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 <orenl@xxxxxxxxxxxxxxx> > --- _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
