[RFC][PATCH 2/4] checkpoint/restart: x86 support
dave at linux.vnet.ibm.com
Mon Aug 11 08:36:04 PDT 2008
On Sun, 2008-08-10 at 07:55 -0700, Jeremy Fitzhardinge wrote:
> Struct pt_regs is not ABI, and can (and has) changed on x86. It's not
> suitable for a checkpoint structure because it only contains the
> registers that the kernel trashes, not all usermode registers (on i386,
> it leaves out %gs, for example). asm-x86/ptrace-abi.h does define stuff
> that's fixed in stone; it expresses it in terms of a register array,
> with constants defining what element is which register.
Thanks for the explanation.
I just want to reduce the coding and maintenance burden here. Xen must
do this for partition mobility, right? Does it define all its own
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