_UC_MACHINE_PAD
#define _UC_MACHINE_PAD 1 /* Padding appended to ucontext_t */
#define _UC_MACHINE_PAD 4 /* Padding appended to ucontext_t */
#define _UC_MACHINE_PAD 14 /* Padding appended to ucontext_t */
#define _UC_MACHINE_PAD 8 /* Padding appended to ucontext_t */
#define _UC_MACHINE_PAD 43 /* Padding appended to ucontext_t */