[PATCH v3 23/23] xsplice, hello_world: Use the XSPLICE_[UN|]LOAD_HOOK hooks for two functions.

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 xen/arch/x86/test/xen_hello_world.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/xen/arch/x86/test/xen_hello_world.c b/xen/arch/x86/test/xen_hello_world.c
index 6200fbe..b6fa05e 100644
--- a/xen/arch/x86/test/xen_hello_world.c
+++ b/xen/arch/x86/test/xen_hello_world.c
@@ -1,7 +1,9 @@
 #include <xen/config.h>
 #include <xen/types.h>
+#include <xen/xsplice_patch.h>
 #include <xen/xsplice.h>
 #include "config.h"
+#include <xen/lib.h>
 
 static char name[] = "xen_hello_world";
 extern const char *xen_hello_world(void);
@@ -9,6 +11,19 @@ extern const char *xen_hello_world(void);
 /* External symbol. */
 extern const char *xen_extra_version(void);
 
+void apply_hook(void)
+{
+    printk(KERN_DEBUG "Hook executing.\n");
+}
+
+void revert_hook(void)
+{
+    printk(KERN_DEBUG "Hook unloaded.\n");
+}
+
+xsplice_loadcall_t  xsplice_load_data __section(".xsplice.hooks.load") = apply_hook;
+xsplice_unloadcall_t  xsplice_unload_data __section(".xsplice.hooks.unload") = revert_hook;
+
 struct xsplice_patch_func __section(".xsplice.funcs") xsplice_xen_hello_world = {
     .name = name,
     .new_addr = (unsigned long)(xen_hello_world),
-- 
2.1.0