#include <sys/mman.h>
#include <sys/signal.h>
+#ifdef LISP_FEATURE_DARWIN
+#include <mach/mach_types.h>
+#endif
+
typedef caddr_t os_vm_address_t;
+#if defined __NetBSD__
+typedef vsize_t os_vm_size_t;
+#elif defined __OpenBSD__
+typedef size_t os_vm_size_t;
+#else
typedef vm_size_t os_vm_size_t;
+#endif
typedef off_t os_vm_offset_t;
typedef int os_vm_prot_t;
typedef int os_context_register_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
* original FreeBSD port of SBCL, that's wrong, it's actually a
* ucontext_t. */
+#include <sys/ucontext.h>
typedef ucontext_t os_context_t;
-/* As the sbcl-devel message from Raymond Wiker 2000-12-01, FreeBSD
- * (unlike Linux and OpenBSD) doesn't let us tweak the CPU's single
- * step flag bit by messing with the flags stored in a signal context,
- * so we need to implement single stepping in a more roundabout way. */
-#define CANNOT_GET_TO_SINGLE_STEP_FLAG
-#define SIG_MEMORY_FAULT SIGBUS
+#define SIG_MEMORY_FAULT SIGSEGV
+/* Sometime in late 2005 FreeBSD was changed to signal SIGSEGV instead
+ * of SIGBUS for memory faults, as required by POSIX. In order to
+ * support both new and old FreeBSD at the same time, both signals are
+ * hooked to the GC write barrier machinery. If you're reading this
+ * message in the far future where FreeBSD 6 and earlier are just
+ * quaint memories, feel free to delete this hack (and any code that's
+ * #ifdef SIG_MEMORY_FAULT2'ed). -- JES, 2005-12-30
+ */
+#define SIG_MEMORY_FAULT2 SIGBUS
+
#elif defined __OpenBSD__
+
typedef struct sigcontext os_context_t;
#define SIG_MEMORY_FAULT SIGSEGV
+
+#elif defined __NetBSD__
+
+#include <ucontext.h>
+typedef ucontext_t os_context_t;
+#define SIG_MEMORY_FAULT SIGSEGV
+
+#elif defined LISP_FEATURE_DARWIN
+ /* man pages claim that the third argument is a sigcontext struct,
+ but ucontext_t is defined, matches sigcontext where sensible,
+ offers better access to mcontext, and is of course the SUSv2-
+ mandated type of the third argument, so we use that instead.
+ If Apple is going to break ucontext_t out of spite, I'm going
+ to be cross with them ;) -- PRM */
+
+#if defined(LISP_FEATURE_X86)
+#include <sys/ucontext.h>
+#include <sys/_types.h>
+typedef struct ucontext os_context_t;
+#else
+#include <ucontext.h>
+typedef ucontext_t os_context_t;
+#endif
+
+#define SIG_MEMORY_FAULT SIGBUS
+
#else
#error unsupported BSD variant
#endif