Changeset 60686 in vbox for trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToPE32.asm

Timestamp:

Apr 25, 2016 12:51:41 PM (9 years ago)

Author:

vboxsync

Message:

bs3kit: Enabled full gdt base address loading (and testing).

File:

• trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToPE32.asm (modified) (2 diffs)

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToPE32.asm

@@ -87 +87 @@
         ; Load the GDT and enable PE32.
         ;
+BS3_EXTERN_SYSTEM16 Bs3LgdtDef_Gdt
 BS3_EXTERN_SYSTEM16 Bs3Lgdt_Gdt
 BS3_BEGIN_TEXT16
         mov     ax, BS3SYSTEM16
         mov     ds, ax
-        lgdt    [Bs3Lgdt_Gdt]
+        lgdt    [Bs3LgdtDef_Gdt]        ; Will only load 24-bit base!
 
         mov     eax, cr0
@@ -117 +118 @@
         extern  NAME(Bs3EnteredMode_pe32)
         call    NAME(Bs3EnteredMode_pe32)
+
+        ; Load full 32-bit GDT base address.
+        lgdt    [Bs3Lgdt_Gdt wrt FLAT]
 
         ;