commit 90ffbe3cc96002ab396de87fb78930f6059ece82
author sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> Tue Feb 21 08:38:04 2012 +0000
committer sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> Tue Feb 21 08:38:04 2012 +0000
tree 8ae746dcd81cfc37d383afc5a1f3e03fa0d514e3
parent 87a1fa5fd47ba309d196e5c8127bf2d98c8bfa65

x86: don't forget to initialise guest %es from the host %es when
constructing the initial guest register state.  Fixes #291253.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12394 a5019735-40e9-0310-863c-91ae7b9d1cf9

coregrind/m_initimg/initimg-linux.c

diff --git a/coregrind/m_initimg/initimg-linux.c b/coregrind/m_initimg/initimg-linux.c
index eccdd2b..1e1338e 100644
--- a/coregrind/m_initimg/initimg-linux.c
+++ b/coregrind/m_initimg/initimg-linux.c
@@ -986,10 +986,11 @@
    arch->vex.guest_EIP = iifii.initial_client_IP;
 
    /* initialise %cs, %ds and %ss to point at the operating systems
-      default code, data and stack segments */
+      default code, data and stack segments.  Also %es (see #291253). */
    asm volatile("movw %%cs, %0" : : "m" (arch->vex.guest_CS));
    asm volatile("movw %%ds, %0" : : "m" (arch->vex.guest_DS));
    asm volatile("movw %%ss, %0" : : "m" (arch->vex.guest_SS));
+   asm volatile("movw %%es, %0" : : "m" (arch->vex.guest_ES));
 
 #  elif defined(VGP_amd64_linux)
    vg_assert(0 == sizeof(VexGuestAMD64State) % 16);