i386 page fault clobbers error code in trap frame

[Tijl Coosemans]

I'm refering to the following two lines in sys/i386/i386/trap.c

/* kludge to pass faulting virtual address to sendsig */
frame->tf_err = eva;

Isn't there some other way to do this? Wouldn't the address still be 
available in %cr2 inside sendsig? Or could there have been other page 
faults by then?

The reason I'm asking this is that Wine wants to know the error code in 
case of a page fault (the No eXec bit (AMD) and the read/write bit 
specifically).
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