Public bug reported:
http://lkml.org/lkml/2008/3/5/306
The Linux kernel currently does not clear the direction flag before
calling a signal handler, whereas the x86/x86-64 ABI requires that.
This become a real problem with gcc version 4.3, which assumes that
the direction flag is correctly cleared at the entry of a function.
This patches changes the setup_frame() functions to clear the
direction before entering the signal handler.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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[PATCH] x86: Clear DF before calling signal handler
https://bugs.launchpad.net/bugs/199072
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