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
stuff?