Fix build and execution of guile on ia64:

*  Use continuation->backing_store to determine if we return for the first
   time from getcontext(). This avoids having to depend on non-POSIX semantics
   of the Linux implementation.
*  Avoid using __libc_ia64_register_backing_store_base by hardcoding the base
   of the backing store. The kernel is changed to put the backing store at
   this address. It's not entirely clean, but I want to avoid adding all sorts
   of variables in our libc for this for now.
*  Fix a genuine bug in the ia64 case: the ia64-specific fields are not
   initialized. On FreeBSD this means they have garbage (= 0xd0). Call
   memset() after allocation to make sure the contregs structure is properly
   cleared.  Since this may affect other architectures, this patch will be
   ia64 only.

Submitted by:	marcel

0 files changed, 0 insertions, 0 deletions