[aarch64-port-dev ] Don't use any form of _call_VM_leaf when we're calling a stub

[Edward Nevill]

oops, sorry, I should have done a smoke test on the buitin sim,

Ed.

On Thu, 2014-05-29 at 18:24 +0100, Andrew Haley wrote:
> The CRC32 patch broke the builtin simulator.  It was calling a
> (AArch64 code) stub routine vi blrt, which is really only for runtime
> code.  Fixed thusly.
> 
> Andrew.