From 6b46e5204d52c8e46b48541d5112f7e9a1cadc43 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Sun, 12 Oct 2008 20:38:22 -0700
Subject: X86: Implement the chks check of interrupt gate target code segments.

---
 src/arch/x86/isa/microops/regop.isa | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'src/arch/x86/isa/microops/regop.isa')

diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index 0d019729f..ba996060c 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -1076,8 +1076,14 @@ let {{
                     break;
                 }
               case SegIntCSCheck:
-                panic("CS selector checks for interrupts and exceptions"
-                        "not implemented.\\n");
+                if (m5reg.mode == LongMode) {
+                    if (desc.l != 1 || desc.d != 0) {
+                        return new GeneralProtection(selector);
+                    }
+                } else {
+                    panic("Interrupt CS checks not implemented "
+                            "in legacy mode.\\n");
+                }
                 break;
               default:
                 panic("Undefined segment check type.\\n");
-- 
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