > Oct 8 13:28:14 quirm /bsd: rebooting...
So there is no wsdisplay(4) device attaching. I also don't see efi(4)
attaching. Is this a legacy BIOS boot? If so, switch to UEFI boot.
