Three years ago, Mike Frantzen invented StackGhost -- a simple tweak

to the register window spill/fill routines which made buffer overflows
much more difficult to exploit.  This code was integrated (and optimized)
into OpenBSD/sparc, but could not be enabled because the interface changes
affected gdb deeply.  Mike and I (independently) failed to write gdb
support, so StackGhost was left disabled. Until today, two years later..
because Mark Kettenis has written the neccessary code!  Here comes the 1
line diff that enables StackGhost!  Thanks Mark!

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