From: Tim Harris <tharris@microsoft.com>
Date: Mon, 7 Feb 2011 23:16:27 +0000 (-0800)
Subject: X86: Use all 64 bits of the lstar register in the SYSCALL_64 macroop.
X-Git-Tag: stable_2012_02_02~564
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6da83b8a1b06e64a2fc7b14c5ad342188f082848;p=gem5.git

X86: Use all 64 bits of the lstar register in the SYSCALL_64 macroop.

During SYSCALL_64, use dataSize=8 when handling new rip (ref
http://www.intel.com/Assets/PDF/manual/253668.pdf 5.8.8 IA32_LSTAR is a 64-bit
address)
---

diff --git a/src/arch/x86/isa/insts/general_purpose/system_calls.py b/src/arch/x86/isa/insts/general_purpose/system_calls.py
index b015c82fc..d6f1a39bf 100644
--- a/src/arch/x86/isa/insts/general_purpose/system_calls.py
+++ b/src/arch/x86/isa/insts/general_purpose/system_calls.py
@@ -79,8 +79,8 @@ def macroop SYSCALL_64
     wrattr ss, t4
 
     # Set the new rip.
-    rdval t7, lstar
-    wrip t0, t7
+    rdval t7, lstar, dataSize=8
+    wrip t0, t7, dataSize=8
 
     # Mask the flags against sf_mask and leave RF turned off.
     rdval t3, sf_mask, dataSize=8