Merge pull request #5455 from locicontrols/move-stack

cortexm_common: move the stack to the bottom of RAM

cpu/cortexm_common/ldscripts/cortexm_base.ld

@@ -101,6 +101,16 @@ SECTIONS
     . = ALIGN(4);
     _etext = .;
 
+    /* stack section */
+    .stack (NOLOAD):
+    {
+        . = ALIGN(8);
+        _sstack = .;
+        KEEP (*(.isr_stack))
+        . = ALIGN(8);
+        _estack = .;
+    } > ram
+
     .relocate : AT (_etext)
     {
         . = ALIGN(4);
@@ -124,16 +134,6 @@ SECTIONS
         _ezero = .;
     } > ram
 
-    /* stack section */
-    .stack (NOLOAD):
-    {
-        . = ALIGN(8);
-        _sstack = .;
-        KEEP (*(.isr_stack))
-        . = ALIGN(8);
-        _estack = .;
-    } > ram
-
     /* heap section */
     . = ALIGN(4);
     _sheap = . ;