vbox的更動 60291 路徑 trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToRM.asm

時間撮記:

2016-4-1 下午08:51:29 (9 年 以前)

作者:

vboxsync

訊息:

bs3kit: A bunch of changes to be able to test the effects of a GDT page being read-only or not-present.

• Extended the GDT so we get a whole page to play paging tricks with.
• Added syscall for restoring a context from ring-0 so we can safely get out of bogus test context that aren't in ring-0 (non-standard CS value causing trouble here). Implemented the string print syscall since the restore syscall forced me to sort out pointers.
• Changed most string printers to do more than one char at a time (usually a line) to save context switches (screen priting is done via INT 10h in real mode).
• Test the CS access bit handling during INT XXh.

檔案:

• trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-mode-SwitchToRM.asm (修改) (1 筆差異)

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

@@ -53 +53 @@
 BS3_PROC_BEGIN_MODE Bs3SwitchToRM
 %ifdef TMPL_RM
+        push    ax
+        mov     ax, BS3_SEL_DATA16
+        mov     ds, ax
+        mov     es, ax
+        pop     ax
         ret