1 files changed, 4 insertions, 0 deletions
diff --git a/swtch.S b/swtch.S
index 786e9ac..8aa4c2e 100644
--- a/swtch.S
+++ b/swtch.S
@@ -16,10 +16,14 @@ swtch:
   movl %esi, 20(%eax)
   movl %edi, 24(%eax)
   movl %ebp, 28(%eax)
+  movl %ss, %ebx
+  movl %ebx, 32(%eax)
 
   # Load new registers
   movl 4(%esp), %eax  # not 8(%esp) - popped return address above
 
+  movl 32(%eax), %ebx
+  movl %ebx, %ss
   movl 28(%eax), %ebp
   movl 24(%eax), %edi
   movl 20(%eax), %esi