On Sat, Sep 29, 2001 at 03:51:12PM +0200, Andreas Persson wrote:
> I actually ran into this problem using -current in april sometime this year.
> I had compiled egcs with -march=... which in turn ended up miscompiling the
> kernel (but nothing else!) causing it to crash right at boot. Took a while
> to track it down ;).

It seems to me it is more of an alignment issue or something.  If I build
with '-Os' it is ok.  If I build with 'options I386_CPU' in addition to 
'options I686_CPU' it is ok.  GENERIC, which has both options is not ok.

If it is of any use, my kernel config is below.

-Andrew


#
#
#

include "arch/i386/conf/std.i386"

maxusers	64		# estimated number of users

# CPU support.  At least one is REQUIRED.
options 	I386_CPU
#options 	I486_CPU
#options 	I586_CPU
options 	I686_CPU

# CPU-related options.
# eliminate delay no-ops in I/O; recommended on all but very old machines
options 	DUMMY_NOPS

options 	MTRR		# memory-type range register syscall support

# Standard system options

options 	UCONSOLE	# users can use TIOCCONS (for xconsole)
options 	INSECURE	# disable kernel security levels

options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
options 	NTP		# NTP phase/frequency locked loop

options 	KTRACE		# system call tracing via ktrace(1)

options 	SYSVMSG		# System V-like message queues
options 	SYSVSEM		# System V-like semaphores
#options 	SEMMNI=10	# number of semaphore identifiers
#options 	SEMMNS=60	# number of semaphores in system
#options 	SEMUME=10	# max number of undo entries per process
#options 	SEMMNU=30	# number of undo structures in system
options 	SYSVSHM		# System V-like memory sharing
#options 	SHMMAXPGS=1024	# 1024 pages is the default

options 	LKM		# loadable kernel modules

# Diagnostic/debugging support options
#options 	DIAGNOSTIC	# expensive kernel consistency checks
#options 	DEBUG		# expensive debugging checks/support
#options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
options 	DDB		# in-kernel debugger
options 	DDB_HISTORY_SIZE=512	# enable history editing in DDB
#options 	KGDB		# remote debugger
#options 	"KGDB_DEVNAME=\"com\"",KGDBADDR=0x3f8,KGDBRATE=9600
#makeoptions	DEBUG="-g"	# compile full symbol table

# Compatibility options
options 	COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
options 	COMPAT_09	# NetBSD 0.9,
options 	COMPAT_10	# NetBSD 1.0,
options 	COMPAT_11	# NetBSD 1.1,
options 	COMPAT_12	# NetBSD 1.2,
options 	COMPAT_13	# NetBSD 1.3,
options 	COMPAT_14	# NetBSD 1.4,
options 	COMPAT_15	# NetBSD 1.5,
options 	COMPAT_43	# and 4.3BSD
#options 	COMPAT_386BSD_MBRPART # recognize old partition ID
#options 	TCP_COMPAT_42	# 4.2BSD TCP/IP bug compat. Not recommended.

#options 	COMPAT_LINUX	# binary compatibility with Linux
#options 	COMPAT_FREEBSD	# binary compatibility with FreeBSD

# File systems
file-system 	FFS		# UFS
file-system 	MFS		# memory file system
file-system 	NFS		# Network File System client
file-system 	CD9660		# ISO 9660 + Rock Ridge file system
file-system 	MSDOSFS		# MS-DOS file system
file-system 	KERNFS		# /kern
file-system 	NULLFS		# loopback file system
file-system 	PROCFS		# /proc
file-system 	UNION		# union file system

# File system options
options 	SOFTDEP         # FFS soft updates support.

# Networking options
options 	INET		# IP + ICMP + TCP + UDP
options		NMBCLUSTERS=8192
#options 	INET6		# IPV6
#options 	IPSEC		# IP security
#options 	IPSEC_ESP	# IP security (encryption part; define w/IPSEC)
#options 	IPSEC_DEBUG	# debug for IP security

# These options enable verbose messages for several subsystems.
# Warning, these may compile large string tables into the kernel!
options 	MIIVERBOSE	# verbose PHY autoconfig messages
options 	PCIVERBOSE	# verbose PCI device autoconfig messages

options 	NFS_BOOT_DHCP,NFS_BOOT_BOOTPARAM

#
# wscons options
#
# builtin terminal emulations
#options 	WSEMUL_SUN		# sun terminal emulation
options 	WSEMUL_VT100		# VT100 / VT220 emulation
# different kernel output - see dev/wscons/wsdisplayvar.h
options 	WS_KERNEL_FG=WSCOL_GREEN
#options 	WS_KERNEL_BG=WSCOL_BLACK
# compatibility to other console drivers
options 	WSDISPLAY_COMPAT_PCVT		# emulate some ioctls
options 	WSDISPLAY_COMPAT_SYSCONS	# emulate some ioctls
options 	WSDISPLAY_COMPAT_USL		# VT handling
options 	WSDISPLAY_COMPAT_RAWKBD		# can get raw scancodes
# see dev/pckbc/wskbdmap_mfii.c for implemented layouts
#options 	PCKBD_LAYOUT="(KB_DE | KB_NODEAD)"
# allocate a number of virtual screens at autoconfiguration time
#options 	WSDISPLAY_DEFAULTSCREENS=4
# use a large software cursor that doesn't blink
options 	PCDISPLAY_SOFTCURSOR
# modify the screen type of the console; defaults to "80x25"
#options 	VGA_CONSOLE_SCREENTYPE="\"80x24\""

# Kernel root file system and dump configuration.
#config		netbsd	root on ? type ?
#config		netbsd	root on sd0a type ffs
config		netbsd	root on ? type nfs

#
# Device configuration
#

mainbus0 at root

apm0	at mainbus0			# Advanced power management

# Tuning for power management, see apm(4) for more details.
#options 	APM_NO_IDLE		# Don't call BIOS CPU idle function
#options 	APM_V10_ONLY		# Use only the APM 1.0 calls
#options 	APM_NO_POWEROFF		# Don't power off on halt(8)
#options 	APM_POWER_PRINT		# Print stats on the console
#options 	APM_DISABLE_INTERRUPTS=0 # Don't disable interrupts


# Basic Bus Support

# PCI bus support
pci*	at mainbus? bus ?
pci*	at pchb? bus ?
pci*	at ppb? bus ?

# PCI bridges
pchb*	at pci? dev ? function ?	# PCI-Host bridges
pcib*	at pci? dev ? function ?	# PCI-ISA bridges
ppb*	at pci? dev ? function ?	# PCI-PCI bridges

agp* 	at pchb?

# ISA bus support
isa0	at mainbus?
isa0	at pcib?

# ISA Plug-and-Play bus support
isapnp0	at isa?

# Coprocessor Support

# Math Coprocessor support
npx0	at isa? port 0xf0 irq 13	# x86 math coprocessor


# Console Devices

# wscons
pckbc0		at isa?			# pc keyboard controller
pckbd*		at pckbc?		# PC keyboard
# "opms" should not be enabled together with "pms" or "pmsi"
pms*		at pckbc?		# PS/2 mouse for wsmouse
pmsi*		at pckbc?		# PS/2 "Intelli"mouse for wsmouse
vga*		at pci? dev ? function ?
wsdisplay*	at vga? console ?
wskbd* 		at pckbd? console ?
wsmouse*	at pms? mux 0
wsmouse*	at pmsi? mux 0

pcppi0		at isa?
sysbeep0	at pcppi?

# Serial Devices

# ISA serial interfaces
#options 	COM_HAYESP		# adds Hayes ESP serial board support
com0	at isa? port 0x3f8 irq 4	# Standard PC serial ports
com1	at isa? port 0x2f8 irq 3

# Parallel Printer Interfaces

# ISA parallel printer interfaces
lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports

# Hardware monitors 

# LM7[89] and compatible hardware monitors
lm0	at isa?	port 0x290		# other common ports: 0x280, 0x310

# IDE and related devices
# PCI IDE controllers - see pciide(4) for supported hardware.
# The 0x0001 flag force the driver to use DMA, even if the driver doesn't know
# how to set up DMA modes for this chip. This may work, or may cause
# a machine hang with some controllers.
pciide* at pci? dev ? function ? flags 0x0000

# IDE drives
# Flags are used only with controllers that support DMA operations
# and mode settings (e.g. some pciide controllers)
# The lowest order four bits (rightmost digit) of the flags define the PIO
# mode to use, the next set of four bits the DMA mode and the third set the
# UltraDMA mode. For each set of four bits, the 3 lower bits define the mode
# to use, and the last bit must be 1 for this setting to be used.
# For DMA and UDMA, 0xf (1111) means 'disable'.
# 0x0fac means 'use PIO mode 4, DMA mode 2, disable UltraDMA'.
# (0xc=1100, 0xa=1010, 0xf=1111)
# 0x0000 means "use whatever the drive claims to support".
wd*	at pciide? channel ? drive ? flags 0x0000

# ATAPI bus support
atapibus* at pciide? channel ?

# ATAPI devices
# flags have the same meaning as for IDE drives.
cd*	at atapibus? drive ? flags 0x0000	# ATAPI CD-ROM drives
sd*	at atapibus? drive ? flags 0x0000	# ATAPI disk drives
uk*	at atapibus? drive ? flags 0x0000	# ATAPI unknown


# Miscellaneous mass storage devices

# ISA floppy
fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
fd0	at fdc0 drive 0

# Network Interfaces

# PCI network interfaces
fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B

# MII/PHY support
#inphy*	at mii? phy ?			# Intel 82555 PHYs

# USB Controller and Devices

# PCI USB controllers
uhci*	at pci?	dev ? function ?	# Universal Host Controller (Intel)

# USB bus support
usb*	at uhci?

# USB Hubs
uhub*	at usb?
uhub*	at uhub? port ? configuration ? interface ?

# USB Generic driver
ugen*	at uhub? port ?

# Pseudo-Devices

# disk/mass storage pseudo-devices
pseudo-device	md		1	# memory disk device (ramdisk)
pseudo-device	vnd		4	# disk-like interface to files

# network pseudo-devices
pseudo-device	bpfilter	8	# Berkeley packet filter
pseudo-device	loop			# network loopback
#pseudo-device	vlan			# IEEE 802.1q encapsulation

# miscellaneous pseudo-devices
pseudo-device	pty			# pseudo-terminals
pseudo-device	rnd			# /dev/random and in-kernel generator

# mouse & keyboard multiplexor pseudo-devices
#pseudo-device	wsmux		2