Index: /trunk/mod_cacher/xc_cacher.c
===================================================================
--- /trunk/mod_cacher/xc_cacher.c	(revision 1043)
+++ /trunk/mod_cacher/xc_cacher.c	(revision 1045)
@@ -3254,5 +3254,5 @@
 
 	xc_sandbox_module_init(module_number TSRMLS_CC);
-	return xcache_zend_extension_register(&xc_cacher_zend_extension_entry, 0);
+	return xcache_zend_extension_prepend(&xc_cacher_zend_extension_entry);
 
 err_init:
@@ -3264,5 +3264,5 @@
 	xc_sandbox_module_shutdown();
 
-	xcache_zend_extension_unregister(&xc_cacher_zend_extension_entry);
+	xcache_zend_extension_remove(&xc_cacher_zend_extension_entry);
 	UNREGISTER_INI_ENTRIES();
 
Index: /trunk/xcache/xc_extension.c
===================================================================
--- /trunk/xcache/xc_extension.c	(revision 1026)
+++ /trunk/xcache/xc_extension.c	(revision 1045)
@@ -5,5 +5,5 @@
 
 
-int xcache_zend_extension_register(zend_extension *new_extension, zend_bool prepend) /* {{{ */
+int xcache_zend_extension_prepend(zend_extension *new_extension) /* {{{ */
 {
 	zend_extension extension;
@@ -14,11 +14,6 @@
 	zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);
 
-	if (prepend) {
-		zend_llist_prepend_element(&zend_extensions, &extension);
-	}
-	else {
-		zend_llist_add_element(&zend_extensions, &extension);
-	}
-	TRACE("%s", "registered");
+	zend_llist_prepend_element(&zend_extensions, &extension);
+	TRACE("%s", "prepended");
 	return SUCCESS;
 }
@@ -41,5 +36,5 @@
 }
 /* }}} */
-int xcache_zend_extension_unregister(zend_extension *extension) /* {{{ */
+int xcache_zend_extension_remove(zend_extension *extension) /* {{{ */
 {
 	zend_extension *ext = zend_get_extension(extension->name);
@@ -56,16 +51,40 @@
 /* }}} */
 
-zend_llist_element *xcache_llist_get_element_by_zend_extension(zend_llist *l, const char *extension_name) /* {{{ */
+int xcache_zend_extension_count_by_prefix(zend_llist *l, const char *extension_name_prefix) /* {{{ */
 {
 	zend_llist_element *element;
+	size_t n = strlen(extension_name_prefix);
+	int count = 0;
 
 	for (element = zend_extensions.head; element; element = element->next) {
 		zend_extension *extension = (zend_extension *) element->data;
 
-		if (!strcmp(extension->name, extension_name)) {
-			return element;
+		if (strncmp(extension->name, extension_name_prefix, n) == 0) {
+			++count;
 		}
 	}
-	return NULL;
+	return count;
+}
+/* }}} */
+void xcache_zend_extension_unlink_by_prefix(xc_stack_t *linked, zend_llist *l, const char *extension_name_prefix) /* {{{ */
+{
+	size_t n = strlen(extension_name_prefix);
+	zend_llist_element *unlinked = NULL;
+	zend_llist_element *element, *next;
+
+	for (element = zend_extensions.head; element; element = next) {
+		zend_extension *extension = (zend_extension *) element->data;
+		next = element->next;
+
+		if (strncmp(extension->name, extension_name_prefix, n) == 0) {
+			xcache_llist_unlink(l, element);
+			xc_stack_push(linked, element);
+		}
+	}
+
+	for (element = zend_extensions.head; element; element = next) {
+		zend_extension *extension = (zend_extension *) element->data;
+		next = element->next;
+	}
 }
 /* }}} */
Index: /trunk/xcache/xc_extension.h
===================================================================
--- /trunk/xcache/xc_extension.h	(revision 1044)
+++ /trunk/xcache/xc_extension.h	(revision 1045)
@@ -6,9 +6,11 @@
 #endif /* _MSC_VER > 1000 */
 
+#include "util/xc_stack.h"
 #include "zend_extensions.h"
-int xcache_zend_extension_register(zend_extension *new_extension, zend_bool prepend);
-int xcache_zend_extension_unregister(zend_extension *extension);
+int xcache_zend_extension_prepend(zend_extension *new_extension);
+int xcache_zend_extension_remove(zend_extension *extension);
+int xcache_zend_extension_count_by_prefix(zend_llist *l, const char *extension_name_prefix);
+void xcache_zend_extension_unlink_by_prefix(xc_stack_t *unlinked, zend_llist *l, const char *extension_name_prefix);
 
-zend_llist_element *xcache_llist_get_element_by_zend_extension(zend_llist *l, const char *extension_name);
 void xcache_llist_prepend(zend_llist *l, zend_llist_element *element);
 void xcache_llist_unlink(zend_llist *l, zend_llist_element *element);
Index: /trunk/mod_coverager/xc_coverager.c
===================================================================
--- /trunk/mod_coverager/xc_coverager.c	(revision 1043)
+++ /trunk/mod_coverager/xc_coverager.c	(revision 1045)
@@ -671,5 +671,5 @@
 	}
 
-	return xcache_zend_extension_register(&xc_coverager_zend_extension_entry, 0);
+	return xcache_zend_extension_prepend(&xc_coverager_zend_extension_entry);
 }
 /* }}} */
@@ -685,5 +685,5 @@
 	}
 	UNREGISTER_INI_ENTRIES();
-	return xcache_zend_extension_unregister(&xc_coverager_zend_extension_entry);
+	return xcache_zend_extension_remove(&xc_coverager_zend_extension_entry);
 }
 /* }}} */
Index: /trunk/xcache.c
===================================================================
--- /trunk/xcache.c	(revision 1040)
+++ /trunk/xcache.c	(revision 1045)
@@ -39,5 +39,4 @@
 
 static zend_compile_file_t *old_compile_file = NULL;
-static zend_llist_element  *xc_llist_zend_extension = NULL;
 
 zend_bool xc_test = 0;
@@ -544,5 +543,6 @@
 #endif
 
-static startup_func_t xc_last_ext_startup;
+static startup_func_t xc_last_ext_old_startup;
+static xc_stack_t xc_llist_zend_extensions; /* (zend_extension *) */
 static int xc_zend_startup_last_hook(zend_extension *extension) /* {{{ */
 {
@@ -552,5 +552,7 @@
 	}
 	/* restore */
-	extension->startup = xc_last_ext_startup;
+	extension->startup = xc_last_ext_old_startup;
+	extension->startup = xc_last_ext_old_startup;
+	xc_last_ext_old_startup = NULL;
 	if (extension->startup) {
 		if (extension->startup(extension) != SUCCESS) {
@@ -558,6 +560,11 @@
 		}
 	}
-	assert(xc_llist_zend_extension);
-	xcache_llist_prepend(&zend_extensions, xc_llist_zend_extension);
+
+	assert(xc_stack_count(&xc_llist_zend_extensions));
+	while (xc_stack_count(&xc_llist_zend_extensions)) {
+		zend_llist_element *p = (zend_llist_element *) xc_stack_pop(&xc_llist_zend_extensions);
+		xcache_llist_prepend(&zend_extensions, p);
+	}
+	xc_stack_destroy(&xc_llist_zend_extensions);
 	return SUCCESS;
 }
@@ -568,20 +575,20 @@
 	zend_compile_file = xc_check_initial_compile_file;
 
-	if (zend_llist_count(&zend_extensions) > 1) {
+	if (1 || xcache_zend_extension_count_by_prefix(&zend_extensions, XCACHE_NAME) != zend_llist_count(&zend_extensions)) {
 		zend_llist_position lpos;
-		zend_extension *ext;
-
-		xc_llist_zend_extension = xcache_llist_get_element_by_zend_extension(&zend_extensions, XCACHE_NAME);
-		if (xc_llist_zend_extension != zend_extensions.head) {
-			zend_error(E_WARNING, "XCache failed to load itself as the first zend_extension. compatibility downgraded");
-		}
-
-		/* hide myself */
-		/* TODO: hide handle sub modules */
-		xcache_llist_unlink(&zend_extensions, xc_llist_zend_extension);
+		zend_extension *ext = (zend_extension *) zend_extensions.head->data;
+		assert(ext);
+
+		if (strcmp(ext->name, XCACHE_NAME) != 0) {
+			zend_error(E_WARNING, "XCache failed to load itself as the before \"%s\". compatibility downgraded", ext->name);
+		}
+
+		/* hide XCache modules */
+		xc_stack_init(&xc_llist_zend_extensions);
+		xcache_zend_extension_unlink_by_prefix(&xc_llist_zend_extensions, &zend_extensions, XCACHE_NAME);
 
 		ext = (zend_extension *) zend_llist_get_last_ex(&zend_extensions, &lpos);
-		assert(ext && ext != (zend_extension *) xc_llist_zend_extension->data);
-		xc_last_ext_startup = ext->startup;
+		assert(ext);
+		xc_last_ext_old_startup = ext->startup;
 		ext->startup = xc_zend_startup_last_hook;
 	}
@@ -638,7 +645,4 @@
 static PHP_MINIT_FUNCTION(xcache) /* {{{ */
 {
-	/* must be the first */
-	xcache_zend_extension_register(&xc_zend_extension_entry, 1);
-
 #ifndef PHP_GINIT
 	ZEND_INIT_MODULE_GLOBALS(xcache, xc_init_globals, xc_shutdown_globals);
@@ -653,16 +657,20 @@
 	xc_shm_init_modules();
 
+	/* ZendExtension is registered in reverse order for prepend by XCache */
+#ifdef HAVE_XCACHE_COVERAGER
+	xc_coverager_startup_module();
+#endif
+#ifdef HAVE_XCACHE_DISASSEMBLER
+	xc_disassembler_startup_module();
+#endif
+#ifdef HAVE_XCACHE_CACHER
+	xc_cacher_startup_module();
+#endif
 #ifdef HAVE_XCACHE_OPTIMIZER
 	xc_optimizer_startup_module();
 #endif
-#ifdef HAVE_XCACHE_CACHER
-	xc_cacher_startup_module();
-#endif
-#ifdef HAVE_XCACHE_COVERAGER
-	xc_coverager_startup_module();
-#endif
-#ifdef HAVE_XCACHE_DISASSEMBLER
-	xc_disassembler_startup_module();
-#endif
+	/* must be the first */
+	xcache_zend_extension_prepend(&xc_zend_extension_entry);
+
 	return SUCCESS;
 
@@ -694,5 +702,5 @@
 
 	UNREGISTER_INI_ENTRIES();
-	xcache_zend_extension_unregister(&xc_zend_extension_entry);
+	xcache_zend_extension_remove(&xc_zend_extension_entry);
 	return SUCCESS;
 }
Index: /trunk/mod_optimizer/xc_optimizer.c
===================================================================
--- /trunk/mod_optimizer/xc_optimizer.c	(revision 1043)
+++ /trunk/mod_optimizer/xc_optimizer.c	(revision 1045)
@@ -667,5 +667,5 @@
 {
 	REGISTER_INI_ENTRIES();
-	return xcache_zend_extension_register(&xc_optimizer_zend_extension_entry, 0);
+	return xcache_zend_extension_prepend(&xc_optimizer_zend_extension_entry);
 }
 /* }}} */
@@ -673,5 +673,5 @@
 {
 	UNREGISTER_INI_ENTRIES();
-	return xcache_zend_extension_unregister(&xc_optimizer_zend_extension_entry);
+	return xcache_zend_extension_remove(&xc_optimizer_zend_extension_entry);
 }
 /* }}} */