| /* |
| * DPMI 0.9 emulation |
| * |
| * Copyright 1995 Alexandre Julliard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <unistd.h> |
| #include <string.h> |
| |
| #include "windef.h" |
| #include "wine/winbase16.h" |
| #include "miscemu.h" |
| #include "msdos.h" |
| #include "task.h" |
| #include "toolhelp.h" |
| #include "selectors.h" |
| #include "callback.h" |
| #include "wine/debug.h" |
| #include "stackframe.h" |
| |
| WINE_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(RawModeSwitch); |
| 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)) { /* wrapped */ |
| FIXME("failed to allocate lineary growing memory (%d bytes), using non-linear growing...\n",len); |
| xflag++; |
| } |
| /* if we even fail to allocate something in the next |
| * round, return NULL |
| */ |
| if ((xflag==1) && (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 ); |
| } |
| |
| static void RawModeSwitch( CONTEXT86 *context ) |
| { |
| if (!Dosvm.RawModeSwitch) |
| { |
| ERR("could not setup real-mode calls\n"); |
| return; |
| } |
| else |
| { |
| /* |
| * FIXME: This routine will not work if it is called |
| * from 32 bit DPMI program and the program returns |
| * to protected mode while ESP or EIP is over 0xffff. |
| * FIXME: This routine will not work if it is not called |
| * using 16-bit-to-Wine callback glue function. |
| */ |
| STACK16FRAME frame = *CURRENT_STACK16; |
| |
| Dosvm.RawModeSwitch( context ); |
| |
| /* |
| * After this function returns to relay code, protected mode |
| * 16 bit stack will contain STACK16FRAME and single WORD |
| * (EFlags, see next comment). |
| */ |
| NtCurrentTeb()->cur_stack = |
| MAKESEGPTR( context->SegSs, |
| context->Esp - sizeof(STACK16FRAME) - sizeof(WORD) ); |
| |
| /* |
| * After relay code returns to glue function, protected |
| * mode 16 bit stack will contain interrupt return record: |
| * IP, CS and EFlags. Since EFlags is ignored, it won't |
| * need to be initialized. |
| */ |
| context->Esp -= 3 * sizeof(WORD); |
| |
| /* |
| * Restore stack frame so that relay code won't be confused. |
| * It should be noted that relay code overwrites IP and CS |
| * in STACK16FRAME with values taken from current CONTEXT86. |
| * These values are what is returned to glue function |
| * (see previous comment). |
| */ |
| *CURRENT_STACK16 = frame; |
| } |
| } |
| |
| /********************************************************************** |
| * 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; |
| |
| if (context->SegCs == DOSMEM_dpmi_sel) { |
| RawModeSwitch( context ); |
| 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, 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; |
| } |
| |
| } |
