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wine/if1632/thunk.c
Andreas Mohr a00b49f068 - Several kernel.spec return type mismatch fixes 
- [GS]etSelectorBase Win32s offset support by Ulrich Weigand (thanks v.m. !!)
- Move AppToWine/WineToApp macros as W32S_APP2WINE etc. to ldt.h
- LocalNotify() basic support
- Fixes for local heap handling with heap handles created by Virtual*()
1998-12-07 10:48:09 +00:00

1448 lines
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/*
* Emulator thunks
*
* Copyright 1996, 1997 Alexandre Julliard
* Copyright 1998 Ulrich Weigand
*/
#include "windows.h"
#include "callback.h"
#include "resource.h"
#include "task.h"
#include "user.h"
#include "heap.h"
#include "hook.h"
#include "module.h"
#include "process.h"
#include "stackframe.h"
#include "selectors.h"
#include "task.h"
#include "except.h"
#include "win.h"
#include "flatthunk.h"
#include "mouse.h"
#include "keyboard.h"
#include "debug.h"
/* List of the 16-bit callback functions. This list is used */
/* by the build program to generate the file if1632/callto16.S */
/* ### start build ### */
extern LONG CALLBACK CallTo16_sreg_(const CONTEXT *context, INT32 offset);
extern LONG CALLBACK CallTo16_lreg_(const CONTEXT *context, INT32 offset);
extern WORD CALLBACK CallTo16_word_ (FARPROC16);
extern LONG CALLBACK CallTo16_long_ (FARPROC16);
extern WORD CALLBACK CallTo16_word_w (FARPROC16,WORD);
extern LONG CALLBACK CallTo16_long_l (FARPROC16,LONG);
extern WORD CALLBACK CallTo16_word_ww (FARPROC16,WORD,WORD);
extern WORD CALLBACK CallTo16_word_wl (FARPROC16,WORD,LONG);
extern WORD CALLBACK CallTo16_word_ll (FARPROC16,LONG,LONG);
extern LONG CALLBACK CallTo16_long_ll (FARPROC16,LONG,LONG);
extern WORD CALLBACK CallTo16_word_www (FARPROC16,WORD,WORD,WORD);
extern WORD CALLBACK CallTo16_word_wwl (FARPROC16,WORD,WORD,LONG);
extern WORD CALLBACK CallTo16_word_wlw (FARPROC16,WORD,LONG,WORD);
extern LONG CALLBACK CallTo16_long_wwl (FARPROC16,WORD,WORD,LONG);
extern LONG CALLBACK CallTo16_long_lll (FARPROC16,LONG,LONG,LONG);
extern WORD CALLBACK CallTo16_word_llwl (FARPROC16,LONG,LONG,WORD,LONG);
extern WORD CALLBACK CallTo16_word_lwll (FARPROC16,LONG,WORD,LONG,LONG);
extern WORD CALLBACK CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD);
extern WORD CALLBACK CallTo16_word_wwll (FARPROC16,WORD,WORD,LONG,LONG);
extern WORD CALLBACK CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
extern WORD CALLBACK CallTo16_word_llll (FARPROC16,LONG,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_llll (FARPROC16,LONG,LONG,LONG,LONG);
extern WORD CALLBACK CallTo16_word_wllwl(FARPROC16,WORD,LONG,LONG,WORD,LONG);
extern LONG CALLBACK CallTo16_long_lwwll(FARPROC16,LONG,WORD,WORD,LONG,LONG);
extern WORD CALLBACK CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
extern WORD CALLBACK CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
extern WORD CALLBACK CallTo16_word_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_lllll(FARPROC16,LONG,LONG,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_llllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
LONG);
extern LONG CALLBACK CallTo16_long_lllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
LONG,LONG);
extern WORD CALLBACK CallTo16_word_llwwlll(FARPROC16,LONG,LONG,WORD,WORD,LONG,
LONG,LONG);
extern LONG CALLBACK CallTo16_word_lwwlllll(FARPROC16,LONG,WORD,WORD,LONG,LONG,
LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_llllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_lllllllll(FARPROC16,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_llllllllll(FARPROC16,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_lllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,LONG,
LONG);
extern LONG CALLBACK CallTo16_long_llllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,LONG,
LONG,LONG);
extern LONG CALLBACK CallTo16_long_lwwllwlllllw(FARPROC16,LONG,WORD,WORD,LONG,
LONG,WORD,LONG,LONG,LONG,LONG,
LONG,WORD);
extern LONG CALLBACK CallTo16_long_lllllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG);
extern LONG CALLBACK CallTo16_long_llllllllllllll(FARPROC16,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG);
extern LONG CALLBACK CallTo16_word_lwwwwlwwwwllll(FARPROC16,LONG,WORD,WORD,
WORD,WORD,LONG,WORD,WORD,
WORD,WORD,LONG,LONG,LONG,
LONG);
extern LONG CALLBACK CallTo16_long_lllllllllllllll(FARPROC16,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG,LONG);
extern LONG CALLBACK CallTo16_long_llllllllllllllll(FARPROC16,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG,LONG,LONG,
LONG,LONG,LONG);
/* ### stop build ### */
typedef void (*RELAY)();
#pragma pack(1)
typedef struct tagTHUNK
{
BYTE popl_eax; /* 0x58 popl %eax (return address)*/
BYTE pushl_func; /* 0x68 pushl $proc */
FARPROC32 proc WINE_PACKED;
BYTE pushl_eax; /* 0x50 pushl %eax */
BYTE jmp; /* 0xe9 jmp relay (relative jump)*/
RELAY relay WINE_PACKED;
struct tagTHUNK *next WINE_PACKED;
} THUNK;
#pragma pack(4)
#define DECL_THUNK(name,proc,relay) \
THUNK name = { 0x58, 0x68, (FARPROC32)(proc), 0x50, 0xe9, \
(RELAY)((char *)(relay) - (char *)(&(name).next)), NULL }
static THUNK *firstThunk = NULL;
static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd,
UINT16 msg, WPARAM16 wParam,
LPARAM lParam );
static void WINAPI THUNK_CallTaskReschedule(void);
static BOOL32 WINAPI THUNK_WOWCallback16Ex( FARPROC16,DWORD,DWORD,
LPVOID,LPDWORD );
/* TASK_Reschedule() 16-bit entry point */
static FARPROC16 TASK_RescheduleProc;
static BOOL32 THUNK_ThunkletInit( void );
extern void CallFrom16_p_long_wwwll(void);
/* Callbacks function table for the emulator */
static const CALLBACKS_TABLE CALLBACK_EmulatorTable =
{
(void *)CallTo16_sreg_, /* CallRegisterShortProc */
(void *)CallTo16_lreg_, /* CallRegisterLongProc */
THUNK_CallTaskReschedule, /* CallTaskRescheduleProc */
CallFrom16_p_long_wwwll, /* CallFrom16WndProc */
THUNK_CallWndProc16, /* CallWndProc */
(void *)CallTo16_long_lwwll, /* CallDriverProc */
(void *)CallTo16_word_wwlll, /* CallDriverCallback */
(void *)CallTo16_word_wwlll, /* CallTimeFuncProc */
(void *)CallTo16_word_w, /* CallWindowsExitProc */
(void *)CallTo16_word_lwww, /* CallWordBreakProc */
(void *)CallTo16_word_ww, /* CallBootAppProc */
(void *)CallTo16_word_www, /* CallLoadAppSegProc */
(void *)CallTo16_word_www, /* CallLocalNotifyFunc */
(void *)CallTo16_word_, /* CallSystemTimerProc */
(void *)CallTo16_word_www, /* CallResourceHandlerProc */
(void *)CallTo16_word_wwwl, /* CallPostAppMessageProc */
(void *)CallTo16_long_l, /* CallWOWCallbackProc */
THUNK_WOWCallback16Ex, /* CallWOWCallback16Ex */
(void *)CallTo16_long_l, /* CallASPIPostProc */
(void *)CallTo16_word_lwll, /* CallDrvControlProc */
(void *)CallTo16_word_lwlll, /* CallDrvEnableProc */
(void *)CallTo16_word_llll, /* CallDrvEnumDFontsProc */
(void *)CallTo16_word_lwll, /* CallDrvEnumObjProc */
(void *)CallTo16_word_lwwlllll, /* CallDrvOutputProc */
(void *)CallTo16_long_lwlll, /* CallDrvRealizeProc */
(void *)CallTo16_word_lwwwwlwwwwllll, /* CallDrvStretchBltProc */
(void *)CallTo16_long_lwwllwlllllw, /* CallDrvExtTextOutProc */
(void *)CallTo16_word_llwwlll, /* CallDrvGetCharWidth */
(void *)CallTo16_word_ww /* CallDrvAbortProc */
};
/***********************************************************************
* THUNK_Init
*/
BOOL32 THUNK_Init(void)
{
/* Set the window proc calling functions */
Callbacks = &CALLBACK_EmulatorTable;
/* Get the 16-bit reschedule function pointer */
TASK_RescheduleProc = MODULE_GetWndProcEntry16( "TASK_Reschedule" );
/* Initialize Thunklets */
return THUNK_ThunkletInit();
}
/***********************************************************************
* THUNK_Alloc
*/
static THUNK *THUNK_Alloc( FARPROC32 func, RELAY relay )
{
THUNK *thunk = HeapAlloc( GetProcessHeap(), 0, sizeof(*thunk) );
if (thunk)
{
thunk->popl_eax = 0x58;
thunk->pushl_func = 0x68;
thunk->proc = func;
thunk->pushl_eax = 0x50;
thunk->jmp = 0xe9;
thunk->relay = (RELAY)((char *)relay - (char *)(&thunk->next));
thunk->next = firstThunk;
firstThunk = thunk;
}
return thunk;
}
/***********************************************************************
* THUNK_Find
*/
static THUNK *THUNK_Find( FARPROC32 func )
{
THUNK *thunk = firstThunk;
while (thunk && (thunk->proc != func)) thunk = thunk->next;
return thunk;
}
/***********************************************************************
* THUNK_Free
*/
static void THUNK_Free( THUNK *thunk )
{
if (HEAP_IsInsideHeap( GetProcessHeap(), 0, thunk ))
{
THUNK **prev = &firstThunk;
while (*prev && (*prev != thunk)) prev = &(*prev)->next;
if (*prev)
{
*prev = thunk->next;
HeapFree( GetProcessHeap(), 0, thunk );
return;
}
}
ERR(thunk, "invalid thunk addr %p\n", thunk );
}
/***********************************************************************
* THUNK_CallWndProc16
*
* Call a 16-bit window procedure
*/
static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd,
UINT16 msg, WPARAM16 wParam,
LPARAM lParam )
{
CONTEXT context;
LRESULT ret;
WORD *args;
WND *wndPtr = WIN_FindWndPtr( hwnd );
DWORD offset = 0;
THDB *thdb = THREAD_Current();
/* Window procedures want ax = hInstance, ds = es = ss */
memset(&context, '\0', sizeof(context));
DS_reg(&context) = SELECTOROF(thdb->cur_stack);
ES_reg(&context) = DS_reg(&context);
EAX_reg(&context) = wndPtr ? wndPtr->hInstance : DS_reg(&context);
CS_reg(&context) = SELECTOROF(proc);
EIP_reg(&context) = OFFSETOF(proc);
EBP_reg(&context) = OFFSETOF(thdb->cur_stack)
+ (WORD)&((STACK16FRAME*)0)->bp;
if (lParam)
{
/* Some programs (eg. the "Undocumented Windows" examples, JWP) only
work if structures passed in lParam are placed in the stack/data
segment. Programmers easily make the mistake of converting lParam
to a near rather than a far pointer, since Windows apparently
allows this. We copy the structures to the 16 bit stack; this is
ugly but makes these programs work. */
switch (msg)
{
case WM_CREATE:
case WM_NCCREATE:
offset = sizeof(CREATESTRUCT16); break;
case WM_DRAWITEM:
offset = sizeof(DRAWITEMSTRUCT16); break;
case WM_COMPAREITEM:
offset = sizeof(COMPAREITEMSTRUCT16); break;
}
if (offset)
{
void *s = PTR_SEG_TO_LIN(lParam);
lParam = STACK16_PUSH( thdb, offset );
memcpy( PTR_SEG_TO_LIN(lParam), s, offset );
}
}
args = (WORD *)THREAD_STACK16(thdb) - 5;
args[0] = LOWORD(lParam);
args[1] = HIWORD(lParam);
args[2] = wParam;
args[3] = msg;
args[4] = hwnd;
ret = CallTo16_sreg_( &context, 5 * sizeof(WORD) );
if (offset) STACK16_POP( thdb, offset );
return ret;
}
/***********************************************************************
* THUNK_CallTaskReschedule
*/
static void WINAPI THUNK_CallTaskReschedule(void)
{
CallTo16_word_(TASK_RescheduleProc);
}
/***********************************************************************
* THUNK_EnumObjects16 (GDI.71)
*/
INT16 WINAPI THUNK_EnumObjects16( HDC16 hdc, INT16 nObjType,
GOBJENUMPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_ll );
return EnumObjects16( hdc, nObjType, (GOBJENUMPROC16)&thunk, lParam );
}
/*************************************************************************
* THUNK_EnumFonts16 (GDI.70)
*/
INT16 WINAPI THUNK_EnumFonts16( HDC16 hdc, LPCSTR lpFaceName,
FONTENUMPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_llwl );
return EnumFonts16( hdc, lpFaceName, (FONTENUMPROC16)&thunk, lParam );
}
/******************************************************************
* THUNK_EnumMetaFile16 (GDI.175)
*/
BOOL16 WINAPI THUNK_EnumMetaFile16( HDC16 hdc, HMETAFILE16 hmf,
MFENUMPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_wllwl );
return EnumMetaFile16( hdc, hmf, (MFENUMPROC16)&thunk, lParam );
}
/*************************************************************************
* THUNK_EnumFontFamilies16 (GDI.330)
*/
INT16 WINAPI THUNK_EnumFontFamilies16( HDC16 hdc, LPCSTR lpszFamily,
FONTENUMPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_llwl );
return EnumFontFamilies16(hdc, lpszFamily, (FONTENUMPROC16)&thunk, lParam);
}
/*************************************************************************
* THUNK_EnumFontFamiliesEx16 (GDI.613)
*/
INT16 WINAPI THUNK_EnumFontFamiliesEx16( HDC16 hdc, LPLOGFONT16 lpLF,
FONTENUMPROCEX16 func, LPARAM lParam,
DWORD reserved )
{
DECL_THUNK( thunk, func, CallTo16_word_llwl );
return EnumFontFamiliesEx16( hdc, lpLF, (FONTENUMPROCEX16)&thunk,
lParam, reserved );
}
/**********************************************************************
* THUNK_LineDDA16 (GDI.100)
*/
void WINAPI THUNK_LineDDA16( INT16 nXStart, INT16 nYStart, INT16 nXEnd,
INT16 nYEnd, LINEDDAPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_wwl );
LineDDA16( nXStart, nYStart, nXEnd, nYEnd, (LINEDDAPROC16)&thunk, lParam );
}
/*******************************************************************
* THUNK_EnumWindows16 (USER.54)
*/
BOOL16 WINAPI THUNK_EnumWindows16( WNDENUMPROC16 func, LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_wl );
return EnumWindows16( (WNDENUMPROC16)&thunk, lParam );
}
/**********************************************************************
* THUNK_EnumChildWindows16 (USER.55)
*/
BOOL16 WINAPI THUNK_EnumChildWindows16( HWND16 parent, WNDENUMPROC16 func,
LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_wl );
return EnumChildWindows16( parent, (WNDENUMPROC16)&thunk, lParam );
}
/**********************************************************************
* THUNK_EnumTaskWindows16 (USER.225)
*/
BOOL16 WINAPI THUNK_EnumTaskWindows16( HTASK16 hTask, WNDENUMPROC16 func,
LPARAM lParam )
{
DECL_THUNK( thunk, func, CallTo16_word_wl );
return EnumTaskWindows16( hTask, (WNDENUMPROC16)&thunk, lParam );
}
/***********************************************************************
* THUNK_EnumProps16 (USER.27)
*/
INT16 WINAPI THUNK_EnumProps16( HWND16 hwnd, PROPENUMPROC16 func )
{
DECL_THUNK( thunk, func, CallTo16_word_wlw );
return EnumProps16( hwnd, (PROPENUMPROC16)&thunk );
}
/***********************************************************************
* THUNK_GrayString16 (USER.185)
*/
BOOL16 WINAPI THUNK_GrayString16( HDC16 hdc, HBRUSH16 hbr,
GRAYSTRINGPROC16 func, LPARAM lParam,
INT16 cch, INT16 x, INT16 y,
INT16 cx, INT16 cy )
{
DECL_THUNK( thunk, func, CallTo16_word_wlw );
if (!func)
return GrayString16( hdc, hbr, NULL, lParam, cch, x, y, cx, cy );
else
return GrayString16( hdc, hbr, (GRAYSTRINGPROC16)&thunk, lParam, cch,
x, y, cx, cy );
}
/***********************************************************************
* THUNK_SetWindowsHook16 (USER.121)
*/
FARPROC16 WINAPI THUNK_SetWindowsHook16( INT16 id, HOOKPROC16 proc )
{
HINSTANCE16 hInst = FarGetOwner( HIWORD(proc) );
HTASK16 hTask = (id == WH_MSGFILTER) ? GetCurrentTask() : 0;
THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
if (!thunk) return 0;
return (FARPROC16)SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask);
}
/***********************************************************************
* THUNK_UnhookWindowsHook16 (USER.234)
*/
BOOL16 WINAPI THUNK_UnhookWindowsHook16( INT16 id, HOOKPROC16 proc )
{
BOOL16 ret;
THUNK *thunk = THUNK_Find( (FARPROC16)proc );
if (!thunk) return FALSE;
ret = UnhookWindowsHook16( id, (HOOKPROC16)thunk );
THUNK_Free( thunk );
return ret;
}
/***********************************************************************
* THUNK_SetWindowsHookEx16 (USER.291)
*/
HHOOK WINAPI THUNK_SetWindowsHookEx16( INT16 id, HOOKPROC16 proc,
HINSTANCE16 hInst, HTASK16 hTask )
{
THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
if (!thunk) return 0;
return SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask );
}
/***********************************************************************
* THUNK_UnhookWindowHookEx16 (USER.292)
*/
BOOL16 WINAPI THUNK_UnhookWindowsHookEx16( HHOOK hhook )
{
THUNK *thunk = (THUNK *)HOOK_GetProc16( hhook );
BOOL16 ret = UnhookWindowsHookEx16( hhook );
if (thunk) THUNK_Free( thunk );
return ret;
}
static FARPROC16 defDCHookProc = NULL;
/***********************************************************************
* THUNK_SetDCHook (GDI.190)
*/
BOOL16 WINAPI THUNK_SetDCHook( HDC16 hdc, FARPROC16 proc, DWORD dwHookData )
{
THUNK *thunk, *oldThunk;
if (!defDCHookProc) /* Get DCHook Win16 entry point */
defDCHookProc = NE_GetEntryPoint( GetModuleHandle16("USER"), 362 );
if (proc != defDCHookProc)
{
thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwll );
if (!thunk) return FALSE;
}
else thunk = (THUNK *)DCHook;
/* Free the previous thunk */
GetDCHook( hdc, (FARPROC16 *)&oldThunk );
if (oldThunk && (oldThunk != (THUNK *)DCHook)) THUNK_Free( oldThunk );
return SetDCHook( hdc, (FARPROC16)thunk, dwHookData );
}
/***********************************************************************
* THUNK_GetDCHook (GDI.191)
*/
DWORD WINAPI THUNK_GetDCHook( HDC16 hdc, FARPROC16 *phookProc )
{
THUNK *thunk = NULL;
DWORD ret = GetDCHook( hdc, (FARPROC16 *)&thunk );
if (thunk)
{
if (thunk == (THUNK *)DCHook)
{
if (!defDCHookProc) /* Get DCHook Win16 entry point */
defDCHookProc = NE_GetEntryPoint(GetModuleHandle16("USER"),362);
*phookProc = defDCHookProc;
}
else *phookProc = thunk->proc;
}
return ret;
}
/***********************************************************************
* THUNK_SetTaskSignalProc (KERNEL.38)
*/
FARPROC16 WINAPI THUNK_SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
{
static FARPROC16 defSignalProc16 = NULL;
THUNK *thunk = NULL;
if( !defSignalProc16 )
defSignalProc16 = NE_GetEntryPoint(GetModuleHandle16("USER"), 314 );
if( proc == defSignalProc16 )
thunk = (THUNK*)SetTaskSignalProc( hTask, (FARPROC16)&USER_SignalProc );
else
{
thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwwww );
if( !thunk ) return FALSE;
thunk = (THUNK*)SetTaskSignalProc( hTask, (FARPROC16)thunk );
}
if( thunk != (THUNK*)USER_SignalProc )
{
if( !thunk ) return NULL;
proc = thunk->proc;
THUNK_Free( thunk );
return proc;
}
return defSignalProc16;
}
/***********************************************************************
* THUNK_CreateThread16 (KERNEL.441)
*/
static DWORD CALLBACK THUNK_StartThread16( LPVOID threadArgs )
{
FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
DWORD param = ((DWORD *)threadArgs)[1];
HeapFree( GetProcessHeap(), 0, threadArgs );
return CallTo16_long_l( start, param );
}
HANDLE32 WINAPI THUNK_CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
FARPROC16 start, SEGPTR param,
DWORD flags, LPDWORD id )
{
DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
if (!threadArgs) return INVALID_HANDLE_VALUE32;
threadArgs[0] = (DWORD)start;
threadArgs[1] = (DWORD)param;
return CreateThread( sa, stack, THUNK_StartThread16, threadArgs, flags, id );
}
/***********************************************************************
* THUNK_WOWCallback16Ex (WOW32.3)(KERNEL32.55)
* Generic thunking routine to call 16 bit functions from 32bit code.
*
* RETURNS
* TRUE if the call was done
*/
static BOOL32 WINAPI THUNK_WOWCallback16Ex(
FARPROC16 proc, /* [in] 16bit function to call */
DWORD dwFlags, /* [in] flags (WCB_*) */
DWORD cbArgs, /* [in] number of arguments */
LPVOID xargs, /* [in/out] arguments */
LPDWORD pdwret /* [out] return value of the 16bit call */
) {
LPDWORD args = (LPDWORD)xargs;
DWORD ret,i;
TRACE(relay,"(%p,0x%08lx,%ld,%p,%p)\n",
proc,dwFlags,cbArgs,xargs,pdwret
);
if (dwFlags == WCB16_CDECL) {
/* swap the arguments */
args = HeapAlloc(GetProcessHeap(),0,cbArgs*sizeof(DWORD));
for (i=0;i<cbArgs;i++)
args[i] = ((DWORD*)xargs)[cbArgs-i-1];
}
switch (cbArgs) {
case 0: ret = CallTo16_long_(proc);break;
case 1: ret = CallTo16_long_l(proc,args[0]);break;
case 2: ret = CallTo16_long_ll(proc,args[0],args[1]);break;
case 3: ret = CallTo16_long_lll(proc,args[0],args[1],args[2]);break;
case 4: ret = CallTo16_long_llll(proc,args[0],args[1],args[2],args[3]);
break;
case 5: ret = CallTo16_long_lllll(proc,args[0],args[1],args[2],args[3],
args[4]
);
break;
case 6: ret = CallTo16_long_llllll(proc,args[0],args[1],args[2],args[3],
args[4],args[5]
);
break;
case 7: ret = CallTo16_long_lllllll(proc,args[0],args[1],args[2],args[3],
args[4],args[5],args[6]
);
break;
case 8: ret = CallTo16_long_llllllll(proc,args[0],args[1],args[2],args[3],
args[4],args[5],args[6],args[7]
);
break;
case 9: ret = CallTo16_long_lllllllll(proc,args[0],args[1],args[2],args[3],
args[4],args[5],args[6],args[7],args[8]
);
break;
case 10:ret = CallTo16_long_llllllllll(proc,args[0],args[1],args[2],args[3],
args[4],args[5],args[6],args[7],args[8],args[9]
);
break;
case 11:ret = CallTo16_long_lllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]
);
break;
case 12:ret = CallTo16_long_llllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],
args[10],args[11]
);
break;
case 13:ret = CallTo16_long_lllllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],
args[10],args[11],args[12]
);
break;
case 14:ret = CallTo16_long_llllllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],
args[10],args[11],args[12],args[13]
);
break;
case 15:ret = CallTo16_long_lllllllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],
args[10],args[11],args[12],args[13],args[14]
);
break;
case 16:ret = CallTo16_long_llllllllllllllll(proc,args[0],args[1],args[2],
args[3],args[4],args[5],args[6],args[7],args[8],args[9],
args[10],args[11],args[12],args[13],args[14],args[15]
);
break;
default:
ERR(thunk,"%ld arguments not supported.\n",cbArgs);
if (dwFlags == WCB16_CDECL)
HeapFree(GetProcessHeap(),0,args);
return FALSE;
}
if (dwFlags == WCB16_CDECL)
HeapFree(GetProcessHeap(),0,args);
if (pdwret)
*pdwret = ret;
return TRUE;
}
/***********************************************************************
* THUNK_MOUSE_Enable (MOUSE.2)
*/
static VOID WINAPI THUNK_CallMouseEventProc( FARPROC16 proc,
DWORD dwFlags, DWORD dx, DWORD dy,
DWORD cButtons, DWORD dwExtraInfo )
{
CONTEXT context;
memset( &context, 0, sizeof(context) );
CS_reg(&context) = SELECTOROF( proc );
EIP_reg(&context) = OFFSETOF( proc );
AX_reg(&context) = (WORD)dwFlags;
BX_reg(&context) = (WORD)dx;
CX_reg(&context) = (WORD)dy;
DX_reg(&context) = (WORD)cButtons;
SI_reg(&context) = LOWORD( dwExtraInfo );
DI_reg(&context) = HIWORD( dwExtraInfo );
CallTo16_sreg_( &context, 0 );
}
VOID WINAPI THUNK_MOUSE_Enable( FARPROC16 proc )
{
static THUNK *lastThunk = NULL;
static FARPROC16 lastProc = NULL;
if ( lastProc != proc )
{
if ( lastThunk )
THUNK_Free( lastThunk );
if ( !proc )
lastThunk = NULL;
else
lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallMouseEventProc );
lastProc = proc;
}
return MOUSE_Enable( (LPMOUSE_EVENT_PROC)lastThunk );
}
/***********************************************************************
* GetMouseEventProc (USER.337)
*/
FARPROC16 WINAPI GetMouseEventProc(void)
{
HMODULE16 hmodule = GetModuleHandle16("USER");
return NE_GetEntryPoint( hmodule, NE_GetOrdinal( hmodule, "mouse_event" ));
}
/***********************************************************************
* WIN16_mouse_event (USER.299)
*/
void WINAPI WIN16_mouse_event( CONTEXT *context )
{
mouse_event( AX_reg(context), BX_reg(context), CX_reg(context),
DX_reg(context), MAKELONG(SI_reg(context), DI_reg(context)) );
}
/***********************************************************************
* THUNK_KEYBD_Enable (KEYBOARD.2)
*/
static VOID WINAPI THUNK_CallKeybdEventProc( FARPROC16 proc,
BYTE bVk, BYTE bScan,
DWORD dwFlags, DWORD dwExtraInfo )
{
CONTEXT context;
memset( &context, 0, sizeof(context) );
CS_reg(&context) = SELECTOROF( proc );
EIP_reg(&context) = OFFSETOF( proc );
AH_reg(&context) = (dwFlags & KEYEVENTF_KEYUP)? 0x80 : 0;
AL_reg(&context) = bVk;
BH_reg(&context) = (dwFlags & KEYEVENTF_EXTENDEDKEY)? 1 : 0;
BL_reg(&context) = bScan;
SI_reg(&context) = LOWORD( dwExtraInfo );
DI_reg(&context) = HIWORD( dwExtraInfo );
CallTo16_sreg_( &context, 0 );
}
VOID WINAPI THUNK_KEYBOARD_Enable( FARPROC16 proc, LPBYTE lpKeyState )
{
static THUNK *lastThunk = NULL;
static FARPROC16 lastProc = NULL;
if ( lastProc != proc )
{
if ( lastThunk )
THUNK_Free( lastThunk );
if ( !proc )
lastThunk = NULL;
else
lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallKeybdEventProc );
lastProc = proc;
}
return KEYBOARD_Enable( (LPKEYBD_EVENT_PROC)lastThunk, lpKeyState );
}
/***********************************************************************
* WIN16_keybd_event (USER.289)
*/
void WINAPI WIN16_keybd_event( CONTEXT *context )
{
DWORD dwFlags = 0;
if (AH_reg(context) & 0x80) dwFlags |= KEYEVENTF_KEYUP;
if (BH_reg(context) & 1 ) dwFlags |= KEYEVENTF_EXTENDEDKEY;
keybd_event( AL_reg(context), BL_reg(context),
dwFlags, MAKELONG(SI_reg(context), DI_reg(context)) );
}
/***********************************************************************
* 16->32 Flat Thunk routines:
*/
/***********************************************************************
* ThunkConnect16 (KERNEL.651)
* Connects a 32bit and a 16bit thunkbuffer.
*/
UINT32 WINAPI ThunkConnect16(
LPSTR module16, /* [in] name of win16 dll */
LPSTR module32, /* [in] name of win32 dll */
HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
DWORD dwReason, /* [in] initialisation argument */
struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
LPSTR thunkfun32, /* [in] win32 thunkfunction */
WORD cs /* [in] CS of win16 dll */
) {
BOOL32 directionSL;
if (!lstrncmp32A(TD->magic, "SL01", 4))
{
directionSL = TRUE;
TRACE(thunk, "SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
module16, (DWORD)TD, module32, thunkfun32, dwReason);
}
else if (!lstrncmp32A(TD->magic, "LS01", 4))
{
directionSL = FALSE;
TRACE(thunk, "LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
module16, (DWORD)TD, module32, thunkfun32, dwReason);
}
else
{
ERR(thunk, "Invalid magic %c%c%c%c\n",
TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
return 0;
}
switch (dwReason)
{
case DLL_PROCESS_ATTACH:
if (directionSL)
{
struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
struct ThunkDataSL *SL = SL16->fpData;
if (SL == NULL)
{
SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
SL->common = SL16->common;
SL->flags1 = SL16->flags1;
SL->flags2 = SL16->flags2;
SL->apiDB = PTR_SEG_TO_LIN(SL16->apiDatabase);
SL->targetDB = NULL;
lstrcpyn32A(SL->pszDll16, module16, 255);
lstrcpyn32A(SL->pszDll32, module32, 255);
/* We should create a SEGPTR to the ThunkDataSL,
but since the contents are not in the original format,
any access to this by 16-bit code would crash anyway. */
SL16->spData = 0;
SL16->fpData = SL;
}
if (SL->flags2 & 0x80000000)
{
TRACE(thunk, "Preloading 32-bit library\n");
LoadLibrary32A(module32);
}
}
else
{
/* nothing to do */
}
break;
case DLL_PROCESS_DETACH:
/* FIXME: cleanup */
break;
}
return 1;
}
/***********************************************************************
* C16ThkSL (KERNEL.630)
*/
void WINAPI C16ThkSL(CONTEXT *context)
{
extern void CallFrom16_t_long_(void);
LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
WORD cs, ds;
GET_CS(cs);
GET_DS(ds);
/* We produce the following code:
*
* mov ax, __FLATDS
* mov es, ax
* movzx ecx, cx
* mov edx, es:[ecx + $EDX]
* push bp
* push edx
* call __FLATCS:CallFrom16_t_long_
*/
*x++ = 0xB8; *((WORD *)x)++ = ds;
*x++ = 0x8E; *x++ = 0xC0;
*x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
*x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
*x++ = 0x91; *((DWORD *)x)++ = EDX_reg(context);
*x++ = 0x55;
*x++ = 0x66; *x++ = 0x52;
*x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
*((WORD *)x)++ = cs;
/* Jump to the stub code just created */
IP_reg(context) = LOWORD(EAX_reg(context));
CS_reg(context) = HIWORD(EAX_reg(context));
/* Since C16ThkSL got called by a jmp, we need to leave the
orginal return address on the stack */
SP_reg(context) -= 4;
}
/***********************************************************************
* C16ThkSL01 (KERNEL.631)
*/
void WINAPI C16ThkSL01(CONTEXT *context)
{
LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
if (stub)
{
struct ThunkDataSL16 *SL16 = PTR_SEG_TO_LIN(EDX_reg(context));
struct ThunkDataSL *td = SL16->fpData;
extern void CallFrom16_t_long_(void);
DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631);
WORD cs;
GET_CS(cs);
if (!td)
{
ERR(thunk, "ThunkConnect16 was not called!\n");
return;
}
TRACE(thunk, "Creating stub for ThunkDataSL %08lx\n", (DWORD)td);
/* We produce the following code:
*
* xor eax, eax
* mov edx, $td
* call C16ThkSL01
* push bp
* push edx
* call __FLATCS:CallFrom16_t_long_
*/
*x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
*x++ = 0x66; *x++ = 0xBA; *((DWORD *)x)++ = (DWORD)td;
*x++ = 0x9A; *((DWORD *)x)++ = procAddress;
*x++ = 0x55;
*x++ = 0x66; *x++ = 0x52;
*x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
*((WORD *)x)++ = cs;
/* Jump to the stub code just created */
IP_reg(context) = LOWORD(EAX_reg(context));
CS_reg(context) = HIWORD(EAX_reg(context));
/* Since C16ThkSL01 got called by a jmp, we need to leave the
orginal return address on the stack */
SP_reg(context) -= 4;
}
else
{
struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context);
DWORD targetNr = CX_reg(context) / 4;
struct SLTargetDB *tdb;
TRACE(thunk, "Process %08lx calling target %ld of ThunkDataSL %08lx\n",
(DWORD)PROCESS_Current(), targetNr, (DWORD)td);
for (tdb = td->targetDB; tdb; tdb = tdb->next)
if (tdb->process == PROCESS_Current())
break;
if (!tdb)
{
TRACE(thunk, "Loading 32-bit library %s\n", td->pszDll32);
LoadLibrary32A(td->pszDll32);
for (tdb = td->targetDB; tdb; tdb = tdb->next)
if (tdb->process == PROCESS_Current())
break;
}
if (tdb)
{
EDX_reg(context) = tdb->targetTable[targetNr];
TRACE(thunk, "Call target is %08lx\n", EDX_reg(context));
}
else
{
WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context));
DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue);
AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue);
IP_reg(context) = stack[2];
CS_reg(context) = stack[3];
SP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4;
ERR(thunk, "Process %08lx did not ThunkConnect32 %s to %s\n",
(DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16);
}
}
}
DWORD WINAPI
WOW16Call(WORD x,WORD y,WORD z) {
int i;
DWORD calladdr;
FIXME(thunk,"(0x%04x,0x%04x,%d),calling (",x,y,z);
for (i=0;i<x/2;i++) {
WORD a = STACK16_POP(THREAD_Current(),2);
DPRINTF("%04x ",a);
}
calladdr = STACK16_POP(THREAD_Current(),4);
DPRINTF(") calling address was 0x%08lx\n",calladdr);
return 0;
}
/***********************************************************************
* 16<->32 Thunklet/Callback API:
*/
#pragma pack(1)
typedef struct _THUNKLET
{
BYTE prefix_target;
BYTE pushl_target;
DWORD target;
BYTE prefix_relay;
BYTE pushl_relay;
DWORD relay;
BYTE jmp_glue;
DWORD glue;
BYTE type;
HINSTANCE16 owner;
struct _THUNKLET *next;
} THUNKLET;
#pragma pack(4)
#define THUNKLET_TYPE_LS 1
#define THUNKLET_TYPE_SL 2
static HANDLE32 ThunkletHeap = 0;
static THUNKLET *ThunkletAnchor = NULL;
static FARPROC32 ThunkletSysthunkGlueLS = 0;
static SEGPTR ThunkletSysthunkGlueSL = 0;
static FARPROC32 ThunkletCallbackGlueLS = 0;
static SEGPTR ThunkletCallbackGlueSL = 0;
/***********************************************************************
* THUNK_ThunkletInit
*/
static BOOL32 THUNK_ThunkletInit( void )
{
LPBYTE thunk;
ThunkletHeap = HeapCreate(HEAP_WINE_SEGPTR | HEAP_WINE_CODE16SEG, 0, 0);
if (!ThunkletHeap) return FALSE;
thunk = HeapAlloc( ThunkletHeap, 0, 5 );
if (!thunk) return FALSE;
ThunkletSysthunkGlueLS = (FARPROC32)thunk;
*thunk++ = 0x58; /* popl eax */
*thunk++ = 0xC3; /* ret */
ThunkletSysthunkGlueSL = HEAP_GetSegptr( ThunkletHeap, 0, thunk );
*thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
*thunk++ = 0xCB; /* lret */
return TRUE;
}
/***********************************************************************
* SetThunkletCallbackGlue (KERNEL.560)
*/
void WINAPI SetThunkletCallbackGlue( FARPROC32 glueLS, SEGPTR glueSL )
{
ThunkletCallbackGlueLS = glueLS;
ThunkletCallbackGlueSL = glueSL;
}
/***********************************************************************
* THUNK_FindThunklet
*/
THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
DWORD glue, BYTE type )
{
THUNKLET *thunk;
for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
if ( thunk->type == type
&& thunk->target == target
&& thunk->relay == relay
&& thunk->glue == glue )
return thunk;
return NULL;
}
/***********************************************************************
* THUNK_AllocLSThunklet
*/
FARPROC32 THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
FARPROC32 glue, HTASK16 owner )
{
THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
THUNKLET_TYPE_LS );
if (!thunk)
{
TDB *pTask = (TDB*)GlobalLock16( owner );
if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
return 0;
thunk->prefix_target = thunk->prefix_relay = 0x90;
thunk->pushl_target = thunk->pushl_relay = 0x68;
thunk->jmp_glue = 0xE9;
thunk->target = (DWORD)target;
thunk->relay = (DWORD)relay;
thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
thunk->type = THUNKLET_TYPE_LS;
thunk->owner = pTask? pTask->hInstance : 0;
thunk->next = ThunkletAnchor;
ThunkletAnchor = thunk;
}
return (FARPROC32)thunk;
}
/***********************************************************************
* THUNK_AllocSLThunklet
*/
SEGPTR THUNK_AllocSLThunklet( FARPROC32 target, DWORD relay,
SEGPTR glue, HTASK16 owner )
{
THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
THUNKLET_TYPE_SL );
if (!thunk)
{
TDB *pTask = (TDB*)GlobalLock16( owner );
if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
return 0;
thunk->prefix_target = thunk->prefix_relay = 0x66;
thunk->pushl_target = thunk->pushl_relay = 0x68;
thunk->jmp_glue = 0xEA;
thunk->target = (DWORD)target;
thunk->relay = (DWORD)relay;
thunk->glue = (DWORD)glue;
thunk->type = THUNKLET_TYPE_SL;
thunk->owner = pTask? pTask->hInstance : 0;
thunk->next = ThunkletAnchor;
ThunkletAnchor = thunk;
}
return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
}
/**********************************************************************
* IsLSThunklet
*/
BOOL16 WINAPI IsLSThunklet( THUNKLET *thunk )
{
return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
&& thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
&& thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
}
/**********************************************************************
* IsSLThunklet (KERNEL.612)
*/
BOOL16 WINAPI IsSLThunklet( THUNKLET *thunk )
{
return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
&& thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
&& thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
}
/***********************************************************************
* AllocLSThunkletSysthunk (KERNEL.607)
*/
FARPROC32 WINAPI AllocLSThunkletSysthunk( SEGPTR target,
FARPROC32 relay, DWORD dummy )
{
return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
ThunkletSysthunkGlueLS, GetCurrentTask() );
}
/***********************************************************************
* AllocSLThunkletSysthunk (KERNEL.608)
*/
SEGPTR WINAPI AllocSLThunkletSysthunk( FARPROC32 target,
SEGPTR relay, DWORD dummy )
{
return THUNK_AllocSLThunklet( (FARPROC32)relay, (DWORD)target,
ThunkletSysthunkGlueSL, GetCurrentTask() );
}
/***********************************************************************
* AllocLSThunkletCallbackEx (KERNEL.567)
*/
FARPROC32 WINAPI AllocLSThunkletCallbackEx( SEGPTR target,
DWORD relay, HTASK16 task )
{
THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
if ( IsSLThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueSL )
return (FARPROC32)thunk->target;
return THUNK_AllocLSThunklet( target, relay,
ThunkletCallbackGlueLS, task );
}
/***********************************************************************
* AllocSLThunkletCallbackEx (KERNEL.568)
*/
SEGPTR WINAPI AllocSLThunkletCallbackEx( FARPROC32 target,
DWORD relay, HTASK16 task )
{
THUNKLET *thunk = (THUNKLET *)target;
if ( IsLSThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueLS )
return (SEGPTR)thunk->target;
return THUNK_AllocSLThunklet( target, relay,
ThunkletCallbackGlueSL, task );
}
/***********************************************************************
* AllocLSThunkletCallback (KERNEL.561) (KERNEL.606)
*/
FARPROC32 WINAPI AllocLSThunkletCallback( SEGPTR target, DWORD relay )
{
return AllocLSThunkletCallbackEx( target, relay, GetCurrentTask() );
}
/***********************************************************************
* AllocSLThunkletCallback (KERNEL.562) (KERNEL.605)
*/
SEGPTR WINAPI AllocSLThunkletCallback( FARPROC32 target, DWORD relay )
{
return AllocSLThunkletCallbackEx( target, relay, GetCurrentTask() );
}
/***********************************************************************
* FindLSThunkletCallback (KERNEL.563) (KERNEL.609)
*/
FARPROC32 WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
{
THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
if ( thunk && IsSLThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueSL )
return (FARPROC32)thunk->target;
thunk = THUNK_FindThunklet( (DWORD)target, relay,
(DWORD)ThunkletCallbackGlueLS,
THUNKLET_TYPE_LS );
return (FARPROC32)thunk;
}
/***********************************************************************
* FindSLThunkletCallback (KERNEL.564) (KERNEL.610)
*/
SEGPTR WINAPI FindSLThunkletCallback( FARPROC32 target, DWORD relay )
{
THUNKLET *thunk = (THUNKLET *)target;
if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueLS )
return (SEGPTR)thunk->target;
thunk = THUNK_FindThunklet( (DWORD)target, relay,
(DWORD)ThunkletCallbackGlueSL,
THUNKLET_TYPE_SL );
return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
}
/***********************************************************************
* Callback Client API
*/
#define N_CBC_FIXED 20
#define N_CBC_VARIABLE 10
#define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
static SEGPTR *CBClientRelay16[ N_CBC_TOTAL ];
static FARPROC32 *CBClientRelay32[ N_CBC_TOTAL ];
/***********************************************************************
* RegisterCBClient (KERNEL.619)
*/
INT16 WINAPI RegisterCBClient( INT16 wCBCId,
SEGPTR *relay16, FARPROC32 *relay32 )
{
/* Search for free Callback ID */
if ( wCBCId == -1 )
for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
if ( !CBClientRelay16[ wCBCId ] )
break;
/* Register Callback ID */
if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
{
CBClientRelay16[ wCBCId ] = relay16;
CBClientRelay32[ wCBCId ] = relay32;
}
else
wCBCId = 0;
return wCBCId;
}
/***********************************************************************
* UnRegisterCBClient (KERNEL.622)
*/
INT16 WINAPI UnRegisterCBClient( INT16 wCBCId,
SEGPTR *relay16, FARPROC32 *relay32 )
{
if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
&& CBClientRelay16[ wCBCId ] == relay16
&& CBClientRelay32[ wCBCId ] == relay32 )
{
CBClientRelay16[ wCBCId ] = 0;
CBClientRelay32[ wCBCId ] = 0;
}
else
wCBCId = 0;
return wCBCId;
}
/***********************************************************************
* InitCBClient (KERNEL.623)
*/
void WINAPI InitCBClient( FARPROC32 glueLS )
{
HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
SEGPTR glueSL = (SEGPTR)WIN32_GetProcAddress16( kernel, (LPCSTR)604 );
SetThunkletCallbackGlue( glueLS, glueSL );
}
/***********************************************************************
* CBClientGlueSL (KERNEL.604)
*/
void WINAPI CBClientGlueSL( CONTEXT *context )
{
/* Create stack frame */
SEGPTR stackSeg = STACK16_PUSH( THREAD_Current(), 12 );
LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg );
SEGPTR glue;
stackLin[3] = BP_reg( context );
stackLin[2] = SI_reg( context );
stackLin[1] = DI_reg( context );
stackLin[0] = DS_reg( context );
BP_reg( context ) = OFFSETOF( stackSeg ) + 6;
SP_reg( context ) = OFFSETOF( stackSeg ) - 4;
GS_reg( context ) = 0;
/* Jump to 16-bit relay code */
glue = CBClientRelay16[ stackLin[5] ][ stackLin[4] ];
CS_reg ( context ) = SELECTOROF( glue );
EIP_reg( context ) = OFFSETOF ( glue );
}
/***********************************************************************
* CBClientThunkSL (KERNEL.620)
*/
void WINAPI CBClientThunkSL( CONTEXT *context )
{
/* Call 32-bit relay code */
extern DWORD WINAPI CALL32_CBClient( FARPROC32 proc, LPWORD args );
LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
FARPROC32 proc = CBClientRelay32[ args[2] ][ args[1] ];
EAX_reg(context) = CALL32_CBClient( proc, args );
}
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