(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 65 insertions, 4 deletions

diff --git a/elf/soinit.c b/elf/soinit.c
index c0a881e..2015ea2 100644
--- a/elf/soinit.c
+++ b/elf/soinit.c
@@ -6,6 +6,10 @@
 #include <libc-internal.h>
 #include <stdlib.h>
 
+#ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
+# include <gccframe.h>
+#endif
+
 static void (*const __CTOR_LIST__[1]) (void)
      __attribute__ ((section (".ctors")))
      = { (void (*) (void)) -1 };
@@ -20,9 +24,21 @@ run_hooks (void (*const list[]) (void))
     (**list) ();
 }
 
-static const char __EH_FRAME_BEGIN__[]
-  __attribute__ ((used, section (".eh_frame")))
-  = { };
+#ifdef HAVE_DWARF2_UNWIND_INFO
+static char __EH_FRAME_BEGIN__[]
+     __attribute__ ((section (".eh_frame")))
+     = { };
+# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
+extern void __register_frame_info (const void *, struct object *);
+extern void __register_frame_info_bases (const void *, struct object *,
+					 void *, void *);
+extern void __deregister_frame_info (const void *);
+extern void __deregister_frame_info_bases (const void *);
+# else
+extern void __register_frame (const void *);
+extern void __deregister_frame (const void *);
+# endif
+#endif
 
 /* This function will be called from _init in init-first.c.  */
 void
@@ -30,17 +46,62 @@ __libc_global_ctors (void)
 {
   /* Call constructor functions.  */
   run_hooks (__CTOR_LIST__);
+
+#ifdef HAVE_DWARF2_UNWIND_INFO
+# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
+  {
+    static struct object ob;
+#  if defined CRT_GET_RFIB_TEXT || defined CRT_GET_RFIB_DATA
+    void *tbase, *dbase;
+
+#   ifdef CRT_GET_RFIB_TEXT
+    CRT_GET_RFIB_TEXT (tbase);
+#   else
+    tbase = NULL;
+#   endif
+#   ifdef CRT_GET_RFIB_DATA
+    CRT_GET_RFIB_DATA (dbase);
+#   else
+    dbase = NULL;
+#   endif
+    __register_frame_info_bases (__EH_FRAME_BEGIN__, &ob, tbase, dbase);
+#  else
+    __register_frame_info (__EH_FRAME_BEGIN__, &ob);
+#  endif
+  }
+# else
+  __register_frame (__EH_FRAME_BEGIN__);
+# endif
+#endif
 }
 
 
 /* This function becomes the DT_FINI termination function
    for the C library.  */
+#ifndef HAVE_INITFINI_ARRAY
+void _fini (void) __attribute__ ((section (".fini"))); /* Just for kicks.  */
+void
+_fini (void)
+#else
 void
 __libc_fini (void)
+#endif
 {
   /* Call destructor functions.  */
   run_hooks (__DTOR_LIST__);
+#ifdef HAVE_DWARF2_UNWIND_INFO
+# ifdef HAVE_DWARF2_UNWIND_INFO_STATIC
+#  if defined CRT_GET_RFIB_TEXT || defined CRT_GET_RFIB_DATA
+  __deregister_frame_info_bases (__EH_FRAME_BEGIN__);
+#  else
+  __deregister_frame_info (__EH_FRAME_BEGIN__);
+#  endif
+# else
+  __deregister_frame (__EH_FRAME_BEGIN__);
+# endif
+#endif
 }
-
+#ifdef HAVE_INITFINI_ARRAY
 void (*_fini_ptr) (void) __attribute__ ((section (".fini_array")))
      = &__libc_fini;
+#endif