Date: Fri, 30 Apr 1999 09:58:41 -0700 (PDT) From: John Polstra <jdp@polstra.com> To: dwhite@resnet.uoregon.edu Cc: current@freebsd.org Subject: Re: PCM Message-ID: <199904301658.JAA15748@vashon.polstra.com> In-Reply-To: <Pine.BSF.4.03.9904291137380.1166-100000@resnet.uoregon.edu>
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In article <Pine.BSF.4.03.9904291137380.1166-100000@resnet.uoregon.edu>,
Doug White <dwhite@resnet.uoregon.edu> wrote:
> Yes, we know that audio is broken; it's been broken since April 20th.
Well, it's worse than broken. Merely including pcm0 in the kernel
config file causes instant panic on boot-up with my machine (new
kernel built last night from fresh sources):
BIOS basemem (639K) != RTC basemem (640K), setting to BIOS value
Copyright (c) 1992-1999 The FreeBSD Project.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc015983c
stack pointer = 0x10:0xc0303f68
frame pointer = 0x10:0xc0303f70
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 0 ()
interrupt mask = net tty bio cam
kernel: type 12 trap, code=0
Stopped at 0xc015983c: movl 0(%ecx),%ebx
KGDB says there's a NULL item in sysctl_set:
(kgdb) where
#0 sysctl_register_oid (oidp=0x0) at ../../kern/kern_sysctl.c:79
#1 0xc01598f1 in sysctl_register_set (lsp=0xc02885b8)
at ../../kern/kern_sysctl.c:127
#2 0xc0159941 in sysctl_register_all (arg=0x0) at ../../kern/kern_sysctl.c:145
#3 0xc014954a in main (framep=0xc0303fb4) at ../../kern/init_main.c:231
(kgdb) up
#1 0xc01598f1 in sysctl_register_set (lsp=0xc02885b8)
at ../../kern/kern_sysctl.c:127
127 sysctl_register_oid((struct sysctl_oid *) lsp->ls_items[i]);
(kgdb) p *lsp
$1 = {ls_length = 414, ls_items = {0xc026e3e0}}
(kgdb) p i
$2 = 412
(kgdb) p lsp->ls_items[411]
$4 = (void *) 0xc0285bc0
(kgdb) p lsp->ls_items[412]
$5 = (void *) 0x0
(kgdb) p lsp->ls_items[413]
$6 = (void *) 0x4
(kgdb) up
#2 0xc0159941 in sysctl_register_all (arg=0x0) at ../../kern/kern_sysctl.c:145
145 sysctl_register_set(&sysctl_set);
(kgdb) up
#3 0xc014954a in main (framep=0xc0303fb4) at ../../kern/init_main.c:231
231 (*((*sipp)->func))((*sipp)->udata);
I can gather more information if anybody wants it. The kernel works
fine if I take pcm0 out of the config file.
John
--
John Polstra jdp@polstra.com
John D. Polstra & Co., Inc. Seattle, Washington USA
"Self-interest is the aphrodisiac of belief." -- James V. DeLong
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