/* * DPMI 0.9 emulation * * Copyright 1995 Alexandre Julliard */ #include #include #include "config.h" #include "windef.h" #include "wine/winbase16.h" #include "wine/port.h" #include "builtin16.h" #include "miscemu.h" #include "msdos.h" #include "dosexe.h" #include "task.h" #include "toolhelp.h" #include "selectors.h" #include "callback.h" #include "debugtools.h" DEFAULT_DEBUG_CHANNEL(int31); #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive()) void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */ static void* lastvalloced = NULL; /* Structure for real-mode callbacks */ typedef struct { DWORD edi; DWORD esi; DWORD ebp; DWORD reserved; DWORD ebx; DWORD edx; DWORD ecx; DWORD eax; WORD fl; WORD es; WORD ds; WORD fs; WORD gs; WORD ip; WORD cs; WORD sp; WORD ss; } REALMODECALL; typedef struct tagRMCB { DWORD address; DWORD proc_ofs,proc_sel; DWORD regs_ofs,regs_sel; struct tagRMCB *next; } RMCB; static RMCB *FirstRMCB = NULL; static LPDOSTASK WINAPI DPMI_NoCurrent(void) { return NULL; } DOSVM_TABLE Dosvm = { DPMI_NoCurrent }; static HMODULE DosModule; /********************************************************************** * DPMI_LoadDosSystem */ BOOL DPMI_LoadDosSystem(void) { if (DosModule) return TRUE; DosModule = LoadLibraryA( "winedos.dll" ); if (!DosModule) { ERR("could not load winedos.dll, DOS subsystem unavailable\n"); return FALSE; } Dosvm.Current = (void *)GetProcAddress(DosModule, "GetCurrent"); Dosvm.LoadDPMI = (void *)GetProcAddress(DosModule, "LoadDPMI"); Dosvm.LoadDosExe = (void *)GetProcAddress(DosModule, "LoadDosExe"); Dosvm.Exec = (void *)GetProcAddress(DosModule, "Exec"); Dosvm.Exit = (void *)GetProcAddress(DosModule, "Exit"); Dosvm.Enter = (void *)GetProcAddress(DosModule, "Enter"); Dosvm.Wait = (void *)GetProcAddress(DosModule, "Wait"); Dosvm.QueueEvent = (void *)GetProcAddress(DosModule, "QueueEvent"); Dosvm.OutPIC = (void *)GetProcAddress(DosModule, "OutPIC"); Dosvm.SetTimer = (void *)GetProcAddress(DosModule, "SetTimer"); Dosvm.GetTimer = (void *)GetProcAddress(DosModule, "GetTimer"); return TRUE; } /********************************************************************** * DPMI_xalloc * special virtualalloc, allocates lineary monoton growing memory. * (the usual VirtualAlloc does not satisfy that restriction) */ static LPVOID DPMI_xalloc(int len) { LPVOID ret; LPVOID oldlastv = lastvalloced; if (lastvalloced) { int xflag = 0; ret = NULL; while (!ret) { ret=VirtualAlloc(lastvalloced,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE); if (!ret) lastvalloced = (char *) lastvalloced + 0x10000; /* we failed to allocate one in the first round. * try non-linear */ if (!xflag && (lastvalloced= oldlastv)) xflag++; if ((xflag==2) && (lastvalloced < oldlastv)) { FIXME("failed to allocate any memory of %d bytes!\n",len); return NULL; } } } else ret=VirtualAlloc(NULL,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE); lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff); return ret; } static void DPMI_xfree(LPVOID ptr) { VirtualFree(ptr,0,MEM_RELEASE); } /* FIXME: perhaps we could grow this mapped area... */ static LPVOID DPMI_xrealloc(LPVOID ptr,DWORD newsize) { MEMORY_BASIC_INFORMATION mbi; LPVOID newptr; newptr = DPMI_xalloc(newsize); if (ptr) { if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) { FIXME("realloc of DPMI_xallocd region %p?\n",ptr); return NULL; } if (mbi.State == MEM_FREE) { FIXME("realloc of DPMI_xallocd region %p?\n",ptr); return NULL; } /* We do not shrink allocated memory. most reallocs * only do grows anyway */ if (newsize<=mbi.RegionSize) return ptr; memcpy(newptr,ptr,mbi.RegionSize); DPMI_xfree(ptr); } return newptr; } /********************************************************************** * INT_GetRealModeContext */ static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT86 *context ) { context->Eax = call->eax; context->Ebx = call->ebx; context->Ecx = call->ecx; context->Edx = call->edx; context->Esi = call->esi; context->Edi = call->edi; context->Ebp = call->ebp; context->EFlags = call->fl | V86_FLAG; context->Eip = call->ip; context->Esp = call->sp; context->SegCs = call->cs; context->SegDs = call->ds; context->SegEs = call->es; context->SegFs = call->fs; context->SegGs = call->gs; context->SegSs = call->ss; } /********************************************************************** * INT_SetRealModeContext */ static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT86 *context ) { call->eax = context->Eax; call->ebx = context->Ebx; call->ecx = context->Ecx; call->edx = context->Edx; call->esi = context->Esi; call->edi = context->Edi; call->ebp = context->Ebp; call->fl = LOWORD(context->EFlags); call->ip = LOWORD(context->Eip); call->sp = LOWORD(context->Esp); call->cs = context->SegCs; call->ds = context->SegDs; call->es = context->SegEs; call->fs = context->SegFs; call->gs = context->SegGs; call->ss = context->SegSs; } #ifdef __i386__ void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi) #if 0 /* original code, which early gccs puke on */ { int _clobber; __asm__ __volatile__( "pushl %%ebp\n" "pushl %%ebx\n" "pushl %%es\n" "pushl %%ds\n" "pushfl\n" "mov %7,%%es\n" "mov %5,%%ds\n" ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */ "popl %%ds\n" "mov %%es,%0\n" "popl %%es\n" "popl %%ebx\n" "popl %%ebp\n" : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber) : "0" (ss), "2" (esp), "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs), "3" (&rmcb->proc_ofs) ); } #else /* code generated by a gcc new enough */ ; __ASM_GLOBAL_FUNC(DPMI_CallRMCB32, "pushl %ebp\n\t" "movl %esp,%ebp\n\t" "pushl %edi\n\t" "pushl %esi\n\t" "movl 0x8(%ebp),%eax\n\t" "movl 0x10(%ebp),%esi\n\t" "movl 0xc(%ebp),%edx\n\t" "movl 0x10(%eax),%ecx\n\t" "movl 0xc(%eax),%edi\n\t" "addl $0x4,%eax\n\t" "pushl %ebp\n\t" "pushl %ebx\n\t" "pushl %es\n\t" "pushl %ds\n\t" "pushfl\n\t" "mov %cx,%es\n\t" "mov %dx,%ds\n\t" ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */ "popl %ds\n\t" "mov %es,%dx\n\t" "popl %es\n\t" "popl %ebx\n\t" "popl %ebp\n\t" "movl 0x14(%ebp),%eax\n\t" "movw %dx,(%eax)\n\t" "movl 0x18(%ebp),%edx\n\t" "movl %edi,(%edx)\n\t" "popl %esi\n\t" "popl %edi\n\t" "leave\n\t" "ret") #endif #endif /* __i386__ */ /********************************************************************** * DPMI_CallRMCBProc * * This routine does the hard work of calling a callback procedure. */ static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag ) { if (IS_SELECTOR_SYSTEM( rmcb->proc_sel )) { /* Wine-internal RMCB, call directly */ ((RMCBPROC)rmcb->proc_ofs)(context); } else { #ifdef __i386__ UINT16 ss,es; DWORD esp,edi; INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context); ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, WINE_LDT_FLAGS_DATA ); esp = context->Esp; FIXME("untested!\n"); /* The called proc ends with an IRET, and takes these parameters: * DS:ESI = pointer to real-mode SS:SP * ES:EDI = pointer to real-mode call structure * It returns: * ES:EDI = pointer to real-mode call structure (may be a copy) * It is the proc's responsibility to change the return CS:IP in the * real-mode call structure. */ if (flag & 1) { /* 32-bit DPMI client */ DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi); } else { /* 16-bit DPMI client */ CONTEXT86 ctx = *context; ctx.SegCs = rmcb->proc_sel; ctx.Eip = rmcb->proc_ofs; ctx.SegDs = ss; ctx.Esi = esp; ctx.SegEs = rmcb->regs_sel; ctx.Edi = rmcb->regs_ofs; /* FIXME: I'm pretty sure this isn't right - should push flags first */ wine_call_to_16_regs_short(&ctx, 0); es = ctx.SegEs; edi = ctx.Edi; } FreeSelector16(ss); INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context); #else ERR("RMCBs only implemented for i386\n"); #endif } } /********************************************************************** * DPMI_CallRMProc * * This routine does the hard work of calling a real mode procedure. */ int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret ) { LPWORD stack16; LPVOID addr = NULL; /* avoid gcc warning */ LPDOSTASK lpDosTask = Dosvm.Current(); RMCB *CurrRMCB; int alloc = 0, already = 0; BYTE *code; TRACE("EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx ); TRACE("ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n", context->Esi, context->Edi, context->SegEs, context->SegDs, context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" ); callrmproc_again: /* there might be some code that just jumps to RMCBs or the like, in which case following the jumps here might get us to a shortcut */ code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip); switch (*code) { case 0xe9: /* JMP NEAR */ context->Eip += 3 + *(WORD *)(code+1); /* yeah, I know these gotos don't look good... */ goto callrmproc_again; case 0xea: /* JMP FAR */ context->Eip = *(WORD *)(code+1); context->SegCs = *(WORD *)(code+3); /* ...but since the label is there anyway... */ goto callrmproc_again; case 0xeb: /* JMP SHORT */ context->Eip += 2 + *(signed char *)(code+1); /* ...because of other gotos below, so... */ goto callrmproc_again; } /* shortcut for chaining to internal interrupt handlers */ if ((context->SegCs == 0xF000) && iret) { return INT_RealModeInterrupt( LOWORD(context->Eip)/4, context); } /* shortcut for RMCBs */ CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs)) CurrRMCB = CurrRMCB->next; if (!(CurrRMCB || lpDosTask)) { FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n"); TRACE("creating VM86 task\n"); if ((!DPMI_LoadDosSystem()) || !(lpDosTask = Dosvm.LoadDPMI() )) { ERR("could not setup VM86 task\n"); return 1; } } if (!already) { if (!context->SegSs) { alloc = 1; /* allocate default stack */ stack16 = addr = DOSMEM_GetBlock( 64, (UINT16 *)&(context->SegSs) ); context->Esp = 64-2; stack16 += 32-1; if (!addr) { ERR("could not allocate default stack\n"); return 1; } } else { stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp); } context->Esp -= (args + (iret?1:0)) * sizeof(WORD); stack16 -= args; if (args) memcpy(stack16, stack, args*sizeof(WORD) ); /* push flags if iret */ if (iret) { stack16--; args++; *stack16 = LOWORD(context->EFlags); } /* push return address (return to interrupt wrapper) */ *(--stack16) = DOSMEM_wrap_seg; *(--stack16) = 0; /* adjust stack */ context->Esp -= 2*sizeof(WORD); already = 1; } if (CurrRMCB) { /* RMCB call, invoke protected-mode handler directly */ DPMI_CallRMCBProc(context, CurrRMCB, lpDosTask ? lpDosTask->dpmi_flag : 0); /* check if we returned to where we thought we would */ if ((context->SegCs != DOSMEM_wrap_seg) || (LOWORD(context->Eip) != 0)) { /* we need to continue at different address in real-mode space, so we need to set it all up for real mode again */ goto callrmproc_again; } } else { TRACE("entering real mode...\n"); Dosvm.Enter( context ); TRACE("returned from real-mode call\n"); } if (alloc) DOSMEM_FreeBlock( addr ); return 0; } /********************************************************************** * CallRMInt */ static void CallRMInt( CONTEXT86 *context ) { CONTEXT86 realmode_ctx; FARPROC16 rm_int = INT_GetRMHandler( BL_reg(context) ); REALMODECALL *call = MapSL( MAKESEGPTR( context->SegEs, DI_reg(context) )); INT_GetRealModeContext( call, &realmode_ctx ); /* we need to check if a real-mode program has hooked the interrupt */ if (HIWORD(rm_int)!=0xF000) { /* yup, which means we need to switch to real mode... */ realmode_ctx.SegCs = HIWORD(rm_int); realmode_ctx.Eip = LOWORD(rm_int); if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE)) SET_CFLAG(context); } else { RESET_CFLAG(context); /* use the IP we have instead of BL_reg, in case some apps decide to move interrupts around for whatever reason... */ if (INT_RealModeInterrupt( LOWORD(rm_int)/4, &realmode_ctx )) SET_CFLAG(context); if (context->EFlags & 1) { FIXME("%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", BL_reg(context), realmode_ctx.Eax, realmode_ctx.Ebx, realmode_ctx.Ecx, realmode_ctx.Edx); FIXME(" ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n", realmode_ctx.Esi, realmode_ctx.Edi, realmode_ctx.SegDs, realmode_ctx.SegEs ); } } INT_SetRealModeContext( call, &realmode_ctx ); } static void CallRMProc( CONTEXT86 *context, int iret ) { REALMODECALL *p = MapSL( MAKESEGPTR( context->SegEs, DI_reg(context) )); CONTEXT86 context16; TRACE("RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); TRACE(" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" ); if (!(p->cs) && !(p->ip)) { /* remove this check if Int21/6501 case map function has been implemented */ SET_CFLAG(context); return; } INT_GetRealModeContext(p, &context16); DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3, CX_reg(context), iret ); INT_SetRealModeContext(p, &context16); } static RMCB *DPMI_AllocRMCB( void ) { RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB)); UINT16 uParagraph; if (NewRMCB) { LPVOID RMCBmem = DOSMEM_GetBlock(4, &uParagraph); LPBYTE p = RMCBmem; *p++ = 0xcd; /* RMCB: */ *p++ = 0x31; /* int $0x31 */ /* it is the called procedure's task to change the return CS:EIP the DPMI 0.9 spec states that if it doesn't, it will be called again */ *p++ = 0xeb; *p++ = 0xfc; /* jmp RMCB */ NewRMCB->address = MAKELONG(0, uParagraph); NewRMCB->next = FirstRMCB; FirstRMCB = NewRMCB; } return NewRMCB; } static void AllocRMCB( CONTEXT86 *context ) { RMCB *NewRMCB = DPMI_AllocRMCB(); TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) ); if (NewRMCB) { /* FIXME: if 32-bit DPMI client, use ESI and EDI */ NewRMCB->proc_ofs = LOWORD(context->Esi); NewRMCB->proc_sel = context->SegDs; NewRMCB->regs_ofs = LOWORD(context->Edi); NewRMCB->regs_sel = context->SegEs; SET_LOWORD( context->Ecx, HIWORD(NewRMCB->address) ); SET_LOWORD( context->Edx, LOWORD(NewRMCB->address) ); } else { SET_LOWORD( context->Eax, 0x8015 ); /* callback unavailable */ SET_CFLAG(context); } } FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc ) { RMCB *NewRMCB = DPMI_AllocRMCB(); if (NewRMCB) { NewRMCB->proc_ofs = (DWORD)proc; NewRMCB->proc_sel = 0; NewRMCB->regs_ofs = 0; NewRMCB->regs_sel = 0; return (FARPROC16)(NewRMCB->address); } return NULL; } static int DPMI_FreeRMCB( DWORD address ) { RMCB *CurrRMCB = FirstRMCB; RMCB *PrevRMCB = NULL; while (CurrRMCB && (CurrRMCB->address != address)) { PrevRMCB = CurrRMCB; CurrRMCB = CurrRMCB->next; } if (CurrRMCB) { if (PrevRMCB) PrevRMCB->next = CurrRMCB->next; else FirstRMCB = CurrRMCB->next; DOSMEM_FreeBlock(DOSMEM_MapRealToLinear(CurrRMCB->address)); HeapFree(GetProcessHeap(), 0, CurrRMCB); return 0; } return 1; } static void FreeRMCB( CONTEXT86 *context ) { FIXME("callback address: %04x:%04x\n", CX_reg(context), DX_reg(context)); if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) { SET_LOWORD( context->Eax, 0x8024 ); /* invalid callback address */ SET_CFLAG(context); } } void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc ) { DPMI_FreeRMCB( (DWORD)proc ); } /* (see dosmem.c, function DOSMEM_InitDPMI) */ static void StartPM( CONTEXT86 *context, LPDOSTASK lpDosTask ) { UINT16 cs, ss, ds, es; CONTEXT86 pm_ctx; DWORD psp_ofs = (DWORD)(lpDosTask->psp_seg<<4); PDB16 *psp = (PDB16 *)psp_ofs; HANDLE16 env_seg = psp->environment; unsigned char selflags = WINE_LDT_FLAGS_DATA; RESET_CFLAG(context); lpDosTask->dpmi_flag = AX_reg(context); /* our mode switch wrapper have placed the desired CS into DX */ cs = SELECTOR_AllocBlock( (void *)(DX_reg(context)<<4), 0x10000, WINE_LDT_FLAGS_CODE ); /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing 32-bit code using this stack. */ if (lpDosTask->dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT; ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, selflags ); /* do the same for the data segments, just in case */ if (context->SegDs == context->SegSs) ds = ss; else ds = SELECTOR_AllocBlock( (void *)(context->SegDs<<4), 0x10000, selflags ); es = SELECTOR_AllocBlock( psp, 0x100, selflags ); /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */ psp->environment = SELECTOR_AllocBlock( (void *)(env_seg<<4), 0x10000, WINE_LDT_FLAGS_DATA ); pm_ctx = *context; pm_ctx.SegCs = DOSMEM_dpmi_sel; /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */ pm_ctx.Eax = ss; pm_ctx.Edx = cs; pm_ctx.SegDs = ds; pm_ctx.SegEs = es; pm_ctx.SegFs = 0; pm_ctx.SegGs = 0; TRACE("DOS program is now entering protected mode\n"); wine_call_to_16_regs_short(&pm_ctx, 0); /* in the current state of affairs, we won't ever actually return here... */ /* we should have int21/ah=4c do it someday, though... */ FreeSelector16(psp->environment); psp->environment = env_seg; FreeSelector16(es); if (ds != ss) FreeSelector16(ds); FreeSelector16(ss); FreeSelector16(cs); } /* DPMI Raw Mode Switch handler */ #if 0 void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context ) { LPDOSTASK lpDosTask = Dosvm.Current(); CONTEXT86 rm_ctx; int ret; if (!lpDosTask) { /* we could probably start a DPMI-only dosmod task here, but I doubt anything other than real DOS apps want to call raw mode switch */ ERR("attempting raw mode switch without DOS task!\n"); ExitProcess(1); } /* initialize real-mode context as per spec */ memset(&rm_ctx, 0, sizeof(rm_ctx)); rm_ctx.SegDs = AX_sig(context); rm_ctx.SegEs = CX_sig(context); rm_ctx.SegSs = DX_sig(context); rm_ctx.Esp = EBX_sig(context); rm_ctx.SegCs = SI_sig(context); rm_ctx.Eip = EDI_sig(context); rm_ctx.Ebp = EBP_sig(context); rm_ctx.SegFs = 0; rm_ctx.SegGs = 0; rm_ctx.EFlags = EFL_sig(context); /* at least we need the IF flag */ /* enter real mode again */ TRACE("re-entering real mode at %04lx:%04lx\n",rm_ctx.SegCs,rm_ctx.Eip); ret = Dosvm.Enter( &rm_ctx ); /* when the real-mode stuff call its mode switch address, Dosvm.Enter will return and we will continue here */ if (ret<0) { /* if the sync was lost, there's no way to recover */ ExitProcess(1); } /* alter protected-mode context as per spec */ DS_sig(context) = LOWORD(rm_ctx.Eax); ES_sig(context) = LOWORD(rm_ctx.Ecx); SS_sig(context) = LOWORD(rm_ctx.Edx); ESP_sig(context) = rm_ctx.Ebx; CS_sig(context) = LOWORD(rm_ctx.Esi); EIP_sig(context) = rm_ctx.Edi; EBP_sig(context) = rm_ctx.Ebp; FS_sig(context) = 0; GS_sig(context) = 0; /* Return to new address and hope that we didn't mess up */ TRACE("re-entering protected mode at %04x:%08lx\n", CS_sig(context), EIP_sig(context)); } #endif /********************************************************************** * INT_Int31Handler (WPROCS.149) * * Handler for int 31h (DPMI). */ void WINAPI INT_Int31Handler( CONTEXT86 *context ) { /* * Note: For Win32s processes, the whole linear address space is * shifted by 0x10000 relative to the OS linear address space. * See the comment in msdos/vxd.c. */ DWORD dw; BYTE *ptr; LPDOSTASK lpDosTask = Dosvm.Current(); if (ISV86(context) && lpDosTask) { /* Called from real mode, check if it's our wrapper */ TRACE("called from real mode\n"); if (context->SegCs==DOSMEM_dpmi_seg) { /* This is the protected mode switch */ StartPM(context,lpDosTask); return; } else if (context->SegCs==DOSMEM_xms_seg) { /* This is the XMS driver entry point */ XMS_Handler(context); return; } else { /* Check for RMCB */ RMCB *CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs)) CurrRMCB = CurrRMCB->next; if (CurrRMCB) { /* RMCB call, propagate to protected-mode handler */ DPMI_CallRMCBProc(context, CurrRMCB, lpDosTask->dpmi_flag); return; } } } RESET_CFLAG(context); switch(AX_reg(context)) { case 0x0000: /* Allocate LDT descriptors */ TRACE("allocate LDT descriptors (%d)\n",CX_reg(context)); if (!(context->Eax = AllocSelectorArray16( CX_reg(context) ))) { TRACE("failed\n"); context->Eax = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } TRACE("success, array starts at 0x%04x\n",AX_reg(context)); break; case 0x0001: /* Free LDT descriptor */ TRACE("free LDT descriptor (0x%04x)\n",BX_reg(context)); if (FreeSelector16( BX_reg(context) )) { context->Eax = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { /* If a segment register contains the selector being freed, */ /* set it to zero. */ if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0; if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0; if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0; if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0; } break; case 0x0002: /* Real mode segment to descriptor */ TRACE("real mode segment to descriptor (0x%04x)\n",BX_reg(context)); { WORD entryPoint = 0; /* KERNEL entry point for descriptor */ switch(BX_reg(context)) { case 0x0000: entryPoint = 183; break; /* __0000H */ case 0x0040: entryPoint = 193; break; /* __0040H */ case 0xa000: entryPoint = 174; break; /* __A000H */ case 0xb000: entryPoint = 181; break; /* __B000H */ case 0xb800: entryPoint = 182; break; /* __B800H */ case 0xc000: entryPoint = 195; break; /* __C000H */ case 0xd000: entryPoint = 179; break; /* __D000H */ case 0xe000: entryPoint = 190; break; /* __E000H */ case 0xf000: entryPoint = 194; break; /* __F000H */ default: context->Eax = DOSMEM_AllocSelector(BX_reg(context)); break; } if (entryPoint) context->Eax = LOWORD(GetProcAddress16( GetModuleHandle16( "KERNEL" ), (LPCSTR)(ULONG_PTR)entryPoint )); } break; case 0x0003: /* Get next selector increment */ TRACE("get selector increment (__AHINCR)\n"); context->Eax = __AHINCR; break; case 0x0004: /* Lock selector (not supported) */ FIXME("lock selector not supported\n"); context->Eax = 0; /* FIXME: is this a correct return value? */ break; case 0x0005: /* Unlock selector (not supported) */ FIXME("unlock selector not supported\n"); context->Eax = 0; /* FIXME: is this a correct return value? */ break; case 0x0006: /* Get selector base address */ TRACE("get selector base address (0x%04x)\n",BX_reg(context)); if (!(dw = GetSelectorBase( BX_reg(context) ))) { context->Eax = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { CX_reg(context) = HIWORD(W32S_WINE2APP(dw)); DX_reg(context) = LOWORD(W32S_WINE2APP(dw)); } break; case 0x0007: /* Set selector base address */ TRACE("set selector base address (0x%04x,0x%08lx)\n", BX_reg(context), W32S_APP2WINE(MAKELONG(DX_reg(context),CX_reg(context)))); dw = W32S_APP2WINE(MAKELONG(DX_reg(context), CX_reg(context))); if (dw < 0x10000) /* app wants to access lower 64K of DOS memory, map it in now */ DOSMEM_Init(TRUE); SetSelectorBase(BX_reg(context), dw); break; case 0x0008: /* Set selector limit */ TRACE("set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context))); dw = MAKELONG( DX_reg(context), CX_reg(context) ); SetSelectorLimit16( BX_reg(context), dw ); break; case 0x0009: /* Set selector access rights */ TRACE("set selector access rights(0x%04x,0x%04x)\n",BX_reg(context),CX_reg(context)); SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) ); break; case 0x000a: /* Allocate selector alias */ TRACE("allocate selector alias (0x%04x)\n",BX_reg(context)); if (!(AX_reg(context) = AllocCStoDSAlias16( BX_reg(context) ))) { AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } break; case 0x000b: /* Get descriptor */ TRACE("get descriptor (0x%04x)\n",BX_reg(context)); { LDT_ENTRY entry; wine_ldt_set_base( &entry, (void*)W32S_WINE2APP(wine_ldt_get_base(&entry)) ); /* FIXME: should use ES:EDI for 32-bit clients */ *(LDT_ENTRY *)MapSL( MAKESEGPTR( context->SegEs, LOWORD(context->Edi) )) = entry; } break; case 0x000c: /* Set descriptor */ TRACE("set descriptor (0x%04x)\n",BX_reg(context)); { LDT_ENTRY entry = *(LDT_ENTRY *)MapSL(MAKESEGPTR( context->SegEs, LOWORD(context->Edi))); wine_ldt_set_base( &entry, (void*)W32S_APP2WINE(wine_ldt_get_base(&entry)) ); wine_ldt_set_entry( LOWORD(context->Ebx), &entry ); } break; case 0x000d: /* Allocate specific LDT descriptor */ FIXME("allocate descriptor (0x%04x), stub!\n",BX_reg(context)); AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); break; case 0x0100: /* Allocate DOS memory block */ TRACE("allocate DOS memory block (0x%x paragraphs)\n",BX_reg(context)); dw = GlobalDOSAlloc16((DWORD)BX_reg(context)<<4); if (dw) { AX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); } else { AX_reg(context) = 0x0008; /* insufficient memory */ BX_reg(context) = DOSMEM_Available()>>4; SET_CFLAG(context); } break; case 0x0101: /* Free DOS memory block */ TRACE("free DOS memory block (0x%04x)\n",DX_reg(context)); dw = GlobalDOSFree16(DX_reg(context)); if (!dw) { AX_reg(context) = 0x0009; /* memory block address invalid */ SET_CFLAG(context); } break; case 0x0200: /* get real mode interrupt vector */ FIXME("get realmode interupt vector(0x%02x) unimplemented.\n", BL_reg(context)); SET_CFLAG(context); break; case 0x0201: /* set real mode interrupt vector */ FIXME("set realmode interrupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context)); SET_CFLAG(context); break; case 0x0204: /* Get protected mode interrupt vector */ TRACE("get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context)); dw = (DWORD)INT_GetPMHandler( BL_reg(context) ); CX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); break; case 0x0205: /* Set protected mode interrupt vector */ TRACE("set protected mode interrupt handler (0x%02x,%p), stub!\n", BL_reg(context),MapSL(MAKESEGPTR(CX_reg(context),DX_reg(context)))); INT_SetPMHandler( BL_reg(context), (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context) )); break; case 0x0300: /* Simulate real mode interrupt */ CallRMInt( context ); break; case 0x0301: /* Call real mode procedure with far return */ CallRMProc( context, FALSE ); break; case 0x0302: /* Call real mode procedure with interrupt return */ CallRMProc( context, TRUE ); break; case 0x0303: /* Allocate Real Mode Callback Address */ AllocRMCB( context ); break; case 0x0304: /* Free Real Mode Callback Address */ FreeRMCB( context ); break; case 0x0305: /* Get State Save/Restore Addresses */ TRACE("get state save/restore addresses\n"); /* we probably won't need this kind of state saving */ AX_reg(context) = 0; /* real mode: just point to the lret */ BX_reg(context) = DOSMEM_wrap_seg; context->Ecx = 2; /* protected mode: don't have any handler yet... */ FIXME("no protected-mode dummy state save/restore handler yet\n"); SI_reg(context) = 0; context->Edi = 0; break; case 0x0306: /* Get Raw Mode Switch Addresses */ TRACE("get raw mode switch addresses\n"); /* real mode, point to standard DPMI return wrapper */ BX_reg(context) = DOSMEM_wrap_seg; context->Ecx = 0; /* protected mode, point to DPMI call wrapper */ SI_reg(context) = DOSMEM_dpmi_sel; context->Edi = 8; /* offset of the INT 0x31 call */ break; case 0x0400: /* Get DPMI version */ TRACE("get DPMI version\n"); { SYSTEM_INFO si; GetSystemInfo(&si); AX_reg(context) = 0x005a; /* DPMI version 0.90 */ BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */ CL_reg(context) = si.wProcessorLevel; DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/ break; } case 0x0500: /* Get free memory information */ TRACE("get free memory information\n"); { MEMMANINFO mmi; mmi.dwSize = sizeof(mmi); MemManInfo16(&mmi); ptr = MapSL(MAKESEGPTR(context->SegEs,DI_reg(context))); /* the layout is just the same as MEMMANINFO, but without * the dwSize entry. */ memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4); break; } case 0x0501: /* Allocate memory block */ TRACE("allocate memory block (%ld)\n",MAKELONG(CX_reg(context),BX_reg(context))); if (!(ptr = (BYTE *)DPMI_xalloc(MAKELONG(CX_reg(context), BX_reg(context))))) { AX_reg(context) = 0x8012; /* linear memory not available */ SET_CFLAG(context); } else { BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr)); CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr)); } break; case 0x0502: /* Free memory block */ TRACE("free memory block (0x%08lx)\n", W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)))); DPMI_xfree( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context), SI_reg(context))) ); break; case 0x0503: /* Resize memory block */ TRACE("resize memory block (0x%08lx,%ld)\n", W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context))), MAKELONG(CX_reg(context),BX_reg(context))); if (!(ptr = (BYTE *)DPMI_xrealloc( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context))), MAKELONG(CX_reg(context),BX_reg(context))))) { AX_reg(context) = 0x8012; /* linear memory not available */ SET_CFLAG(context); } else { BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr)); CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr)); } break; case 0x0507: /* Modify page attributes */ FIXME("modify page attributes unimplemented\n"); break; /* Just ignore it */ case 0x0600: /* Lock linear region */ FIXME("lock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0601: /* Unlock linear region */ FIXME("unlock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0602: /* Unlock real-mode region */ FIXME("unlock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0603: /* Lock real-mode region */ FIXME("lock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0604: /* Get page size */ TRACE("get pagesize\n"); BX_reg(context) = 0; CX_reg(context) = getpagesize(); break; case 0x0702: /* Mark page as demand-paging candidate */ FIXME("mark page as demand-paging candidate\n"); break; /* Just ignore it */ case 0x0703: /* Discard page contents */ FIXME("discard page contents\n"); break; /* Just ignore it */ case 0x0800: /* Physical address mapping */ FIXME("map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context),BX_reg(context))); if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context))))) { AX_reg(context) = 0x8021; SET_CFLAG(context); } else { BX_reg(context) = HIWORD(W32S_WINE2APP(ptr)); CX_reg(context) = LOWORD(W32S_WINE2APP(ptr)); RESET_CFLAG(context); } break; default: INT_BARF( context, 0x31 ); AX_reg(context) = 0x8001; /* unsupported function */ SET_CFLAG(context); break; } }