| /* |
| * DPMI 0.9 emulation |
| * |
| * Copyright 1995 Alexandre Julliard |
| */ |
| |
| #include <unistd.h> |
| #include <string.h> |
| |
| #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)) { /* 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; |
| } |
| /********************************************************************** |
| * 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; |
| } |
| |
| } |
