Strange MXCSR messages?

Matthew Dillon dillon at
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
:    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.
:						-Matt

    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

					Matthew Dillon 
					<dillon at>

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