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Sweden-Number/if1632/thunk.c

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/*
* Emulator thunks
*
* Copyright 1996, 1997 Alexandre Julliard
* Copyright 1998 Ulrich Weigand
*/
#include <string.h>
#include "wine/winbase16.h"
#include "task.h"
#include "hook.h"
#include "callback.h"
#include "builtin16.h"
#include "user.h"
#include "heap.h"
#include "neexe.h"
#include "process.h"
#include "stackframe.h"
#include "win.h"
#include "flatthunk.h"
#include "mouse.h"
#include "selectors.h"
#include "keyboard.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(thunk)
/* 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 WORD CALLBACK THUNK_CallTo16_word_ (FARPROC16);
extern WORD CALLBACK THUNK_CallTo16_word_w (FARPROC16,WORD);
extern WORD CALLBACK THUNK_CallTo16_word_l (FARPROC16,LONG);
extern LONG CALLBACK THUNK_CallTo16_long_l (FARPROC16,LONG);
extern WORD CALLBACK THUNK_CallTo16_word_ww (FARPROC16,WORD,WORD);
extern LONG CALLBACK THUNK_CallTo16_long_ll (FARPROC16,LONG,LONG);
extern WORD CALLBACK THUNK_CallTo16_word_www (FARPROC16,WORD,WORD,WORD);
extern WORD CALLBACK THUNK_CallTo16_word_lllw (FARPROC16,LONG,LONG,LONG,WORD);
extern WORD CALLBACK THUNK_CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD);
extern WORD CALLBACK THUNK_CallTo16_word_wlww (FARPROC16,WORD,LONG,WORD,WORD);
extern WORD CALLBACK THUNK_CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
extern LONG CALLBACK THUNK_CallTo16_long_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
extern WORD CALLBACK THUNK_CallTo16_word_lwwww(FARPROC16,LONG,WORD,WORD,WORD,WORD);
/* ### stop build ### */
static THUNK *firstThunk = NULL;
static BOOL THUNK_ThunkletInit( void );
/* Callbacks function table for the emulator */
static const CALLBACKS_TABLE CALLBACK_EmulatorTable =
{
(void *)CallTo16RegisterShort, /* CallRegisterShortProc */
(void *)CallTo16RegisterLong, /* CallRegisterLongProc */
(void *)THUNK_CallTo16_word_w, /* CallWindowsExitProc */
(void *)THUNK_CallTo16_word_lwww, /* CallWordBreakProc */
(void *)THUNK_CallTo16_word_ww, /* CallBootAppProc */
(void *)THUNK_CallTo16_word_www, /* CallLoadAppSegProc */
(void *)THUNK_CallTo16_word_www, /* CallLocalNotifyFunc */
(void *)THUNK_CallTo16_word_www, /* CallResourceHandlerProc */
(void *)THUNK_CallTo16_long_ll, /* CallUTProc */
(void *)THUNK_CallTo16_long_l /* CallASPIPostProc */
};
const CALLBACKS_TABLE *Callbacks = &CALLBACK_EmulatorTable;
CALLOUT_TABLE Callout = { 0 };
/***********************************************************************
* THUNK_Init
*/
BOOL THUNK_Init(void)
{
/* Initialize Thunklets */
return THUNK_ThunkletInit();
}
/***********************************************************************
* THUNK_Alloc
*/
FARPROC THUNK_Alloc( FARPROC16 func, RELAY relay )
{
HANDLE16 hSeg;
NE_MODULE *pModule;
THUNK *thunk;
/* NULL maps to NULL */
if ( !func ) return NULL;
/*
* If we got an 16-bit built-in API entry point, retrieve the Wine
* 32-bit handler for that API routine.
*
* NOTE: For efficiency reasons, we only check whether the selector
* of 'func' points to the code segment of a built-in module.
* It might be theoretically possible that the offset is such
* that 'func' does not point, in fact, to an API entry point.
* In this case, however, the pointer is corrupt anyway.
*/
hSeg = GlobalHandle16( SELECTOROF( func ) );
pModule = NE_GetPtr( FarGetOwner16( hSeg ) );
if ( pModule && (pModule->flags & NE_FFLAGS_BUILTIN)
&& NE_SEG_TABLE(pModule)[0].hSeg == hSeg )
{
FARPROC proc = (FARPROC)((ENTRYPOINT16 *)PTR_SEG_TO_LIN( func ))->target;
TRACE( "(%04x:%04x, %p) -> built-in API %p\n",
SELECTOROF( func ), OFFSETOF( func ), relay, proc );
return proc;
}
/* Otherwise, we need to alloc a 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->magic = CALLTO16_THUNK_MAGIC;
thunk->next = firstThunk;
firstThunk = thunk;
}
TRACE( "(%04x:%04x, %p) -> allocated thunk %p\n",
SELECTOROF( func ), OFFSETOF( func ), relay, thunk );
return (FARPROC)thunk;
}
/***********************************************************************
* THUNK_Free
*/
void THUNK_Free( FARPROC thunk )
{
THUNK *t = (THUNK*)thunk;
if ( !t || IsBadReadPtr( t, sizeof(*t) )
|| t->magic != CALLTO16_THUNK_MAGIC )
return;
if (HEAP_IsInsideHeap( GetProcessHeap(), 0, t ))
{
THUNK **prev = &firstThunk;
while (*prev && (*prev != t)) prev = &(*prev)->next;
if (*prev)
{
*prev = t->next;
HeapFree( GetProcessHeap(), 0, t );
return;
}
}
ERR("invalid thunk addr %p\n", thunk );
return;
}
/***********************************************************************
* THUNK_GetCalloutThunk
*
* Retrieve API entry point with given name from given module.
* If module is builtin, return the 32-bit entry point, otherwise
* create a 32->16 thunk to the 16-bit entry point, using the
* given relay code.
*
*/
static FARPROC THUNK_GetCalloutThunk( NE_MODULE *pModule, LPSTR name, RELAY relay )
{
FARPROC16 proc = WIN32_GetProcAddress16( pModule->self, name );
if ( !proc ) return 0;
if ( pModule->flags & NE_FFLAGS_BUILTIN )
return (FARPROC)((ENTRYPOINT16 *)PTR_SEG_TO_LIN( proc ))->target;
else
return (FARPROC)THUNK_Alloc( proc, relay );
}
/***********************************************************************
* THUNK_InitCallout
*/
void THUNK_InitCallout(void)
{
HMODULE hModule;
NE_MODULE *pModule;
hModule = GetModuleHandleA( "USER32" );
if ( hModule )
{
#define GETADDR( name ) \
*(FARPROC *)&Callout.##name = GetProcAddress( hModule, #name )
GETADDR( PeekMessageA );
GETADDR( PeekMessageW );
GETADDR( GetMessageA );
GETADDR( GetMessageW );
GETADDR( SendMessageA );
GETADDR( SendMessageW );
GETADDR( PostMessageA );
GETADDR( PostMessageW );
GETADDR( PostThreadMessageA );
GETADDR( PostThreadMessageW );
GETADDR( TranslateMessage );
GETADDR( DispatchMessageW );
GETADDR( DispatchMessageA );
GETADDR( RedrawWindow );
GETADDR( WaitForInputIdle );
GETADDR( MessageBoxA );
GETADDR( MessageBoxW );
#undef GETADDR
}
pModule = NE_GetPtr( GetModuleHandle16( "USER" ) );
if ( pModule )
{
#define GETADDR( var, name, thk ) \
*(FARPROC *)&Callout.##var = THUNK_GetCalloutThunk( pModule, name, \
(RELAY)THUNK_CallTo16_##thk )
GETADDR( PeekMessage16, "PeekMessage", word_lwwww );
GETADDR( GetMessage16, "GetMessage", word_lwww );
GETADDR( SendMessage16, "SendMessage", long_wwwl );
GETADDR( PostMessage16, "PostMessage", word_wwwl );
GETADDR( PostAppMessage16, "PostAppMessage", word_wwwl );
GETADDR( TranslateMessage16, "TranslateMessage", word_l );
GETADDR( DispatchMessage16, "DispatchMessage", long_l );
GETADDR( RedrawWindow16, "RedrawWindow", word_wlww );
GETADDR( FinalUserInit16, "FinalUserInit", word_ );
GETADDR( InitApp16, "InitApp", word_w );
GETADDR( InitThreadInput16, "InitThreadInput", word_ww );
GETADDR( UserYield16, "UserYield", word_ );
GETADDR( DestroyIcon32, "DestroyIcon32", word_ww );
GETADDR( UserSignalProc, "SignalProc32", word_lllw );
#undef GETADDR
}
}
/***********************************************************************
* 16->32 Flat Thunk routines:
*/
/***********************************************************************
* ThunkConnect16 (KERNEL.651)
* Connects a 32bit and a 16bit thunkbuffer.
*/
UINT 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 */
) {
BOOL directionSL;
if (!strncmp(TD->magic, "SL01", 4))
{
directionSL = TRUE;
TRACE("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
module16, (DWORD)TD, module32, thunkfun32, dwReason);
}
else if (!strncmp(TD->magic, "LS01", 4))
{
directionSL = FALSE;
TRACE("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
module16, (DWORD)TD, module32, thunkfun32, dwReason);
}
else
{
ERR("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;
lstrcpynA(SL->pszDll16, module16, 255);
lstrcpynA(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("Preloading 32-bit library\n");
LoadLibraryA(module32);
}
}
else
{
/* nothing to do */
}
break;
case DLL_PROCESS_DETACH:
/* FIXME: cleanup */
break;
}
return 1;
}
/***********************************************************************
* C16ThkSL (KERNEL.630)
*/
void WINAPI C16ThkSL(CONTEXT86 *context)
{
LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
WORD cs = __get_cs();
WORD ds = __get_ds();
/* We produce the following code:
*
* mov ax, __FLATDS
* mov es, ax
* movzx ecx, cx
* mov edx, es:[ecx + $EDX]
* push bp
* push edx
* push dx
* push edx
* call __FLATCS:CallFrom16Thunk
*/
*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++ = 0x52;
*x++ = 0x66; *x++ = 0x52;
*x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk;
*((WORD *)x)++ = cs;
/* Jump to the stub code just created */
EIP_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
original return address on the stack */
ESP_reg(context) -= 4;
}
/***********************************************************************
* C16ThkSL01 (KERNEL.631)
*/
void WINAPI C16ThkSL01(CONTEXT86 *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;
DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631);
WORD cs = __get_cs();
if (!td)
{
ERR("ThunkConnect16 was not called!\n");
return;
}
TRACE("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
* push dx
* push edx
* call __FLATCS:CallFrom16Thunk
*/
*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++ = 0x52;
*x++ = 0x66; *x++ = 0x52;
*x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk;
*((WORD *)x)++ = cs;
/* Jump to the stub code just created */
EIP_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 */
ESP_reg(context) -= 4;
}
else
{
struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context);
DWORD targetNr = CX_reg(context) / 4;
struct SLTargetDB *tdb;
TRACE("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("Loading 32-bit library %s\n", td->pszDll32);
LoadLibraryA(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("Call target is %08lx\n", EDX_reg(context));
}
else
{
WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), LOWORD(ESP_reg(context)));
DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue);
AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue);
EIP_reg(context) = stack[2];
CS_reg(context) = stack[3];
ESP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4;
ERR("Process %08lx did not ThunkConnect32 %s to %s\n",
(DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16);
}
}
}
/***********************************************************************
* 16<->32 Thunklet/Callback API:
*/
#include "pshpack1.h"
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;
#include "poppack.h"
#define THUNKLET_TYPE_LS 1
#define THUNKLET_TYPE_SL 2
static HANDLE ThunkletHeap = 0;
static THUNKLET *ThunkletAnchor = NULL;
static FARPROC ThunkletSysthunkGlueLS = 0;
static SEGPTR ThunkletSysthunkGlueSL = 0;
static FARPROC ThunkletCallbackGlueLS = 0;
static SEGPTR ThunkletCallbackGlueSL = 0;
/***********************************************************************
* THUNK_ThunkletInit
*/
static BOOL 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 = (FARPROC)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 SetThunkletCallbackGlue16( FARPROC 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
&& ( type == THUNKLET_TYPE_LS ?
( thunk->glue == glue - (DWORD)&thunk->type )
: ( thunk->glue == glue ) ) )
return thunk;
return NULL;
}
/***********************************************************************
* THUNK_AllocLSThunklet
*/
FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
FARPROC 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 (FARPROC)thunk;
}
/***********************************************************************
* THUNK_AllocSLThunklet
*/
SEGPTR THUNK_AllocSLThunklet( FARPROC 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 IsSLThunklet16( 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)
*/
FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
FARPROC relay, DWORD dummy )
{
return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
ThunkletSysthunkGlueLS, GetCurrentTask() );
}
/***********************************************************************
* AllocSLThunkletSysthunk (KERNEL.608)
*/
SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
SEGPTR relay, DWORD dummy )
{
return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
ThunkletSysthunkGlueSL, GetCurrentTask() );
}
/***********************************************************************
* AllocLSThunkletCallbackEx (KERNEL.567)
*/
FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
DWORD relay, HTASK16 task )
{
THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
if ( !thunk ) return NULL;
if ( IsSLThunklet16( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueSL )
return (FARPROC)thunk->target;
return THUNK_AllocLSThunklet( target, relay,
ThunkletCallbackGlueLS, task );
}
/***********************************************************************
* AllocSLThunkletCallbackEx (KERNEL.568)
*/
SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
DWORD relay, HTASK16 task )
{
THUNKLET *thunk = (THUNKLET *)target;
if ( !thunk ) return 0;
if ( IsLSThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
return (SEGPTR)thunk->target;
return THUNK_AllocSLThunklet( target, relay,
ThunkletCallbackGlueSL, task );
}
/***********************************************************************
* AllocLSThunkletCallback (KERNEL.561) (KERNEL.606)
*/
FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
{
return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
}
/***********************************************************************
* AllocSLThunkletCallback (KERNEL.562) (KERNEL.605)
*/
SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
{
return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
}
/***********************************************************************
* FindLSThunkletCallback (KERNEL.563) (KERNEL.609)
*/
FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
{
THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueSL )
return (FARPROC)thunk->target;
thunk = THUNK_FindThunklet( (DWORD)target, relay,
(DWORD)ThunkletCallbackGlueLS,
THUNKLET_TYPE_LS );
return (FARPROC)thunk;
}
/***********************************************************************
* FindSLThunkletCallback (KERNEL.564) (KERNEL.610)
*/
SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
{
THUNKLET *thunk = (THUNKLET *)target;
if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
&& thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
return (SEGPTR)thunk->target;
thunk = THUNK_FindThunklet( (DWORD)target, relay,
(DWORD)ThunkletCallbackGlueSL,
THUNKLET_TYPE_SL );
return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
}
/***********************************************************************
* FreeThunklet16 (KERNEL.611)
*/
BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
{
return FALSE;
}
/***********************************************************************
* 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 FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
/***********************************************************************
* RegisterCBClient (KERNEL.619)
*/
INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
SEGPTR relay16, FARPROC *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 UnRegisterCBClient16( INT16 wCBCId,
SEGPTR relay16, FARPROC *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 InitCBClient16( FARPROC glueLS )
{
HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
SEGPTR glueSL = (SEGPTR)WIN32_GetProcAddress16( kernel, (LPCSTR)604 );
SetThunkletCallbackGlue16( glueLS, glueSL );
}
/***********************************************************************
* CBClientGlueSL (KERNEL.604)
*/
void WINAPI CBClientGlueSL( CONTEXT86 *context )
{
/* Create stack frame */
SEGPTR stackSeg = stack16_push( 12 );
LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg );
SEGPTR glue, *glueTab;
stackLin[3] = BP_reg( context );
stackLin[2] = SI_reg( context );
stackLin[1] = DI_reg( context );
stackLin[0] = DS_reg( context );
EBP_reg( context ) = OFFSETOF( stackSeg ) + 6;
ESP_reg( context ) = OFFSETOF( stackSeg ) - 4;
GS_reg( context ) = 0;
/* Jump to 16-bit relay code */
glueTab = PTR_SEG_TO_LIN( CBClientRelay16[ stackLin[5] ] );
glue = glueTab[ stackLin[4] ];
CS_reg ( context ) = SELECTOROF( glue );
EIP_reg( context ) = OFFSETOF ( glue );
}
/***********************************************************************
* CBClientThunkSL (KERNEL.620)
*/
extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi );
void WINAPI CBClientThunkSL( CONTEXT86 *context )
{
/* Call 32-bit relay code */
LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
EAX_reg(context) = CALL32_CBClient( proc, args, &ESI_reg( context ) );
}
/***********************************************************************
* CBClientThunkSLEx (KERNEL.621)
*/
extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs );
void WINAPI CBClientThunkSLEx( CONTEXT86 *context )
{
/* Call 32-bit relay code */
LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
INT nArgs;
LPWORD stackLin;
EAX_reg(context) = CALL32_CBClientEx( proc, args, &ESI_reg( context ), &nArgs );
/* Restore registers saved by CBClientGlueSL */
stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
BP_reg( context ) = stackLin[3];
SI_reg( context ) = stackLin[2];
DI_reg( context ) = stackLin[1];
DS_reg( context ) = stackLin[0];
ESP_reg( context ) += 16+nArgs;
/* Return to caller of CBClient thunklet */
CS_reg ( context ) = stackLin[9];
EIP_reg( context ) = stackLin[8];
}
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