From 1924112d7d68f6dcaeeebc20eaf33b25ffb7dd33 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sat, 11 Apr 2020 14:00:20 +0200
Subject: [PATCH] LibX86: Tolerate invalid segment register indices when
 disassembling

While #6 and #7 are not valid segment register, they can still be
encoded in otherwise-valid instructions, so let's tolerate it.
---
 Libraries/LibX86/Instruction.cpp | 4 ++++
 Libraries/LibX86/Instruction.h   | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/Libraries/LibX86/Instruction.cpp b/Libraries/LibX86/Instruction.cpp
index e4ae2367f5..68cca330ea 100644
--- a/Libraries/LibX86/Instruction.cpp
+++ b/Libraries/LibX86/Instruction.cpp
@@ -1760,6 +1760,10 @@ const char* register_name(SegmentRegister index)
         return "fs";
     case SegmentRegister::GS:
         return "gs";
+    case SegmentRegister::SegR6:
+        return "segr6";
+    case SegmentRegister::SegR7:
+        return "segr7";
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
diff --git a/Libraries/LibX86/Instruction.h b/Libraries/LibX86/Instruction.h
index 7e65dbed53..b1bd8098ca 100644
--- a/Libraries/LibX86/Instruction.h
+++ b/Libraries/LibX86/Instruction.h
@@ -88,6 +88,8 @@ enum class SegmentRegister {
     DS,
     FS,
     GS,
+    SegR6,
+    SegR7,
     None = 0xFF,
 };