/* * DPMI 0.9 emulation * * Copyright 1995 Alexandre Julliard */ #include #include #include #include "windows.h" #include "heap.h" #include "ldt.h" #include "module.h" #include "miscemu.h" #include "drive.h" #include "msdos.h" #include "toolhelp.h" #include "debug.h" #include "selectors.h" #include "thread.h" #include "stackframe.h" #include "callback.h" #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive()) void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */ /* 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; struct tagRMCB *next; } RMCB; static RMCB *FirstRMCB = NULL; /********************************************************************** * INT_GetRealModeContext */ static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context ) { EAX_reg(context) = call->eax; EBX_reg(context) = call->ebx; ECX_reg(context) = call->ecx; EDX_reg(context) = call->edx; ESI_reg(context) = call->esi; EDI_reg(context) = call->edi; EBP_reg(context) = call->ebp; EFL_reg(context) = call->fl; EIP_reg(context) = call->ip; ESP_reg(context) = call->sp; CS_reg(context) = call->cs; DS_reg(context) = call->ds; ES_reg(context) = call->es; FS_reg(context) = call->fs; GS_reg(context) = call->gs; } /********************************************************************** * INT_SetRealModeContext */ static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context ) { call->eax = EAX_reg(context); call->ebx = EBX_reg(context); call->ecx = ECX_reg(context); call->edx = EDX_reg(context); call->esi = ESI_reg(context); call->edi = EDI_reg(context); call->ebp = EBP_reg(context); call->fl = FL_reg(context); call->ip = IP_reg(context); call->sp = SP_reg(context); call->cs = CS_reg(context); call->ds = DS_reg(context); call->es = ES_reg(context); call->fs = FS_reg(context); call->gs = GS_reg(context); } /********************************************************************** * INT_DoRealModeInt */ static void INT_DoRealModeInt( CONTEXT *context ) { CONTEXT realmode_ctx; REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); INT_GetRealModeContext( call, &realmode_ctx ); RESET_CFLAG(context); switch (BL_reg(context)) { case 0x2f: /* int2f */ switch (AH_reg(&realmode_ctx)) { case 0x15: /* MSCDEX hook */ do_mscdex( &realmode_ctx ); break; default: SET_CFLAG(context); break; } break; case 0x21: /* int21 */ switch (AH_reg(&realmode_ctx)) { case 0x52: ES_reg(&realmode_ctx) = 0; EBX_reg(&realmode_ctx) = 0; break; case 0x65: switch (AL_reg(&realmode_ctx)) { case 0x06: {/* get collate table */ /* ES:DI is a REALMODE pointer to 5 byte dosmem * we fill that with 0x6, realmode pointer to collateTB */ char *table = DOSMEM_MapRealToLinear( MAKELONG(EDI_reg(&realmode_ctx),ES_reg(&realmode_ctx))); *(BYTE*)table = 0x06; *(DWORD*)(table+1) = DOSMEM_CollateTable; CX_reg(&realmode_ctx) = 258;/*FIXME: size of table?*/ break; } default: SET_CFLAG(context); break; } break; case 0x44: switch (AL_reg(&realmode_ctx)) { case 0x0D: {/* generic block device request */ BYTE *dataptr = DOSMEM_MapRealToLinear( MAKELONG(EDX_reg(&realmode_ctx),DS_reg(&realmode_ctx))); int drive = DOS_GET_DRIVE(BL_reg(&realmode_ctx)); if (CH_reg(&realmode_ctx) != 0x08) { SET_CFLAG(context); break; } switch (CL_reg(&realmode_ctx)) { case 0x66: { char label[12],fsname[9],path[4]; DWORD serial; strcpy(path,"x:\\");path[0]=drive+'A'; GetVolumeInformation32A(path,label,12,&serial,NULL,NULL,fsname,9); *(WORD*)dataptr = 0; memcpy(dataptr+2,&serial,4); memcpy(dataptr+6,label ,11); memcpy(dataptr+17,fsname,8); break; } case 0x60: /* get device parameters */ /* used by defrag.exe of win95 */ memset(dataptr, 0, 0x26); dataptr[0] = 0x04; dataptr[6] = 0; /* media type */ if (drive > 1) { dataptr[1] = 0x05; /* fixed disk */ setword(&dataptr[2], 0x01); /* non removable */ setword(&dataptr[4], 0x300); /* # of cylinders */ } else { dataptr[1] = 0x07; /* block dev, floppy */ setword(&dataptr[2], 0x02); /* removable */ setword(&dataptr[4], 80); /* # of cylinders */ } CreateBPB(drive, &dataptr[7], FALSE); break; default: SET_CFLAG(context); break; } } break; default: SET_CFLAG(context); break; } break; default: SET_CFLAG(context); break; } break; default: SET_CFLAG(context); break; } if (EFL_reg(context)&1) { FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx), ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx)); FIXME(int31," ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n", ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx), DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) ); } INT_SetRealModeContext( call, &realmode_ctx ); } static void CallRMProcFar( CONTEXT *context ) { REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); CONTEXT context16; THDB *thdb = THREAD_Current(); WORD argsize, sel; LPVOID addr; SEGPTR seg_addr; TRACE(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); TRACE(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context) ); 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); addr = DOSMEM_MapRealToLinear(MAKELONG(p->ip, p->cs)); sel = SELECTOR_AllocBlock( addr, 0x10000, SEGMENT_CODE, FALSE, FALSE ); seg_addr = PTR_SEG_OFF_TO_SEGPTR( sel, 0 ); CS_reg(&context16) = HIWORD(seg_addr); IP_reg(&context16) = LOWORD(seg_addr); EBP_reg(&context16) = OFFSETOF( thdb->cur_stack ) + (WORD)&((STACK16FRAME*)0)->bp; argsize = CX_reg(context)*sizeof(WORD); memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize, (LPBYTE)PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context))+6, argsize ); Callbacks->CallRegisterShortProc(&context16, argsize); UnMapLS(seg_addr); INT_SetRealModeContext(p, &context16); } void WINAPI RMCallbackProc( FARPROC16 pmProc, REALMODECALL *rmc ) { CONTEXT ctx; INT_GetRealModeContext(rmc, &ctx); Callbacks->CallRegisterShortProc(&ctx, 0); } static void AllocRMCB( CONTEXT *context ) { RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB)); REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); UINT16 uParagraph; FIXME(int31, "EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip); FIXME(int31, " Function to call: %04x:%04x\n", (WORD)DS_reg(context), SI_reg(context) ); if (NewRMCB) { LPVOID RMCBmem = DOSMEM_GetBlock(20, &uParagraph); LPBYTE p = RMCBmem; *p++ = 0x68; /* pushl */ *(FARPROC16 *)p = PTR_SEG_OFF_TO_LIN(ES_reg(context), SI_reg(context)); /* pmode proc to call */ p+=4; *p++ = 0x68; /* pushl */ *(LPVOID *)p = PTR_SEG_OFF_TO_LIN(ES_reg(context), DI_reg(context)); p+=4; *p++ = 0x9a; /* lcall */ *(FARPROC16 *)p = (FARPROC16)RMCallbackProc; /* FIXME ? */ p+=4; GET_CS(*(WORD *)p); p+=2; *p++=0xc3; /* retf */ NewRMCB->address = MAKELONG(0, uParagraph); NewRMCB->next = FirstRMCB; FirstRMCB = NewRMCB; CX_reg(context) = uParagraph; DX_reg(context) = 0; } else { AX_reg(context) = 0x8015; /* callback unavailable */ SET_CFLAG(context); } } static void FreeRMCB( CONTEXT *context ) { RMCB *CurrRMCB = FirstRMCB; RMCB *PrevRMCB = NULL; FIXME(int31, "callback address: %04x:%04x\n", CX_reg(context), DX_reg(context)); while (CurrRMCB && (CurrRMCB->address != MAKELONG(DX_reg(context), CX_reg(context)))) { 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); } else { AX_reg(context) = 0x8024; /* invalid callback address */ SET_CFLAG(context); } } /********************************************************************** * INT_Int31Handler * * Handler for int 31h (DPMI). */ void WINAPI INT_Int31Handler( CONTEXT *context ) { DWORD dw; BYTE *ptr; RESET_CFLAG(context); switch(AX_reg(context)) { case 0x0000: /* Allocate LDT descriptors */ if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) ))) { AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } break; case 0x0001: /* Free LDT descriptor */ if (FreeSelector( BX_reg(context) )) { AX_reg(context) = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { /* If a segment register contains the selector being freed, */ /* set it to zero. */ if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0; if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0; if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0; if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0; } break; case 0x0002: /* Real mode segment to descriptor */ { 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: AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context)); break; } if (entryPoint) AX_reg(context) = LOWORD(NE_GetEntryPoint( GetModuleHandle16( "KERNEL" ), entryPoint )); } break; case 0x0003: /* Get next selector increment */ AX_reg(context) = __AHINCR; break; case 0x0004: /* Lock selector (not supported) */ AX_reg(context) = 0; /* FIXME: is this a correct return value? */ break; case 0x0005: /* Unlock selector (not supported) */ AX_reg(context) = 0; /* FIXME: is this a correct return value? */ break; case 0x0006: /* Get selector base address */ if (!(dw = GetSelectorBase( BX_reg(context) ))) { AX_reg(context) = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { CX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); } break; case 0x0007: /* Set selector base address */ SetSelectorBase( BX_reg(context), MAKELONG( DX_reg(context), CX_reg(context) ) ); break; case 0x0008: /* Set selector limit */ SetSelectorLimit( BX_reg(context), MAKELONG( DX_reg(context), CX_reg(context) ) ); break; case 0x0009: /* Set selector access rights */ SelectorAccessRights( BX_reg(context), 1, CX_reg(context) ); break; case 0x000a: /* Allocate selector alias */ if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) ))) { AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); } break; case 0x000b: /* Get descriptor */ { ldt_entry entry; LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); /* FIXME: should use ES:EDI for 32-bit clients */ LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ), &entry ); } break; case 0x000c: /* Set descriptor */ { ldt_entry entry; LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ), &entry ); LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); } break; case 0x000d: /* Allocate specific LDT descriptor */ AX_reg(context) = 0x8011; /* descriptor unavailable */ SET_CFLAG(context); break; case 0x0200: /* get real mode interrupt vector */ FIXME(int31,"get realmode interupt vector(0x%02x) unimplemented.\n", BL_reg(context)); SET_CFLAG(context); break; case 0x0201: /* set real mode interrupt vector */ FIXME(int31, "set realmode interupt 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 */ dw = (DWORD)INT_GetHandler( BL_reg(context) ); CX_reg(context) = HIWORD(dw); DX_reg(context) = LOWORD(dw); break; case 0x0205: /* Set protected mode interrupt vector */ INT_SetHandler( BL_reg(context), (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context), DX_reg(context) )); break; case 0x0300: /* Simulate real mode interrupt */ INT_DoRealModeInt( context ); break; case 0x0301: /* Call real mode procedure with far return */ CallRMProcFar( context ); break; case 0x0302: /* Call real mode procedure with interrupt return */ { REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); FIXME(int31, "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip ); SET_CFLAG(context); } break; case 0x0303: /* Allocate Real Mode Callback Address */ AllocRMCB( context ); break; case 0x0304: /* Free Real Mode Callback Address */ FreeRMCB( context ); break; case 0x0400: /* Get DPMI version */ { 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 */ { MEMMANINFO mmi; mmi.dwSize = sizeof(mmi); MemManInfo(&mmi); ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),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 */ if (!(ptr = (BYTE *)VirtualAlloc(NULL, MAKELONG(CX_reg(context), BX_reg(context)), MEM_COMMIT, PAGE_EXECUTE_READWRITE))) { AX_reg(context) = 0x8012; /* linear memory not available */ SET_CFLAG(context); } else { BX_reg(context) = SI_reg(context) = HIWORD(ptr); CX_reg(context) = DI_reg(context) = LOWORD(ptr); } break; case 0x0502: /* Free memory block */ VirtualFree((void *)MAKELONG(DI_reg(context), SI_reg(context)), 0, MEM_RELEASE); break; case 0x0503: /* Resize memory block */ if (!(ptr = (BYTE *)HeapReAlloc( GetProcessHeap(), 0, (void *)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(ptr); CX_reg(context) = DI_reg(context) = LOWORD(ptr); } break; case 0x0600: /* Lock linear region */ break; /* Just ignore it */ case 0x0601: /* Unlock linear region */ break; /* Just ignore it */ case 0x0602: /* Unlock real-mode region */ break; /* Just ignore it */ case 0x0603: /* Lock real-mode region */ break; /* Just ignore it */ case 0x0604: /* Get page size */ BX_reg(context) = 0; CX_reg(context) = 4096; break; case 0x0702: /* Mark page as demand-paging candidate */ break; /* Just ignore it */ case 0x0703: /* Discard page contents */ break; /* Just ignore it */ case 0x0800: /* Physical address mapping */ if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context))))) { AX_reg(context) = 0x8021; SET_CFLAG(context); } else { BX_reg(context) = HIWORD(ptr); CX_reg(context) = LOWORD(ptr); RESET_CFLAG(context); } break; default: INT_BARF( context, 0x31 ); AX_reg(context) = 0x8001; /* unsupported function */ SET_CFLAG(context); break; } }