Date: Sat, 27 Dec 1997 13:50:57 -0800 (PST) From: Chris Timmons <skynyrd@opus.cts.cwu.edu> To: freebsd-current@freebsd.org Subject: no boot: config -g and options DDB Message-ID: <Pine.BSF.3.96.971227133758.3334A-100000@opus.cts.cwu.edu>
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My world and bootblocks are from 12/17 and my kernel sources are from
yesterday. I always hate bringing these things up because invariably it's
me that is broken, but here goes anyways ?<:
If I 'config -g GENERIC' and build/install normally I get a happily
booting kernel. Add:
options DDB
options BREAK_TO_DEBUGGER
and the kernel no longer boots; instead it starts booting and then the
machine behaves as if the reset button had been pushed and the process
repeats (unless -d is present, then the session ends in catatonia.)
I trapped some output from the serial console from a build which did the
same thing but was NOT GENERIC, rather my customized kernel:
- - - - - - - - - - - - - - - (pinwheel graphics removed :)
>> FreeBSD BOOT @ 0x10000: 637/31744 k of memory, serial/dual console
Boot default: 0:sd(0,a)kernel
boot:-d -v
Booting 0:sd(0,a)kernel @ 0x100000
text=0xdd000 data=0x10000 bss=0x1a9b4
symbols=[+0x64c+0x4+0x286734+0x4+0x42762e]
Can't find file kernel.config
total=0x8b5d6a entry point=0x100000
[ preserving 0x6add6c bytes of kernel symbol table ]
Debugger("Boot flags requested debugger")
Stopped at _Debugger+0x35 [../../i386/i386/db_interface.c:58]:
movb $0,_in_Debugger.98
db> next
After 2 instructions (0 loads, 0 stores),
Stopped at _Debugger+0x3d: ret
db> next
BIOS basemem (637K) != RTC basemem (640K), setting to BIOS value
- - - - - - - - - - - - - - -
At this point the machine is really hung and must be powered off to reset.
If someone else could repeat I'll send-pr it...
-Chris
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