wine/win32/kernel32.c
Alexandre Julliard c7c217b31c Release 980413
Sun Apr 12 12:22:23 1997  Andreas Mohr <100.30936@germany.net>

	* [files/drive.c]
	Fixed "no free space" problem with partition sizes between 1 and 2 GB
	(cluster_sectors may not exceed 0x40).

	* [windows/msgbox.c] [if1632/user.spec] [include/windows.h]
	Implemented MessageBoxIndirect16, corrected MSGBOXPARAMS16.

	* [loader/task.c]
	DOS environment strings may never exceed 127 chars
	-> truncate Unix environment strings if necessary.

Sun Apr 12 02:51:44 1998  Dimitrie O. Paun  <dimi@mail.cs.toronto.edu>

	* [files/*.c]
	All fprintf statements were converted to appropriate debug
	messages.

	* [tools/find_debug_channels]
	Updated comments at the beginning of the file.

Sat Apr 11 15:27:21 1998  Alexandre Julliard  <julliard@lrc.epfl.ch>

	* [loader/module.c] [loader/task.c] [scheduler/process.c]
	Moved some code around to prepare the ground for CreateProcess().

	* [memory/environ.c] [loader/task.c]
	Moved Win32 environment strings functions to environ.c.
	Unified Win16 and Win32 environment management.

	* [scheduler/handle.c] [scheduler/k32obj.c] [scheduler/*.c]
	Implemented handle inheritance and DuplicateHandle().

	* [scheduler/thread.c]
	Create a 16-bit stack for all threads.

	* [windows/dialog.c]
	Implemented DIALOGEX resource format.

Fri Apr 10 20:21:51 1998  Marcus Meissner <marcus@mud.de>

	* [configure.in][include/acconfig.h][*/*][multimedia/*]
	Cleaned up the OSS detection stuff, added some more checks for
	headerfiles/functions.
	Removed a lot of OS specific #ifdefs.
	Lots of dependend multimedia cleanups.

	* [loader/pe_image.c]
	Enhanced comment, added missing reference count increase.

	* [ole/compobj.c]
	Replaced broken StringFromGUID2 by working one.

	* [misc/winsock.c]
	SO_LINGER uses unsigned 16 bit in Win16 and Win32, but unsigned
	int (32bit) for UNIX.

	* [memory/global.c]
	Allow realloc for lockcount 1 too.

Fri Apr 10 15:27:34 1998  Morten Welinder  <terra@diku.dk>

	* [graphics/x11drv/text.c]
	Handle control characters in trace.  Ignore terminating newline.

	* [multimedia/init.c]
	(MULTIMEDIA_Init): Correct allocations.

	* [tools/examine-relay]
 	Tidy up.

	* [windows/syscolor.c]
	Change highlight colour from lightblue to lightgray.  This
	looks correct for menus.

Fri Apr 10 01:49:58 1998  Douglas Ridgway  <ridgway@winehq.com>

	* [configure.in] [Make.rules.in]
	Add check for c2man before using it.

Fri Apr 10 02:59:21 1998  Douglas Ridgway  <ridgway@winehq.com>

	* [DEVELOPERS-HINTS]
	Simple description of adding API calls.

	* [include/wintypes.h] [include/windows.h]
	Get rid of Winelib16, avoid declaring some illegal functions in
	Winelib, add prototypes for some enhanced metafile functions, fix
	GetTextExtentPoint32 declarations.

	* [relay32/gdi32.spec] [objects/enhmetafile.c]
	Cosmetic and functional improvements.

	* [include/wincon.h] [programs/view/*]
	Fixes, improved compatibility with native compilers.

Thu Apr  9 15:48:49 1998  Ulrich Weigand <weigand@informatik.uni-erlangen.de>

	* [win32/kernel32.c]
	Implemented FT_Thunk / FT_Prolog / FT_Exit / FT_PrologPrime.
	Fixed Common32ThkLS thunk function.

	* [tools/build.c] [relay32/relay386.c] [if1632/relay.c]
	Changed relay code to allow register functions to modify stack layout.

	* [memory/selector.c]
	Implemented AllocMappedBuffer / FreeMappedBuffer.

	* [relay32/kernel32.spec] [if1632/kernel.spec] [win32/ordinals.c]
	Added names for undocumented functions.

	* [loader/module.c]
	Bugfix: LoadLibrary16 should *not* silently load 32-bit DLL.

Thu Apr  9 03:54:58 1998  Jim Peterson <jspeter@birch.ee.vt.edu>

	* [windows/keyboard.c]
	Fix an erroneous test in TranslateAccelerator{16,32} for the end
	of the accelerator table.

Thu Apr  8 20:36:28 1998  Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> 

	* [misc/crtdll.c]
	Implement getenv.

	* [misc/commdlg.c]
	Make Get[Save/Open]FileName work in most situations.

	* [misc/lstr.c]
	Use wvsprintf32A instead of vsprintf in FormatMessage32X

	* [misc/version]
	Make NT3.50 a recognised version

	* [graphics/x11drv/graphics.c]
	Change the algorithme to draw arcs

	* [loader/resource.c]
	Return an empty buffer in LoadString32A if no resource found.

	* [win32/code_page.c]
	Try harder to get the right size in MultiByteToWideChar.

	* [win32/process.c]
	Call WinExec32 for CreateProcess32A.

	* [windows/user.c]
	Install default Int0 Handler in InitApp().

Thu Apr  8 19:29:48 1998  Eric Kohl <ekohl@abo.rhein-zeitung.de>

	* [misc/imagelist.c]
	Preliminary fix for drawing selected images.
	Various improvements.

	* [controls/progress.c][include/progress.c][include/commctrl.h]
	Added progress bar messages and styles for IE4.01 (dll version 4.72)
	compatibility.
	Fixed led size problem.

	* [controls/updown.c][include/commctrl.h]
	Added UDM_GETRANGE32 and UDM_SETRANGE32.

	* [objects/oembitmaps.c][include/windows.h][include/bitmaps/*]
	Added Win95 icons and fixed Win95 cursor and restore button bug.
	Now they should be visible. Sorry!!!

	* [relay32/comctl32.spec]
	Added most missing function names.

Tue Apr  6 18:48:36 1998  Matthew Becker <mbecker@glasscity.net>

	* [objects/font.c] [if1632/gdi.spec]
	GetOutlineTextMetrics: stub

	* [objects/text.c]
	GetTextCharset should just call GetTextCharsetInfo.

	* [misc/mpr.c] [relay32/mpr.spec]
	WNetCachePassword: stub

	* [scheduler/thread.c] [relay32/user32.spec]
	AttachThreadInput: stub
	Updated documentation.

	* [objects/palette.c]
	Updated documentation.

Tue Mar 31 17:06:30 1998  James Juran <jrj120@psu.edu>

	* [*/*.c]
	Finished fixing USER32 ordinal numbers in function documentation.

Mon Mar 30 20:27:38 1998  Morten Welinder  <terra@diku.dk>

	* [misc/debugstr.c] [include/debugstr.h]
	Moved _dumpstr from relay32/relay386.c.  Improved control
	character handling.

	* [msdos/int21.c]
	Implement 215E00 -- get machine name.

	* [windows/winpos.c]
	SetWindowPos32: Make an extra sync when mapping managed
	windows.  This makes sure the reconfigure event has been
	handled.  See Mshearts' what's-your-name window.

Mon Mar 30 01:13:50 1998  Alexander V. Lukyanov <lav@long.yar.ru>

	* [Makefile.in]
	Install includes from TOPSRCDIR.
1998-04-13 12:21:30 +00:00

1027 lines
32 KiB
C

/*
* KERNEL32 thunks and other undocumented stuff
*
* Copyright 1997-1998 Marcus Meissner
* Copyright 1998 Ulrich Weigand
*/
#include <stdio.h>
#include "windows.h"
#include "callback.h"
#include "resource.h"
#include "task.h"
#include "user.h"
#include "heap.h"
#include "module.h"
#include "process.h"
#include "stackframe.h"
#include "heap.h"
#include "selectors.h"
#include "task.h"
#include "win.h"
#include "debug.h"
/***********************************************************************
* *
* Win95 internal thunks *
* *
***********************************************************************/
/***********************************************************************
* Generates a FT_Prolog call.
*
* 0FB6D1 movzbl edx,cl
* 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
* 68xxxxxxxx push FT_Prolog
* C3 lret
*/
static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
LPBYTE x;
x = relayCode;
*x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
*x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
x+=4; /* mov edx, [4*edx + targetTable] */
*x++ = 0x68; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"FT_Prolog");
x+=4; /* push FT_Prolog */
*x++ = 0xC3; /* lret */
/* fill rest with 0xCC / int 3 */
}
/***********************************************************************
* _write_qtthunk (internal)
* Generates a QT_Thunk style call.
*
* 33C9 xor ecx, ecx
* 8A4DFC mov cl , [ebp-04]
* 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
* B8yyyyyyyy mov eax, QT_Thunk
* FFE0 jmp eax
*/
static void _write_qtthunk(
LPBYTE relayCode, /* [in] start of QT_Thunk stub */
DWORD *targetTable /* [in] start of thunk (for index lookup) */
) {
LPBYTE x;
x = relayCode;
*x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
*x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
*x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
x+=4; /* mov edx, [4*ecx + targetTable */
*x++ = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"QT_Thunk");
x+=4; /* mov eax , QT_Thunk */
*x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
/* should fill the rest of the 32 bytes with 0xCC */
}
struct thunkstruct
{
char magic[4];
DWORD length;
DWORD ptr;
DWORD x0C;
DWORD x10;
DWORD x14;
DWORD x18;
DWORD x1C;
DWORD x20;
};
/***********************************************************************
* ThunkConnect32 (KERNEL32)
* Connects a 32bit and a 16bit thunkbuffer.
*/
UINT32 WINAPI ThunkConnect32(
struct thunkstruct *ths, /* [in/out] thunkbuffer */
LPCSTR thunkfun16, /* [in] win16 thunkfunction */
LPCSTR module16, /* [in] name of win16 dll */
LPCSTR module32, /* [in] name of win32 dll */
HMODULE32 hmod32, /* [in] hmodule of win32 dll (used?) */
DWORD dllinitarg1 /* [in] initialisation argument */
) {
HINSTANCE16 hmm;
SEGPTR thkbuf;
struct thunkstruct *ths16;
TRACE(thunk,"(<struct>,%s,%s,%s,%x,%lx)\n",
thunkfun16,module32,module16,hmod32,dllinitarg1
);
TRACE(thunk," magic = %c%c%c%c\n",
ths->magic[0],
ths->magic[1],
ths->magic[2],
ths->magic[3]
);
TRACE(thunk," length = %lx\n",ths->length);
if (lstrncmp32A(ths->magic,"SL01",4)&&lstrncmp32A(ths->magic,"LS01",4))
return 0;
hmm=LoadModule16(module16,NULL);
if (hmm<=32)
return 0;
thkbuf=(SEGPTR)WIN32_GetProcAddress16(hmm,thunkfun16);
if (!thkbuf)
return 0;
ths16=(struct thunkstruct*)PTR_SEG_TO_LIN(thkbuf);
if (lstrncmp32A(ths16->magic,ths->magic,4))
return 0;
if (!lstrncmp32A(ths->magic,"SL01",4)) {
if (ths16->length != ths->length)
return 0;
ths->x0C = (DWORD)ths16;
TRACE(thunk," ths16 magic is 0x%08lx\n",*(DWORD*)ths16->magic);
if (*((DWORD*)ths16->magic) != 0x0000304C)
return 0;
if (!*(WORD*)(((LPBYTE)ths16)+0x12))
return 0;
}
if (!lstrncmp32A(ths->magic,"LS01",4)) {
if (ths16->length != ths->length)
return 0;
ths->ptr = (DWORD)PTR_SEG_TO_LIN(ths16->ptr);
/* code offset for QT_Thunk is at 0x1C... */
_write_qtthunk (((LPBYTE)ths) + ths->x1C,(DWORD *)ths->ptr);
/* code offset for FT_Prolog is at 0x20... */
_write_ftprolog(((LPBYTE)ths) + ths->x20,(DWORD *)ths->ptr);
return 1;
}
return TRUE;
}
/**********************************************************************
* QT_Thunk (KERNEL32)
*
* The target address is in EDX.
* The 16 bit arguments start at ESP+4.
* The number of 16bit argumentbytes is EBP-ESP-0x44 (68 Byte thunksetup).
* [ok]
*/
VOID WINAPI QT_Thunk(CONTEXT *context)
{
CONTEXT context16;
DWORD argsize;
THDB *thdb = THREAD_Current();
memcpy(&context16,context,sizeof(context16));
CS_reg(&context16) = HIWORD(EDX_reg(context));
IP_reg(&context16) = LOWORD(EDX_reg(context));
EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
+ (WORD)&((STACK16FRAME*)0)->bp;
argsize = EBP_reg(context)-ESP_reg(context)-0x44;
memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
(LPBYTE)ESP_reg(context)+4, argsize );
EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
}
/**********************************************************************
* FT_Prolog (KERNEL32.233)
*
* The set of FT_... thunk routines is used instead of QT_Thunk,
* if structures have to be converted from 32-bit to 16-bit
* (change of member alignment, conversion of members).
*
* The thunk function (as created by the thunk compiler) calls
* FT_Prolog at the beginning, to set up a stack frame and
* allocate a 64 byte buffer on the stack.
* The input parameters (target address and some flags) are
* saved for later use by FT_Thunk.
*
* Input: EDX 16-bit target address (SEGPTR)
* CX bits 0..7 target number (in target table)
* bits 8..9 some flags (unclear???)
* bits 10..15 number of DWORD arguments
*
* Output: A new stackframe is created, and a 64 byte buffer
* allocated on the stack. The layout of the stack
* on return is as follows:
*
* (ebp+4) return address to caller of thunk function
* (ebp) old EBP
* (ebp-4) saved EBX register of caller
* (ebp-8) saved ESI register of caller
* (ebp-12) saved EDI register of caller
* (ebp-16) saved ECX register, containing flags
* (ebp-20) bitmap containing parameters that are to be converted
* by FT_Thunk; it is initialized to 0 by FT_Prolog and
* filled in by the thunk code before calling FT_Thunk
* (ebp-24)
* ... (unclear)
* (ebp-44)
* (ebp-48) saved EAX register of caller (unclear, never restored???)
* (ebp-52) saved EDX register, containing 16-bit thunk target
* (ebp-56)
* ... (unclear)
* (ebp-64)
*
* ESP is EBP-68 on return.
*
*/
#define POP_DWORD(ctx) (*((DWORD *)ESP_reg(ctx))++)
#define PUSH_DWORD(ctx, val) *--((DWORD *)ESP_reg(ctx)) = (val)
VOID WINAPI FT_Prolog(CONTEXT *context)
{
/* Pop return address to thunk code */
EIP_reg(context) = POP_DWORD(context);
/* Build stack frame */
PUSH_DWORD(context, EBP_reg(context));
EBP_reg(context) = ESP_reg(context);
/* Allocate 64-byte Thunk Buffer */
ESP_reg(context) -= 64;
memset((char *)ESP_reg(context), '\0', 64);
/* Store Flags (ECX) and Target Address (EDX) */
/* Save other registers to be restored later */
*(DWORD *)(EBP_reg(context) - 4) = EBX_reg(context);
*(DWORD *)(EBP_reg(context) - 8) = ESI_reg(context);
*(DWORD *)(EBP_reg(context) - 12) = EDI_reg(context);
*(DWORD *)(EBP_reg(context) - 16) = ECX_reg(context);
*(DWORD *)(EBP_reg(context) - 48) = EAX_reg(context);
*(DWORD *)(EBP_reg(context) - 52) = EDX_reg(context);
/* Push return address back onto stack */
PUSH_DWORD(context, EIP_reg(context));
}
/**********************************************************************
* FT_Thunk (KERNEL32.234)
*
* This routine performs the actual call to 16-bit code,
* similar to QT_Thunk. The differences are:
* - The call target is taken from the buffer created by FT_Prolog
* - Those arguments requested by the thunk code (by setting the
* corresponding bit in the bitmap at EBP-20) are converted
* from 32-bit pointers to segmented pointers (those pointers
* are guaranteed to point to structures copied to the stack
* by the thunk code, so we always use the 16-bit stack selector
* for those addresses).
*
* The bit #i of EBP-20 corresponds here to the DWORD starting at
* ESP+4 + 2*i.
*
* FIXME: It is unclear what happens if there are more than 32 WORDs
* of arguments, so that the single DWORD bitmap is no longer
* sufficient ...
*/
VOID WINAPI FT_Thunk(CONTEXT *context)
{
DWORD mapESPrelative = *(DWORD *)(EBP_reg(context) - 20);
DWORD callTarget = *(DWORD *)(EBP_reg(context) - 52);
CONTEXT context16;
DWORD i, argsize;
LPBYTE newstack;
THDB *thdb = THREAD_Current();
memcpy(&context16,context,sizeof(context16));
CS_reg(&context16) = HIWORD(callTarget);
IP_reg(&context16) = LOWORD(callTarget);
EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
+ (WORD)&((STACK16FRAME*)0)->bp;
argsize = EBP_reg(context)-ESP_reg(context)-0x44;
newstack = ((LPBYTE)THREAD_STACK16(thdb))-argsize;
memcpy( newstack, (LPBYTE)ESP_reg(context)+4, argsize );
for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
if (mapESPrelative & (1 << i))
{
SEGPTR *arg = (SEGPTR *)(newstack + 2*i);
*arg = PTR_SEG_OFF_TO_SEGPTR(SELECTOROF(thdb->cur_stack),
*(LPBYTE *)arg - newstack);
}
EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
}
/**********************************************************************
* FT_ExitNN (KERNEL32.218 - 232)
*
* One of the FT_ExitNN functions is called at the end of the thunk code.
* It removes the stack frame created by FT_Prolog, moves the function
* return from EBX to EAX (yes, FT_Thunk did use EAX for the return
* value, but the thunk code has moved it from EAX to EBX in the
* meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
* and perform a return to the CALLER of the thunk code (while removing
* the given number of arguments from the caller's stack).
*/
VOID WINAPI FT_Exit(CONTEXT *context, int nPopArgs)
{
/* Return value is in EBX */
EAX_reg(context) = EBX_reg(context);
/* Restore EBX, ESI, and EDI registers */
EBX_reg(context) = *(DWORD *)(EBP_reg(context) - 4);
ESI_reg(context) = *(DWORD *)(EBP_reg(context) - 8);
EDI_reg(context) = *(DWORD *)(EBP_reg(context) - 12);
/* Clean up stack frame */
ESP_reg(context) = EBP_reg(context);
EBP_reg(context) = POP_DWORD(context);
/* Pop return address to CALLER of thunk code */
EIP_reg(context) = POP_DWORD(context);
/* Remove arguments */
ESP_reg(context) += nPopArgs;
/* Push return address back onto stack */
PUSH_DWORD(context, EIP_reg(context));
}
VOID WINAPI FT_Exit0 (CONTEXT *context) { FT_Exit(context, 0); }
VOID WINAPI FT_Exit4 (CONTEXT *context) { FT_Exit(context, 4); }
VOID WINAPI FT_Exit8 (CONTEXT *context) { FT_Exit(context, 8); }
VOID WINAPI FT_Exit12(CONTEXT *context) { FT_Exit(context, 12); }
VOID WINAPI FT_Exit16(CONTEXT *context) { FT_Exit(context, 16); }
VOID WINAPI FT_Exit20(CONTEXT *context) { FT_Exit(context, 20); }
VOID WINAPI FT_Exit24(CONTEXT *context) { FT_Exit(context, 24); }
VOID WINAPI FT_Exit28(CONTEXT *context) { FT_Exit(context, 28); }
VOID WINAPI FT_Exit32(CONTEXT *context) { FT_Exit(context, 32); }
VOID WINAPI FT_Exit36(CONTEXT *context) { FT_Exit(context, 36); }
VOID WINAPI FT_Exit40(CONTEXT *context) { FT_Exit(context, 40); }
VOID WINAPI FT_Exit44(CONTEXT *context) { FT_Exit(context, 44); }
VOID WINAPI FT_Exit48(CONTEXT *context) { FT_Exit(context, 48); }
VOID WINAPI FT_Exit52(CONTEXT *context) { FT_Exit(context, 52); }
VOID WINAPI FT_Exit56(CONTEXT *context) { FT_Exit(context, 56); }
/**********************************************************************
* WOWCallback16 (KERNEL32.62)(WOW32.2)
* Calls a win16 function with a single DWORD argument.
* RETURNS
* the return value
*/
DWORD WINAPI WOWCallback16(
FARPROC16 fproc, /* [in] win16 function to call */
DWORD arg /* [in] single DWORD argument to function */
) {
DWORD ret;
TRACE(thunk,"(%p,0x%08lx)...\n",fproc,arg);
ret = Callbacks->CallWOWCallbackProc(fproc,arg);
TRACE(thunk,"... returns %ld\n",ret);
return ret;
}
/**********************************************************************
* WOWCallback16Ex (KERNEL32.55)(WOW32.3)
* Calls a function in 16bit code.
* RETURNS
* TRUE for success
*/
BOOL32 WINAPI WOWCallback16Ex(
FARPROC16 vpfn16, /* [in] win16 function to call */
DWORD dwFlags, /* [in] flags */
DWORD cbArgs, /* [in] nr of arguments */
LPVOID pArgs, /* [in] pointer to arguments (LPDWORD) */
LPDWORD pdwRetCode /* [out] return value of win16 function */
) {
return Callbacks->CallWOWCallback16Ex(vpfn16,dwFlags,cbArgs,pArgs,pdwRetCode);
}
/***********************************************************************
* _KERNEL32_52 (KERNEL32.52)
* Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
* [ok probably]
*/
LPVOID WINAPI _KERNEL32_52()
{
HMODULE32 hmod = LoadLibrary16("systhunk.dll");
TRACE(thunk, "systhunk.dll module %d\n", hmod);
if (hmod<=32)
return 0;
return PTR_SEG_TO_LIN(WIN32_GetProcAddress16(hmod,"ThkBuf"));
}
/***********************************************************************
* ThunkInitLS (KERNEL32.43)
* A thunkbuffer link routine
* The thunkbuf looks like:
*
* 00: DWORD length ? don't know exactly
* 04: SEGPTR ptr ? where does it point to?
* The pointer ptr is written into the first DWORD of 'thunk'.
* (probably correct implemented)
* [ok probably]
* RETURNS
* segmented pointer to thunk?
*/
DWORD WINAPI ThunkInitLS(
LPDWORD thunk, /* [in] win32 thunk */
LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
DWORD len, /* [in] thkbuffer length */
LPCSTR dll16, /* [in] name of win16 dll */
LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
) {
HINSTANCE16 hmod;
LPDWORD addr;
SEGPTR segaddr;
hmod = LoadLibrary16(dll16);
if (hmod<32) {
WARN(thunk,"failed to load 16bit DLL %s, error %d\n",
dll16,hmod);
return 0;
}
segaddr = (DWORD)WIN32_GetProcAddress16(hmod,(LPSTR)thkbuf);
if (!segaddr) {
WARN(thunk,"no %s exported from %s!\n",thkbuf,dll16);
return 0;
}
addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
if (addr[0] != len) {
WARN(thunk,"thkbuf length mismatch? %ld vs %ld\n",len,addr[0]);
return 0;
}
if (!addr[1])
return 0;
*(DWORD*)thunk = addr[1];
TRACE(thunk, "loaded module %d, func %s (%d) @ %p (%p), returning %p\n",
hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf, (int)thkbuf,
(void*)segaddr, addr, (void*)addr[1]);
return addr[1];
}
/***********************************************************************
* Common32ThkLS (KERNEL32.45)
*
* This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
* style thunks. The basic difference is that the parameter conversion
* is done completely on the *16-bit* side here. Thus we do not call
* the 16-bit target directly, but call a common entry point instead.
* This entry function then calls the target according to the target
* number passed in the DI register.
*
* Input: EAX SEGPTR to the common 16-bit entry point
* CX offset in thunk table (target number * 4)
* DX error return value if execution fails (unclear???)
* EDX.HI number of DWORD parameters
*
* (Note that we need to move the thunk table offset from CX to DI !)
*
* The called 16-bit stub expects its stack to look like this:
* ...
* (esp+40) 32-bit arguments
* ...
* (esp+8) 32 byte of stack space available as buffer
* (esp) 8 byte return address for use with 0x66 lret
*
* The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
* and uses the EAX register to return a DWORD return value.
* Thus we need to use a special assembly glue routine
* (CallRegisterLongProc instead of CallRegisterShortProc).
*
* Finally, we return to the caller, popping the arguments off
* the stack.
*
* FIXME: The called function uses EBX to return the number of
* arguments that are to be popped off the caller's stack.
* This is clobbered by the assembly glue, so we simply use
* the original EDX.HI to get the number of arguments.
* (Those two values should be equal anyway ...?)
*
*/
VOID WINAPI Common32ThkLS(CONTEXT *context)
{
CONTEXT context16;
DWORD argsize;
THDB *thdb = THREAD_Current();
memcpy(&context16,context,sizeof(context16));
DI_reg(&context16) = CX_reg(context);
CS_reg(&context16) = HIWORD(EAX_reg(context));
IP_reg(&context16) = LOWORD(EAX_reg(context));
EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
+ (WORD)&((STACK16FRAME*)0)->bp;
argsize = HIWORD(EDX_reg(context)) * 4;
memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
(LPBYTE)ESP_reg(context)+4, argsize );
EAX_reg(context) = Callbacks->CallRegisterLongProc(&context16, argsize + 32);
/* Clean up caller's stack frame */
EIP_reg(context) = POP_DWORD(context);
ESP_reg(context) += argsize;
PUSH_DWORD(context, EIP_reg(context));
}
/***********************************************************************
* _KERNEL32_40 (KERNEL32.40)
* YET Another 32->16 thunk, the difference to the others is still mysterious
* Target address is in EDX.
*
* [crashes]
*/
VOID WINAPI _KERNEL32_40(CONTEXT *context)
{
CONTEXT context16;
LPBYTE curstack;
DWORD ret,stacksize;
THDB *thdb = THREAD_Current();
__RESTORE_ES;
TRACE(thunk,"(EDX=0x%08lx)\n", EDX_reg(context) );
stacksize = EBP_reg(context)-ESP_reg(context);
TRACE(thunk," stacksize = %ld\n",stacksize);
TRACE(thunk,"on top of stack: 0x%04x\n",*(WORD*)ESP_reg(context));
memcpy(&context16,context,sizeof(context16));
CS_reg(&context16) = HIWORD(EDX_reg(context));
IP_reg(&context16) = LOWORD(EDX_reg(context));
curstack = PTR_SEG_TO_LIN(STACK16_PUSH( thdb, stacksize ));
memcpy(curstack-stacksize,(LPBYTE)ESP_reg(context),stacksize);
ret = Callbacks->CallRegisterShortProc(&context16,0);
STACK16_POP( thdb, stacksize );
TRACE(thunk,". returned %08lx\n",ret);
EAX_reg(context) = ret;
}
/***********************************************************************
* ThunkInitLSF (KERNEL32.41)
* A thunk setup routine.
* Expects a pointer to a preinitialized thunkbuffer in the first argument
* looking like:
* 00..03: unknown (pointer, check _41, _43, _46)
* 04: EB1E jmp +0x20
*
* 06..23: unknown (space for replacement code, check .90)
*
* 24:>E800000000 call offset 29
* 29:>58 pop eax ( target of call )
* 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
* 2F: BAxxxxxxxx mov edx,xxxxxxxx
* 34: 68yyyyyyyy push KERNEL32.90
* 39: C3 ret
*
* 3A: EB1E jmp +0x20
* 3E ... 59: unknown (space for replacement code?)
* 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
* 5F: 5A pop edx
* 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
* 66: 52 push edx
* 67: 68xxxxxxxx push xxxxxxxx
* 6C: 68yyyyyyyy push KERNEL32.89
* 71: C3 ret
* 72: end?
* This function checks if the code is there, and replaces the yyyyyyyy entries
* by the functionpointers.
* The thunkbuf looks like:
*
* 00: DWORD length ? don't know exactly
* 04: SEGPTR ptr ? where does it point to?
* The segpointer ptr is written into the first DWORD of 'thunk'.
* [ok probably]
* RETURNS
* unclear, pointer to win16 thkbuffer?
*/
LPVOID WINAPI ThunkInitLSF(
LPBYTE thunk, /* [in] win32 thunk */
LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
DWORD len, /* [in] length of thkbuffer */
LPCSTR dll16, /* [in] name of win16 dll */
LPCSTR dll32 /* [in] name of win32 dll */
) {
HMODULE32 hkrnl32 = GetModuleHandle32A("KERNEL32");
HMODULE16 hmod;
LPDWORD addr,addr2;
DWORD segaddr;
/* FIXME: add checks for valid code ... */
/* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
*(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)90);
*(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)89);
hmod = LoadLibrary16(dll16);
if (hmod<32) {
ERR(thunk,"failed to load 16bit DLL %s, error %d\n",
dll16,hmod);
return NULL;
}
segaddr = (DWORD)WIN32_GetProcAddress16(hmod,(LPSTR)thkbuf);
if (!segaddr) {
ERR(thunk,"no %s exported from %s!\n",thkbuf,dll16);
return NULL;
}
addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
if (addr[0] != len) {
ERR(thunk,"thkbuf length mismatch? %ld vs %ld\n",len,addr[0]);
return NULL;
}
addr2 = PTR_SEG_TO_LIN(addr[1]);
if (HIWORD(addr2))
*(DWORD*)thunk = (DWORD)addr2;
TRACE(thunk, "loaded module %d, func %s(%d) @ %p (%p), returning %p\n",
hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf, (int)thkbuf,
(void*)segaddr, addr, addr2);
return addr2;
}
/***********************************************************************
* FT_PrologPrime (KERNEL32.89)
*
* This function is called from the relay code installed by
* ThunkInitLSF. It replaces the location from where it was
* called by a standard FT_Prolog call stub (which is 'primed'
* by inserting the correct target table pointer).
* Finally, it calls that stub.
*
* Input: ECX target number + flags (passed through to FT_Prolog)
* (ESP) offset of location where target table pointer
* is stored, relative to the start of the relay code
* (ESP+4) pointer to start of relay code
* (this is where the FT_Prolog call stub gets written to)
*
* Note: The two DWORD arguments get popped from the stack.
*
*/
VOID WINAPI FT_PrologPrime(CONTEXT *context)
{
DWORD targetTableOffset = POP_DWORD(context);
LPBYTE relayCode = (LPBYTE)POP_DWORD(context);
DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
DWORD targetNr = LOBYTE(ECX_reg(context));
_write_ftprolog(relayCode, targetTable);
/* We should actually call the relay code now, */
/* but we skip it and go directly to FT_Prolog */
EDX_reg(context) = targetTable[targetNr];
FT_Prolog(context);
}
/***********************************************************************
* QT_ThunkPrime (KERNEL32.90)
*
* This function corresponds to FT_PrologPrime, but installs a
* call stub for QT_Thunk instead.
*
* Input: (EBP-4) target number (passed through to QT_Thunk)
* EDX target table pointer location offset
* EAX start of relay code
*
*/
VOID WINAPI QT_ThunkPrime(CONTEXT *context)
{
DWORD targetTableOffset = EDX_reg(context);
LPBYTE relayCode = (LPBYTE)EAX_reg(context);
DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
DWORD targetNr = *(DWORD *)(EBP_reg(context) - 4);
_write_qtthunk(relayCode, targetTable);
/* We should actually call the relay code now, */
/* but we skip it and go directly to QT_Thunk */
EDX_reg(context) = targetTable[targetNr];
QT_Thunk(context);
}
/***********************************************************************
* (KERNEL32.46)
* Another thunkbuf link routine.
* The start of the thunkbuf looks like this:
* 00: DWORD length
* 04: SEGPTR address for thunkbuffer pointer
* [ok probably]
*/
VOID WINAPI ThunkInitSL(
LPBYTE thunk, /* [in] start of thunkbuffer */
LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
DWORD len, /* [in] length of thunkbuffer */
LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
) {
LPDWORD addr;
HMODULE16 hmod;
SEGPTR segaddr;
hmod = LoadLibrary16(dll16);
if (hmod < 32) {
ERR(thunk,"couldn't load %s, error %d\n",dll16,hmod);
return;
}
segaddr = (SEGPTR)WIN32_GetProcAddress16(hmod,thkbuf);
if (!segaddr) {
ERR(thunk,"haven't found %s in %s!\n",thkbuf,dll16);
return;
}
addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
if (addr[0] != len) {
ERR(thunk,"length of thkbuf differs from expected length! "
"(%ld vs %ld)\n",addr[0],len);
return;
}
*(DWORD*)PTR_SEG_TO_LIN(addr[1]) = (DWORD)thunk;
TRACE(thunk, "loaded module %d, func %s(%d) @ %p (%p)\n",
hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf,
(int)thkbuf, (void*)segaddr, addr);
}
/**********************************************************************
* SSOnBigStack KERNEL32.87
* Check if thunking is initialized (ss selector set up etc.)
* We do that differently, so just return TRUE.
* [ok]
* RETURNS
* TRUE for success.
*/
BOOL32 WINAPI SSOnBigStack()
{
TRACE(thunk, "Yes, thunking is initialized\n");
return TRUE;
}
/**********************************************************************
* SSCall
* One of the real thunking functions. This one seems to be for 32<->32
* thunks. It should probably be capable of crossing processboundaries.
*
* And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
* [ok]
*/
DWORD WINAPIV SSCall(
DWORD nr, /* [in] number of argument bytes */
DWORD flags, /* [in] FIXME: flags ? */
FARPROC32 fun, /* [in] function to call */
... /* [in/out] arguments */
) {
DWORD i,ret;
DWORD *args = ((DWORD *)&fun) + 1;
if(TRACE_ON(thunk)){
dbg_decl_str(thunk, 256);
for (i=0;i<nr/4;i++)
dsprintf(thunk,"0x%08lx,",args[i]);
TRACE(thunk,"(%ld,0x%08lx,%p,[%s])\n",
nr,flags,fun,dbg_str(thunk));
}
switch (nr) {
case 0: ret = fun();
break;
case 4: ret = fun(args[0]);
break;
case 8: ret = fun(args[0],args[1]);
break;
case 12: ret = fun(args[0],args[1],args[2]);
break;
case 16: ret = fun(args[0],args[1],args[2],args[3]);
break;
case 20: ret = fun(args[0],args[1],args[2],args[3],args[4]);
break;
case 24: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
break;
case 28: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
break;
case 32: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
break;
case 36: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
break;
case 40: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
break;
case 44: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
break;
case 48: ret = fun(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;
default:
fprintf(stderr,"_KERNEL32_88: unsupported nr of arguments, %ld\n",nr);
ret = 0;
break;
}
TRACE(thunk," returning %ld ...\n",ret);
return ret;
}
/**********************************************************************
* KERNEL_619 (KERNEL)
* Seems to store y and z depending on x in some internal lists...
*/
WORD WINAPI _KERNEL_619(WORD x,DWORD y,DWORD z)
{
fprintf(stderr,"KERNEL_619(0x%04x,0x%08lx,0x%08lx)\n",x,y,z);
return x;
}
/**********************************************************************
* AllocSLCallback (KERNEL32)
*
* Win95 uses some structchains for callbacks. It allocates them
* in blocks of 100 entries, size 32 bytes each, layout:
* blockstart:
* 0: PTR nextblockstart
* 4: entry *first;
* 8: WORD sel ( start points to blockstart)
* A: WORD unknown
* 100xentry:
* 00..17: Code
* 18: PDB *owning_process;
* 1C: PTR blockstart
*
* We ignore this for now. (Just a note for further developers)
* FIXME: use this method, so we don't waste selectors...
*
* Following code is then generated by AllocSLCallback. The code is 16 bit, so
* the 0x66 prefix switches from word->long registers.
*
* 665A pop edx
* 6668x arg2 x pushl <arg2>
* 6652 push edx
* EAx arg1 x jmpf <arg1>
*
* returns the startaddress of this thunk.
*
* Note, that they look very similair to the ones allocates by THUNK_Alloc.
* RETURNS
* segmented pointer to the start of the thunk
*/
DWORD WINAPI
AllocSLCallback(
DWORD finalizer, /* [in] finalizer function */
DWORD callback /* [in] callback function */
) {
LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
WORD sel;
x=thunk;
*x++=0x66;*x++=0x5a; /* popl edx */
*x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
*x++=0x66;*x++=0x52; /* pushl edx */
*x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
*(PDB32**)(thunk+18) = PROCESS_Current();
sel = SELECTOR_AllocBlock( thunk , 32, SEGMENT_CODE, FALSE, FALSE );
return (sel<<16)|0;
}
/**********************************************************************
* FreeSLCallback (KERNEL32.274)
* Frees the specified 16->32 callback
*/
void WINAPI
FreeSLCallback(
DWORD x /* [in] 16 bit callback (segmented pointer?) */
) {
fprintf(stderr,"FreeSLCallback(0x%08lx)\n",x);
}
/**********************************************************************
* KERNEL_471 (KERNEL.471)
* RETURNS
* Seems to return the uncrypted current process pointer. [Not 100% sure].
*/
LPVOID WINAPI
_KERNEL_471() {
return PROCESS_Current();
}
/**********************************************************************
* KERNEL_472 (KERNEL.472)
* something like GetCurrenthInstance.
* RETURNS
* the hInstance
*/
VOID WINAPI
_KERNEL_472(CONTEXT *context) {
fprintf(stderr,"_KERNEL_472(0x%08lx),stub\n",EAX_reg(context));
if (!EAX_reg(context)) {
TDB *pTask = (TDB*)GlobalLock16(GetCurrentTask());
AX_reg(context)=pTask->hInstance;
return;
}
if (!HIWORD(EAX_reg(context)))
return; /* returns the passed value */
/* hmm ... fixme */
}
/**********************************************************************
* KERNEL_431 (KERNEL.431)
* IsPeFormat (W32SYS.2)
* Checks the passed filename if it is a PE format executeable
* RETURNS
* TRUE, if it is.
* FALSE if not.
*/
BOOL16 WINAPI IsPeFormat(
LPSTR fn, /* [in] filename to executeable */
HFILE16 hf16 /* [in] open file, if filename is NULL */
) {
IMAGE_DOS_HEADER mzh;
HFILE32 hf=hf16;
OFSTRUCT ofs;
DWORD xmagic;
if (fn) {
hf = OpenFile32(fn,&ofs,OF_READ);
if (hf==HFILE_ERROR32)
return FALSE;
}
_llseek32(hf,0,SEEK_SET);
if (sizeof(mzh)!=_lread32(hf,&mzh,sizeof(mzh))) {
_lclose32(hf);
return FALSE;
}
if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) {
fprintf(stderr,"file has not got dos signature!\n");
_lclose32(hf);
return FALSE;
}
_llseek32(hf,mzh.e_lfanew,SEEK_SET);
if (sizeof(DWORD)!=_lread32(hf,&xmagic,sizeof(DWORD))) {
_lclose32(hf);
return FALSE;
}
_lclose32(hf);
return (xmagic == IMAGE_NT_SIGNATURE);
}
/***********************************************************************
* WOWHandle32 (KERNEL32.57)(WOW32.16)
* Converts a win16 handle of type into the respective win32 handle.
* We currently just return this handle, since most handles are the same
* for win16 and win32.
* RETURNS
* The new handle
*/
HANDLE32 WINAPI WOWHandle32(
WORD handle, /* [in] win16 handle */
WOW_HANDLE_TYPE type /* [in] handle type */
) {
fprintf(stderr,"WOWHandle32(0x%04x,%d)\n",handle,type);
return (HANDLE32)handle;
}
/***********************************************************************
* FUNC004 (KERNEL.631)
* A 16->32 thunk setup function.
* Gets called from a thunkbuffer (value of EAX). It overwrites the start
* with a jmp to a kernel32 function. The kernel32 function gets passed EDX.
* (and possibly CX).
*/
void WINAPI FUNC004(
CONTEXT *context /* [in/out] register context from 1632-relay */
) {
FIXME(reg,",STUB (edx is 0x%08lx, eax is 0x%08lx,edx[0x10] is 0x%08lx)!\n",
EDX_reg(context),
EAX_reg(context),
((DWORD*)PTR_SEG_TO_LIN(EDX_reg(context)))[0x10/4]
);
#if 0
{
LPBYTE x,target = (LPBYTE)PTR_SEG_TO_LIN(EAX_reg(context));
WORD ds,cs;
GET_DS(ds);
GET_CS(cs);
/* Won't work anyway since we don't know the function called in KERNEL32 -Marcus*/
x = target;
*x++= 0xb8; *(WORD*)x= ds;x+=2; /* mov ax,KERNEL32_DS */
*x++= 0x8e; *x++ = 0xc0; /* mov es,ax */
*x++= 0x66; *x++ = 0xba; *(DWORD*)x=EDX_reg(context);x+=4;
/* mov edx, $EDX */
*x++= 0x66; *x++ = 0xea; /* jmp KERNEL32_CS:kernel32fun */
*(DWORD*)x=0;x+=4;/* FIXME: _what_ function does it call? */
*(WORD*)x=cs;x+=2;
IP_reg(context) = LOWORD(EAX_reg(context));
CS_reg(context) = HIWORD(EAX_reg(context));
}
#endif
return;
}