From 39c3fb1b157927058f24b72d43be6f15c1d422b7 Mon Sep 17 00:00:00 2001
From: rsc <rsc>
Date: Thu, 27 Sep 2007 19:39:10 +0000
Subject: overkill: use segments to catch stack overflow (delete before next
 year)

---
 swtch.S | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'swtch.S')

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
-- 
cgit v1.2.3