Changeset 21937 in vbox for trunk/src/VBox/VMM/VMMSwitcher

Timestamp:

Aug 3, 2009 8:50:47 AM (16 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

50605

Message:

Fixed wrong check for sysenter.

File:

• trunk/src/VBox/VMM/VMMSwitcher/AMD64andLegacy.mac (modified) (1 diff)

trunk/src/VBox/VMM/VMMSwitcher/AMD64andLegacy.mac

@@ -256 +256 @@
     FIXUP FIX_NO_SYSENTER_JMP, 0, htg_no_sysenter - NAME(Start) ; this will insert a jmp htg_no_sysenter if host doesn't use sysenter.
     ; save MSR_IA32_SYSENTER_CS register.
+    mov     rbx, rdx                    ; save edx
     mov     ecx, MSR_IA32_SYSENTER_CS
-    mov     rbx, rdx                    ; save edx
     rdmsr                               ; edx:eax <- MSR[ecx]
-    mov     [rbx + r8 + CPUMCPU.Host.SysEnter.cs], rax
-    mov     [rbx + r8 + CPUMCPU.Host.SysEnter.cs + 4], rdx
-    xor     rax, rax                    ; load 0:0 to cause #GP upon sysenter
-    xor     rdx, rdx
+    mov     [rbx + r8 + CPUMCPU.Host.SysEnter.cs], eax
+    mov     [rbx + r8 + CPUMCPU.Host.SysEnter.cs + 4], edx
+    xor     eax, eax                    ; load 0:0 to cause #GP upon sysenter
+    xor     edx, edx
     wrmsr
     mov     rdx, rbx                    ; restore edx