Re: kernel ISI trap on macppc after recent changes

[Matt Thomas <matt%3am-software.com@localhost>]

On Jul 24, 2012, at 2:00 AM, John D. Baker wrote:

> Not long before the kernel version bump to 6.99.10, some changes to
> powerpc architectures result in kernel panic during boot on macppc
> (at least).  First observed in a 6.99.9 kenrel built sometime on
> Saturday, 21 July 2012 (previous kernel built Friday, 20 July worked).
> Observed on PowerBook G4 and Rev. A iMac.

The only changes in powerpc in that time was a new syscall but that
code hasn't even had a chance to be called by the time the panic
happens.

>> From iMac (kernel has DEBUG and DIAGNOSIC enabled):
> [...]
> ohci0 at pci0 dev 20 function 0: Opti 82C861 (rev. 0x10)
> csr: 02800016
> genppc_pci_intr_map: pin: 1, line: 28
> ohci0: interrupting at irq 28
> ohci0: OHCI version 1.0, legacy support
> usb0 at ohci0: USB revision 1.0
> biomask 1f800000 netmask 1f800000 ttymask 1f800000
> trap: kernel ISI by 0xc2e37c00 (SRR1 0x40001032), lr: 0x339a14

This address is in USER_SR.  Are you using modules?

> panic: trap
> Stopped in pid 0.1 (system) at  netbsd:cpu_Debugger+0x10:        lwz     
> r0,0x14(r1)
> 0x0098dbb0: at vpanic+0x21c
> 0x0098dbe0: at panic+0x4c
> 0x0098dc20: at trap+0x100
> 0x0098dcb0: kernel ISI trap by 0xc23e7c00: srr1=0x40001032
>            r1=0x98dd80 cr=0x20009032 xer=0 ctr=0xc23e7c00
> 0x0098dd80: at pic_handle_intr+0x198
> 0x0098ddc0: at trapstart+0x6b0
> 0x0098de90: at cpu_initclocks+0x40
> 0x0098dea0: at initclocks+0x44
> 0x0098deb0: at main+0x258
> 0x0098df10: at 0x1000a0
> db>
> 
> 
> Kernels were built from update build, if it makes a difference.

Sometimes it does.