Merge r6123:

Extensions for unwinding stacks on ppc32-aix5 and ppc64-aix5.  Also,
extend the mechanism developed for ppc64-linux for fishing return
addresses out of the thread's redirection-stack when needed.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6261 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed