On Tue, Jul 31, 2012 at 03:40:01PM +0200, Ralf Baechle wrote: > 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. Ah, I had no idea it was intentional. Maybe there could be a cleaner declaration of that intention, though. The only code there was "I herewith declare: this does not happen. So send SIGBUS." Thank you, Lluís.
