__HYPERCALL_ARG4REG  100 arch/x86/include/asm/xen/hypercall.h #define __HYPERCALL_ARG4REG	"esi"
__HYPERCALL_ARG4REG  107 arch/x86/include/asm/xen/hypercall.h #define __HYPERCALL_ARG4REG	"r10"