hurd: Fix static-PIE startup

hurd initialization stages use RUN_HOOK to run various initialization
functions.  That is however using absolute addresses which need to be
relocated, which is done later by csu.  We can however easily make the
linker compute relative addresses which thus don't need a relocation.
The new SET_RELHOOK and RUN_RELHOOK macros implement this.

1 files changed, 3 insertions, 4 deletions

diff --git a/hurd/hurdsock.c b/hurd/hurdsock.c
index 04e86b4324..116326b2f2 100644
--- a/hurd/hurdsock.c
+++ b/hurd/hurdsock.c
@@ -25,6 +25,7 @@
 #include <_itoa.h>
 #include <lock-intern.h>	/* For `struct mutex'.  */
 #include "hurdmalloc.h"		/* XXX */
+#include "set-hooks.h"
 
 static struct mutex lock;
 
@@ -109,7 +110,7 @@ retry:
   return server;
 }
 
-static void
+static void attribute_used_retain
 init (void)
 {
   int i;
@@ -118,7 +119,5 @@ init (void)
 
   for (i = 0; i < max_domain; ++i)
     servers[i] = MACH_PORT_NULL;
-
-  (void) &init;			/* Avoid "defined but not used" warning.  */
 }
-text_set_element (_hurd_preinit_hook, init);
+SET_RELHOOK (_hurd_preinit_hook, init);