avoid blx instruction which does not exist on armv4t or armv4

diff --git a/src/thread/arm/clone.s b/src/thread/arm/clone.s
index 127fc0be0fd9731c7ce3a153cfb4e10f62efb1e3..ce372ad335099b8acfce553112d75efff6895ba9 100644 (file)
--- a/src/thread/arm/clone.s
+++ b/src/thread/arm/clone.s
@@ -31,5 +31,6 @@ clone:
        mov r0,#1
        svc 0
 
-1:     blx r5
+1:     mov lr,pc
+       bx r5
        b 2b