tree ccf58acd47dbf659dca3087b7ebf2704ffd14aba
parent fc9a00187ba1300a0baae8e613cc62598e1a7de7
author Richard Weinberger <richard@nod.at> 1311639174 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1311652633 -0700

um: implement a x86_64 vDSO

Until now UML had no x86_64 vDSO.  So glibc always used the vsyscall page
for gettimeday() and friends.  Calls to gettimeday() returned falsely the
host time and confused some programs.

This patch adds a vDSO which turns all __vdso_* calls into a system call
so that UML can trap them.

As glibc still uses the vsyscall page for static binaries this patch
improves the situation only for dynamic binaries.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>