[cobalt-developers] RAQ XTR kernel panic while building kernel

["Greg Larkin" <glarkin@xxxxxxxxxxx>]

Hi all,

As you may have seen in my previous message, I am having trouble loading the
aic7xxx kernel module with modprobe on my RAQ XTR machine.  The machine
immediately crashes with no messages to the console port.  I'm now trying to
build a new kernel that has the driver compiled in to see if that improves
the behavior of the system.  Of course, I'm running into problems with that!

I have done the following things in the /usr/src/linux directory:

make menuconfig
make dep
make cobalt

All of that works great until the very end of the kernel build.  I see this
in the telnet window where I am building:

.... lots of stuff ....
strip vmlinux
gzip -f -9 vmlinux

And in the window that's monitoring the console serial port, I see:

Unable to handle kernel NULL pointer dereference at virtual address 00000003
current->tss.cr3 = 00101000, %cr3 = 00101000
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<80121a15>]
EFLAGS: 00010046
eax: 804fed10   ebx: 0000faba   ecx: 80266940   edx: ffffffff
esi: 00007d5d   edi: ffffffff   ebp: 00000202   esp: 8fefbcb0
ds: 0018   es: 0018   ss: 0018
Process init (pid: 1, process nr: 1, stackpage=8fefb000)
Stack: 8fba1084 8fb8a13c 00000000 8fefbcd4 00000001 80266940 00000000
8022be00
       300002da 801223a7 0044e000 00000001 000000c8 000087b4 8fed9a00
801c08a8
       00000001 8011a3f0 8faba000 00000001 8fefbe14 00000004 8fba00a0
0804e000
Call Trace: [<8022be00>] [<801223a7>] [<801c08a8>] [<8011a3f0>] [<801114e0>]
[<8
011bef9>] [<8010a836>]
       [<8011275d>] [<80112754>] [<801181c8>] [<80112715>] [<801171d6>]
[<801171
cd>] [<80109ae8>] [<80109ac0>]
       [<801f8820>] [<8010eeaf>] [<801f886e>] [<801a58f1>] [<80109705>]
[<801b00
18>] [<80121a15>] [<80121a4e>]
       [<8012e5cc>] [<8012e8a8>] [<8012e87c>] [<8012ed48>] [<801095f4>]
[<80117b
55>] [<801095f0>]
Code: 89 42 04 89 01 ff 41 0c 55 9d 5b 5e 5f 5d 83 c4 1c c3 05 00

My question is - should I be doing something different to rebuild the
kernel?  I had tried "make bzImage" first, but I found out that won't work
on the Cobalt machine.  I can access the boot menu via the serial port
console, so I think I can boot a rebuilt kernel from the disk once the build
succeeds.  Does anyone have a pointer to instructions on building a custom
Cobalt kernel on the RAQ XTR?

Thanks,
Greg Larkin