[CRIU] [PATCH 4/5] dump: Escape double dumping of mangled vDSO

[Cyrill Gorcunov]

When we dump restored program, if there two vdso present (one -- patched
old vdso and a new one where calls are redirected to) -- we need to skip
dumping second vdso. For what we examinate vdso memory with parasite help
and if special mark present -- we remove such vma from the list.

Moreover, since we can't rely on [vdso] mark came from procfs parsing,
we do parse manually all suitable vDSO areas at dumping stage, and
set/clear VMA_AREA_VDSO status accordingly.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 cr-dump.c                  |  6 ++++
 include/parasite-syscall.h |  3 ++
 include/parasite.h         |  9 ++++++
 parasite-syscall.c         | 75 ++++++++++++++++++++++++++++++++++++++++++++++
 pie/parasite.c             | 36 ++++++++++++++++++++++
 5 files changed, 129 insertions(+)

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