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eca6182749
dll. Make CTX_SEG_OFF_TO_LIN work with 32-bit segmented pointers common in DPMI32. Fix winedos initialization so that DOSMEM_Init(TRUE) is only called when DOS executable is started.
615 lines
20 KiB
C
615 lines
20 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <string.h>
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#include "windef.h"
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#include "wine/winbase16.h"
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#include "miscemu.h"
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#include "msdos.h"
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#include "task.h"
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#include "toolhelp.h"
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#include "selectors.h"
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#include "callback.h"
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#include "wine/debug.h"
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#include "stackframe.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int31);
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#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
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void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */
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static void* lastvalloced = NULL;
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DOSVM_TABLE Dosvm = { NULL, };
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static HMODULE DosModule;
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/**********************************************************************
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* DPMI_LoadDosSystem
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*/
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BOOL DPMI_LoadDosSystem(void)
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{
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if (DosModule) return TRUE;
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DosModule = LoadLibraryA( "winedos.dll" );
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if (!DosModule) {
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ERR("could not load winedos.dll, DOS subsystem unavailable\n");
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return FALSE;
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}
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#define GET_ADDR(func) Dosvm.func = (void *)GetProcAddress(DosModule, #func);
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GET_ADDR(LoadDosExe);
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GET_ADDR(CallRMInt);
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GET_ADDR(CallRMProc);
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GET_ADDR(AllocRMCB);
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GET_ADDR(FreeRMCB);
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GET_ADDR(RawModeSwitch);
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GET_ADDR(SetTimer);
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GET_ADDR(GetTimer);
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GET_ADDR(inport);
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GET_ADDR(outport);
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GET_ADDR(ASPIHandler);
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GET_ADDR(EmulateInterruptPM);
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#undef GET_ADDR
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return TRUE;
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}
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/**********************************************************************
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* DPMI_xalloc
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* special virtualalloc, allocates lineary 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
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DPMI_xalloc(int len) {
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LPVOID ret;
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LPVOID oldlastv = lastvalloced;
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if (lastvalloced) {
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int xflag = 0;
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ret = NULL;
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while (!ret) {
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ret=VirtualAlloc(lastvalloced,len,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)) { /* wrapped */
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FIXME("failed to allocate lineary growing memory (%d bytes), 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 %d bytes!\n",len);
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return NULL;
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}
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}
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} else
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ret=VirtualAlloc(NULL,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE);
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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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static void
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DPMI_xfree(LPVOID ptr) {
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VirtualFree(ptr,0,MEM_RELEASE);
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}
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/* FIXME: perhaps we could grow this mapped area... */
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static LPVOID
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DPMI_xrealloc(LPVOID ptr,DWORD newsize) {
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MEMORY_BASIC_INFORMATION mbi;
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LPVOID newptr;
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newptr = DPMI_xalloc(newsize);
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if (ptr) {
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if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) {
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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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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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memcpy(newptr,ptr,mbi.RegionSize);
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DPMI_xfree(ptr);
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}
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return newptr;
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}
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/**********************************************************************
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* CallRMInt
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*/
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static void CallRMInt( CONTEXT86 *context )
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{
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if (!Dosvm.CallRMInt && !DPMI_LoadDosSystem())
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{
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ERR("could not setup real-mode calls\n");
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return;
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}
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Dosvm.CallRMInt( context );
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}
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static void CallRMProc( CONTEXT86 *context, int iret )
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{
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if (!Dosvm.CallRMProc && !DPMI_LoadDosSystem())
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{
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ERR("could not setup real-mode calls\n");
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return;
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}
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Dosvm.CallRMProc( context, iret );
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}
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static void AllocRMCB( CONTEXT86 *context )
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{
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if (!Dosvm.AllocRMCB && !DPMI_LoadDosSystem())
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{
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ERR("could not setup real-mode calls\n");
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return;
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}
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Dosvm.AllocRMCB( context );
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}
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static void FreeRMCB( CONTEXT86 *context )
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{
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if (!Dosvm.FreeRMCB) /* cannot have allocated one if dosvm not loaded */
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{
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SET_LOWORD( context->Eax, 0x8024 ); /* invalid callback address */
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SET_CFLAG( context );
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}
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else Dosvm.FreeRMCB( context );
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}
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static void RawModeSwitch( CONTEXT86 *context )
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{
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if (!Dosvm.RawModeSwitch)
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{
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ERR("could not setup real-mode calls\n");
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return;
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}
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else
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{
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/*
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* FIXME: This routine will not work if it is called
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* from 32 bit DPMI program and the program returns
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* to protected mode while ESP or EIP is over 0xffff.
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* FIXME: This routine will not work if it is not called
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* using 16-bit-to-Wine callback glue function.
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*/
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STACK16FRAME frame = *CURRENT_STACK16;
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Dosvm.RawModeSwitch( context );
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/*
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* After this function returns to relay code, protected mode
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* 16 bit stack will contain STACK16FRAME and single WORD
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* (EFlags, see next comment).
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*/
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NtCurrentTeb()->cur_stack =
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MAKESEGPTR( context->SegSs,
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context->Esp - sizeof(STACK16FRAME) - sizeof(WORD) );
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/*
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* After relay code returns to glue function, protected
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* mode 16 bit stack will contain interrupt return record:
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* IP, CS and EFlags. Since EFlags is ignored, it won't
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* need to be initialized.
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*/
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context->Esp -= 3 * sizeof(WORD);
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/*
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* Restore stack frame so that relay code won't be confused.
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* It should be noted that relay code overwrites IP and CS
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* in STACK16FRAME with values taken from current CONTEXT86.
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* These values are what is returned to glue function
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* (see previous comment).
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*/
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*CURRENT_STACK16 = frame;
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}
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}
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/**********************************************************************
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* INT_Int31Handler (WPROCS.149)
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*
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* Handler for int 31h (DPMI).
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*/
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void WINAPI INT_Int31Handler( CONTEXT86 *context )
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{
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/*
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* Note: For Win32s processes, the whole linear address space is
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* shifted by 0x10000 relative to the OS linear address space.
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* See the comment in msdos/vxd.c.
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*/
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DWORD dw;
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BYTE *ptr;
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if (context->SegCs == DOSMEM_dpmi_segments.dpmi_sel) {
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RawModeSwitch( context );
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return;
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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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if (!(context->Eax = AllocSelectorArray16( CX_reg(context) )))
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{
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TRACE("failed\n");
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context->Eax = 0x8011; /* descriptor unavailable */
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SET_CFLAG(context);
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}
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TRACE("success, array starts at 0x%04x\n",AX_reg(context));
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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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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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/* 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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context->Eax = DOSMEM_AllocSelector(BX_reg(context));
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break;
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}
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if (entryPoint)
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context->Eax = LOWORD(GetProcAddress16( GetModuleHandle16( "KERNEL" ),
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(LPCSTR)(ULONG_PTR)entryPoint ));
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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 (!(dw = GetSelectorBase( 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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SET_CX( context, HIWORD(W32S_WINE2APP(dw)) );
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SET_DX( context, LOWORD(W32S_WINE2APP(dw)) );
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}
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break;
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case 0x0007: /* Set selector base address */
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TRACE("set selector base address (0x%04x,0x%08lx)\n",
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BX_reg(context),
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W32S_APP2WINE(MAKELONG(DX_reg(context),CX_reg(context))));
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dw = W32S_APP2WINE(MAKELONG(DX_reg(context), CX_reg(context)));
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if (dw < 0x10000)
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/* app wants to access lower 64K of DOS memory, load DOS subsystem */
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DPMI_LoadDosSystem();
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SetSelectorBase(BX_reg(context), dw);
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break;
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case 0x0008: /* Set selector limit */
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TRACE("set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context)));
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dw = MAKELONG( DX_reg(context), CX_reg(context) );
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SetSelectorLimit16( BX_reg(context), dw );
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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",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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if (!SET_AX( context, AllocCStoDSAlias16( BX_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;
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wine_ldt_get_entry( LOWORD(context->Ebx), &entry);
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wine_ldt_set_base( &entry, (void*)W32S_WINE2APP(wine_ldt_get_base(&entry)) );
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/* FIXME: should use ES:EDI for 32-bit clients */
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*(LDT_ENTRY *)MapSL( MAKESEGPTR( context->SegEs, LOWORD(context->Edi) )) = 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 = *(LDT_ENTRY *)MapSL(MAKESEGPTR( context->SegEs, LOWORD(context->Edi)));
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wine_ldt_set_base( &entry, (void*)W32S_APP2WINE(wine_ldt_get_base(&entry)) );
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wine_ldt_set_entry( LOWORD(context->Ebx), &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 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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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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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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dw = GlobalDOSFree16(DX_reg(context));
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if (!dw) {
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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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break;
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case 0x0200: /* get real mode interrupt vector */
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FIXME("get realmode interupt vector(0x%02x) unimplemented.\n",
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BL_reg(context));
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SET_CFLAG(context);
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break;
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case 0x0201: /* set real mode interrupt vector */
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FIXME("set realmode interrupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context));
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SET_CFLAG(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), stub!\n",BL_reg(context));
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dw = (DWORD)INT_GetPMHandler( BL_reg(context) );
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SET_CX( context, HIWORD(dw) );
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SET_DX( context, LOWORD(dw) );
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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,%p), stub!\n",
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BL_reg(context),MapSL(MAKESEGPTR(CX_reg(context),DX_reg(context))));
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INT_SetPMHandler( BL_reg(context),
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(FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context) ));
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break;
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case 0x0300: /* Simulate real mode interrupt */
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CallRMInt( context );
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break;
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case 0x0301: /* Call real mode procedure with far return */
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CallRMProc( context, FALSE );
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break;
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case 0x0302: /* Call real mode procedure with interrupt return */
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CallRMProc( context, TRUE );
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break;
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case 0x0303: /* Allocate Real Mode Callback Address */
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AllocRMCB( context );
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break;
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case 0x0304: /* Free Real Mode Callback Address */
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FreeRMCB( context );
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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\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: just point to the lret */
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SET_BX( context, DOSMEM_dpmi_segments.wrap_seg );
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context->Ecx = 2;
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/* protected mode: don't have any handler yet... */
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FIXME("no protected-mode dummy state save/restore handler yet\n");
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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\n");
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/* real mode, point to standard DPMI return wrapper */
|
|
SET_BX( context, DOSMEM_dpmi_segments.wrap_seg );
|
|
context->Ecx = 0;
|
|
/* protected mode, point to DPMI call wrapper */
|
|
SET_SI( context, DOSMEM_dpmi_segments.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);
|
|
SET_AX( context, 0x005a ); /* DPMI version 0.90 */
|
|
SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */
|
|
SET_CL( context, si.wProcessorLevel );
|
|
SET_DX( 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)))))
|
|
{
|
|
SET_AX( context, 0x8012 ); /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
} else {
|
|
SET_BX( context, HIWORD(W32S_WINE2APP(ptr)) );
|
|
SET_CX( context, LOWORD(W32S_WINE2APP(ptr)) );
|
|
SET_SI( context, HIWORD(W32S_WINE2APP(ptr)) );
|
|
SET_DI( 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)))))
|
|
{
|
|
SET_AX( context, 0x8012 ); /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
} else {
|
|
SET_BX( context, HIWORD(W32S_WINE2APP(ptr)) );
|
|
SET_CX( context, LOWORD(W32S_WINE2APP(ptr)) );
|
|
SET_SI( context, HIWORD(W32S_WINE2APP(ptr)) );
|
|
SET_DI( 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");
|
|
SET_BX( context, 0 );
|
|
SET_CX( 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)))))
|
|
{
|
|
SET_AX( context, 0x8021 );
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
SET_BX( context, HIWORD(W32S_WINE2APP(ptr)) );
|
|
SET_CX( context, LOWORD(W32S_WINE2APP(ptr)) );
|
|
RESET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x31 );
|
|
SET_AX( context, 0x8001 ); /* unsupported function */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
|
|
}
|