diff --git a/scripts/qemugdb/coroutine.py b/scripts/qemugdb/coroutine.py
index db61389022..e1399211e6 100644
--- a/scripts/qemugdb/coroutine.py
+++ b/scripts/qemugdb/coroutine.py
@@ -70,6 +70,11 @@ def bt_jmpbuf(jmpbuf):
     regs = get_jmpbuf_regs(jmpbuf)
     old = dict()
 
+    # remember current stack frame and select the topmost
+    # so that register modifications don't wreck it
+    selected_frame = gdb.selected_frame()
+    gdb.newest_frame().select()
+
     for i in regs:
         old[i] = gdb.parse_and_eval('(uint64_t)$%s' % i)
 
@@ -81,6 +86,8 @@ def bt_jmpbuf(jmpbuf):
     for i in regs:
         gdb.execute('set $%s = %s' % (i, old[i]))
 
+    selected_frame.select()
+
 def coroutine_to_jmpbuf(co):
     coroutine_pointer = co.cast(gdb.lookup_type('CoroutineUContext').pointer())
     return coroutine_pointer['env']['__jmpbuf']