4 * Copyright 1995 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
36 #include "wine/winbase16.h"
43 #include "selectors.h"
44 #include "wine/server.h"
46 #include "stackframe.h"
51 #include "wine/debug.h"
53 WINE_DEFAULT_DEBUG_CHANNEL(task);
54 WINE_DECLARE_DEBUG_CHANNEL(relay);
55 WINE_DECLARE_DEBUG_CHANNEL(toolhelp);
57 /* Min. number of thunks allocated when creating a new segment */
61 static THHOOK DefaultThhook;
62 THHOOK *pThhook = &DefaultThhook;
64 #define hCurrentTask (pThhook->CurTDB)
65 #define hFirstTask (pThhook->HeadTDB)
66 #define hLockedTask (pThhook->LockTDB)
68 static UINT16 nTaskCount = 0;
70 static HTASK16 initial_task;
72 /***********************************************************************
75 void TASK_InstallTHHook( THHOOK *pNewThhook )
77 THHOOK *pOldThhook = pThhook;
79 pThhook = pNewThhook? pNewThhook : &DefaultThhook;
81 *pThhook = *pOldThhook;
84 /***********************************************************************
87 HTASK16 TASK_GetNextTask( HTASK16 hTask )
89 TDB* pTask = TASK_GetPtr( hTask );
91 if (pTask->hNext) return pTask->hNext;
92 return (hFirstTask != hTask) ? hFirstTask : 0;
96 /***********************************************************************
99 TDB *TASK_GetPtr( HTASK16 hTask )
101 return GlobalLock16( hTask );
105 /***********************************************************************
108 TDB *TASK_GetCurrent(void)
110 return TASK_GetPtr( GetCurrentTask() );
114 /***********************************************************************
117 static void TASK_LinkTask( HTASK16 hTask )
122 if (!(pTask = TASK_GetPtr( hTask ))) return;
123 prevTask = &hFirstTask;
126 TDB *prevTaskPtr = TASK_GetPtr( *prevTask );
127 if (prevTaskPtr->priority >= pTask->priority) break;
128 prevTask = &prevTaskPtr->hNext;
130 pTask->hNext = *prevTask;
136 /***********************************************************************
139 static void TASK_UnlinkTask( HTASK16 hTask )
144 prevTask = &hFirstTask;
145 while (*prevTask && (*prevTask != hTask))
147 pTask = TASK_GetPtr( *prevTask );
148 prevTask = &pTask->hNext;
152 pTask = TASK_GetPtr( *prevTask );
153 *prevTask = pTask->hNext;
160 /***********************************************************************
163 * Create a thunk free-list in segment 'handle', starting from offset 'offset'
164 * and containing 'count' entries.
166 static void TASK_CreateThunks( HGLOBAL16 handle, WORD offset, WORD count )
172 pThunk = (THUNKS *)((BYTE *)GlobalLock16( handle ) + offset);
174 pThunk->magic = THUNK_MAGIC;
175 pThunk->free = (int)&pThunk->thunks - (int)pThunk;
177 for (i = 0; i < count-1; i++)
179 free += 8; /* Offset of next thunk */
180 pThunk->thunks[4*i] = free;
182 pThunk->thunks[4*i] = 0; /* Last thunk */
186 /***********************************************************************
189 * Allocate a thunk for MakeProcInstance().
191 static SEGPTR TASK_AllocThunk(void)
197 if (!(pTask = TASK_GetCurrent())) return 0;
198 sel = pTask->hCSAlias;
199 pThunk = &pTask->thunks;
200 base = (int)pThunk - (int)pTask;
201 while (!pThunk->free)
204 if (!sel) /* Allocate a new segment */
206 sel = GLOBAL_Alloc( GMEM_FIXED, sizeof(THUNKS) + (MIN_THUNKS-1)*8,
207 pTask->hPDB, WINE_LDT_FLAGS_CODE );
208 if (!sel) return (SEGPTR)0;
209 TASK_CreateThunks( sel, 0, MIN_THUNKS );
212 pThunk = (THUNKS *)GlobalLock16( sel );
215 base += pThunk->free;
216 pThunk->free = *(WORD *)((BYTE *)pThunk + pThunk->free);
217 return MAKESEGPTR( sel, base );
221 /***********************************************************************
224 * Free a MakeProcInstance() thunk.
226 static BOOL TASK_FreeThunk( SEGPTR thunk )
232 if (!(pTask = TASK_GetCurrent())) return 0;
233 sel = pTask->hCSAlias;
234 pThunk = &pTask->thunks;
235 base = (int)pThunk - (int)pTask;
236 while (sel && (sel != HIWORD(thunk)))
239 pThunk = (THUNKS *)GlobalLock16( sel );
242 if (!sel) return FALSE;
243 *(WORD *)((BYTE *)pThunk + LOWORD(thunk) - base) = pThunk->free;
244 pThunk->free = LOWORD(thunk) - base;
249 /***********************************************************************
252 * NOTE: This routine might be called by a Win32 thread. Thus, we need
253 * to be careful to protect global data structures. We do this
254 * by entering the Win16Lock while linking the task into the
257 static TDB *TASK_Create( NE_MODULE *pModule, UINT16 cmdShow, TEB *teb, LPCSTR cmdline, BYTE len )
264 /* Allocate the task structure */
266 hTask = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB) );
267 if (!hTask) return NULL;
268 pTask = TASK_GetPtr( hTask );
269 FarSetOwner16( hTask, pModule->self );
271 /* Fill the task structure */
273 pTask->hSelf = hTask;
275 if (teb && teb->tibflags & TEBF_WIN32)
277 pTask->flags |= TDBF_WIN32;
278 pTask->hInstance = pModule->self;
279 pTask->hPrevInstance = 0;
280 /* NOTE: for 16-bit tasks, the instance handles are updated later on
284 pTask->version = pModule->expected_version;
285 pTask->hModule = pModule->self;
286 pTask->hParent = GetCurrentTask();
287 pTask->magic = TDB_MAGIC;
288 pTask->nCmdShow = cmdShow;
290 pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
291 strcpy( pTask->curdir, "\\" );
292 WideCharToMultiByte(CP_ACP, 0, DRIVE_GetDosCwd(DRIVE_GetCurrentDrive()), -1,
293 pTask->curdir + 1, sizeof(pTask->curdir) - 1, NULL, NULL);
294 pTask->curdir[sizeof(pTask->curdir) - 1] = 0; /* ensure 0 termination */
296 /* Create the thunks block */
298 TASK_CreateThunks( hTask, (int)&pTask->thunks - (int)pTask, 7 );
300 /* Copy the module name */
302 GetModuleName16( pModule->self, name, sizeof(name) );
303 strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
305 /* Allocate a selector for the PDB */
307 pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
308 pModule->self, WINE_LDT_FLAGS_DATA );
312 pTask->pdb.int20 = 0x20cd;
313 pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
314 proc = GetProcAddress16( GetModuleHandle16("KERNEL"), "DOS3Call" );
315 memcpy( &pTask->pdb.dispatcher[1], &proc, sizeof(proc) );
316 pTask->pdb.savedint22 = 0;
317 pTask->pdb.savedint23 = 0;
318 pTask->pdb.savedint24 = 0;
319 pTask->pdb.fileHandlesPtr =
320 MAKESEGPTR( GlobalHandleToSel16(pTask->hPDB), (int)&((PDB16 *)0)->fileHandles );
321 pTask->pdb.hFileHandles = 0;
322 memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
323 /* FIXME: should we make a copy of the environment? */
324 pTask->pdb.environment = SELECTOROF(GetDOSEnvironment16());
325 pTask->pdb.nbFiles = 20;
327 /* Fill the command line */
331 cmdline = GetCommandLineA();
332 /* remove the first word (program name) */
334 if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = GetCommandLineA();
335 while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
336 while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
337 len = strlen(cmdline);
339 if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
340 pTask->pdb.cmdLine[0] = len;
341 memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
342 /* pTask->pdb.cmdLine[len+1] = 0; */
344 TRACE("module='%s' cmdline='%.*s' task=%04x\n", name, len, cmdline, hTask );
346 /* Get the compatibility flags */
348 pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
350 /* Allocate a code segment alias for the TDB */
352 pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
353 sizeof(TDB), pTask->hPDB, WINE_LDT_FLAGS_CODE );
355 /* Default DTA overwrites command line */
357 pTask->dta = MAKESEGPTR( pTask->hPDB, (int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
359 /* Create scheduler event for 16-bit tasks */
361 if ( !(pTask->flags & TDBF_WIN32) )
362 NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, TRUE, FALSE );
364 /* Enter task handle into thread */
366 if (teb) teb->htask16 = hTask;
367 if (!initial_task) initial_task = hTask;
373 /***********************************************************************
376 static void TASK_DeleteTask( HTASK16 hTask )
381 if (!(pTask = TASK_GetPtr( hTask ))) return;
384 pTask->magic = 0xdead; /* invalidate signature */
386 /* Free the selector aliases */
388 GLOBAL_FreeBlock( pTask->hCSAlias );
389 GLOBAL_FreeBlock( pTask->hPDB );
391 /* Free the task module */
393 FreeModule16( pTask->hModule );
395 /* Free the task structure itself */
397 GlobalFree16( hTask );
399 /* Free all memory used by this task (including the 32-bit stack, */
400 /* the environment block and the thunk segments). */
402 GlobalFreeAll16( hPDB );
406 /***********************************************************************
407 * TASK_CreateMainTask
409 * Create a task for the main (32-bit) process.
411 void TASK_CreateMainTask(void)
414 STARTUPINFOA startup_info;
415 UINT cmdShow = 1; /* SW_SHOWNORMAL but we don't want to include winuser.h here */
417 GetStartupInfoA( &startup_info );
418 if (startup_info.dwFlags & STARTF_USESHOWWINDOW) cmdShow = startup_info.wShowWindow;
419 pTask = TASK_Create( (NE_MODULE *)GlobalLock16( MapHModuleLS(GetModuleHandleA(0)) ),
420 cmdShow, NtCurrentTeb(), NULL, 0 );
423 ERR("could not create task for main process\n");
427 /* Add the task to the linked list */
428 /* (no need to get the win16 lock, we are the only thread at this point) */
429 TASK_LinkTask( pTask->hSelf );
433 /* startup routine for a new 16-bit thread */
434 static DWORD CALLBACK task_start( TDB *pTask )
438 NtCurrentTeb()->tibflags &= ~TEBF_WIN32;
439 NtCurrentTeb()->htask16 = pTask->hSelf;
442 TASK_LinkTask( pTask->hSelf );
443 pTask->teb = NtCurrentTeb();
444 ret = NE_StartTask();
450 /***********************************************************************
453 * Spawn a new 16-bit task.
455 HTASK16 TASK_SpawnTask( NE_MODULE *pModule, WORD cmdShow,
456 LPCSTR cmdline, BYTE len, HANDLE *hThread )
460 if (!(pTask = TASK_Create( pModule, cmdShow, NULL, cmdline, len ))) return 0;
461 if (!(*hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)task_start, pTask, 0, NULL )))
463 TASK_DeleteTask( pTask->hSelf );
470 /***********************************************************************
473 void TASK_ExitTask(void)
478 /* Enter the Win16Lock to protect global data structures */
481 pTask = TASK_GetCurrent();
488 TRACE("Killing task %04x\n", pTask->hSelf );
490 /* Perform USER cleanup */
492 TASK_CallTaskSignalProc( USIG16_TERMINATION, pTask->hSelf );
493 PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT, 0 );
494 PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
495 PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY, 0 );
497 /* Remove the task from the list to be sure we never switch back to it */
498 TASK_UnlinkTask( pTask->hSelf );
500 if (!nTaskCount || (nTaskCount == 1 && hFirstTask == initial_task))
502 TRACE("this is the last task, exiting\n" );
508 TDB* p = TASK_GetPtr( hFirstTask );
511 if( p->hYieldTo == pTask->hSelf ) p->hYieldTo = 0;
512 p = TASK_GetPtr( p->hNext );
518 if ( hLockedTask == pTask->hSelf )
521 TASK_DeleteTask( pTask->hSelf );
523 /* ... and completely release the Win16Lock, just in case. */
524 ReleaseThunkLock( &lockCount );
528 /***********************************************************************
529 * InitTask (KERNEL.91)
531 * Called by the application startup code.
533 void WINAPI InitTask16( CONTEXT86 *context )
536 INSTANCEDATA *pinstance;
540 if (!(pTask = TASK_GetCurrent())) return;
542 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
543 as some apps, notably Visual Basic apps, *modify* the heap/stack
544 size of the instance data segment before calling InitTask() */
546 /* Initialize the INSTANCEDATA structure */
547 pinstance = MapSL( MAKESEGPTR(CURRENT_DS, 0) );
548 pinstance->stackmin = OFFSETOF( pTask->teb->cur_stack ) + sizeof( STACK16FRAME );
549 pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
550 pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
551 pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
553 /* Initialize the local heap */
554 if (LOWORD(context->Ecx))
555 LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
557 /* Initialize implicitly loaded DLLs */
558 NE_InitializeDLLs( pTask->hModule );
559 NE_DllProcessAttach( pTask->hModule );
561 /* Registers on return are:
562 * ax 1 if OK, 0 on error
563 * cx stack limit in bytes
564 * dx cmdShow parameter
565 * si instance handle of the previous instance
566 * di instance handle of the new task
567 * es:bx pointer to command line inside PSP
569 * 0 (=%bp) is pushed on the stack
571 ptr = stack16_push( sizeof(WORD) );
572 *(WORD *)MapSL(ptr) = 0;
577 if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
580 LPBYTE p = &pTask->pdb.cmdLine[1];
581 while ((*p == ' ') || (*p == '\t')) p++;
582 context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
584 context->Ecx = pinstance->stacktop;
585 context->Edx = pTask->nCmdShow;
586 context->Esi = (DWORD)pTask->hPrevInstance;
587 context->Edi = (DWORD)pTask->hInstance;
588 context->SegEs = (WORD)pTask->hPDB;
592 /***********************************************************************
593 * WaitEvent (KERNEL.30)
595 BOOL16 WINAPI WaitEvent16( HTASK16 hTask )
599 if (!hTask) hTask = GetCurrentTask();
600 pTask = TASK_GetPtr( hTask );
602 if (pTask->flags & TDBF_WIN32)
604 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
608 if (pTask->nEvents > 0)
614 if (pTask->teb == NtCurrentTeb())
618 NtResetEvent( pTask->hEvent, NULL );
619 ReleaseThunkLock( &lockCount );
620 SYSLEVEL_CheckNotLevel( 1 );
621 WaitForSingleObject( pTask->hEvent, INFINITE );
622 RestoreThunkLock( lockCount );
623 if (pTask->nEvents > 0) pTask->nEvents--;
625 else FIXME("for other task %04x cur=%04x\n",pTask->hSelf,GetCurrentTask());
631 /***********************************************************************
632 * PostEvent (KERNEL.31)
634 void WINAPI PostEvent16( HTASK16 hTask )
638 if (!hTask) hTask = GetCurrentTask();
639 if (!(pTask = TASK_GetPtr( hTask ))) return;
641 if (pTask->flags & TDBF_WIN32)
643 FIXME("called for Win32 thread (%04x)!\n", pTask->teb->teb_sel );
649 if (pTask->nEvents == 1) NtSetEvent( pTask->hEvent, NULL );
653 /***********************************************************************
654 * SetPriority (KERNEL.32)
656 void WINAPI SetPriority16( HTASK16 hTask, INT16 delta )
661 if (!hTask) hTask = GetCurrentTask();
662 if (!(pTask = TASK_GetPtr( hTask ))) return;
663 newpriority = pTask->priority + delta;
664 if (newpriority < -32) newpriority = -32;
665 else if (newpriority > 15) newpriority = 15;
667 pTask->priority = newpriority + 1;
668 TASK_UnlinkTask( pTask->hSelf );
669 TASK_LinkTask( pTask->hSelf );
674 /***********************************************************************
675 * LockCurrentTask (KERNEL.33)
677 HTASK16 WINAPI LockCurrentTask16( BOOL16 bLock )
679 if (bLock) hLockedTask = GetCurrentTask();
680 else hLockedTask = 0;
685 /***********************************************************************
686 * IsTaskLocked (KERNEL.122)
688 HTASK16 WINAPI IsTaskLocked16(void)
694 /***********************************************************************
695 * OldYield (KERNEL.117)
697 void WINAPI OldYield16(void)
701 ReleaseThunkLock(&count);
702 RestoreThunkLock(count);
705 /***********************************************************************
706 * WIN32_OldYield (KERNEL.447)
708 void WINAPI WIN32_OldYield16(void)
712 ReleaseThunkLock(&count);
713 RestoreThunkLock(count);
716 /***********************************************************************
717 * DirectedYield (KERNEL.150)
719 void WINAPI DirectedYield16( HTASK16 hTask )
721 TDB *pCurTask = TASK_GetCurrent();
723 if (!pCurTask) OldYield16();
726 if (pCurTask->flags & TDBF_WIN32)
728 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
732 TRACE("%04x: DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
733 pCurTask->hYieldTo = hTask;
735 TRACE("%04x: back from DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
739 /***********************************************************************
742 void WINAPI Yield16(void)
744 TDB *pCurTask = TASK_GetCurrent();
746 if (pCurTask) pCurTask->hYieldTo = 0;
747 if (pCurTask && pCurTask->hQueue)
749 HMODULE mod = GetModuleHandleA( "user32.dll" );
752 FARPROC proc = GetProcAddress( mod, "UserYield16" );
763 /***********************************************************************
764 * KERNEL_490 (KERNEL.490)
766 HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
768 if ( !someTask ) return 0;
770 FIXME("(%04x): stub\n", someTask );
774 /***********************************************************************
775 * MakeProcInstance (KERNEL.51)
777 FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
781 WORD hInstanceSelector;
783 hInstanceSelector = GlobalHandleToSel16(hInstance);
785 TRACE("(%08lx, %04x);\n", (DWORD)func, hInstance);
788 /* Win95 actually protects via SEH, but this is better for debugging */
789 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD)func);
793 if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
795 && (hInstance != 0xffff) )
797 /* calling MPI with a foreign DSEG is invalid ! */
798 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
799 hInstance,CURRENT_DS);
802 /* Always use the DSEG that MPI was entered with.
803 * We used to set hInstance to GetTaskDS16(), but this should be wrong
804 * as CURRENT_DS provides the DSEG value we need.
805 * ("calling" DS, *not* "task" DS !) */
806 hInstanceSelector = CURRENT_DS;
807 hInstance = GlobalHandle16(hInstanceSelector);
809 /* no thunking for DLLs */
810 if (NE_GetPtr(FarGetOwner16(hInstance))->flags & NE_FFLAGS_LIBMODULE)
813 thunkaddr = TASK_AllocThunk();
814 if (!thunkaddr) return (FARPROC16)0;
815 thunk = MapSL( thunkaddr );
816 lfunc = MapSL( (SEGPTR)func );
818 TRACE("(%08lx,%04x): got thunk %08lx\n",
819 (DWORD)func, hInstance, (DWORD)thunkaddr );
820 if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
821 ((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
823 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
826 *thunk++ = 0xb8; /* movw instance, %ax */
827 *thunk++ = (BYTE)(hInstanceSelector & 0xff);
828 *thunk++ = (BYTE)(hInstanceSelector >> 8);
829 *thunk++ = 0xea; /* ljmp func */
830 *(DWORD *)thunk = (DWORD)func;
831 return (FARPROC16)thunkaddr;
832 /* CX reg indicates if thunkaddr != NULL, implement if needed */
836 /***********************************************************************
837 * FreeProcInstance (KERNEL.52)
839 void WINAPI FreeProcInstance16( FARPROC16 func )
841 TRACE("(%08lx)\n", (DWORD)func );
842 TASK_FreeThunk( (SEGPTR)func );
845 /**********************************************************************
846 * TASK_GetCodeSegment
848 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
849 * and logical segment number of a given code segment.
851 * 'proc' either *is* already a pair of module handle and segment number,
852 * in which case there's nothing to do. Otherwise, it is a pointer to
853 * a function, and we need to retrieve the code segment. If the pointer
854 * happens to point to a thunk, we'll retrieve info about the code segment
855 * where the function pointed to by the thunk resides, not the thunk itself.
857 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
858 * the function the snoop code will return to ...
861 static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
862 SEGTABLEENTRY **ppSeg, int *pSegNr )
864 NE_MODULE *pModule = NULL;
865 SEGTABLEENTRY *pSeg = NULL;
868 /* Try pair of module handle / segment number */
869 pModule = (NE_MODULE *) GlobalLock16( HIWORD( proc ) );
870 if ( pModule && pModule->magic == IMAGE_OS2_SIGNATURE )
872 segNr = LOWORD( proc );
873 if ( segNr && segNr <= pModule->seg_count )
874 pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
877 /* Try thunk or function */
880 BYTE *thunk = MapSL( (SEGPTR)proc );
883 if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
884 selector = thunk[6] + (thunk[7] << 8);
886 selector = HIWORD( proc );
888 pModule = NE_GetPtr( GlobalHandle16( selector ) );
889 pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
892 for ( segNr = 1; segNr <= pModule->seg_count; segNr++, pSeg++ )
893 if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
896 if ( pModule && segNr > pModule->seg_count )
900 /* Abort if segment not found */
902 if ( !pModule || !pSeg )
905 /* Return segment data */
907 if ( ppModule ) *ppModule = pModule;
908 if ( ppSeg ) *ppSeg = pSeg;
909 if ( pSegNr ) *pSegNr = segNr;
914 /**********************************************************************
915 * GetCodeHandle (KERNEL.93)
917 HANDLE16 WINAPI GetCodeHandle16( FARPROC16 proc )
921 if ( !TASK_GetCodeSegment( proc, NULL, &pSeg, NULL ) )
927 /**********************************************************************
928 * GetCodeInfo (KERNEL.104)
930 BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
936 if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
939 /* Fill in segment information */
941 segInfo->offSegment = pSeg->filepos;
942 segInfo->cbSegment = pSeg->size;
943 segInfo->flags = pSeg->flags;
944 segInfo->cbAlloc = pSeg->minsize;
945 segInfo->h = pSeg->hSeg;
946 segInfo->alignShift = pModule->alignment;
948 if ( segNr == pModule->dgroup )
949 segInfo->cbAlloc += pModule->heap_size + pModule->stack_size;
951 /* Return module handle in %es */
953 CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
959 /**********************************************************************
960 * DefineHandleTable (KERNEL.94)
962 BOOL16 WINAPI DefineHandleTable16( WORD wOffset )
964 FIXME("(%04x): stub ?\n", wOffset);
969 /***********************************************************************
970 * SetTaskQueue (KERNEL.34)
972 HQUEUE16 WINAPI SetTaskQueue16( HTASK16 hTask, HQUEUE16 hQueue )
977 if (!hTask) hTask = GetCurrentTask();
978 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
980 hPrev = pTask->hQueue;
981 pTask->hQueue = hQueue;
987 /***********************************************************************
988 * GetTaskQueue (KERNEL.35)
990 HQUEUE16 WINAPI GetTaskQueue16( HTASK16 hTask )
994 if (!hTask) hTask = GetCurrentTask();
995 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
996 return pTask->hQueue;
999 /***********************************************************************
1000 * SetThreadQueue (KERNEL.463)
1002 HQUEUE16 WINAPI SetThreadQueue16( DWORD thread, HQUEUE16 hQueue )
1004 TEB *teb = thread? THREAD_IdToTEB( thread ) : NtCurrentTeb();
1005 HQUEUE16 oldQueue = teb? teb->queue : 0;
1009 teb->queue = hQueue;
1011 if ( GetTaskQueue16( teb->htask16 ) == oldQueue )
1012 SetTaskQueue16( teb->htask16, hQueue );
1018 /***********************************************************************
1019 * GetThreadQueue (KERNEL.464)
1021 HQUEUE16 WINAPI GetThreadQueue16( DWORD thread )
1025 teb = NtCurrentTeb();
1026 else if ( HIWORD(thread) )
1027 teb = THREAD_IdToTEB( thread );
1028 else if ( IsTask16( (HTASK16)thread ) )
1029 teb = (TASK_GetPtr( (HANDLE16)thread ))->teb;
1031 return (HQUEUE16)(teb? teb->queue : 0);
1034 /***********************************************************************
1035 * SetFastQueue (KERNEL.624)
1037 VOID WINAPI SetFastQueue16( DWORD thread, HQUEUE16 hQueue )
1041 teb = NtCurrentTeb();
1042 else if ( HIWORD(thread) )
1043 teb = THREAD_IdToTEB( thread );
1044 else if ( IsTask16( (HTASK16)thread ) )
1045 teb = (TASK_GetPtr( (HANDLE16)thread ))->teb;
1047 if ( teb ) teb->queue = hQueue;
1050 /***********************************************************************
1051 * GetFastQueue (KERNEL.625)
1053 HQUEUE16 WINAPI GetFastQueue16( void )
1055 HQUEUE16 ret = NtCurrentTeb()->queue;
1057 if (!ret) FIXME("(): should initialize thread-local queue, expect failure!\n" );
1061 /***********************************************************************
1062 * SwitchStackTo (KERNEL.108)
1064 void WINAPI SwitchStackTo16( WORD seg, WORD ptr, WORD top )
1067 STACK16FRAME *oldFrame, *newFrame;
1068 INSTANCEDATA *pData;
1071 if (!(pTask = TASK_GetCurrent())) return;
1072 if (!(pData = (INSTANCEDATA *)GlobalLock16( seg ))) return;
1073 TRACE("old=%04x:%04x new=%04x:%04x\n",
1074 SELECTOROF( pTask->teb->cur_stack ),
1075 OFFSETOF( pTask->teb->cur_stack ), seg, ptr );
1077 /* Save the old stack */
1079 oldFrame = THREAD_STACK16( pTask->teb );
1080 /* pop frame + args and push bp */
1081 pData->old_ss_sp = pTask->teb->cur_stack + sizeof(STACK16FRAME)
1083 *(WORD *)MapSL(pData->old_ss_sp) = oldFrame->bp;
1084 pData->stacktop = top;
1085 pData->stackmin = ptr;
1086 pData->stackbottom = ptr;
1088 /* Switch to the new stack */
1090 /* Note: we need to take the 3 arguments into account; otherwise,
1091 * the stack will underflow upon return from this function.
1093 copySize = oldFrame->bp - OFFSETOF(pData->old_ss_sp);
1094 copySize += 3 * sizeof(WORD) + sizeof(STACK16FRAME);
1095 pTask->teb->cur_stack = MAKESEGPTR( seg, ptr - copySize );
1096 newFrame = THREAD_STACK16( pTask->teb );
1098 /* Copy the stack frame and the local variables to the new stack */
1100 memmove( newFrame, oldFrame, copySize );
1102 *(WORD *)MapSL( MAKESEGPTR( seg, ptr ) ) = 0; /* clear previous bp */
1106 /***********************************************************************
1107 * SwitchStackBack (KERNEL.109)
1109 void WINAPI SwitchStackBack16( CONTEXT86 *context )
1111 STACK16FRAME *oldFrame, *newFrame;
1112 INSTANCEDATA *pData;
1114 if (!(pData = (INSTANCEDATA *)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack))))
1116 if (!pData->old_ss_sp)
1118 WARN("No previous SwitchStackTo\n" );
1121 TRACE("restoring stack %04x:%04x\n",
1122 SELECTOROF(pData->old_ss_sp), OFFSETOF(pData->old_ss_sp) );
1124 oldFrame = CURRENT_STACK16;
1126 /* Pop bp from the previous stack */
1128 context->Ebp = (context->Ebp & ~0xffff) | *(WORD *)MapSL(pData->old_ss_sp);
1129 pData->old_ss_sp += sizeof(WORD);
1131 /* Switch back to the old stack */
1133 NtCurrentTeb()->cur_stack = pData->old_ss_sp - sizeof(STACK16FRAME);
1134 context->SegSs = SELECTOROF(pData->old_ss_sp);
1135 context->Esp = OFFSETOF(pData->old_ss_sp) - sizeof(DWORD); /*ret addr*/
1136 pData->old_ss_sp = 0;
1138 /* Build a stack frame for the return */
1140 newFrame = CURRENT_STACK16;
1141 newFrame->frame32 = oldFrame->frame32;
1142 newFrame->module_cs = oldFrame->module_cs;
1143 newFrame->callfrom_ip = oldFrame->callfrom_ip;
1144 newFrame->entry_ip = oldFrame->entry_ip;
1148 /***********************************************************************
1149 * GetTaskQueueDS (KERNEL.118)
1151 void WINAPI GetTaskQueueDS16(void)
1153 CURRENT_STACK16->ds = GlobalHandleToSel16( GetTaskQueue16(0) );
1157 /***********************************************************************
1158 * GetTaskQueueES (KERNEL.119)
1160 void WINAPI GetTaskQueueES16(void)
1162 CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
1166 /***********************************************************************
1167 * GetCurrentTask (KERNEL32.@)
1169 HTASK16 WINAPI GetCurrentTask(void)
1171 return NtCurrentTeb()->htask16;
1174 /***********************************************************************
1175 * GetCurrentTask (KERNEL.36)
1177 DWORD WINAPI WIN16_GetCurrentTask(void)
1179 /* This is the version used by relay code; the first task is */
1180 /* returned in the high word of the result */
1181 return MAKELONG( GetCurrentTask(), hFirstTask );
1185 /***********************************************************************
1186 * GetCurrentPDB (KERNEL.37)
1188 * UNDOC: returns PSP of KERNEL in high word
1190 DWORD WINAPI GetCurrentPDB16(void)
1194 if (!(pTask = TASK_GetCurrent())) return 0;
1195 return MAKELONG(pTask->hPDB, 0); /* FIXME */
1199 /***********************************************************************
1200 * GetCurPID (KERNEL.157)
1202 DWORD WINAPI GetCurPID16( DWORD unused )
1208 /***********************************************************************
1209 * GetInstanceData (KERNEL.54)
1211 INT16 WINAPI GetInstanceData16( HINSTANCE16 instance, WORD buffer, INT16 len )
1213 char *ptr = (char *)GlobalLock16( instance );
1214 if (!ptr || !len) return 0;
1215 if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
1216 memcpy( (char *)GlobalLock16(CURRENT_DS) + buffer, ptr + buffer, len );
1221 /***********************************************************************
1222 * GetExeVersion (KERNEL.105)
1224 WORD WINAPI GetExeVersion16(void)
1228 if (!(pTask = TASK_GetCurrent())) return 0;
1229 return pTask->version;
1233 /***********************************************************************
1234 * SetErrorMode (KERNEL.107)
1236 UINT16 WINAPI SetErrorMode16( UINT16 mode )
1239 if (!(pTask = TASK_GetCurrent())) return 0;
1240 pTask->error_mode = mode;
1241 return SetErrorMode( mode );
1245 /***********************************************************************
1246 * GetNumTasks (KERNEL.152)
1248 UINT16 WINAPI GetNumTasks16(void)
1254 /***********************************************************************
1255 * GetTaskDS (KERNEL.155)
1257 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1258 * I don't think we need to bother with this.
1260 HINSTANCE16 WINAPI GetTaskDS16(void)
1264 if (!(pTask = TASK_GetCurrent())) return 0;
1265 return GlobalHandleToSel16(pTask->hInstance);
1268 /***********************************************************************
1269 * GetDummyModuleHandleDS (KERNEL.602)
1271 WORD WINAPI GetDummyModuleHandleDS16(void)
1276 if (!(pTask = TASK_GetCurrent())) return 0;
1277 if (!(pTask->flags & TDBF_WIN32)) return 0;
1278 selector = GlobalHandleToSel16( pTask->hModule );
1279 CURRENT_DS = selector;
1283 /***********************************************************************
1284 * IsTask (KERNEL.320)
1286 BOOL16 WINAPI IsTask16( HTASK16 hTask )
1290 if (!(pTask = TASK_GetPtr( hTask ))) return FALSE;
1291 if (GlobalSize16( hTask ) < sizeof(TDB)) return FALSE;
1292 return (pTask->magic == TDB_MAGIC);
1296 /***********************************************************************
1297 * IsWinOldApTask (KERNEL.158)
1299 BOOL16 WINAPI IsWinOldApTask16( HTASK16 hTask )
1301 /* should return bit 0 of byte 0x48 in PSP */
1305 /***********************************************************************
1306 * SetTaskSignalProc (KERNEL.38)
1308 FARPROC16 WINAPI SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
1313 if (!hTask) hTask = GetCurrentTask();
1314 if (!(pTask = TASK_GetPtr( hTask ))) return NULL;
1315 oldProc = pTask->userhandler;
1316 pTask->userhandler = proc;
1320 /***********************************************************************
1321 * TASK_CallTaskSignalProc
1323 /* ### start build ### */
1324 extern WORD CALLBACK TASK_CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
1325 /* ### stop build ### */
1326 void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule )
1328 TDB *pTask = TASK_GetCurrent();
1329 if ( !pTask || !pTask->userhandler ) return;
1331 TASK_CallTo16_word_wwwww( pTask->userhandler,
1332 hTaskOrModule, uCode, 0,
1333 pTask->hInstance, pTask->hQueue );
1336 /***********************************************************************
1337 * SetSigHandler (KERNEL.140)
1339 WORD WINAPI SetSigHandler16( FARPROC16 newhandler, FARPROC16* oldhandler,
1340 UINT16 *oldmode, UINT16 newmode, UINT16 flag )
1342 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1343 newhandler,oldhandler,oldmode,newmode,flag );
1345 if (flag != 1) return 0;
1346 if (!newmode) newhandler = NULL; /* Default handler */
1351 if (!(pTask = TASK_GetCurrent())) return 0;
1352 if (oldmode) *oldmode = pTask->signal_flags;
1353 pTask->signal_flags = newmode;
1354 if (oldhandler) *oldhandler = pTask->sighandler;
1355 pTask->sighandler = newhandler;
1361 /***********************************************************************
1362 * GlobalNotify (KERNEL.154)
1364 * Note that GlobalNotify does _not_ return the old NotifyProc
1365 * -- contrary to LocalNotify !!
1367 VOID WINAPI GlobalNotify16( FARPROC16 proc )
1371 if (!(pTask = TASK_GetCurrent())) return;
1372 pTask->discardhandler = proc;
1376 /***********************************************************************
1379 static inline HMODULE16 GetExePtrHelper( HANDLE16 handle, HTASK16 *hTask )
1384 /* Check for module handle */
1386 if (!(ptr = GlobalLock16( handle ))) return 0;
1387 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return handle;
1389 /* Search for this handle inside all tasks */
1391 *hTask = hFirstTask;
1394 TDB *pTask = TASK_GetPtr( *hTask );
1395 if ((*hTask == handle) ||
1396 (pTask->hInstance == handle) ||
1397 (pTask->hQueue == handle) ||
1398 (pTask->hPDB == handle)) return pTask->hModule;
1399 *hTask = pTask->hNext;
1402 /* Check the owner for module handle */
1404 owner = FarGetOwner16( handle );
1405 if (!(ptr = GlobalLock16( owner ))) return 0;
1406 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return owner;
1408 /* Search for the owner inside all tasks */
1410 *hTask = hFirstTask;
1413 TDB *pTask = TASK_GetPtr( *hTask );
1414 if ((*hTask == owner) ||
1415 (pTask->hInstance == owner) ||
1416 (pTask->hQueue == owner) ||
1417 (pTask->hPDB == owner)) return pTask->hModule;
1418 *hTask = pTask->hNext;
1424 /***********************************************************************
1425 * GetExePtr (KERNEL.133)
1427 HMODULE16 WINAPI WIN16_GetExePtr( HANDLE16 handle )
1430 HMODULE16 hModule = GetExePtrHelper( handle, &hTask );
1431 STACK16FRAME *frame = CURRENT_STACK16;
1432 frame->ecx = hModule;
1433 if (hTask) frame->es = hTask;
1438 /***********************************************************************
1441 HMODULE16 WINAPI GetExePtr( HANDLE16 handle )
1444 return GetExePtrHelper( handle, &hTask );
1448 /***********************************************************************
1449 * TaskFirst (TOOLHELP.63)
1451 BOOL16 WINAPI TaskFirst16( TASKENTRY *lpte )
1453 lpte->hNext = hFirstTask;
1454 return TaskNext16( lpte );
1458 /***********************************************************************
1459 * TaskNext (TOOLHELP.64)
1461 BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
1464 INSTANCEDATA *pInstData;
1466 TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
1467 if (!lpte->hNext) return FALSE;
1469 /* make sure that task and hInstance are valid (skip initial Wine task !) */
1471 pTask = TASK_GetPtr( lpte->hNext );
1472 if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
1473 if (pTask->hInstance)
1475 lpte->hNext = pTask->hNext;
1477 pInstData = MapSL( MAKESEGPTR( GlobalHandleToSel16(pTask->hInstance), 0 ) );
1478 lpte->hTask = lpte->hNext;
1479 lpte->hTaskParent = pTask->hParent;
1480 lpte->hInst = pTask->hInstance;
1481 lpte->hModule = pTask->hModule;
1482 lpte->wSS = SELECTOROF( pTask->teb->cur_stack );
1483 lpte->wSP = OFFSETOF( pTask->teb->cur_stack );
1484 lpte->wStackTop = pInstData->stacktop;
1485 lpte->wStackMinimum = pInstData->stackmin;
1486 lpte->wStackBottom = pInstData->stackbottom;
1487 lpte->wcEvents = pTask->nEvents;
1488 lpte->hQueue = pTask->hQueue;
1489 lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
1490 lpte->wPSPOffset = 0x100; /*??*/
1491 lpte->hNext = pTask->hNext;
1496 /***********************************************************************
1497 * TaskFindHandle (TOOLHELP.65)
1499 BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
1501 lpte->hNext = hTask;
1502 return TaskNext16( lpte );
1506 typedef INT (WINAPI *MessageBoxA_funcptr)(HWND hWnd, LPCSTR text, LPCSTR title, UINT type);
1508 /**************************************************************************
1509 * FatalAppExit (KERNEL.137)
1511 void WINAPI FatalAppExit16( UINT16 action, LPCSTR str )
1513 TDB *pTask = TASK_GetCurrent();
1515 if (!pTask || !(pTask->error_mode & SEM_NOGPFAULTERRORBOX))
1517 HMODULE mod = GetModuleHandleA( "user32.dll" );
1520 MessageBoxA_funcptr pMessageBoxA = (MessageBoxA_funcptr)GetProcAddress( mod, "MessageBoxA" );
1523 pMessageBoxA( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
1527 ERR( "%s\n", debugstr_a(str) );
1534 /***********************************************************************
1535 * TerminateApp (TOOLHELP.77)
1537 * See "Undocumented Windows".
1539 void WINAPI TerminateApp16(HTASK16 hTask, WORD wFlags)
1541 if (hTask && hTask != GetCurrentTask())
1543 FIXME("cannot terminate task %x\n", hTask);
1547 if (wFlags & NO_UAE_BOX)
1550 old_mode = SetErrorMode16(0);
1551 SetErrorMode16(old_mode|SEM_NOGPFAULTERRORBOX);
1553 FatalAppExit16( 0, NULL );
1555 /* hmm, we're still alive ?? */
1557 /* check undocumented flag */
1558 if (!(wFlags & 0x8000))
1559 TASK_CallTaskSignalProc( USIG16_TERMINATION, hTask );
1561 /* UndocWin says to call int 0x21/0x4c exit=0xff here,
1562 but let's just call ExitThread */
1567 /***********************************************************************
1568 * GetAppCompatFlags (KERNEL.354)
1570 DWORD WINAPI GetAppCompatFlags16( HTASK16 hTask )
1574 if (!hTask) hTask = GetCurrentTask();
1575 if (!(pTask=TASK_GetPtr( hTask ))) return 0;
1576 if (GlobalSize16(hTask) < sizeof(TDB)) return 0;
1577 return pTask->compat_flags;