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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.
oldstable
Jukka Heinonen 2003-08-19 00:59:23 +00:00 committed by Alexandre Julliard
parent e3869d56b7
commit 32e929c0da
1 changed files with 28 additions and 3 deletions
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31
dlls/winedos/relay.c
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@ -103,12 +103,37 @@ static void RELAY_MakeShortContext( CONTEXT86 *context )
* 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;
}
}