/***********************************************************************
* MakeProcInstance (KERNEL.51)
*/
FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
{
struct thunk *thunk;
BYTE *lfunc;
SEGPTR thunkaddr;
WORD hInstanceSelector;
hInstanceSelector = GlobalHandleToSel16(hInstance);
TRACE("(%p, %04x);\n", func, hInstance);
if (!HIWORD(func)) {
/* Win95 actually protects via SEH, but this is better for debugging */
WARN("Ouch ! Called with invalid func %p !\n", func);
return NULL;
}
if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
&& (hInstance != 0)
&& (hInstance != 0xffff) )
{
/* calling MPI with a foreign DSEG is invalid ! */
WARN("Problem with hInstance? Got %04x, using %04x instead\n",
hInstance,CURRENT_DS);
}
/* Always use the DSEG that MPI was entered with.
* We used to set hInstance to GetTaskDS16(), but this should be wrong
* as CURRENT_DS provides the DSEG value we need.
* ("calling" DS, *not* "task" DS !) */
hInstanceSelector = CURRENT_DS;
hInstance = GlobalHandle16(hInstanceSelector);
/* no thunking for DLLs */
if (NE_GetPtr(FarGetOwner16(hInstance))->ne_flags & NE_FFLAGS_LIBMODULE)
return func;
thunkaddr = TASK_AllocThunk();
if (!thunkaddr) return NULL;
thunk = MapSL( thunkaddr );
lfunc = MapSL( (SEGPTR)func );
TRACE("(%p,%04x): got thunk %08x\n", func, hInstance, thunkaddr );
if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
) {
WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
}
thunk->movw = 0xb8; /* movw instance, %ax */
thunk->instance = hInstanceSelector;
thunk->ljmp = 0xea; /* ljmp func */
thunk->func = func;
return (FARPROC16)thunkaddr;
/* CX reg indicates if thunkaddr != NULL, implement if needed */
}
/**********************************************************************
* GetCodeInfo (KERNEL.104)
*/
BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
{
NE_MODULE *pModule;
SEGTABLEENTRY *pSeg;
int segNr;
if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
return FALSE;
/* Fill in segment information */
segInfo->offSegment = pSeg->filepos;
segInfo->cbSegment = pSeg->size;
segInfo->flags = pSeg->flags;
segInfo->cbAlloc = pSeg->minsize;
segInfo->h = pSeg->hSeg;
segInfo->alignShift = pModule->ne_align;
if ( segNr == pModule->ne_autodata )
segInfo->cbAlloc += pModule->ne_heap + pModule->ne_stack;
/* Return module handle in %es */
CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
return TRUE;
}
/***********************************************************************
* GetTaskDS (KERNEL.155)
*
* Note: this function apparently returns a DWORD with LOWORD == HIWORD.
* I don't think we need to bother with this.
*/
HINSTANCE16 WINAPI GetTaskDS16(void)
{
TDB *pTask;
if (!(pTask = TASK_GetCurrent())) return 0;
return GlobalHandleToSel16(pTask->hInstance);
}
/***********************************************************************
* TaskNext (TOOLHELP.64)
*/
BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
{
TDB *pTask;
INSTANCEDATA *pInstData;
TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
if (!lpte->hNext) return FALSE;
/* make sure that task and hInstance are valid (skip initial Wine task !) */
while (1) {
pTask = TASK_GetPtr( lpte->hNext );
if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
if (pTask->hInstance)
break;
lpte->hNext = pTask->hNext;
}
pInstData = MapSL( MAKESEGPTR( GlobalHandleToSel16(pTask->hInstance), 0 ) );
lpte->hTask = lpte->hNext;
lpte->hTaskParent = pTask->hParent;
lpte->hInst = pTask->hInstance;
lpte->hModule = pTask->hModule;
lpte->wSS = SELECTOROF( pTask->teb->WOW32Reserved );
lpte->wSP = OFFSETOF( pTask->teb->WOW32Reserved );
lpte->wStackTop = pInstData->stacktop;
lpte->wStackMinimum = pInstData->stackmin;
lpte->wStackBottom = pInstData->stackbottom;
lpte->wcEvents = pTask->nEvents;
lpte->hQueue = pTask->hQueue;
lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
lpte->wPSPOffset = 0x100; /*??*/
lpte->hNext = pTask->hNext;
return TRUE;
}
/***********************************************************************
* InitTask (KERNEL.91)
*
* Called by the application startup code.
*/
void WINAPI InitTask16( CONTEXT *context )
{
TDB *pTask;
INSTANCEDATA *pinstance;
SEGPTR ptr;
context->Eax = 0;
if (!(pTask = TASK_GetCurrent())) return;
/* Note: we need to trust that BX/CX contain the stack/heap sizes,
as some apps, notably Visual Basic apps, *modify* the heap/stack
size of the instance data segment before calling InitTask() */
/* Initialize the INSTANCEDATA structure */
pinstance = MapSL( MAKESEGPTR(CURRENT_DS, 0) );
pinstance->stackmin = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + sizeof( STACK16FRAME );
pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
/* Initialize the local heap */
if (LOWORD(context->Ecx))
LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
/* Initialize implicitly loaded DLLs */
NE_InitializeDLLs( pTask->hModule );
NE_DllProcessAttach( pTask->hModule );
/* Registers on return are:
* ax 1 if OK, 0 on error
* cx stack limit in bytes
* dx cmdShow parameter
* si instance handle of the previous instance
* di instance handle of the new task
* es:bx pointer to command line inside PSP
*
* 0 (=%bp) is pushed on the stack
*/
ptr = stack16_push( sizeof(WORD) );
*(WORD *)MapSL(ptr) = 0;
context->Esp -= 2;
context->Eax = 1;
if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
else
{
LPBYTE p = &pTask->pdb.cmdLine[1];
while ((*p == ' ') || (*p == '\t')) p++;
context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
}
context->Ecx = pinstance->stacktop;
context->Edx = pTask->nCmdShow;
context->Esi = (DWORD)pTask->hPrevInstance;
context->Edi = (DWORD)pTask->hInstance;
context->SegEs = (WORD)pTask->hPDB;
}
/***********************************************************************
* KERNEL thread initialisation routine
*/
static void thread_attach(void)
{
/* allocate the 16-bit stack (FIXME: should be done lazily) */
HGLOBAL16 hstack = WOWGlobalAlloc16( GMEM_FIXED, 0x10000 );
kernel_get_thread_data()->stack_sel = GlobalHandleToSel16( hstack );
NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR( kernel_get_thread_data()->stack_sel,
0x10000 - sizeof(STACK16FRAME) );
memset( (char *)GlobalLock16(hstack) + 0x10000 - sizeof(STACK16FRAME), 0, sizeof(STACK16FRAME) );
}
/***********************************************************************
* GetDummyModuleHandleDS (KERNEL.602)
*/
WORD WINAPI GetDummyModuleHandleDS16(void)
{
TDB *pTask;
WORD selector;
if (!(pTask = TASK_GetCurrent())) return 0;
if (!(pTask->flags & TDBF_WIN32)) return 0;
selector = GlobalHandleToSel16( pTask->hModule );
CURRENT_DS = selector;
return selector;
}
/**********************************************************************
* TASK_GetCodeSegment
*
* Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
* and logical segment number of a given code segment.
*
* 'proc' either *is* already a pair of module handle and segment number,
* in which case there's nothing to do. Otherwise, it is a pointer to
* a function, and we need to retrieve the code segment. If the pointer
* happens to point to a thunk, we'll retrieve info about the code segment
* where the function pointed to by the thunk resides, not the thunk itself.
*
* FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
* the function the snoop code will return to ...
*
*/
static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
SEGTABLEENTRY **ppSeg, int *pSegNr )
{
NE_MODULE *pModule = NULL;
SEGTABLEENTRY *pSeg = NULL;
int segNr=0;
/* Try pair of module handle / segment number */
pModule = GlobalLock16( HIWORD( proc ) );
if ( pModule && pModule->ne_magic == IMAGE_OS2_SIGNATURE )
{
segNr = LOWORD( proc );
if ( segNr && segNr <= pModule->ne_cseg )
pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
}
/* Try thunk or function */
else
{
BYTE *thunk = MapSL( (SEGPTR)proc );
WORD selector;
if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
selector = thunk[6] + (thunk[7] << 8);
else
selector = HIWORD( proc );
pModule = NE_GetPtr( GlobalHandle16( selector ) );
pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
if ( pModule )
for ( segNr = 1; segNr <= pModule->ne_cseg; segNr++, pSeg++ )
if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
break;
if ( pModule && segNr > pModule->ne_cseg )
pSeg = NULL;
}
/* Abort if segment not found */
if ( !pModule || !pSeg )
return FALSE;
/* Return segment data */
if ( ppModule ) *ppModule = pModule;
if ( ppSeg ) *ppSeg = pSeg;
if ( pSegNr ) *pSegNr = segNr;
return TRUE;
}
/***********************************************************************
* TASK_Create
*
* NOTE: This routine might be called by a Win32 thread. Thus, we need
* to be careful to protect global data structures. We do this
* by entering the Win16Lock while linking the task into the
* global task list.
*/
static TDB *TASK_Create( NE_MODULE *pModule, UINT16 cmdShow, LPCSTR cmdline, BYTE len )
{
HTASK16 hTask;
TDB *pTask;
FARPROC16 proc;
char curdir[MAX_PATH];
HMODULE16 hModule = pModule ? pModule->self : 0;
/* Allocate the task structure */
hTask = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB) );
if (!hTask) return NULL;
pTask = TASK_GetPtr( hTask );
FarSetOwner16( hTask, hModule );
/* Fill the task structure */
pTask->hSelf = hTask;
pTask->version = pModule ? pModule->ne_expver : 0x0400;
pTask->hModule = hModule;
pTask->hParent = GetCurrentTask();
pTask->magic = TDB_MAGIC;
pTask->nCmdShow = cmdShow;
GetCurrentDirectoryA( sizeof(curdir), curdir );
GetShortPathNameA( curdir, curdir, sizeof(curdir) );
pTask->curdrive = (curdir[0] - 'A') | 0x80;
lstrcpynA( pTask->curdir, curdir + 2, sizeof(pTask->curdir) );
/* Create the thunks block */
TASK_CreateThunks( hTask, (char *)pTask->thunks - (char *)pTask, 7 );
/* Copy the module name */
if (hModule)
{
char name[sizeof(pTask->module_name)+1];
size_t len;
GetModuleName16( hModule, name, sizeof(name) );
len = strlen(name) + 1;
memcpy(pTask->module_name, name, min(len,sizeof(pTask->module_name)));
pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
}
/* Allocate a selector for the PDB */
pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
hModule, WINE_LDT_FLAGS_DATA );
/* Fill the PDB */
pTask->pdb.int20 = 0x20cd;
pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
proc = GetProcAddress16( GetModuleHandle16("KERNEL"), "DOS3Call" );
memcpy( &pTask->pdb.dispatcher[1], &proc, sizeof(proc) );
pTask->pdb.savedint22 = 0;
pTask->pdb.savedint23 = 0;
pTask->pdb.savedint24 = 0;
pTask->pdb.fileHandlesPtr =
MAKESEGPTR( GlobalHandleToSel16(pTask->hPDB), FIELD_OFFSET( PDB16, fileHandles ));
pTask->pdb.hFileHandles = 0;
memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
/* FIXME: should we make a copy of the environment? */
pTask->pdb.environment = SELECTOROF(GetDOSEnvironment16());
pTask->pdb.nbFiles = 20;
/* Fill the command line */
if (!cmdline)
{
cmdline = GetCommandLineA();
/* remove the first word (program name) */
if (*cmdline == '"')
if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = GetCommandLineA();
while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
len = strlen(cmdline);
}
if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
pTask->pdb.cmdLine[0] = len;
memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
/* pTask->pdb.cmdLine[len+1] = 0; */
TRACE("cmdline='%.*s' task=%04x\n", len, cmdline, hTask );
/* Allocate a code segment alias for the TDB */
pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, pTask, sizeof(TDB),
pTask->hPDB, WINE_LDT_FLAGS_CODE );
/* Default DTA overwrites command line */
pTask->dta = MAKESEGPTR( pTask->hPDB, FIELD_OFFSET( PDB16, cmdLine ));
/* Create scheduler event for 16-bit tasks */
if ( !(pTask->flags & TDBF_WIN32) )
NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE );
if (!initial_task) initial_task = hTask;
return pTask;
}
/***********************************************************************
* GetTaskQueueES (KERNEL.119)
*/
void WINAPI GetTaskQueueES16(void)
{
CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
}
void WINAPI SNOOP16_Entry(FARPROC proc, LPBYTE args, CONTEXT86 *context) {
DWORD ordinal=0;
DWORD entry=(DWORD)MapSL( MAKESEGPTR(context->SegCs,LOWORD(context->Eip)) )-5;
WORD xcs = context->SegCs;
SNOOP16_DLL *dll = firstdll;
SNOOP16_FUN *fun = NULL;
SNOOP16_RETURNENTRIES **rets = &firstrets;
SNOOP16_RETURNENTRY *ret;
unsigned i=0;
int max;
while (dll) {
if (xcs == dll->funhandle) {
fun = (SNOOP16_FUN*)entry;
ordinal = fun-dll->funs;
break;
}
dll=dll->next;
}
if (!dll) {
FIXME("entrypoint 0x%08x not found\n",entry);
return; /* oops */
}
while (*rets) {
for (i=0;i<sizeof((*rets)->entry)/sizeof((*rets)->entry[0]);i++)
if (!(*rets)->entry[i].origreturn)
break;
if (i!=sizeof((*rets)->entry)/sizeof((*rets)->entry[0]))
break;
rets = &((*rets)->next);
}
if (!*rets) {
HANDLE16 hand = GlobalHandleToSel16(GLOBAL_Alloc(GMEM_ZEROINIT,65535,0,WINE_LDT_FLAGS_CODE));
*rets = GlobalLock16(hand);
(*rets)->rethandle = hand;
i = 0; /* entry 0 is free */
}
ret = &((*rets)->entry[i]);
ret->lcall = 0x9a;
ret->snr = MAKELONG(sizeof(SNOOP16_RELAY),xsnr);
ret->origreturn = (FARPROC16)CALLER1REF;
CALLER1REF = MAKELONG((char*)&(ret->lcall)-(char*)((*rets)->entry),(*rets)->rethandle);
ret->dll = dll;
ret->args = NULL;
ret->ordinal = ordinal;
ret->origSP = LOWORD(context->Esp);
context->Eip= LOWORD(fun->origfun);
context->SegCs = HIWORD(fun->origfun);
DPRINTF("%04x:CALL %s.%d: %s(",GetCurrentThreadId(), dll->name,ordinal,fun->name);
if (fun->nrofargs>0) {
max = fun->nrofargs;
if (max>16) max=16;
for (i=max;i--;)
DPRINTF("%04x%s",*(WORD*)((char *) MapSL( MAKESEGPTR(context->SegSs,LOWORD(context->Esp)) )+8+sizeof(WORD)*i),i?",":"");
if (max!=fun->nrofargs)
DPRINTF(" ...");
} else if (fun->nrofargs<0) {
DPRINTF("<unknown, check return>");
ret->args = HeapAlloc(GetProcessHeap(),0,16*sizeof(WORD));
memcpy(ret->args,(LPBYTE)((char *) MapSL( MAKESEGPTR(context->SegSs,LOWORD(context->Esp)) )+8),sizeof(WORD)*16);
}
DPRINTF(") ret=%04x:%04x\n",HIWORD(ret->origreturn),LOWORD(ret->origreturn));
}
void
SNOOP16_RegisterDLL(HMODULE16 hModule,LPCSTR name) {
SNOOP16_DLL **dll = &(firstdll);
char *s;
if (!TRACE_ON(snoop)) return;
TRACE("hmod=%x, name=%s\n", hModule, name);
if (!snr) {
xsnr=GLOBAL_Alloc(GMEM_ZEROINIT,2*sizeof(*snr),0,WINE_LDT_FLAGS_CODE|WINE_LDT_FLAGS_32BIT);
snr = GlobalLock16(xsnr);
snr[0].pushbp = 0x5566;
snr[0].pusheax = 0x50;
snr[0].pushax = 0x5066;
snr[0].pushl = 0x68;
snr[0].realfun = (DWORD)SNOOP16_Entry;
snr[0].lcall = 0x9a;
snr[0].callfromregs = (DWORD)__wine_call_from_16_regs;
snr[0].seg = wine_get_cs();
snr[0].lret = 0xcb66;
snr[1].pushbp = 0x5566;
snr[1].pusheax = 0x50;
snr[1].pushax = 0x5066;
snr[1].pushl = 0x68;
snr[1].realfun = (DWORD)SNOOP16_Return;
snr[1].lcall = 0x9a;
snr[1].callfromregs = (DWORD)__wine_call_from_16_regs;
snr[1].seg = wine_get_cs();
snr[1].lret = 0xcb66;
}
while (*dll) {
if ((*dll)->hmod == hModule)
{
/* another dll, loaded at the same address */
GlobalUnlock16((*dll)->funhandle);
GlobalFree16((*dll)->funhandle);
break;
}
dll = &((*dll)->next);
}
if (*dll)
*dll = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, *dll, sizeof(SNOOP16_DLL)+strlen(name));
else
*dll = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SNOOP16_DLL)+strlen(name));
(*dll)->next = NULL;
(*dll)->hmod = hModule;
if ((s=strrchr(name,'\\')))
name = s+1;
strcpy( (*dll)->name, name );
if ((s=strrchr((*dll)->name,'.')))
*s='\0';
(*dll)->funhandle = GlobalHandleToSel16(GLOBAL_Alloc(GMEM_ZEROINIT,65535,0,WINE_LDT_FLAGS_CODE));
(*dll)->funs = GlobalLock16((*dll)->funhandle);
if (!(*dll)->funs) {
HeapFree(GetProcessHeap(),0,*dll);
FIXME("out of memory\n");
return;
}
}
