forked from Mirrors/wine-wine
657 lines
22 KiB
C
657 lines
22 KiB
C
/*
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* DPMI 0.9 emulation
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*
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* Copyright 1995 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winternl.h"
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#include "wine/winbase16.h"
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#include "wownt32.h"
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#include "kernel16_private.h"
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#include "dosexe.h"
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#include "excpt.h"
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#include "wine/debug.h"
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#include "wine/exception.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int31);
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static void* lastvalloced = NULL;
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/**********************************************************************
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* DPMI_xalloc
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* special virtualalloc, allocates linearly monoton growing memory.
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* (the usual VirtualAlloc does not satisfy that restriction)
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*/
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static LPVOID DPMI_xalloc( DWORD len )
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{
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LPVOID ret;
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LPVOID oldlastv = lastvalloced;
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if (lastvalloced)
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{
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int xflag = 0;
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ret = NULL;
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while (!ret)
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{
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ret = VirtualAlloc( lastvalloced, len,
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MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
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if (!ret)
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lastvalloced = (char *) lastvalloced + 0x10000;
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/* we failed to allocate one in the first round.
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* try non-linear
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*/
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if (!xflag && (lastvalloced<oldlastv))
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{
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/* wrapped */
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FIXME( "failed to allocate linearly growing memory (%u bytes), "
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"using non-linear growing...\n", len );
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xflag++;
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}
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/* if we even fail to allocate something in the next
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* round, return NULL
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*/
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if ((xflag==1) && (lastvalloced >= oldlastv))
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xflag++;
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if ((xflag==2) && (lastvalloced < oldlastv)) {
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FIXME( "failed to allocate any memory of %u bytes!\n", len );
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return NULL;
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}
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}
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}
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else
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{
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ret = VirtualAlloc( NULL, len,
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MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE );
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}
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lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
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return ret;
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}
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/**********************************************************************
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* DPMI_xfree
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*/
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static void DPMI_xfree( LPVOID ptr )
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{
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VirtualFree( ptr, 0, MEM_RELEASE );
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}
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/**********************************************************************
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* DPMI_xrealloc
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*
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* FIXME: perhaps we could grow this mapped area...
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*/
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static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize )
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{
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MEMORY_BASIC_INFORMATION mbi;
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if (ptr)
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{
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LPVOID newptr;
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if (!VirtualQuery(ptr,&mbi,sizeof(mbi)))
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{
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FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
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return NULL;
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}
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if (mbi.State == MEM_FREE)
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{
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FIXME( "realloc of DPMI_xallocd region %p?\n", ptr );
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return NULL;
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}
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/* We do not shrink allocated memory. most reallocs
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* only do grows anyway
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*/
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if (newsize <= mbi.RegionSize)
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return ptr;
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newptr = DPMI_xalloc( newsize );
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if (!newptr)
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return NULL;
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memcpy( newptr, ptr, mbi.RegionSize );
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DPMI_xfree( ptr );
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return newptr;
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}
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return DPMI_xalloc( newsize );
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}
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/**********************************************************************
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* DOSVM_Int31Handler
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*
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* Handler for int 31h (DPMI).
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*/
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void WINAPI DOSVM_Int31Handler( CONTEXT *context )
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{
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RESET_CFLAG(context);
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switch(AX_reg(context))
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{
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case 0x0000: /* Allocate LDT descriptors */
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TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) );
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{
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WORD sel = AllocSelectorArray16( CX_reg(context) );
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if(!sel)
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{
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TRACE( "failed\n" );
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SET_AX( context, 0x8011 ); /* descriptor unavailable */
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SET_CFLAG( context );
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}
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else
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{
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TRACE( "success, array starts at 0x%04x\n", sel );
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SET_AX( context, sel );
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}
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}
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break;
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case 0x0001: /* Free LDT descriptor */
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TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) );
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if (FreeSelector16( BX_reg(context) ))
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{
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SET_AX( context, 0x8022 ); /* invalid selector */
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SET_CFLAG( context );
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}
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else
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{
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/* If a segment register contains the selector being freed, */
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/* set it to zero. */
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if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0;
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if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0;
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if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0;
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if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0;
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}
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break;
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case 0x0002: /* Real mode segment to descriptor */
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TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) );
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{
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WORD entryPoint = 0; /* KERNEL entry point for descriptor */
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switch(BX_reg(context))
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{
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case 0x0000: entryPoint = 183; break; /* __0000H */
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case 0x0040: entryPoint = 193; break; /* __0040H */
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case 0xa000: entryPoint = 174; break; /* __A000H */
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case 0xb000: entryPoint = 181; break; /* __B000H */
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case 0xb800: entryPoint = 182; break; /* __B800H */
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case 0xc000: entryPoint = 195; break; /* __C000H */
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case 0xd000: entryPoint = 179; break; /* __D000H */
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case 0xe000: entryPoint = 190; break; /* __E000H */
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case 0xf000: entryPoint = 194; break; /* __F000H */
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default:
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FIXME("Real mode segment (%x) to descriptor: no longer supported\n",
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BX_reg(context));
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SET_CFLAG( context );
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break;
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}
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if (entryPoint)
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{
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FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
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(LPCSTR)(ULONG_PTR)entryPoint );
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SET_AX( context, LOWORD(proc) );
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}
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}
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break;
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case 0x0003: /* Get next selector increment */
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TRACE("get selector increment (__AHINCR)\n");
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context->Eax = __AHINCR;
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break;
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case 0x0004: /* Lock selector (not supported) */
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FIXME("lock selector not supported\n");
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context->Eax = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0005: /* Unlock selector (not supported) */
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FIXME("unlock selector not supported\n");
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context->Eax = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0006: /* Get selector base address */
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TRACE( "get selector base address (0x%04x)\n", BX_reg(context) );
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if (!ldt_is_valid( BX_reg(context) ))
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{
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context->Eax = 0x8022; /* invalid selector */
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SET_CFLAG(context);
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}
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else
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{
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void *base = ldt_get_base( BX_reg(context) );
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SET_CX( context, HIWORD(base) );
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SET_DX( context, LOWORD(base) );
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}
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break;
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case 0x0007: /* Set selector base address */
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{
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DWORD base = MAKELONG( DX_reg(context), CX_reg(context) );
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WORD sel = BX_reg(context);
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TRACE( "set selector base address (0x%04x,0x%08x)\n", sel, base );
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/* check if Win16 app wants to access lower 64K of DOS memory */
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if (base < 0x10000) DOSMEM_MapDosLayout();
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SetSelectorBase( sel, base );
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}
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break;
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case 0x0008: /* Set selector limit */
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{
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DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) );
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TRACE( "set selector limit (0x%04x,0x%08x)\n",
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BX_reg(context), limit );
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SetSelectorLimit16( BX_reg(context), limit );
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}
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break;
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case 0x0009: /* Set selector access rights */
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TRACE( "set selector access rights(0x%04x,0x%04x)\n",
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BX_reg(context), CX_reg(context) );
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SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) );
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break;
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case 0x000a: /* Allocate selector alias */
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TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) );
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SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ) );
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if (!AX_reg(context))
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{
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SET_AX( context, 0x8011 ); /* descriptor unavailable */
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SET_CFLAG(context);
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}
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break;
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case 0x000b: /* Get descriptor */
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TRACE( "get descriptor (0x%04x)\n", BX_reg(context) );
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{
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LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
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context->Edi );
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ldt_get_entry( BX_reg(context), entry );
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}
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break;
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case 0x000c: /* Set descriptor */
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TRACE( "set descriptor (0x%04x)\n", BX_reg(context) );
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{
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LDT_ENTRY *entry = CTX_SEG_OFF_TO_LIN( context, context->SegEs,
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context->Edi );
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if (!ldt_is_system( BX_reg(context) )) ldt_set_entry( BX_reg(context), *entry );
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}
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break;
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case 0x000d: /* Allocate specific LDT descriptor */
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FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) );
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SET_AX( context, 0x8011 ); /* descriptor unavailable */
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SET_CFLAG( context );
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break;
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case 0x000e: /* Get Multiple Descriptors (1.0) */
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FIXME( "get multiple descriptors - unimplemented\n" );
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break;
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case 0x000f: /* Set Multiple Descriptors (1.0) */
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FIXME( "set multiple descriptors - unimplemented\n" );
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break;
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case 0x0100: /* Allocate DOS memory block */
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TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) );
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{
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DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 );
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if (dw) {
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SET_AX( context, HIWORD(dw) );
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SET_DX( context, LOWORD(dw) );
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} else {
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SET_AX( context, 0x0008 ); /* insufficient memory */
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SET_BX( context, DOSMEM_Available() >> 4 );
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SET_CFLAG(context);
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}
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break;
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}
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case 0x0101: /* Free DOS memory block */
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TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) );
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{
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WORD error = GlobalDOSFree16( DX_reg(context) );
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if (error) {
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SET_AX( context, 0x0009 ); /* memory block address invalid */
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SET_CFLAG( context );
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}
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}
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break;
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case 0x0102: /* Resize DOS Memory Block */
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FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n",
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DX_reg(context), BX_reg(context) );
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break;
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case 0x0200: /* get real mode interrupt vector */
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TRACE( "get realmode interrupt vector (0x%02x) - not supported\n",
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BL_reg(context) );
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SET_CX( context, 0 );
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SET_DX( context, 0 );
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break;
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case 0x0201: /* set real mode interrupt vector */
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TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x) - not supported\n",
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BL_reg(context), CX_reg(context), DX_reg(context) );
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break;
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case 0x0202: /* Get Processor Exception Handler Vector */
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FIXME( "Get Processor Exception Handler Vector (0x%02x)\n",
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BL_reg(context) );
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SET_CX( context, 0 );
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SET_DX( context, 0 );
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break;
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case 0x0203: /* Set Processor Exception Handler Vector */
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FIXME( "Set Processor Exception Handler Vector (0x%02x)\n",
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BL_reg(context) );
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break;
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case 0x0204: /* Get protected mode interrupt vector */
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TRACE("get protected mode interrupt handler (0x%02x)\n",
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BL_reg(context));
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{
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FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) );
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SET_CX( context, SELECTOROF(handler) );
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SET_DX( context, OFFSETOF(handler) );
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}
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break;
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case 0x0205: /* Set protected mode interrupt vector */
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TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08x)\n",
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BL_reg(context), CX_reg(context), context->Edx);
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{
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FARPROC16 handler;
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handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context));
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DOSVM_SetPMHandler16( BL_reg(context), handler );
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}
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break;
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case 0x0300: /* Simulate real mode interrupt */
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TRACE( "Simulate real mode interrupt %02x - not supported\n", BL_reg(context));
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break;
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case 0x0301: /* Call real mode procedure with far return */
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TRACE( "Call real mode procedure with far return - not supported\n" );
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break;
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case 0x0302: /* Call real mode procedure with interrupt return */
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TRACE( "Call real mode procedure with interrupt return - not supported\n" );
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break;
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case 0x0303: /* Allocate Real Mode Callback Address */
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TRACE( "Allocate real mode callback address - not supported\n" );
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break;
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case 0x0304: /* Free Real Mode Callback Address */
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TRACE( "Free real mode callback address - not supported\n" );
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break;
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case 0x0305: /* Get State Save/Restore Addresses */
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TRACE("get state save/restore addresses - no longer supported\n");
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/* we probably won't need this kind of state saving */
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SET_AX( context, 0 );
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/* real mode */
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SET_BX( context, 0 );
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SET_CX( context, 0 );
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/* protected mode */
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SET_SI( context, 0 );
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context->Edi = 0;
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break;
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case 0x0306: /* Get Raw Mode Switch Addresses */
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TRACE("get raw mode switch addresses - no longer supported\n");
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/* real mode */
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SET_BX( context, 0 );
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SET_CX( context, 0 );
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/* protected mode */
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SET_SI( context, 0 );
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context->Edi = 0;
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break;
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case 0x0400: /* Get DPMI version */
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TRACE("get DPMI version\n");
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{
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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SET_AX( context, 0x005a ); /* DPMI version 0.90 */
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SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
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SET_CL( context, si.wProcessorLevel );
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SET_DX( context, 0x0870 ); /* Interrupt controller base */
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}
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break;
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case 0x0401: /* Get DPMI Capabilities (1.0) */
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FIXME( "get dpmi capabilities - unimplemented\n");
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break;
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case 0x0500: /* Get free memory information */
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TRACE("get free memory information\n");
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{
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MEMORYSTATUS status;
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SYSTEM_BASIC_INFORMATION sbi;
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/* the layout is just the same as MEMMANINFO, but without
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* the dwSize entry.
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*/
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struct
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{
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DWORD dwLargestFreeBlock;
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DWORD dwMaxPagesAvailable;
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DWORD dwMaxPagesLockable;
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DWORD dwTotalLinearSpace;
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DWORD dwTotalUnlockedPages;
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DWORD dwFreePages;
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DWORD dwTotalPages;
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DWORD dwFreeLinearSpace;
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DWORD dwSwapFilePages;
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WORD wPageSize;
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} *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
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GlobalMemoryStatus( &status );
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NtQuerySystemInformation( SystemBasicInformation, &sbi, sizeof(sbi), NULL );
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info->wPageSize = sbi.PageSize;
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info->dwLargestFreeBlock = status.dwAvailVirtual;
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info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
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info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
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info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
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info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
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info->dwFreePages = info->dwMaxPagesAvailable;
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info->dwTotalPages = info->dwTotalLinearSpace;
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info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
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info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
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break;
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}
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case 0x0501: /* Allocate memory block */
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{
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DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
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BYTE *ptr;
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TRACE( "allocate memory block (%u bytes)\n", size );
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ptr = DPMI_xalloc( size );
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if (!ptr)
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{
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SET_AX( context, 0x8012 ); /* linear memory not available */
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SET_CFLAG(context);
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}
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else
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{
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SET_BX( context, HIWORD(ptr) );
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SET_CX( context, LOWORD(ptr) );
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SET_SI( context, HIWORD(ptr) );
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SET_DI( context, LOWORD(ptr) );
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}
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break;
|
|
}
|
|
|
|
case 0x0502: /* Free memory block */
|
|
{
|
|
DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
|
|
TRACE( "free memory block (0x%08x)\n", handle );
|
|
DPMI_xfree( (void *)handle );
|
|
}
|
|
break;
|
|
|
|
case 0x0503: /* Resize memory block */
|
|
{
|
|
DWORD size = MAKELONG( CX_reg(context), BX_reg(context) );
|
|
DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) );
|
|
BYTE *ptr;
|
|
|
|
TRACE( "resize memory block (0x%08x, %u bytes)\n", handle, size );
|
|
|
|
ptr = DPMI_xrealloc( (void *)handle, size );
|
|
if (!ptr)
|
|
{
|
|
SET_AX( context, 0x8012 ); /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
} else {
|
|
SET_BX( context, HIWORD(ptr) );
|
|
SET_CX( context, LOWORD(ptr) );
|
|
SET_SI( context, HIWORD(ptr) );
|
|
SET_DI( context, LOWORD(ptr) );
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x0507: /* Set page attributes (1.0) */
|
|
FIXME( "set page attributes - unimplemented\n" );
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0600: /* Lock linear region */
|
|
TRACE( "lock linear region - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0601: /* Unlock linear region */
|
|
TRACE( "unlock linear region - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0602: /* Mark real mode region as pageable */
|
|
TRACE( "mark real mode region as pageable - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0603: /* Relock real mode region */
|
|
TRACE( "relock real mode region - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0604: /* Get page size */
|
|
{
|
|
SYSTEM_BASIC_INFORMATION info;
|
|
TRACE("get pagesize\n");
|
|
NtQuerySystemInformation( SystemBasicInformation, &info, sizeof(info), NULL );
|
|
SET_BX( context, HIWORD(info.PageSize) );
|
|
SET_CX( context, LOWORD(info.PageSize) );
|
|
break;
|
|
}
|
|
case 0x0700: /* Mark pages as paging candidates */
|
|
TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0701: /* Discard pages */
|
|
TRACE( "discard pages - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0702: /* Mark page as demand-paging candidate */
|
|
TRACE( "mark page as demand-paging candidate - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0703: /* Discard page contents */
|
|
TRACE( "discard page contents - ignored (no paging)\n" );
|
|
break;
|
|
|
|
case 0x0800: /* Physical address mapping */
|
|
FIXME( "physical address mapping (0x%08x) - unimplemented\n",
|
|
MAKELONG(CX_reg(context),BX_reg(context)) );
|
|
break;
|
|
|
|
case 0x0900: /* Get and Disable Virtual Interrupt State */
|
|
TRACE( "Get and Disable Virtual Interrupt State - not supported\n" );
|
|
break;
|
|
|
|
case 0x0901: /* Get and Enable Virtual Interrupt State */
|
|
TRACE( "Get and Enable Virtual Interrupt State - not supported\n" );
|
|
break;
|
|
|
|
case 0x0902: /* Get Virtual Interrupt State */
|
|
TRACE( "Get Virtual Interrupt State - not supported\n" );
|
|
break;
|
|
|
|
case 0x0e00: /* Get Coprocessor Status (1.0) */
|
|
/*
|
|
* Return status in AX bits:
|
|
* B0 - MPv (MP bit in the virtual MSW/CR0)
|
|
* 0 = numeric coprocessor is disabled for this client
|
|
* 1 = numeric coprocessor is enabled for this client
|
|
* B1 - EMv (EM bit in the virtual MSW/CR0)
|
|
* 0 = client is not emulating coprocessor instructions
|
|
* 1 = client is emulating coprocessor instructions
|
|
* B2 - MPr (MP bit from the actual MSW/CR0)
|
|
* 0 = numeric coprocessor is not present
|
|
* 1 = numeric coprocessor is present
|
|
* B3 - EMr (EM bit from the actual MSW/CR0)
|
|
* 0 = host is not emulating coprocessor instructions
|
|
* 1 = host is emulating coprocessor instructions
|
|
* B4-B7 - coprocessor type
|
|
* 00H = no coprocessor
|
|
* 02H = 80287
|
|
* 03H = 80387
|
|
* 04H = 80486 with numeric coprocessor
|
|
* 05H-0FH = reserved for future numeric processors
|
|
*/
|
|
TRACE( "Get Coprocessor Status\n" );
|
|
SET_AX( context, 69 ); /* 486, coprocessor present and enabled */
|
|
break;
|
|
|
|
case 0x0e01: /* Set Coprocessor Emulation (1.0) */
|
|
/*
|
|
* See function 0x0e00.
|
|
* BX bit B0 is new value for MPv.
|
|
* BX bit B1 is new value for EMv.
|
|
*/
|
|
if (BX_reg(context) != 1)
|
|
FIXME( "Set Coprocessor Emulation to %d - unimplemented\n",
|
|
BX_reg(context) );
|
|
else
|
|
TRACE( "Set Coprocessor Emulation - ignored\n" );
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x31 );
|
|
SET_AX( context, 0x8001 ); /* unsupported function */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
}
|