typedef off_t os_vm_offset_t;
typedef int os_vm_prot_t;
-#if defined __OpenBSD__
-/* name defined for compatibility between OpenBSD 3.1 sigaltstack(2) and
- * Linux sigaltstack(2) */
-typedef struct sigaltstack stack_t;
-#elif defined __FreeBSD__
-/* FreeBSD 4.6 and NetBSD 1.6 already have stack_t defined. */
-#endif
-
#if defined __FreeBSD__
/* Note: The man page for sigaction(2) in FreeBSD 4.0 says that this
* is an mcontext_t, but according to comments by Raymond Wiker in the