Merge r6806 from branches/THRCHECK:

Fix longstanding error in the amd64-linux function-wrapping macros:
protect the caller's red zone across the hidden call.  All rather
nasty as explained in big comment.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7120 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed