Strange MXCSR messages?
dillon at apollo.backplane.com
Fri Dec 14 11:52:40 PST 2007
::should *NOT* be set to 1. Attempting to set them to 1 will result in a
::general protection exception, which is probably what you're seeing here.
::My guess is, the recent changes to how the signal code in the kernel
::saves and restores the MXCSR register, introduced this bug, and not
::NATA. I'll have a look later at the code in question.
:: Thomas E. Spanjaard
:: tgen at netphreax.net
: Yah, its unrelated to nata. I'll get mysqld built up and try to
: figure out what is messing up the signal stack. firefox and gtk
: have the same problem.
Ok, I figured it out. It's libc_r's thread code. I have to implement
the FP save format field so libc_r uses the correct fxsave or fnsave
libc_r was saving and restoring with fnsave and frstor, and the
kernel is using fxsave and fxrstor.
I'm committing fixes right now. Both the kernel and libc_r must be
<dillon at backplane.com>
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