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DOSVM now exports DPMI Raw Mode Switch routine.
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parent
b9627c1486
commit
09537b76f7
2 changed files with 22 additions and 29 deletions
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@ -512,31 +512,23 @@ void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc )
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/* DPMI Raw Mode Switch handler */
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#if 0
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void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context )
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void WINAPI DOSVM_RawModeSwitch( CONTEXT86 *context )
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{
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LPDOSTASK lpDosTask = MZ_Current();
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CONTEXT86 rm_ctx;
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int ret;
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if (!lpDosTask) {
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/* we could probably start a DPMI-only dosmod task here, but I doubt
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anything other than real DOS apps want to call raw mode switch */
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ERR("attempting raw mode switch without DOS task!\n");
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ExitProcess(1);
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}
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/* initialize real-mode context as per spec */
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memset(&rm_ctx, 0, sizeof(rm_ctx));
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rm_ctx.SegDs = AX_sig(context);
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rm_ctx.SegEs = CX_sig(context);
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rm_ctx.SegSs = DX_sig(context);
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rm_ctx.Esp = EBX_sig(context);
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rm_ctx.SegCs = SI_sig(context);
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rm_ctx.Eip = EDI_sig(context);
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rm_ctx.Ebp = EBP_sig(context);
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rm_ctx.SegDs = AX_reg(context);
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rm_ctx.SegEs = CX_reg(context);
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rm_ctx.SegSs = DX_reg(context);
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rm_ctx.Esp = context->Ebx;
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rm_ctx.SegCs = SI_reg(context);
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rm_ctx.Eip = context->Edi;
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rm_ctx.Ebp = context->Ebp;
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rm_ctx.SegFs = 0;
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rm_ctx.SegGs = 0;
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rm_ctx.EFlags = EFL_sig(context); /* at least we need the IF flag */
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rm_ctx.EFlags = context->EFlags; /* at least we need the IF flag */
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/* enter real mode again */
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TRACE("re-entering real mode at %04lx:%04lx\n",rm_ctx.SegCs,rm_ctx.Eip);
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@ -545,26 +537,26 @@ void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context )
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DOSVM_Enter will return and we will continue here */
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if (ret<0) {
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ERR("Sync lost!\n");
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/* if the sync was lost, there's no way to recover */
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ExitProcess(1);
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}
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/* alter protected-mode context as per spec */
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DS_sig(context) = LOWORD(rm_ctx.Eax);
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ES_sig(context) = LOWORD(rm_ctx.Ecx);
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SS_sig(context) = LOWORD(rm_ctx.Edx);
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ESP_sig(context) = rm_ctx.Ebx;
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CS_sig(context) = LOWORD(rm_ctx.Esi);
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EIP_sig(context) = rm_ctx.Edi;
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EBP_sig(context) = rm_ctx.Ebp;
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FS_sig(context) = 0;
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GS_sig(context) = 0;
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context->SegDs = LOWORD(rm_ctx.Eax);
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context->SegEs = LOWORD(rm_ctx.Ecx);
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context->SegSs = LOWORD(rm_ctx.Edx);
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context->Esp = rm_ctx.Ebx;
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context->SegCs = LOWORD(rm_ctx.Esi);
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context->Eip = rm_ctx.Edi;
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context->Ebp = rm_ctx.Ebp;
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context->SegFs = 0;
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context->SegGs = 0;
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/* Return to new address and hope that we didn't mess up */
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TRACE("re-entering protected mode at %04x:%08lx\n",
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CS_sig(context), EIP_sig(context));
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TRACE("re-entering protected mode at %04lx:%08lx\n",
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context->SegCs, context->Eip);
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}
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#endif
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/**********************************************************************
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@ -15,6 +15,7 @@ debug_channels (aspi console ddraw int int21 int31 module relay)
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@ stdcall CallRMProc(ptr long) DOSVM_CallRMProc
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@ stdcall AllocRMCB(ptr) DOSVM_AllocRMCB
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@ stdcall FreeRMCB(ptr) DOSVM_FreeRMCB
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@ stdcall RawModeSwitch(ptr) DOSVM_RawModeSwitch
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# I/O functions
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@ stdcall SetTimer(long) DOSVM_SetTimer
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