On Sat, Jun 16, 2012 at 12:22:53AM +0200, Lluis Batlle i Rossell wrote:

Reusing most of the code from lw,ld,sw,sd emulation,
I add the emulation for lwc1,ldc1,swc1,sdc1.

This avoids the direct SIGBUS sent to userspace processes that have
misaligned memory accesses.

I've tested the change in Loongson2F, with an own test program, and
WebKit 1.4.0, as both were killed by sigbus without this patch.

A misaligned FPU access is a strong indication for broken, non-portable
software.  which means you're likely trying to fix the wrong issue.  It's
quite intentional that there is no unaligned handling for the FPU in the
kernel - and afaics there isn't for any other MIPS UNIX.

  Ralf