664 lines
20 KiB
C
664 lines
20 KiB
C
/*
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* KERNEL32 thunks and other undocumented stuff
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*
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* Copyright 1997 Marcus Meissner
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*/
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#include <stdio.h>
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#include "windows.h"
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#include "callback.h"
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#include "resource.h"
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#include "task.h"
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#include "user.h"
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#include "heap.h"
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#include "module.h"
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#include "process.h"
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#include "stackframe.h"
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#include "selectors.h"
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#include "task.h"
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#include "win.h"
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#include "stddebug.h"
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#include "debug.h"
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/***********************************************************************
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* *
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* Win95 internal thunks *
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* *
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***********************************************************************/
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/***********************************************************************
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* Generates a FT_Prolog call.
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*
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* 0FB6D1 movzbl edx,cl
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* 8B1495xxxxxxxx mov edx,[4*edx + xxxxxxxx]
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* 68xxxxxxxx push FT_Prolog
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* C3 lret
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*/
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static void _write_ftprolog(LPBYTE thunk,DWORD thunkstart) {
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LPBYTE x;
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x = thunk;
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*x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
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*x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD*)x= thunkstart;
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x+=4; /* mov edx, [4*edx + thunkstart] */
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*x++ = 0x68; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"FT_Prolog");
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x+=4; /* push FT_Prolog */
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*x++ = 0xC3; /* lret */
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/* fill rest with 0xCC / int 3 */
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}
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/***********************************************************************
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* FT_PrologPrime (KERNEL32.89)
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*/
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void WINAPI FT_PrologPrime(DWORD startind,LPBYTE thunk) {
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_write_ftprolog(thunk,*(DWORD*)(startind+thunk));
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}
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/***********************************************************************
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* Generates a QT_Thunk style call.
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*
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* 33C9 xor ecx, ecx
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* 8A4DFC mov cl , [ebp-04]
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* 8B148Dxxxxxxxx mov edx, [4*ecx + (EAX+EDX)]
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* B8yyyyyyyy mov eax, QT_Thunk
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* FFE0 jmp eax
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*/
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static void _write_qtthunk(LPBYTE start,DWORD thunkstart) {
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LPBYTE x;
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x = start;
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*x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
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*x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
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*x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD*)x= thunkstart;
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x+=4; /* mov edx, [4*ecx + (EAX+EDX) */
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*x++ = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"QT_Thunk");
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x+=4; /* mov eax , QT_Thunk */
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*x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
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/* should fill the rest of the 32 bytes with 0xCC */
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}
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/***********************************************************************
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* ThunkConnect32 (KERNEL32)
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* Connects a 32bit and a 16bit thunkbuffer.
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*/
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struct thunkstruct
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{
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char magic[4];
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DWORD length;
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DWORD ptr;
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DWORD x0C;
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DWORD x10;
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DWORD x14;
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DWORD x18;
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DWORD x1C;
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DWORD x20;
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};
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UINT32 WINAPI ThunkConnect32( struct thunkstruct *ths, LPSTR thunkfun16,
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LPSTR module16, LPSTR module32, HMODULE32 hmod32,
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DWORD dllinitarg1 )
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{
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HINSTANCE16 hmm;
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SEGPTR thkbuf;
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struct thunkstruct *ths16;
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dprintf_thunk(stddeb,"ThunkConnect32(<struct>,%s,%s,%s,%x,%lx)\n",
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thunkfun16,module32,module16,hmod32,dllinitarg1
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);
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dprintf_thunk(stddeb," magic = %c%c%c%c\n",
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ths->magic[0],
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ths->magic[1],
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ths->magic[2],
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ths->magic[3]
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);
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dprintf_thunk(stddeb," length = %lx\n",ths->length);
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if (lstrncmp32A(ths->magic,"SL01",4)&&lstrncmp32A(ths->magic,"LS01",4))
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return 0;
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hmm=LoadModule16(module16,NULL);
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if (hmm<=32)
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return 0;
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thkbuf=(SEGPTR)WIN32_GetProcAddress16(hmm,thunkfun16);
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if (!thkbuf)
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return 0;
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ths16=(struct thunkstruct*)PTR_SEG_TO_LIN(thkbuf);
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if (lstrncmp32A(ths16->magic,ths->magic,4))
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return 0;
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if (!lstrncmp32A(ths->magic,"SL01",4)) {
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if (ths16->length != ths->length)
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return 0;
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ths->x0C = (DWORD)ths16;
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dprintf_thunk(stddeb," ths16 magic is 0x%08lx\n",*(DWORD*)ths16->magic);
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if (*((DWORD*)ths16->magic) != 0x0000304C)
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return 0;
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if (!*(WORD*)(((LPBYTE)ths16)+0x12))
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return 0;
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}
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if (!lstrncmp32A(ths->magic,"LS01",4)) {
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if (ths16->length != ths->length)
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return 0;
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ths->ptr = (DWORD)PTR_SEG_TO_LIN(ths16->ptr);
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/* code offset for QT_Thunk is at 0x1C... */
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_write_qtthunk (((LPBYTE)ths) + ths->x1C,ths->ptr);
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/* code offset for FT_Prolog is at 0x20... */
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_write_ftprolog(((LPBYTE)ths) + ths->x20,ths->ptr);
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return 1;
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}
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return TRUE;
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}
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/**********************************************************************
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* QT_Thunk (KERNEL32)
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*
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* The target address is in EDX.
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* The 16 bit arguments start at ESP+4.
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* The number of 16bit argumentbytes is EBP-ESP-0x44 (68 Byte thunksetup).
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* [ok]
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*/
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VOID WINAPI QT_Thunk(CONTEXT *context)
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{
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CONTEXT context16;
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DWORD argsize;
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memcpy(&context16,context,sizeof(context16));
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CS_reg(&context16) = HIWORD(EDX_reg(context));
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IP_reg(&context16) = LOWORD(EDX_reg(context));
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EBP_reg(&context16) = OFFSETOF(IF1632_Saved16_ss_sp)
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+ (WORD)&((STACK16FRAME*)0)->bp;
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argsize = EBP_reg(context)-ESP_reg(context)-0x44;
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memcpy( ((LPBYTE)CURRENT_STACK16)-argsize,
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(LPBYTE)ESP_reg(context)+4, argsize );
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EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
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}
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/**********************************************************************
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* WOWCallback16 (KERNEL32.62)
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*/
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DWORD WINAPI WOWCallback16(FARPROC16 fproc,DWORD arg)
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{
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DWORD ret;
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dprintf_thunk(stddeb,"WOWCallback16(%p,0x%08lx) ",fproc,arg);
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ret = Callbacks->CallWOWCallbackProc(fproc,arg);
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dprintf_thunk(stddeb,"... returns %ld\n",ret);
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return ret;
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}
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/***********************************************************************
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* _KERNEL32_52 (KERNEL32.52)
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* Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
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* [ok probably]
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*/
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LPVOID WINAPI _KERNEL32_52()
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{
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HMODULE32 hmod = LoadLibrary16("systhunk.dll");
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dprintf_thunk(stddeb, "_KERNEL32_52: systhunk.dll module %d\n", hmod);
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if (hmod<=32)
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return 0;
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return PTR_SEG_TO_LIN(WIN32_GetProcAddress16(hmod,"ThkBuf"));
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}
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/***********************************************************************
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* _KERNEL32_43 (KERNEL32.42)
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* A thunkbuffer link routine
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* The thunkbuf looks like:
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*
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* 00: DWORD length ? don't know exactly
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* 04: SEGPTR ptr ? where does it point to?
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* The pointer ptr is written into the first DWORD of 'thunk'.
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* (probably correct implemented)
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* [ok probably]
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*/
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DWORD WINAPI _KERNEL32_43(LPDWORD thunk,LPCSTR thkbuf,DWORD len,
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LPCSTR dll16,LPCSTR dll32)
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{
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HINSTANCE16 hmod;
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LPDWORD addr;
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SEGPTR segaddr;
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hmod = LoadLibrary16(dll16);
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if (hmod<32) {
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fprintf(stderr,"KERNEL32_43->failed to load 16bit DLL %s, error %d\n",dll16,hmod);
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return 0;
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}
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segaddr = (DWORD)WIN32_GetProcAddress16(hmod,(LPSTR)thkbuf);
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if (!segaddr) {
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fprintf(stderr,"KERNEL32_43->no %s exported from %s!\n",thkbuf,dll16);
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return 0;
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}
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addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
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if (addr[0] != len) {
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fprintf(stderr,"KERNEL32_43->thkbuf length mismatch? %ld vs %ld\n",len,addr[0]);
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return 0;
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}
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if (!addr[1])
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return 0;
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*(DWORD*)thunk = addr[1];
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dprintf_thunk(stddeb, "_KERNEL32_43: loaded module %d, func %s (%d) @ %p (%p), returning %p\n",
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hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf, (int)thkbuf, (void*)segaddr, addr, (void*)addr[1]);
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return addr[1];
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}
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/***********************************************************************
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* _KERNEL32_45 (KERNEL32.44)
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* Another 32->16 thunk, the difference to QT_Thunk is, that the called routine
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* uses 0x66 lret, and that we have to pass CX in DI.
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* (there seems to be some kind of BL/BX return magic too...)
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*
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* [doesn't crash anymore]
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*/
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VOID WINAPI _KERNEL32_45(CONTEXT *context)
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{
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CONTEXT context16;
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LPBYTE curstack;
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DWORD ret,stacksize;
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dprintf_thunk(stddeb,"KERNEL32_45(%%eax=0x%08lx(%%cx=0x%04lx,%%edx=0x%08lx))\n",
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(DWORD)EAX_reg(context),(DWORD)CX_reg(context),(DWORD)EDX_reg(context)
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);
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stacksize = EBP_reg(context)-ESP_reg(context);
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dprintf_thunk(stddeb," stacksize = %ld\n",stacksize);
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memcpy(&context16,context,sizeof(context16));
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DI_reg(&context16) = CX_reg(context);
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CS_reg(&context16) = HIWORD(EAX_reg(context));
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IP_reg(&context16) = LOWORD(EAX_reg(context));
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curstack = PTR_SEG_TO_LIN(STACK16_PUSH(stacksize));
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memcpy(curstack-stacksize,(LPBYTE)ESP_reg(context),stacksize);
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ret = Callbacks->CallRegisterLongProc(&context16,0);
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STACK16_POP(stacksize);
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dprintf_thunk(stddeb,". returned %08lx\n",ret);
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EAX_reg(context) = ret;
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}
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/***********************************************************************
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* _KERNEL32_40 (KERNEL32.40)
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* YET Another 32->16 thunk, the difference to the others is still mysterious
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* target address is EDX
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*
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* [crashes]
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*/
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VOID WINAPI _KERNEL32_40(CONTEXT *context)
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{
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CONTEXT context16;
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LPBYTE curstack;
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DWORD ret,stacksize;
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dprintf_thunk(stddeb,"_KERNEL32_40(EDX=0x%08lx)\n",
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EDX_reg(context)
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);
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stacksize = EBP_reg(context)-ESP_reg(context);
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dprintf_thunk(stddeb," stacksize = %ld\n",stacksize);
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dprintf_thunk(stddeb,"on top of stack: 0x%04x\n",*(WORD*)ESP_reg(context));
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memcpy(&context16,context,sizeof(context16));
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CS_reg(&context16) = HIWORD(EDX_reg(context));
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IP_reg(&context16) = LOWORD(EDX_reg(context));
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curstack = PTR_SEG_TO_LIN(STACK16_PUSH(stacksize));
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memcpy(curstack-stacksize,(LPBYTE)ESP_reg(context),stacksize);
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ret = Callbacks->CallRegisterShortProc(&context16,0);
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STACK16_POP(stacksize);
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dprintf_thunk(stddeb,". returned %08lx\n",ret);
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EAX_reg(context) = ret;
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}
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/***********************************************************************
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* (KERNEL32.41)
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* A thunk setup routine.
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* Expects a pointer to a preinitialized thunkbuffer in the first argument
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* looking like:
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* 00..03: unknown (pointer, check _41, _43, _46)
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* 04: EB1E jmp +0x20
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*
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* 06..23: unknown (space for replacement code, check .90)
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*
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* 24:>E800000000 call offset 29
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* 29:>58 pop eax ( target of call )
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* 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
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* 2F: BAxxxxxxxx mov edx,xxxxxxxx
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* 34: 68yyyyyyyy push KERNEL32.90
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* 39: C3 ret
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*
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* 3A: EB1E jmp +0x20
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* 3E ... 59: unknown (space for replacement code?)
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* 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
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* 5F: 5A pop edx
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* 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
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* 66: 52 push edx
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* 67: 68xxxxxxxx push xxxxxxxx
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* 6C: 68yyyyyyyy push KERNEL32.89
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* 71: C3 ret
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* 72: end?
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* This function checks if the code is there, and replaces the yyyyyyyy entries
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* by the functionpointers.
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* The thunkbuf looks like:
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*
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* 00: DWORD length ? don't know exactly
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* 04: SEGPTR ptr ? where does it point to?
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* The segpointer ptr is written into the first DWORD of 'thunk'.
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* [ok probably]
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*/
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LPVOID WINAPI _KERNEL32_41(LPBYTE thunk,LPCSTR thkbuf,DWORD len,LPCSTR dll16,
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LPCSTR dll32)
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{
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HMODULE32 hkrnl32 = GetModuleHandle32A("KERNEL32");
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HMODULE16 hmod;
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LPDWORD addr,addr2;
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DWORD segaddr;
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/* FIXME: add checks for valid code ... */
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/* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
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*(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)90);
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*(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)89);
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hmod = LoadLibrary16(dll16);
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if (hmod<32) {
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fprintf(stderr,"KERNEL32_41->failed to load 16bit DLL %s, error %d\n",dll16,hmod);
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return NULL;
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}
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segaddr = (DWORD)WIN32_GetProcAddress16(hmod,(LPSTR)thkbuf);
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if (!segaddr) {
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fprintf(stderr,"KERNEL32_41->no %s exported from %s!\n",thkbuf,dll16);
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return NULL;
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}
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addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
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if (addr[0] != len) {
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fprintf(stderr,"KERNEL32_41->thkbuf length mismatch? %ld vs %ld\n",len,addr[0]);
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return NULL;
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}
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addr2 = PTR_SEG_TO_LIN(addr[1]);
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if (HIWORD(addr2))
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*(DWORD*)thunk = (DWORD)addr2;
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dprintf_thunk(stddeb, "_KERNEL32_41: loaded module %d, func %s(%d) @ %p (%p), returning %p\n",
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hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf, (int)thkbuf, (void*)segaddr, addr, addr2);
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return addr2;
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}
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/***********************************************************************
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* (KERNEL32.90)
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* QT Thunk priming function
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* Rewrites the first part of the thunk to use the QT_Thunk interface
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* and jumps to the start of that code.
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* [ok]
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*/
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VOID WINAPI _KERNEL32_90(CONTEXT *context)
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{
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dprintf_thunk(stddeb, "_KERNEL32_90: QT Thunk priming; context %p\n", context);
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_write_qtthunk((LPBYTE)EAX_reg(context),*(DWORD*)(EAX_reg(context)+EDX_reg(context)));
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/* we just call the real QT_Thunk right now
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* we can bypass the relaycode, for we already have the registercontext
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*/
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EDX_reg(context) = *(DWORD*)((*(DWORD*)(EAX_reg(context)+EDX_reg(context)))+4*(((BYTE*)EBP_reg(context))[-4]));
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return QT_Thunk(context);
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}
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|
|
|
/***********************************************************************
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* (KERNEL32.45)
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* Another thunkbuf link routine.
|
|
* The start of the thunkbuf looks like this:
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* 00: DWORD length
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* 04: SEGPTR address for thunkbuffer pointer
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* [ok probably]
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*/
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VOID WINAPI _KERNEL32_46(LPBYTE thunk,LPSTR thkbuf,DWORD len,LPSTR dll16,
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LPSTR dll32)
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{
|
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LPDWORD addr;
|
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HMODULE16 hmod;
|
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SEGPTR segaddr;
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|
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hmod = LoadLibrary16(dll16);
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if (hmod < 32) {
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fprintf(stderr,"KERNEL32_46->couldn't load %s, error %d\n",dll16,hmod);
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return;
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}
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segaddr = (SEGPTR)WIN32_GetProcAddress16(hmod,thkbuf);
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if (!segaddr) {
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fprintf(stderr,"KERNEL32_46-> haven't found %s in %s!\n",thkbuf,dll16);
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return;
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}
|
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addr = (LPDWORD)PTR_SEG_TO_LIN(segaddr);
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if (addr[0] != len) {
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fprintf(stderr,"KERNEL32_46-> length of thkbuf differs from expected length! (%ld vs %ld)\n",addr[0],len);
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return;
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}
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*(DWORD*)PTR_SEG_TO_LIN(addr[1]) = (DWORD)thunk;
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|
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dprintf_thunk(stddeb, "_KERNEL32_46: loaded module %d, func %s(%d) @ %p (%p)\n",
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hmod, HIWORD(thkbuf)==0 ? "<ordinal>" : thkbuf, (int)thkbuf, (void*)segaddr, addr);
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}
|
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|
|
/**********************************************************************
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* _KERNEL32_87
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* Check if thunking is initialized (ss selector set up etc.)
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* We do that differently, so just return TRUE.
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* [ok]
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*/
|
|
BOOL32 WINAPI _KERNEL32_87()
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{
|
|
dprintf_thunk(stddeb, "_KERNEL32_87: Yes, thunking is initialized\n");
|
|
return TRUE;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* _KERNEL32_88
|
|
* 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 _KERNEL32_88( DWORD nr, DWORD flags, FARPROC32 fun, ... )
|
|
{
|
|
DWORD i,ret;
|
|
DWORD *args = ((DWORD *)&fun) + 1;
|
|
|
|
dprintf_thunk(stddeb,"KERNEL32_88(%ld,0x%08lx,%p,[ ",nr,flags,fun);
|
|
for (i=0;i<nr/4;i++) { dprintf_thunk(stddeb,"0x%08lx,",args[i]); }
|
|
dprintf_thunk(stddeb,"])\n");
|
|
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;
|
|
|
|
}
|
|
dprintf_thunk(stddeb," 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.
|
|
*/
|
|
DWORD WINAPI
|
|
AllocSLCallback(DWORD finalizer,DWORD callback) {
|
|
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;
|
|
}
|
|
|
|
void WINAPI
|
|
FreeSLCallback(DWORD x) {
|
|
fprintf(stderr,"FreeSLCallback(0x%08lx)\n",x);
|
|
}
|
|
|
|
/**********************************************************************
|
|
* KERNEL_358 (KERNEL)
|
|
* Allocates a code segment which starts at the address passed in x. limit
|
|
* 0xfffff, and returns the pointer to the start.
|
|
*/
|
|
DWORD WINAPI
|
|
_KERNEL_358(DWORD x) {
|
|
WORD sel;
|
|
|
|
fprintf(stderr,"_KERNEL_358(0x%08lx),stub\n",x);
|
|
if (!HIWORD(x))
|
|
return x;
|
|
|
|
sel = SELECTOR_AllocBlock( PTR_SEG_TO_LIN(x) , 0xffff, SEGMENT_CODE, FALSE, FALSE );
|
|
return (sel<<16)|(0x0000);
|
|
}
|
|
|
|
/**********************************************************************
|
|
* KERNEL_359 (KERNEL)
|
|
* Frees the code segment of the passed linear pointer (This has usually
|
|
* been allocated by _KERNEL_358).
|
|
*/
|
|
VOID WINAPI
|
|
_KERNEL_359(DWORD x) {
|
|
DWORD savedsssp;
|
|
|
|
fprintf(stderr,"_KERNEL_359(0x%08lx),stub\n",x);
|
|
if ((HIWORD(x) & 7)!=7)
|
|
return;
|
|
savedsssp = IF1632_Saved16_ss_sp;IF1632_Saved16_ss_sp = 0;
|
|
SELECTOR_FreeBlock(x>>16,1);
|
|
IF1632_Saved16_ss_sp = savedsssp;
|
|
return;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* KERNEL_472 (KERNEL)
|
|
* something like GetCurrenthInstance.
|
|
*/
|
|
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)
|
|
* IsPeFile
|
|
*/
|
|
BOOL16 WINAPI KERNEL_431(LPSTR fn,WORD x) {
|
|
IMAGE_DOS_HEADER mzh;
|
|
HFILE32 hf;
|
|
OFSTRUCT ofs;
|
|
DWORD xmagic;
|
|
|
|
hf = OpenFile32(fn,&ofs,OF_READ);
|
|
if (hf==HFILE_ERROR32)
|
|
return FALSE;
|
|
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);
|
|
}
|