lkml.org 
[lkml]   [2002]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: FPU precision & signal handlers (bug?)
Date
From
> handlers. We use signals extensively in our program, and were quite
> surprised to find kernel FINIT traps being generated from them. After
> reading through the 2.4.2 source, I now believe that all signal
> handlers run with the default FPU control word in effect. Here's
> why...

Think about MMX and hopefully it makes sense then.

> strikes me as kind of a hack. Why should the signal handler, alone
> among all my functions (excepting main) be responsible for blowing
> away the control word?

Right - I would expect it to be restored at the end of the signal handler
for you - is that occuring or not ? I just want to make sure I understand
the precise details of the problem here.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.240 / U:1.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site