Hi,

This patch fixes a bug in ./src/aarch64/sysv.S:ffi_closure_SYSV where 
stack unwinding information was not generated correctly.

OK for the mainline?

Thanks,
Yufeng

2013-12-23  Yufeng Zhang  <yufeng.zhang@arm.com>

	* src/aarch64/sysv.S (ffi_closure_SYSV): Use x29 as the
	main CFA reg; update cfi_rel_offset.