Changeset 60686 in vbox for trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToLM32.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-SwitchToLM32.asm (modified) (1 diff)

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToLM32.asm

@@ -134 +134 @@
 
         ;
+        ; Load full 64-bit GDT base address from 64-bit segment.
+        ;
+        jmp     dword BS3_SEL_R0_CS64:.load_full_gdt_base wrt FLAT
+.load_full_gdt_base:
+        BS3_SET_BITS 64
+        lgdt    [Bs3Lgdt_Gdt wrt FLAT]
+        push    BS3_SEL_R0_CS32
+        push    .back_to_32bit wrt FLAT
+        o64 retf
+.back_to_32bit:
+        BS3_SET_BITS 32
+
+        ;
         ; Restore ecx, eax and flags (IF).
         ;