X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-bsd-os.h;h=259bb0155c246f9c9d94100b1e0db01cb14aa4bd;hb=c6b078527eb68acc281dc79c91824c937f9447fe;hp=1340cb49fd4dbcdea7c3fb220191746e63b1a819;hpb=503a50f07740b52908f630b0492cf56556f1a792;p=sbcl.git

diff --git a/src/runtime/x86-bsd-os.h b/src/runtime/x86-bsd-os.h
index 1340cb4..259bb01 100644
--- a/src/runtime/x86-bsd-os.h
+++ b/src/runtime/x86-bsd-os.h
@@ -1,8 +1,22 @@
-#ifndef _X86_LINUX_OS_H
-#define _X86_LINUX_OS_H
+#ifndef _X86_BSD_OS_H
+#define _X86_BSD_OS_H
 
 static inline os_context_t *arch_os_get_context(void **void_context) {
     return (os_context_t *) *void_context;
 }
 
-#endif /* _X86_LINUX_OS_H */
+/* The different BSD variants have diverged in exactly where they
+ * store signal context information, but at least they tend to use the
+ * same stems to name the structure fields, so by using this macro we
+ * can share a fair amount of code between different variants. */
+#if defined __FreeBSD__
+#define CONTEXT_ADDR_FROM_STEM(stem) &context->uc_mcontext.mc_ ## stem
+#elif defined __OpenBSD__
+#define CONTEXT_ADDR_FROM_STEM(stem) &context->sc_ ## stem
+#elif defined __NetBSD__
+#define CONTEXT_ADDR_FROM_STEM(stem) &((context)->uc_mcontext.__gregs[_REG_ ## stem])
+#else
+#error unsupported BSD variant
+#endif
+
+#endif /* _X86_BSD_OS_H */