[CRIU] [PATCH 2/5] vdso: Introduce vdso engine

[Cyrill Gorcunov]

In this patch we prepare vDSO engine to be used in
future patches. Basically what we need is to:

 - parse runtime vDSO memory
 - patch vDSO area to redirect calls to a new place

Because the vDSO parser will be needed in both parasite and
regular restore code the routine arch_parse_vdso is implemened
as inline helper.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 arch/arm/include/asm/vdso.h |  24 +++++
 arch/x86/Makefile           |   1 +
 arch/x86/crtools.c          |  46 ++++++++++
 arch/x86/include/asm/vdso.h | 208 ++++++++++++++++++++++++++++++++++++++++++++
 arch/x86/vdso.c             |  65 ++++++++++++++
 include/vdso.h              | 116 ++++++++++++++++++++++++
 6 files changed, 460 insertions(+)
 create mode 100644 arch/arm/include/asm/vdso.h
 create mode 100644 arch/x86/include/asm/vdso.h
 create mode 100644 arch/x86/vdso.c
 create mode 100644 include/vdso.h

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