On 15-May-2002 Dag-Erling Smorgrav wrote:
> Trying to boot with a newly-built loader (make world earlier today
> from fresh sources) results in:
> FreeBSD/alpha SRM disk boot, Revision 1.2
> ([EMAIL PROTECTED], Wed May 15 08:01:43 CEST 2002)
> Memory: 262144 k
> Loading /boot/defaults/loader.conf
> /boot/kernel/kernel data=0x283780+0x63670 /
> Hit [Enter] to boot immediately, or any other key for command prompt.
> Booting [/boot/kernel/kernel]...
> Entering /boot/kernel/kernel at 0xfffffc000032e740...
> halted CPU 0
> halt code = 2
> kernel stack not valid halt
> PC = 200000000
> boot failure
> no matter which kernel I try to boot.  Booting my new kernel with the
> old loader (from the DP1 dist) works fine until it tries to start
> init(8):
> spec_getpages: preposterous offset 0xfff80000f4460000
> exec /sbin/init: error 5
> spec_getpages: preposterous offset 0xfff800001426c000
> exec /sbin/init.bak: error 5
> spec_getpages: preposterous offset 0xfff80000c86c0000
> exec /stand/sysinstall: error 5
> init: not found in path
> /sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall
> panic: no init
> panic
> Stopped at      Debugger+0x34:  zapnot  v0,#0xf,v0      <v0=0x0>
> Booting DP1's GENERIC with the old loader and the new userland works
> fine.
> Clean tree, no funny stuff in make.conf (unless 'CPUTYPE?=ev56' counts
> as funny stuff)
> <guess type="wild">The loader problem is possibly a compiler issue
> (since DP1 was built with gcc 2.95 while my world was built with 3.1).
> The init problem is probably a UFS2 f*up; the code has obviously not
> been tested on a 64-bit architecture (the UFS2 stuff broke the kernel
> build).</guess>

The kernel overflowed it's stack.  In SRM, you can try to debug this
by using 'e sp' to get the stack pointer then get a stack dump and save
a copy of it in a log or something, reboot the machine, then use gdb's
list command on the kernel.debug to figure out the source:line for all
the kernel-text addresses in the stack dump to figure out the backtrace.
>From that you can figure out where the recursion is happening and fix it.


John Baldwin <[EMAIL PROTECTED]>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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