Changeset 9046 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

May 21, 2008 11:47:23 PM (17 years ago)

Author:

vboxsync

Message:

Experimental workaround for the non-working debuggers and panicing guest - disabled. comment in VBOX_WITH_DR6_EXPERIMENT in order to enable it.

File:

• trunk/src/VBox/VMM/VMMR0/HWACCMR0A.asm (modified) (5 diffs)

trunk/src/VBox/VMM/VMMR0/HWACCMR0A.asm

@@ -45 +45 @@
 %endif
 
+;; This is too risky wrt. stability, performance and correctness.
+;%define VBOX_WITH_DR6_EXPERIMENT 1
 
 ;; @def MYPUSHAD
@@ -228 +230 @@
     sidt    [xSP]
 
+%ifdef VBOX_WITH_DR6_EXPERIMENT
+    ; Restore DR6 - experiment, not safe!
+    mov     xBX, [xSI + CPUMCTX.dr6]
+    mov     dr6, xBX
+%endif
+
     ; Restore CR2
     mov     ebx, [xSI + CPUMCTX.cr2]
@@ -274 +282 @@
 %else
     pop     dword [ss:xDI + CPUMCTX.edi]        ; the guest edi we pushed above
+%endif
+
+%ifdef VBOX_WITH_DR6_EXPERIMENT
+    ; Save DR6 - experiment, not safe!
+    mov     xAX, dr6
+    mov     [ss:xDI + CPUMCTX.dr6], xAX
 %endif
 
@@ -407 +421 @@
     sidt    [xSP]
 
+%ifdef VBOX_WITH_DR6_EXPERIMENT
+    ; Restore DR6 - experiment, not safe!
+    mov     xBX, [xSI + CPUMCTX.dr6]
+    mov     dr6, xBX
+%endif
+
     ; Restore CR2
     mov     xBX, [xSI + CPUMCTX.cr2]
@@ -453 +473 @@
 %else
     pop     dword [ss:xDI + CPUMCTX.edi]        ; the guest edi we pushed above
+%endif
+
+%ifdef VBOX_WITH_DR6_EXPERIMENT
+    ; Save DR6 - experiment, not safe!
+    mov     xAX, dr6
+    mov     [ss:xDI + CPUMCTX.dr6], xAX
 %endif