Changeset 39995 in vbox for trunk/src/VBox

Timestamp:

Feb 4, 2012 1:47:46 PM (13 years ago)

Author:

vboxsync

Message:

tstX86-1: fxsave (on intel) will #PF before writing anything. very nice.

Location:

trunk/src/VBox/VMM/testcase

Files:

• tstX86-1.cpp (modified) (1 diff)
• tstX86-1A.asm (modified) (3 diffs)

trunk/src/VBox/VMM/testcase/tstX86-1.cpp

@@ -5 +5 @@
 
 /*
- * Copyright (C) 2011 Oracle Corporation
+ * Copyright (C) 2011-2012 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as

trunk/src/VBox/VMM/testcase/tstX86-1A.asm

@@ -5 +5 @@
 
 ;
-; Copyright (C) 2011 Oracle Corporation
+; Copyright (C) 2011-2012 Oracle Corporation
 ;
 ; This file is part of VirtualBox Open Source Edition (OSE), as
@@ -1010 +1010 @@
 BEGINPROC   x861_Test3
         SAVE_ALL_PROLOGUE
-
+%if 0
         call    x861_LoadUniqueRegValuesSSE
         mov     xDI, REF_GLOBAL(g_pbEfExecPage)
@@ -1141 +1141 @@
         ShouldTrap X86_XCPT_GP, fxrstor [xDI + 14]
         ShouldTrap X86_XCPT_GP, fxrstor [xDI + 15]
+%endif
+
+        ; Lets check what a FP in fxsave changes ... nothing on intel.
+        mov     ebx, 16
+.fxsave_pf_effect_loop:
+        mov     xDI, REF_GLOBAL(g_pbEfExecPage)
+        add     xDI, PAGE_SIZE - 512 * 2
+        mov     xSI, xDI
+        mov     eax, 066778899h
+        mov     ecx, 512 * 2 / 4
+        cld
+        rep stosd
+
+        ShouldTrap X86_XCPT_PF, fxsave  [xSI + PAGE_SIZE - 512 + xBX]
+
+        mov     ecx, 512 / 4
+        lea     xDI, [xSI + 512]
+        repz cmpsd
+        mov     eax, ebx
+        jnz     .return
+
+        add     ebx, 16
+        cmp     ebx, 512
+        jb      .fxsave_pf_effect_loop