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Date:      Thu, 18 May 2000 16:29:32 -0700
From:      "Lew Glendenning" <rlglende@alink.net>
To:        <questions@FreeBSD.ORG>
Subject:   Linux emulation -> "Fatal trap 12 -- page fault while in kernel mode"
Message-ID:  <00a801bfc120$ebbe8870$0100a8c0@landg01>
In-Reply-To: <20000518115249.B21508@fw.wintelcom.net>

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With the following kernel configuration for BSD4.0-stable AND rc.conf
"linux_enable="YES":

Booting system checks file systems, starts daemons, initial rc.i386 linux,
then

Fatal trap 12 page fault while in kernel mode
Fault virtual address 	= 0x18
	fault code		= supervisor read, page not present
	instruction ptr	= 0x8: 0xc12000dbb
	stack ptr		= 0x10: 0xcf883f10
	frame ptr		= 0x10: 0xcf883f2c
	code seg		= base 0x0, limit 0xfffff, type 0x1b, =DPL 0, Pres1, def32 1,
gran 1
	procesor eflags = interrupt enabled, resume, IOPL=0
	Interrupt mask = none
	trap number = 12
	panic: page fault

(My handwriting is lousy, so probably a typo or two in the transcription.)

With rc.conf "linux_enable="NO", it boots fine.

kernel configuration is:

#
# GENERIC -- Generic kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.freebsd.org/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.ORG/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ./LINT configuration file. If you are
# in doubt as to the purpose or necessity of a line, check first in LINT.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.246 2000/03/09 16:32:55 jlemon Exp
$

machine         i386
cpu             I386_CPU
cpu             I486_CPU
cpu             I586_CPU
cpu             I686_CPU
ident           GENERIC
maxusers        64

#makeoptions    DEBUG=-g                #Build kernel with gdb(1) debug
symbols

options         MATH_EMULATE            #Support for x87 emulation
options         INET                    #InterNETworking
options         INET6                   #IPv6 communications protocols
options         FFS                     #Berkeley Fast Filesystem
options         FFS_ROOT                #FFS usable as root device [keep
this!]
options         MFS                     #Memory Filesystem
options         MD_ROOT                 #MD is a potential root device
options         NFS                     #Network Filesystem
options         NFS_ROOT                #NFS usable as root device, NFS
required
options         MSDOSFS                 #MSDOS Filesystem
options         CD9660                  #ISO 9660 Filesystem
options         CD9660_ROOT             #CD-ROM usable as root, CD9660
required
options         PROCFS                  #Process filesystem
options         COMPAT_43               #Compatible with BSD 4.3 [KEEP
THIS!]
options         SCSI_DELAY=15000        #Delay (in ms) before probing SCSI
options         UCONSOLE                #Allow users to grab the console
options         USERCONFIG              #boot -c editor
options         VISUAL_USERCONFIG       #visual boot -c editor
options         KTRACE                  #ktrace(1) support
options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores
#options        P1003_1B                #Posix P1003_1B real-time extentions
#options        _KPOSIX_PRIORITY_SCHEDULING
options         ICMP_BANDLIM            #Rate limit bad replies

# To make an SMP kernel, the next two are needed
#options        SMP                     # Symmetric MultiProcessor Kernel
#options        APIC_IO                 # Symmetric (APIC) I/O
# Optionally these may need tweaked, (defaults shown):
#options        NCPU=2                  # number of CPUs
#options        NBUS=4                  # number of busses
#options        NAPIC=1                 # number of IO APICs
#options        NINTR=24                # number of INTs

device          isa
device          eisa
device          pci

# Floppy drives
device          fdc0    at isa? port IO_FD1 irq 6 drq 2
device          fd0     at fdc0 drive 0
device          fd1     at fdc0 drive 1

# ATA and ATAPI devices
device          ata0    at isa? port IO_WD1 irq 14
device          ata1    at isa? port IO_WD2 irq 15
device          ata
device          atadisk                 # ATA disk drives
device          atapicd                 # ATAPI CDROM drives
device          atapifd                 # ATAPI floppy drives
device          atapist                 # ATAPI tape drives
options         ATA_STATIC_ID           #Static device numbering
#options        ATA_ENABLE_ATAPI_DMA    #Enable DMA on ATAPI devices

# SCSI Controllers
#device         ahb             # EISA AHA1742 family
#device         ahc             # AHA2940 and onboard AIC7xxx devices
#device         amd             # AMD 53C974 (Teckram DC-390(T))
#device         dpt             # DPT Smartcache - See LINT for options!
#device         isp             # Qlogic family
#device         ncr             # NCR/Symbios Logic
#device         sym             # NCR/Symbios Logic (newer chipsets)
#
#device         adv0    at isa?
#device         adw
#device         bt0     at isa?
#device         aha0    at isa?
#device         aic0    at isa?

# SCSI peripherals
#device         scbus           # SCSI bus (required)
#device         da              # Direct Access (disks)
#device         sa              # Sequential Access (tape etc)
#device         cd              # CD
#device         pass            # Passthrough device (direct SCSI access)

# RAID controllers
#device         ida             # Compaq Smart RAID
#device         amr             # AMI MegaRAID
#device         mlx             # Mylex DAC960 family

# atkbdc0 controls both the keyboard and the PS/2 mouse
device          atkbdc0 at isa? port IO_KBD
device          atkbd0  at atkbdc? irq 1
device          psm0    at atkbdc? irq 12

device          vga0    at isa?

# splash screen/screen saver
pseudo-device   splash

# syscons is the default console driver, resembling an SCO console
device          sc0     at isa?

# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device         vt0     at isa?
#options        XSERVER                 # support for X server on a vt
console
#options        FAT_CURSOR              # start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT
lines
#options        PCVT_SCANSET=2          # IBM keyboards are non-std

# Floating point support - do not disable.
device          npx0    at nexus? port IO_NPX irq 13

# Power management support (see LINT for more options)
#device         apm0    at nexus? disable flags 0x20 # Advanced Power
Management

# PCCARD (PCMCIA) support
#device         card
#device         pcic0   at isa? irq 10 port 0x3e0 iomem 0xd0000
#device         pcic1   at isa? irq 11 port 0x3e2 iomem 0xd4000 disable
# Serial (COM) ports
device          sio0    at isa? port IO_COM1 flags 0x10 irq 4
device          sio1    at isa? port IO_COM2 irq 3
#device         sio2    at isa? disable port IO_COM3 irq 5
#device         sio3    at isa? disable port IO_COM4 irq 9

# Parallel port
device          ppc0    at isa? irq 7
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device
#device         vpo             # Requires scbus and da


# PCI Ethernet NICs.
#device         de              # DEC/Intel DC21x4x (``Tulip'')
#device         fxp             # Intel EtherExpress PRO/100B (82557, 82558)
#device         tx              # SMC 9432TX (83c170 ``EPIC'')
#device         vx              # 3Com 3c590, 3c595 (``Vortex'')
#device         wx              # Intel Gigabit Ethernet Card (``Wiseman'')

# PCI Ethernet NICs that use the common MII bus controller code.
device          miibus          # MII bus support
#device         dc              # DEC/Intel 21143 and various workalikes
#device         rl              # RealTek 8129/8139
#device         sf              # Adaptec AIC-6915 (``Starfire'')
#device         sis             # Silicon Integrated Systems SiS 900/SiS
7016
#device         ste             # Sundance ST201 (D-Link DFE-550TX)
#device         tl              # Texas Instruments ThunderLAN
#device         vr              # VIA Rhine, Rhine II
#device         wb              # Winbond W89C840F
device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')

# ISA Ethernet NICs.
#device         ed0     at isa? port 0x280 irq 10 iomem 0xd8000
#device         ex
#device         ep
# WaveLAN/IEEE 802.11 wireless NICs. Note: the WaveLAN/IEEE really
# exists only as a PCMCIA device, so there is no ISA attatement needed
# and resources will always be dynamically assigned by the pccard code.
device          wi
# Aironet 4500/4800 802.11 wireless NICs. Note: the declaration below will
# work for PCMCIA and PCI cards, as well as ISA cards set to ISA PnP
# mode (the factory default). If you set the switches on your ISA
# card for a manually chosen I/O address and IRQ, you must specify
# those paremeters here.
#device         an
# The probe order of these is presently determined by i386/isa/isa_compat.c.
#device         ie0     at isa? port 0x300 irq 10 iomem 0xd0000
#device         fe0     at isa? port 0x300
#device         le0     at isa? port 0x300 irq 5 iomem 0xd0000
#device         lnc0    at isa? port 0x280 irq 10 drq 0
#device         cs0     at isa? port 0x300
#device         sn0     at isa? port 0x300 irq 10
# requires PCCARD (PCMCIA) support to be activated
#device         xe0     at isa?

# Pseudo devices - the number indicates how many units to allocated.
pseudo-device   loop            # Network loopback
pseudo-device   ether           # Ethernet support
pseudo-device   sl      1       # Kernel SLIP
pseudo-device   ppp     1       # Kernel PPP
pseudo-device   tun             # Packet tunnel.
pseudo-device   pty             # Pseudo-ttys (telnet etc)
pseudo-device   md              # Memory "disks"
pseudo-device   gif     4       # IPv6 and IPv4 tunneling
pseudo-device   faith   1       # IPv6-to-IPv4 relaying (translation)

# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
#pseudo-device  bpf             #Berkeley packet filter

# USB support
#device         uhci            # UHCI PCI->USB interface
#device         ohci            # OHCI PCI->USB interface
#device         usb             # USB Bus (required)
#device         ugen            # Generic
#device         uhid            # "Human Interface Devices"
#device         ukbd            # Keyboard
#device         ulpt            # Printer
#device         umass           # Disks/Mass storage - Requires scbus and da
#device         ums             # Mouse
# USB Ethernet, requires mii
#device         aue             # ADMtek USB ethernet
#device         cue             # CATC USB ethernet
#device         kue             # Kawasaki LSI USB ethernet


# OnMedia webserver stuff
options SYSVSHM
options SYSVSEM
options SYSVMSG
#options "CHILD_MAX=256"
#options "OPEN_MAX=256"



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