Oren Laadan wrote:
> Similar to other select syscalls (fork, clone, execve), sys_restart
> needs to access the pt_regs structure, so that it can modify it to
> restore the original state from the time of the checkpoint.
>
> (This is less of an issue for x86-32, however is required for those
> architectures that otherwise save/restore partial state (e.g. not all
> registers) during syscall entry/exit, like x86-64.
>
> This patch prepares to support c/r on x86-64, specifically:
>
> * Changes the syscall prototype and definition to accept the pt_regs
> struct as an argument (into %eax register).
I forgot to mention that this of course breaks s390 and ppc: you
need to provide an arch-dependent sys_restart() similar to how it's
done here.
Oren.
>
> * Move arch/x86/mm/checkpoint*.c to arch/x86/kernel/...
>
> * Split 32bit-dependent part of arch/x86/kernel/checkpoint.c into a
> new arch/x86/kernel/checkpoint_32.c
>
> Signed-off-by: Oren Laadan <[email protected]>
> ---
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