X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=libgc%2Fmark_rts.c;h=561333ab04d672ca249142e11a2b77654adbee38;hb=HEAD;hp=4074879a71aa90d1f8e638b9ce7521573939bfb4;hpb=f84f760a1c8a8c0ec6ae16b7f38d14a49d329ad7;p=mono.git

diff --git a/libgc/mark_rts.c b/libgc/mark_rts.c
index 4074879a71a..561333ab04d 100644
--- a/libgc/mark_rts.c
+++ b/libgc/mark_rts.c
@@ -368,6 +368,9 @@ ptr_t p;
 
 ptr_t GC_approx_sp()
 {
+#if defined(__GNUC__)
+    return __builtin_frame_address(0);
+#else
     VOLATILE word dummy;
 
     dummy = 42;	/* Force stack to grow if necessary.	Otherwise the	*/
@@ -380,6 +383,7 @@ ptr_t GC_approx_sp()
 #   ifdef _MSC_VER
 #     pragma warning(default:4172)
 #   endif
+#endif  // __GNUC__
 }
 
 /*