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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-03-20 16:13:41 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-03-20 16:13:41 +0000
commitdc1ded53b8cd9198da193e44b25815cdd2ddb6f5 (patch)
treeaf2ce0f0535819cc1cda8292a685a3b46a146464 /target-i386
parentc522d0e2dee3774884a731691a702126901a1a88 (diff)
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x86: Add NULL check to lsl (Jan Kiszka)
According to the Intel specs, lsl performs a check against NULL for the provided selector, just like lar does. helper_lar() includes the corresponding code, helper_lsl() was lacking it so far. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6863 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/op_helper.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index 25e079b..be09263 100644
--- a/target-i386/op_helper.c
+++ b/target-i386/op_helper.c
@@ -3241,6 +3241,8 @@ target_ulong helper_lsl(target_ulong selector1)
selector = selector1 & 0xffff;
eflags = helper_cc_compute_all(CC_OP);
+ if ((selector & 0xfffc) == 0)
+ goto fail;
if (load_segment(&e1, &e2, selector) != 0)
goto fail;
rpl = selector & 3;