From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 13 Oct 2008 06:00:07 +0000 (-0700)
Subject: X86: Implement the swapgs instruction.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=564eda827bc9ebe3bacfb9a44838e4abc1deb61b;p=gem5.git

X86: Implement the swapgs instruction.
---

diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
index bceb0595e..b8013165e 100644
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
@@ -128,7 +128,7 @@
                         0x4: smsw_Rv();
                         0x6: lmsw_Rv();
                         0x7: decode MODRM_RM {
-                            0x0: swapgs();
+                            0x0: Inst::SWAPGS();
                             0x1: rdtscp();
                             default: Inst::UD2();
                         }
diff --git a/src/arch/x86/isa/insts/system/segmentation.py b/src/arch/x86/isa/insts/system/segmentation.py
index 97846f79c..49d8eb110 100644
--- a/src/arch/x86/isa/insts/system/segmentation.py
+++ b/src/arch/x86/isa/insts/system/segmentation.py
@@ -167,4 +167,12 @@ def macroop LIDT_16_P
     wrbase idtr, t2
     wrlimit idtr, t1
 };
+
+def macroop SWAPGS
+{
+    rdval t1, kernel_gs_base, dataSize=8
+    rdbase t2, gs, dataSize=8
+    wrbase gs, t1, dataSize=8
+    wrval kernel_gs_base, t2, dataSize=8
+};
 '''