/* * DPMI 0.9 emulation * * Copyright 1995 Alexandre Julliard */ #include "config.h" #include "wine/port.h" #include #include #include "windef.h" #include "wine/winbase16.h" #include "builtin16.h" #include "miscemu.h" #include "msdos.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; DOSVM_TABLE Dosvm = { NULL, }; 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; } #define GET_ADDR(func) Dosvm.func = (void *)GetProcAddress(DosModule, #func); GET_ADDR(LoadDosExe); GET_ADDR(CallRMInt); GET_ADDR(CallRMProc); GET_ADDR(AllocRMCB); GET_ADDR(FreeRMCB); GET_ADDR(SetTimer); GET_ADDR(GetTimer); GET_ADDR(inport); GET_ADDR(outport); GET_ADDR(ASPIHandler); #undef GET_ADDR 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; } /********************************************************************** * CallRMInt */ static void CallRMInt( CONTEXT86 *context ) { if (!Dosvm.CallRMInt && !DPMI_LoadDosSystem()) { ERR("could not setup real-mode calls\n"); return; } Dosvm.CallRMInt( context ); } static void CallRMProc( CONTEXT86 *context, int iret ) { if (!Dosvm.CallRMProc && !DPMI_LoadDosSystem()) { ERR("could not setup real-mode calls\n"); return; } Dosvm.CallRMProc( context, iret ); } static void AllocRMCB( CONTEXT86 *context ) { if (!Dosvm.AllocRMCB && !DPMI_LoadDosSystem()) { ERR("could not setup real-mode calls\n"); return; } Dosvm.AllocRMCB( context ); } static void FreeRMCB( CONTEXT86 *context ) { if (!Dosvm.FreeRMCB) /* cannot have allocated one if dosvm not loaded */ { SET_LOWORD( context->Eax, 0x8024 ); /* invalid callback address */ SET_CFLAG( context ); } else Dosvm.FreeRMCB( context ); } /********************************************************************** * 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; 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, load DOS subsystem */ DPMI_LoadDosSystem(); 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; } }