registry: Add a call for DTRACE compatibility.

dix/registry.c

@@ -217,6 +217,25 @@ LookupRequestName(int major, int minor)
     return requests[major][minor] ? requests[major][minor] : XREGISTRY_UNKNOWN;
 }
 
+const char *
+LookupMajorName(int major)
+{
+    if (major < 128) {
+	const char *retval;
+
+	if (major >= nmajor)
+	    return XREGISTRY_UNKNOWN;
+	if (0 >= nminor[major])
+	    return XREGISTRY_UNKNOWN;
+
+	retval = requests[major][0];
+	return retval ? retval + sizeof(CORE) : XREGISTRY_UNKNOWN;
+    } else {
+	ExtensionEntry *extEntry = GetExtensionEntry(major);
+	return extEntry ? extEntry->name : XREGISTRY_UNKNOWN;
+    }
+}
+
 const char *
 LookupEventName(int event)
 {

hw/xfree86/loader/dixsym.c

@@ -289,6 +289,11 @@ _X_HIDDEN void *dixLookupTab[] = {
     /* registry.c */
 #ifdef XREGISTRY
     SYMFUNC(RegisterResourceName)
+    SYMFUNC(LookupMajorName)
+    SYMFUNC(LookupRequestName)
+    SYMFUNC(LookupEventName)
+    SYMFUNC(LookupErrorName)
+    SYMFUNC(LookupResourceName)
 #endif
     /* swaprep.c */
     SYMFUNC(CopySwap32Write)

include/registry.h

@@ -29,6 +29,7 @@ void RegisterExtensionNames(ExtensionEntry *ext);
 /*
  * Lookup functions.  The returned string must not be modified or freed.
  */
+const char *LookupMajorName(int major);
 const char *LookupRequestName(int major, int minor);
 const char *LookupEventName(int event);
 const char *LookupErrorName(int error);
@@ -51,6 +52,7 @@ void dixResetRegistry(void);
 #define RegisterResourceName(a, b) { ; }
 #define RegisterExtensionNames(a) { ; }
 
+#define LookupMajorName(a) XREGISTRY_UNKNOWN
 #define LookupRequestName(a, b) XREGISTRY_UNKNOWN
 #define LookupEventName(a) XREGISTRY_UNKNOWN
 #define LookupErrorName(a) XREGISTRY_UNKNOWN