Just to understand the state of compatibility and rump kernels.

rump_syscalls.h has never had any compatibility syscalls in it, so the
only way you could actually use them was through directly calling
rump___sysimpl_XXX. The only user of that was probably ljsyscall,
mainly by mistake calling the wrong versions. Well technically might
still use it on NetBSD if you have are running current rump on NetBSD
6, as this case is still slightly odd, but there are so few changed
syscalls that it is not really an issue, and I could change this.
There is no way currently to call compat calls from rumprun. There are
no rump based tests of compat calls, only of current ones.

If you wanted to test compat calls, it would probably be much easier
to do it by loading a module like Linux compat does which replaced the
syscalls; then you could test eg with ljsyscall.

Justin

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