Hi again!

>I just tried to compile perl58 via pkgsrc on my qube 2 (running
>-current kernel and userland):
>[...]
>  Checking whether your C compiler can cast large floats to int32.
>This last test panics the kernel reproduceablely:
>
>  trap: TLB miss (load or instr. fetch) in kernel mode
>  status=0x20007c03, cause=0x8, epc=0x8019514c, vaddr=0x4

Zoulas> Looks like a NULL pointer (NULL+0x4) dereference bug.

(What does it mean?)

I've extracted perl's Configure C source fragment and recompiled it
explicitly: It's really and only the cast:

  int i32;
  double f, g;
  [...]
  i32  = (int) g;

depending (I didn't write that last time) on the mips specific
compilation optimization: Binaries compiled with anything like
'-mips2' or higher seem to produce the panic:

  gcc -O -s -mips2 -o test-casti32 test-casti32.c

while plain (or '-mips1') binaries seem to run fine.

Is this a (known) limitation of cobalt/mips port/libs?
A bug in gcc?

Anyway, a kernel panic for this kind of user 'stupidity' is not very
kind... ;-)

Sorry for my initially unprecise report,

Markus.