Make STI instruction raise an exception

[Jukka Heinonen]

This patch restores exception raising logic to STI instruction.

After this patch, fixing DPMI event handling requires that
return path in call16_handler and entry path in K32WOWCallback16Ex
make the application jump into short assembler code block that 
executes STI if both teb->dpmi_vif and teb->vm86_pending are set.




Changelog:
  Emulating STI instruction now raises an exception if there are pending events.




Index: dlls/kernel/instr.c
===================================================================
RCS file: /home/wine/wine/dlls/kernel/instr.c,v
retrieving revision 1.12
diff -u -r1.12 instr.c
--- dlls/kernel/instr.c	17 Feb 2004 22:46:06 -0000	1.12
+++ dlls/kernel/instr.c	14 Mar 2004 10:08:47 -0000
@@ -822,6 +822,11 @@
         case 0xfb: /* sti */
             NtCurrentTeb()->dpmi_vif = 1;
             context->Eip += prefixlen + 1;
+            if (NtCurrentTeb()->vm86_pending)
+            {
+                rec->ExceptionCode = EXCEPTION_VM86_STI;
+                break; /* Handle the pending event. */
+            }
             return ExceptionContinueExecution;
     }
     return ExceptionContinueSearch;  /* Unable to emulate it */



-- 
Jukka Heinonen <http://www.iki.fi/jhei>