static DWORD WINAPI MZ_DOSVM( LPVOID lpExtra )
{
CONTEXT context;
INT ret;
dosvm_pid = getpid();
memset( &context, 0, sizeof(context) );
context.SegCs = init_cs;
context.Eip = init_ip;
context.SegSs = init_ss;
context.Esp = init_sp;
context.SegDs = DOSVM_psp;
context.SegEs = DOSVM_psp;
context.EFlags = V86_FLAG | VIF_MASK;
DOSVM_SetTimer(0x10000);
ret = DOSVM_Enter( &context );
if (ret == -1)
{
/* fetch the app name from the environment */
PDB16 *psp = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
char *env = PTR_REAL_TO_LIN( psp->environment, 0 );
while (*env) env += strlen(env) + 1;
env += 1 + sizeof(WORD);
if (GetLastError() == ERROR_NOT_SUPPORTED)
MESSAGE( "wine: Cannot start DOS application %s\n"
" because vm86 mode is not supported on this platform.\n",
debugstr_a(env) );
else
FIXME( "vm86 mode failed error %u\n", GetLastError() );
}
dosvm_pid = 0;
return ret != 0;
}
/**********************************************************************
* EMS_access_name
*
* Get/set handle name.
*/
static void EMS_access_name( CONTEXT86 *context )
{
char *ptr;
int hindex = DX_reg(context);
if(hindex < 0 || hindex >= EMS_MAX_HANDLES) {
SET_AH( context, 0x83 ); /* invalid handle */
return;
}
switch AL_reg(context) {
case 0x00: /* get name */
ptr = PTR_REAL_TO_LIN(context->SegEs, DI_reg(context));
memcpy(ptr, EMS_record->handle[hindex].name, 8);
SET_AH( context, 0 );
break;
case 0x01: /* set name */
ptr = PTR_REAL_TO_LIN(context->SegDs, SI_reg(context));
memcpy(EMS_record->handle[hindex].name, ptr, 8);
SET_AH( context, 0 );
break;
default:
INT_BARF(context,0x67);
break;
}
}
/***********************************************************************
* MZ_Exit
*/
void WINAPI MZ_Exit( CONTEXT86 *context, BOOL cs_psp, WORD retval )
{
if (DOSVM_psp) {
WORD psp_seg = cs_psp ? context->SegCs : DOSVM_psp;
LPBYTE psp_start = (LPBYTE)((DWORD)psp_seg << 4);
PDB16 *psp = (PDB16 *)psp_start;
WORD parpsp = psp->parentPSP; /* check for parent DOS process */
if (parpsp) {
/* retrieve parent's return address */
FARPROC16 retaddr = DOSVM_GetRMHandler(0x22);
/* restore interrupts */
DOSVM_SetRMHandler(0x22, psp->savedint22);
DOSVM_SetRMHandler(0x23, psp->savedint23);
DOSVM_SetRMHandler(0x24, psp->savedint24);
/* FIXME: deallocate file handles etc */
/* free process's associated memory
* FIXME: walk memory and deallocate all blocks owned by process */
DOSMEM_FreeBlock( PTR_REAL_TO_LIN(psp->environment,0) );
DOSMEM_FreeBlock( PTR_REAL_TO_LIN(DOSVM_psp,0) );
/* switch to parent's PSP */
DOSVM_psp = parpsp;
psp_start = (LPBYTE)((DWORD)parpsp << 4);
psp = (PDB16 *)psp_start;
/* now return to parent */
DOSVM_retval = retval;
context->SegCs = SELECTOROF(retaddr);
context->Eip = OFFSETOF(retaddr);
context->SegSs = SELECTOROF(psp->saveStack);
context->Esp = OFFSETOF(psp->saveStack);
return;
} else
TRACE("killing DOS task\n");
}
ExitThread( retval );
}
static void MZ_Launch( LPCSTR cmdtail, int length )
{
TDB *pTask = GlobalLock16( GetCurrentTask() );
BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
DWORD rv;
SYSLEVEL *lock;
MZ_FillPSP(psp_start, cmdtail, length);
pTask->flags |= TDBF_WINOLDAP;
/* DTA is set to PSP:0080h when a program is started. */
pTask->dta = MAKESEGPTR( DOSVM_psp, 0x80 );
GetpWin16Lock( &lock );
_LeaveSysLevel( lock );
ResumeThread(dosvm_thread);
rv = DOSVM_Loop(dosvm_thread);
CloseHandle(dosvm_thread);
dosvm_thread = 0; dosvm_tid = 0;
CloseHandle(loop_thread);
loop_thread = 0; loop_tid = 0;
VGA_Clean();
ExitProcess(rv);
}
static DWORD MZ_Launch( LPCSTR cmdtail, int length )
{
TDB *pTask = GlobalLock16( GetCurrentTask() );
BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
DWORD rv;
SYSLEVEL *lock;
MSG msg;
MZ_FillPSP(psp_start, cmdtail, length);
pTask->flags |= TDBF_WINOLDAP;
/* DTA is set to PSP:0080h when a program is started. */
pTask->dta = MAKESEGPTR( DOSVM_psp, 0x80 );
GetpWin16Lock( &lock );
_LeaveSysLevel( lock );
/* force the message queue to be created */
PeekMessageW(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
ResumeThread(dosvm_thread);
rv = DOSVM_Loop(dosvm_thread);
CloseHandle(dosvm_thread);
dosvm_thread = 0; dosvm_tid = 0;
CloseHandle(loop_thread);
loop_thread = 0; loop_tid = 0;
if (rv) return rv;
VGA_Clean();
ExitProcess(0);
}
void DOSDEV_SetupDevice(const WINEDEV * devinfo,
WORD seg, WORD off_dev, WORD off_thunk)
{
DOS_DEVICE_HEADER *dev = PTR_REAL_TO_LIN(seg, off_dev);
WINEDEV_THUNK *thunk = PTR_REAL_TO_LIN(seg, off_thunk);
DOS_DATASEG *dataseg = (DOS_DATASEG*)DOSMEM_LOL();
dev->attr = devinfo->attr;
dev->strategy = off_thunk + FIELD_OFFSET(WINEDEV_THUNK, ljmp1);
dev->interrupt = off_thunk + FIELD_OFFSET(WINEDEV_THUNK, ljmp2);
memcpy(dev->name, devinfo->name, 8);
thunk->ljmp1 = LJMP;
thunk->strategy = DPMI_AllocInternalRMCB(devinfo->strategy);
thunk->ljmp2 = LJMP;
thunk->interrupt = DPMI_AllocInternalRMCB(devinfo->interrupt);
dev->next_dev = NONEXT;
if (dataseg->last_dev)
dataseg->last_dev->next_dev = MAKESEGPTR(seg, off_dev);
dataseg->last_dev = dev;
}
DWORD DOSDEV_FindCharDevice(char*name)
{
SEGPTR cur_ptr = MAKESEGPTR(HIWORD(DOS_LOLSeg), FIELD_OFFSET(DOS_LISTOFLISTS,NUL_dev));
DOS_DEVICE_HEADER *cur = PTR_REAL_TO_LIN(SELECTOROF(cur_ptr),OFFSETOF(cur_ptr));
char dname[8];
int cnt;
/* get first 8 characters */
/* if less than 8 characters, pad with spaces */
for (cnt=0; name[cnt] && cnt<8; cnt++)
dname[cnt]=name[cnt];
while(cnt<8) dname[cnt++] = ' ';
/* search for char devices with the right name */
while (cur &&
((!(cur->attr & ATTR_CHAR)) ||
memcmp(cur->name,dname,8))) {
cur_ptr = cur->next_dev;
if (cur_ptr == NONEXT) cur=NULL;
else cur = PTR_REAL_TO_LIN(SELECTOROF(cur_ptr),OFFSETOF(cur_ptr));
}
return cur_ptr;
}
static void DOSDEV_DoReq(void*req, DWORD dev)
{
REQUEST_HEADER *hdr = (REQUEST_HEADER *)req;
DOS_DEVICE_HEADER *dhdr;
CONTEXT86 ctx;
char *phdr;
dhdr = PTR_REAL_TO_LIN(SELECTOROF(dev),OFFSETOF(dev));
phdr = ((char*)DOSMEM_LOL()) + DOS_DATASEG_OFF(req);
/* copy request to request scratch area */
memcpy(phdr, req, hdr->size);
/* prepare to call device driver */
memset(&ctx, 0, sizeof(ctx));
ctx.EFlags |= V86_FLAG;
/* ES:BX points to request for strategy routine */
ctx.SegEs = HIWORD(DOS_LOLSeg);
ctx.Ebx = DOS_DATASEG_OFF(req);
/* call strategy routine */
ctx.SegCs = SELECTOROF(dev);
ctx.Eip = dhdr->strategy;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* call interrupt routine */
ctx.SegCs = SELECTOROF(dev);
ctx.Eip = dhdr->interrupt;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* completed, copy request back */
memcpy(req, phdr, hdr->size);
if (hdr->status & STAT_ERROR) {
switch (hdr->status & STAT_MASK) {
case 0x0F: /* invalid disk change */
/* this error seems to fit the bill */
SetLastError(ERROR_NOT_SAME_DEVICE);
break;
default:
SetLastError((hdr->status & STAT_MASK) + 0x13);
break;
}
}
}
/**********************************************************************
* EMS_map_multiple
*
* Map multiple logical pages into physical pages.
*/
static void EMS_map_multiple( CONTEXT86 *context )
{
WORD *ptr = PTR_REAL_TO_LIN(context->SegDs, SI_reg(context));
BYTE status = 0;
int i;
for(i=0; i<CX_reg(context) && !status; i++, ptr += 2)
switch(AL_reg(context)) {
case 0x00:
status = EMS_map( ptr[1],
DX_reg(context), ptr[0] );
break;
case 0x01:
status = EMS_map( (ptr[1] - EMS_record->frame_selector) >> 10,
DX_reg(context), ptr[0] );
break;
default:
status = 0x8f; /* status: undefined subfunction */
}
SET_AH( context, status );
}
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(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address)));
HeapFree(GetProcessHeap(), 0, CurrRMCB);
return 0;
}
return 1;
}
static BYTE * XMS_Offset( MOVEOFS *ofs )
{
if (ofs->Handle) return (BYTE*)GlobalLock16(ofs->Handle)+ofs->Offset;
else return (BYTE*)PTR_REAL_TO_LIN(SELECTOROF(ofs->Offset),OFFSETOF(ofs->Offset));
}
static struct _DOS_LISTOFLISTS * DOSMEM_LOL(void)
{
return PTR_REAL_TO_LIN(HIWORD(DOS_LOLSeg),0);
}
/***********************************************************************
* MZ_Exec
*
* this may only be called from existing DOS processes
*/
BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk )
{
DWORD binType;
STARTUPINFOA st;
PROCESS_INFORMATION pe;
HANDLE hFile;
BOOL ret = FALSE;
if(!GetBinaryTypeA(filename, &binType)) /* determine what kind of binary this is */
{
return FALSE; /* binary is not an executable */
}
/* handle non-dos executables */
if(binType != SCS_DOS_BINARY)
{
if(func == 0) /* load and execute */
{
LPSTR fullCmdLine;
WORD fullCmdLength;
LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
PDB16 *psp = (PDB16 *)psp_start;
ExecBlock *blk = (ExecBlock *)paramblk;
LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
LPBYTE envblock = PTR_REAL_TO_LIN(psp->environment, 0);
int cmdLength = cmdline[0];
/*
* If cmdLength is 127, command tail is truncated and environment
* variable CMDLINE should contain full command line
* (this includes filename).
*/
if (cmdLength == 127)
{
FIXME( "CMDLINE argument passing is unimplemented.\n" );
cmdLength = 126; /* FIXME */
}
fullCmdLength = (strlen(filename) + 1) + cmdLength + 1; /* filename + space + cmdline + terminating null character */
fullCmdLine = HeapAlloc(GetProcessHeap(), 0, fullCmdLength);
if(!fullCmdLine) return FALSE; /* return false on memory alloc failure */
/* build the full command line from the executable file and the command line being passed in */
snprintf(fullCmdLine, fullCmdLength, "%s ", filename); /* start off with the executable filename and a space */
memcpy(fullCmdLine + strlen(fullCmdLine), cmdline + 1, cmdLength); /* append cmdline onto the end */
fullCmdLine[fullCmdLength - 1] = 0; /* null terminate string */
ZeroMemory (&st, sizeof(STARTUPINFOA));
st.cb = sizeof(STARTUPINFOA);
ret = CreateProcessA (NULL, fullCmdLine, NULL, NULL, TRUE, 0, envblock, NULL, &st, &pe);
/* wait for the app to finish and clean up PROCESS_INFORMATION handles */
if(ret)
{
WaitForSingleObject(pe.hProcess, INFINITE); /* wait here until the child process is complete */
CloseHandle(pe.hProcess);
CloseHandle(pe.hThread);
}
HeapFree(GetProcessHeap(), 0, fullCmdLine); /* free the memory we allocated */
}
else
{
FIXME("EXEC type of %d not implemented for non-dos executables\n", func);
ret = FALSE;
}
return ret;
} /* if(binType != SCS_DOS_BINARY) */
/* handle dos executables */
hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, 0);
if (hFile == INVALID_HANDLE_VALUE) return FALSE;
switch (func) {
case 0: /* load and execute */
case 1: /* load but don't execute */
{
/* save current process's return SS:SP now */
LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
PDB16 *psp = (PDB16 *)psp_start;
psp->saveStack = (DWORD)MAKESEGPTR(context->SegSs, LOWORD(context->Esp));
}
ret = MZ_DoLoadImage( hFile, filename, NULL, ((ExecBlock *)paramblk)->env_seg );
if (ret) {
/* MZ_LoadImage created a new PSP and loaded new values into it,
* let's work on the new values now */
LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
ExecBlock *blk = (ExecBlock *)paramblk;
LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
/* First character contains the length of the command line. */
MZ_FillPSP(psp_start, (LPSTR)cmdline + 1, cmdline[0]);
/* the lame MS-DOS engineers decided that the return address should be in int22 */
DOSVM_SetRMHandler(0x22, (FARPROC16)MAKESEGPTR(context->SegCs, LOWORD(context->Eip)));
if (func) {
/* don't execute, just return startup state */
/*
* From Ralph Brown:
* For function 01h, the AX value to be passed to the child program
* is put on top of the child's stack
*/
LPBYTE stack;
init_sp -= 2;
stack = (LPBYTE) CTX_SEG_OFF_TO_LIN(context, init_ss, init_sp);
/* FIXME: push AX correctly */
stack[0] = 0x00; /* push AL */
stack[1] = 0x00; /* push AH */
blk->init_cs = init_cs;
blk->init_ip = init_ip;
blk->init_ss = init_ss;
blk->init_sp = init_sp;
} else {
/* execute by making us return to new process */
context->SegCs = init_cs;
context->Eip = init_ip;
context->SegSs = init_ss;
context->Esp = init_sp;
context->SegDs = DOSVM_psp;
context->SegEs = DOSVM_psp;
context->Eax = 0;
}
}
break;
case 3: /* load overlay */
{
OverlayBlock *blk = (OverlayBlock *)paramblk;
ret = MZ_DoLoadImage( hFile, filename, blk, 0);
}
break;
default:
FIXME("EXEC load type %d not implemented\n", func);
SetLastError(ERROR_INVALID_FUNCTION);
break;
}
CloseHandle(hFile);
return ret;
}
static BOOL MZ_DoLoadImage( HANDLE hFile, LPCSTR filename, OverlayBlock *oblk, WORD par_env_seg )
{
IMAGE_DOS_HEADER mz_header;
DWORD image_start,image_size,min_size,max_size,avail;
BYTE*psp_start,*load_start;
LPSTR oldenv = 0;
int x, old_com=0, alloc;
SEGPTR reloc;
WORD env_seg, load_seg, rel_seg, oldpsp_seg;
DWORD len;
if (DOSVM_psp) {
/* DOS process already running, inherit from it */
PDB16* par_psp;
alloc=0;
oldpsp_seg = DOSVM_psp;
if( !par_env_seg) {
par_psp = (PDB16*)((DWORD)DOSVM_psp << 4);
oldenv = (LPSTR)((DWORD)par_psp->environment << 4);
}
} else {
/* allocate new DOS process, inheriting from Wine environment */
alloc=1;
oldpsp_seg = 0;
if( !par_env_seg)
oldenv = GetEnvironmentStringsA();
}
SetFilePointer(hFile,0,NULL,FILE_BEGIN);
if ( !ReadFile(hFile,&mz_header,sizeof(mz_header),&len,NULL)
|| len != sizeof(mz_header)
|| mz_header.e_magic != IMAGE_DOS_SIGNATURE) {
char *p = strrchr( filename, '.' );
if (!p || strcasecmp( p, ".com" )) /* check for .COM extension */
{
SetLastError(ERROR_BAD_FORMAT);
goto load_error;
}
old_com=1; /* assume .COM file */
image_start=0;
image_size=GetFileSize(hFile,NULL);
min_size=0x10000; max_size=0x100000;
mz_header.e_crlc=0;
mz_header.e_ss=0; mz_header.e_sp=0xFFFE;
mz_header.e_cs=0; mz_header.e_ip=0x100;
} else {
/* calculate load size */
image_start=mz_header.e_cparhdr<<4;
image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
/* From Ralf Brown Interrupt List: If the word at offset 02h is 4, it should
* be treated as 00h, since pre-1.10 versions of the MS linker set it that
* way. */
if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
image_size-=image_start;
min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
max_size=image_size+((DWORD)mz_header.e_maxalloc<<4)+(PSP_SIZE<<4);
}
if (alloc) MZ_InitMemory();
if (oblk) {
/* load overlay into preallocated memory */
load_seg=oblk->load_seg;
rel_seg=oblk->rel_seg;
load_start=(LPBYTE)((DWORD)load_seg<<4);
} else {
/* allocate environment block */
if( par_env_seg)
env_seg = par_env_seg;
else
env_seg=MZ_InitEnvironment(oldenv, filename);
if( alloc && oldenv)
FreeEnvironmentStringsA( oldenv);
/* allocate memory for the executable */
TRACE("Allocating DOS memory (min=%ld, max=%ld)\n",min_size,max_size);
avail=DOSMEM_Available();
if (avail<min_size) {
ERR("insufficient DOS memory\n");
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
goto load_error;
}
if (avail>max_size) avail=max_size;
psp_start=DOSMEM_AllocBlock(avail,&DOSVM_psp);
if (!psp_start) {
ERR("error allocating DOS memory\n");
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
goto load_error;
}
load_seg=DOSVM_psp+(old_com?0:PSP_SIZE);
rel_seg=load_seg;
load_start=psp_start+(PSP_SIZE<<4);
MZ_CreatePSP(psp_start, env_seg, oldpsp_seg);
}
/* load executable image */
TRACE("loading DOS %s image, %08lx bytes\n",old_com?"COM":"EXE",image_size);
SetFilePointer(hFile,image_start,NULL,FILE_BEGIN);
if (!ReadFile(hFile,load_start,image_size,&len,NULL) || len != image_size) {
/* check if this is due to the workaround for the pre-1.10 MS linker and we
realy had only 4 bytes on the last page */
if (mz_header.e_cblp != 4 || image_size - len != 512 - 4) {
SetLastError(ERROR_BAD_FORMAT);
goto load_error;
}
}
if (mz_header.e_crlc) {
/* load relocation table */
TRACE("loading DOS EXE relocation table, %d entries\n",mz_header.e_crlc);
/* FIXME: is this too slow without read buffering? */
SetFilePointer(hFile,mz_header.e_lfarlc,NULL,FILE_BEGIN);
for (x=0; x<mz_header.e_crlc; x++) {
if (!ReadFile(hFile,&reloc,sizeof(reloc),&len,NULL) || len != sizeof(reloc)) {
SetLastError(ERROR_BAD_FORMAT);
goto load_error;
}
*(WORD*)SEGPTR16(load_start,reloc)+=rel_seg;
}
}
if (!oblk) {
init_cs = load_seg+mz_header.e_cs;
init_ip = mz_header.e_ip;
init_ss = load_seg+mz_header.e_ss;
init_sp = mz_header.e_sp;
if (old_com){
/* .COM files exit with ret. Make sure they jump to psp start (=int 20) */
WORD* stack = PTR_REAL_TO_LIN(init_ss, init_sp);
*stack = 0;
}
TRACE("entry point: %04x:%04x\n",init_cs,init_ip);
}
if (alloc && !MZ_InitTask()) {
SetLastError(ERROR_GEN_FAILURE);
return FALSE;
}
return TRUE;
load_error:
DOSVM_psp = oldpsp_seg;
return FALSE;
}
