Greetings!
Im working on a patch to make OpenJDK6 compile and run on m68k.
The missing piece for the implementation is a way to do a atomic cmpxchg
from userspace. If we invent a way of doing that then the missing gcc
atomic builtins:
__sync_val_compare_and_swap_4
__sync_lock_test_and_set_4
__sync_add_and_fetch_4
can be implemented using cmpxchg, this have already been done on the ARM
port using a exisiting kernelhelper for cmpxchg.
I have noticed that there is ongoing work of creating a
__kernel_atomic_cmpxchg_32 helper for m68k using vDSO:
http://lists.debian.org/debian-68k/2007/12/msg00001.html
Someone know the status of this implementation? Is there any kernel
patches ready?
Cheers and have a great day!
Xerxes
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