Merge r6130:

- AIX implementations of various stuff, nothing surprising.

- For all platforms: make VG_(read) and VG_(write) return (negative)
  actual error values rather than producing -1 for all failures.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6267 a5019735-40e9-0310-863c-91ae7b9d1cf9
3 files changed