Re: Experimental MIPS 2.6 kernels - please test
On Tue, Feb 07, 2006 at 11:22:37PM +0100, Christian Engwer wrote:
> On Tue, Feb 07, 2006 at 01:42:45PM +0000, Martin Michlmayr wrote:
> > * Christian Engwer <christi@uni-hd.de> [2006-02-07 14:19]:
> > > I tried to boot the new kernel on my O2, but arcboot was not able to
> > > load the kernel.
> >
> > What error message do you get?
>
> It successfully loads the kernel into memory, but then receives an
> exception.
>
> This is the output I receive:
>
> Zeroing memory at 0x8048d086, size = 0x39f9a
> Starting ELF64 kernel
>
> Exception: <vector=Normal>
> Status register: 0x34010082<CU1,CU0,FR,DE,IPL=8,KX,MODE=KERNEL>
> Cause register: 0x8024<CE=0,IP8,EXC=BREAK>
> Exception PC: 0x8046dc00, Exception RA: 0x80460840
> Breakpoint exception at address 0xffffffff
> Saved user regs in hex (&gpda 0x81061838, &_regs 0x81061a38):
> arg: 81070000 50000 50000 804982f8
> tmp: 81070000 8048f4e8 3 4c8 0 1 804a0000 b000
> sve: 81070000 0 0 0 0 0 0 80ee80d5
> t8 81070000 t9 0 at 0 v0 0 v1 0 k1 0
> gp 81070000 fp 0 sp 0 ra 0
>
> PANIC: Unexpected exception
This looks like the execution runs into a BUG() macro in the kernel
before it can set up the basic exception handlers.
(The guilty caller is the function loaded around the address 0x80460840,
a look at the vmlinux binary with objdump, or even a look at System.map
might tell more.)
Thiemo
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