Changeset 97818 in vbox for trunk/src/VBox/ValidationKit/bootsectors

Timestamp:

Dec 15, 2022 10:46:43 PM (2 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

154898

Message:

bs3kit/Bs3TrapSystemCallHandler: Must save and restore SS around string printing too as mode switches will switch to the default stack.

File:

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

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

@@ -267 +267 @@
 %if TMPL_BITS != 64
         push    es
+        push    ss                      ; Must save and restore SS for supporting 16/32 and 32/16 caller/kernel ring-0 combinations.
 %endif
         ; Convert the incoming pointer to real mode (assuming caller checked
@@ -301 +302 @@
 %endif
 %if TMPL_BITS != 64
+        pop     ss
         pop     es
 %endif