winedos / Pass original code and stack pointers to PM DOS relays
Jukka Heinonen
jhei at iki.fi
Mon Aug 18 14:03:06 CDT 2003
This is the first part of FPU emulation fix.
This patch should also make it possible to
simplify raw mode switch code.
Changelog:
When forcing call to DOS relay from protected mode,
make sure that relay sees original stack and code
pointers. Make it possible for DOS relay to modify
code and stack pointers.
Index: dlls/winedos/relay.c
===================================================================
RCS file: /home/wine/wine/dlls/winedos/relay.c,v
retrieving revision 1.2
diff -u -r1.2 relay.c
--- dlls/winedos/relay.c 23 Jun 2003 03:35:51 -0000 1.2
+++ dlls/winedos/relay.c 18 Aug 2003 18:55:13 -0000
@@ -103,12 +103,37 @@
* This stub is called by __wine_call_from_16_regs in order to marshall
* relay parameters.
*/
-static void __stdcall RELAY_RelayStub( DOSRELAY proc,
+static void __stdcall RELAY_RelayStub( DOSRELAY proc,
unsigned char *args,
- void *context )
+ void *ctx86 )
{
if (proc)
- proc( (CONTEXT86*)context, *(LPVOID *)args );
+ {
+ CONTEXT86 *context = (CONTEXT86*)ctx86;
+ RELAY_Stack16 *stack = RELAY_GetPointer( context->Esp );
+
+ DWORD old_seg_cs = context->SegCs;
+ DWORD old_eip = context->Eip;
+ DWORD old_seg_ss = context->SegSs;
+ DWORD old_esp = context->Esp;
+
+ context->SegCs = stack->seg_cs;
+ context->Eip = stack->eip;
+ context->SegSs = stack->seg_ss;
+ context->Esp = stack->esp;
+
+ proc( context, *(LPVOID *)args );
+
+ stack->seg_cs = context->SegCs;
+ stack->eip = context->Eip;
+ stack->seg_ss = context->SegSs;
+ stack->esp = context->Esp;
+
+ context->SegCs = old_seg_cs;
+ context->Eip = old_eip;
+ context->SegSs = old_seg_ss;
+ context->Esp = old_esp;
+ }
}
--
Jukka Heinonen <http://www.iki.fi/jhei/>
More information about the wine-patches
mailing list