The following patches add experimental support for x86-64 arch. The
code is based on Alexey's submission from a while ago.
The basic case of 64bit process checkpoint/restart works. Other cases
such as 32bit processes checkpoint/restart on 64->64, 32->64 and also
64->32 are not tested. Nor is self-checkpoint.
Being far from an expert on x86-64, I collected bits and pieces from
other places in the kernel - so this needs a serious review, including:
- How load_cpu_regs() restores the task's current state - I tried to
follow similar work done by context switch code
- For self-checkpoint make sure we get the correct "running" state
from current registers (e.g. segments), not from ptregs.
The first patch relocates and splits current x86-32 code. The second
patch adds support for x86-64. The third patch provides the user-cr
eclone() wrapper based on Dave and Louis's work.
Oren.
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