I'm running a custom kernel (because it's required). The only change I made was uncommenting the following line.
option NETATALK # AppleTalk I installed netatalk from packages. and when I try to start it I immediately get a ddb> prompt # sh /etc/netatalk/rc.atalk starting appletalk daemons:uvm_fault(0xd66c8008, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ifa_add+0x9: cmpb $0x12,0x1(%eax) ddb> trace ifa_add(d1b32c00,d1c15480,4,dbec5e78,194f80) at ifa_add+0x9 at_control(8020690c,dbec5e78,d1b32c00,d66e42cc,d1b32c00,d66e42cc,dbec5da0,d03a7 51a) at at_control+0x27a ifioctl(d676177c,8020690c,dbec5e78,d66e42cc,0) at ifioctl+0x1d8 sys_ioctl(d66e42cc,dbec5f68,dbec5f58,4,89) at sys_ioctl+0x125 syscall() at syscall+0x24e --- syscall (number 54) --- 0xa6a22d1: ddb> ps PID PPID PGRP UID S FLAGS WAIT COMMAND *31082 29496 31082 0 7 0 atalkd 29496 11251 11251 0 3 0x4082 wait atalkd 11251 19979 11251 0 3 0x4082 pause sh 28643 13906 21838 502 2 0x4580 mysqld 19979 1 19979 0 3 0x4082 pause ksh 12444 1 12444 0 3 0x4082 ttyin getty 12407 1 12407 0 3 0x4082 ttyin getty 31882 1 31882 0 3 0x4082 ttyin getty 1902 1 1902 0 3 0x4082 ttyin getty 10436 1 10436 0 3 0x4082 ttyin getty 10021 1 10021 0 3 0x80 select cron 7284 1 21838 0 3 0x40182 select dopewars 19721 1 11920 0 3 0x80 select snmpd 11007 11486 11486 67 3 0x180 netcon httpd 13450 11486 11486 67 3 0x180 netcon httpd 2266 11486 11486 67 3 0x180 netcon httpd 16688 11486 11486 67 3 0x180 netcon httpd 7305 11486 11486 67 3 0x180 netcon httpd 28221 11486 11486 67 3 0x180 netcon httpd 7946 11486 11486 67 3 0x180 netcon httpd 26505 11486 11486 67 3 0x180 netcon httpd 22980 11486 11486 67 3 0x180 netcon httpd 27215 11486 11486 67 3 0x180 netcon httpd 19430 11486 11486 67 3 0x180 netcon httpd 14445 11486 11486 67 3 0x180 netcon httpd 10526 11486 11486 67 3 0x180 netcon httpd 10894 11486 11486 67 3 0x180 netcon httpd 17826 11486 11486 67 3 0x180 netcon httpd 13906 1 21838 0 3 0x4082 pause sh 21201 1 21201 0 3 0x180 select inetd 11486 1 11486 0 3 0x80 select httpd 19402 1 19402 0 3 0x40180 select sendmail 30123 1 30123 0 3 0x80 select sshd 24933 1 24933 0 3 0x80 poll ntpd 14964 28444 14964 83 3 0x180 poll ntpd 28444 1 28444 83 3 0x180 poll ntpd 25465 26183 26183 74 3 0x180 bpf pflogd 26183 1 26183 0 3 0x80 netio pflogd 29418 21378 21378 73 2 0x180 syslogd 21378 1 21378 0 3 0x88 netio syslogd 14808 1 14808 77 3 0x180 poll dhclient 21518 1 21838 0 3 0x82 poll dhclient 16 0 0 0 3 0x100200 bored crypto 15 0 0 0 3 0x100200 aiodoned aiodoned 14 0 0 0 3 0x100200 syncer update 13 0 0 0 3 0x100200 cleaner cleaner 12 0 0 0 3 0x100200 reaper reaper 11 0 0 0 3 0x100200 pgdaemon pagedaemon 10 0 0 0 3 0x100200 pftm pfpurge 9 0 0 0 3 0x100200 usbevt usb2 8 0 0 0 3 0x100200 usbevt usb1 7 0 0 0 3 0x100200 usbtsk usbtask 6 0 0 0 3 0x100200 usbevt usb0 5 0 0 0 3 0x100200 acpi_idle acpi0 4 0 0 0 3 0x100200 bored syswq 3 0 0 0 3 0x40100200 idle0 2 0 0 0 3 0x100200 kmalloc kmthread 1 0 1 0 3 0x4080 wait init 0 -1 0 0 3 0x80200 scheduler swapper OpenBSD 4.7-stable (GENERIC) #9: Fri Sep 24 02:03:40 PDT 2010 r...@servy.allyourbasearebelongto.us:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Pentium(R) 4 CPU 2.40GHz ("GenuineIntel" 686-class) 2.42 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,CNXT-ID,xTPR real mem = 1039695872 (991MB) avail mem = 998645760 (952MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 04/01/04, BIOS32 rev. 0 @ 0xfa800, SMBIOS rev. 2.3 @ 0xf0100 (34 entries) bios0: vendor Award Software International, Inc. version "F5" date 04/01/2004 bios0: Gigabyte Technology Co., Ltd. GA-8S661FXM acpi0 at bios0: rev 0 acpi0: tables DSDT FACP APIC acpi0: wakeup devices USB0(S1) USB1(S1) USB2(S1) MAC0(S5) AMR0(S4) UAR1(S4) UAR2(S4) PCI0(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: apic clock running at 133MHz ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 14, 24 pins acpiprt0 at acpi0: bus 0 (PCI0) acpicpu0 at acpi0 acpibtn0 at acpi0: PWRB bios0: ROM list: 0xc0000/0x8000 pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 "SiS 661 PCI" rev 0x11 sisagp0 at pchb0 agp0 at sisagp0: aperture at 0xe8000000, size 0x4000000 ppb0 at pci0 dev 1 function 0 "SiS 648FX AGP" rev 0x00 pci1 at ppb0 bus 1 vga1 at pci1 dev 0 function 0 "SiS 6330 VGA" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) pcib0 at pci0 dev 2 function 0 "SiS 85C503 System" rev 0x25 pciide0 at pci0 dev 2 function 5 "SiS 5513 EIDE" rev 0x00: 661: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility wd0 at pciide0 channel 0 drive 0: <WDC WD800BB-00JHA0> wd0: 16-sector PIO, LBA, 76318MB, 156299375 sectors wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 atapiscsi0 at pciide0 channel 1 drive 0 scsibus0 at atapiscsi0: 2 targets cd0 at scsibus0 targ 0 lun 0: <SONY, CD-ROM CDU5212, 5YS1> ATAPI 5/cdrom removable cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 auich0 at pci0 dev 2 function 7 "SiS 7012 AC97" rev 0xa0: apic 2 int 18 (irq 10), SiS7012 AC97 ac97: codec id 0x414c4720 (Avance Logic ALC650) ac97: codec features 20 bit DAC, 18 bit ADC, Realtek 3D audio0 at auich0 ohci0 at pci0 dev 3 function 0 "SiS 5597/5598 USB" rev 0x0f: apic 2 int 20 (irq 9), version 1.0, legacy support ohci1 at pci0 dev 3 function 1 "SiS 5597/5598 USB" rev 0x0f: apic 2 int 21 (irq 5), version 1.0, legacy support ehci0 at pci0 dev 3 function 3 "SiS 7002 USB" rev 0x00: apic 2 int 23 (irq 12) usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "SiS EHCI root hub" rev 2.00/1.00 addr 1 rl0 at pci0 dev 15 function 0 "Realtek 8139" rev 0x10: apic 2 int 16 (irq 11), address 00:0d:61:2e:78:27 rlphy0 at rl0 phy 0: RTL internal PHY isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo com0: console com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 pcppi0 at isa0 port 0x61 midi0 at pcppi0: <PC speaker> spkr0 at pcppi0 lpt0 at isa0 port 0x378/4 irq 7 it0 at isa0 port 0x2e/2: IT8705F rev 2, EC port 0x290 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 fdc0 at isa0 port 0x3f0/6 irq 6 drq 2 fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec usb1 at ohci0: USB revision 1.0 uhub1 at usb1 "SiS OHCI root hub" rev 1.00/1.00 addr 1 usb2 at ohci1: USB revision 1.0 uhub2 at usb2 "SiS OHCI root hub" rev 1.00/1.00 addr 1 mtrr: Pentium Pro MTRR support vscsi0 at root scsibus1 at vscsi0: 256 targets softraid0 at root root on wd0a swap on wd0b dump on wd0b