Changeset 66199 in vbox

Timestamp:

Mar 22, 2017 2:24:38 PM (8 years ago)

Author:

vboxsync

Message:

bs3-cmn-RegCtxSaveEx.asm: Do xSP subtraction on the whole register in 32-bit and 64-bit mode, not just SP.

File:

• trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxSaveEx.asm (modified) (1 diff)

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxSaveEx.asm

@@ -111 +111 @@
         ; are saving a 64-bit context.
         ;
-        mov     ax, [xBP + xCB + cbCurRetAddr + sCB + xCB]
+TONLY16 mov     ax, [xBP + xCB + cbCurRetAddr + sCB + xCB]
+TNOT16  movzx   eax, word [xBP + xCB + cbCurRetAddr + sCB + xCB]
 %ifdef BS3_STRICT
-        cmp     ax, 4096
+        cmp     xAX, 4096
         jb      .extra_stack_ok
         call    Bs3Panic
 .extra_stack_ok:
 %endif
-        cmp     ax, 20h
+        cmp     xAX, 20h
         jae     .at_least_20h_extra_stack
-        add     ax, 20h
+        add     xAX, 20h
 .at_least_20h_extra_stack:
-        sub     sp, ax
+        sub     xSP, xAX
 
         ;