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From: Marko Zec <zec@FreeBSD.org>
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Subject: PERFORCE change 112778 for review
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http://perforce.freebsd.org/chv.cgi?CH=112778

Change 112778 by zec@zec_tca51 on 2007/01/11 18:00:56

	Introduce a macro for resolving pointers to virtualized symbols.
	Introduce the SYSCTL_V_PROC macro, to be used for accessing
	virtualized symbols in handler functions.

Affected files ...

.. //depot/projects/vimage/src/sys/sys/sysctl.h#3 edit

Differences ...

==== //depot/projects/vimage/src/sys/sys/sysctl.h#3 (text+ko) ====

@@ -373,10 +373,36 @@
 	SYSCTL_OID(parent, nbr, name, (access), \
 		ptr, arg, handler, fmt, descr)
 
+#ifdef VIMAGE
+#define SYSCTL_V_PROC(subs, mod, parent, nbr, name, access, sym, arg, \
+		handler, fmt, descr) \
+	SYSCTL_V_OID(subs, mod, parent, nbr, name, (access), \
+		sym, arg, handler, fmt, descr)
+#else
+#define SYSCTL_V_PROC(subs, mod, parent, nbr, name, access, sym, arg, \
+		handler, fmt, descr) \
+	SYSCTL_OID(parent, nbr, name, (access), \
+		&sym, arg, handler, fmt, descr)
+#endif
+
 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
 	sysctl_add_oid(ctx, parent, nbr, name, (access),			    \
 	ptr, arg, handler, fmt, __DESCR(descr))
 
+#ifdef VIMAGE
+#define SYSCTL_RESOLVE_V_ARG1() do {					\
+	void *ptr;							\
+	switch (subs) {							\
+	case V_NET:							\
+		ptr = curthread->td_vimage->v_vnetb->mod_data[mod];	\
+		arg1 = (void *) ((int) ptr + (int) arg1);		\
+		break;							\
+	default:							\
+		panic("unsupported module id %d", subs);		\
+	}								\
+} while (0)
+#endif
+
 #endif /* _KERNEL */
 
 /*