mirror of
https://github.com/UzixLS/KernelEx.git
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74 lines
1.9 KiB
C
Executable File
74 lines
1.9 KiB
C
Executable File
/*
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* KernelEx
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*
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* Copyright (C) 2008, Tihiy
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* This file is part of KernelEx source code.
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*
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* KernelEx is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; version 2 of the License.
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*
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* KernelEx is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <windows.h>
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static BOOL IsValidHeap(HANDLE hHeap)
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{
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WORD *sig;
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if ( IsBadReadPtr(hHeap,0x74) ) return FALSE;
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sig = (WORD*)((DWORD)hHeap+0x72);
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if ( *sig != 0x4948 ) return FALSE;
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return TRUE;
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}
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/* MAKE_EXPORT HeapLock_new=HeapLock */
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BOOL WINAPI HeapLock_new(
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HANDLE hHeap
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)
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{
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if ( !IsValidHeap(hHeap) ) return FALSE;
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EnterCriticalSection((CRITICAL_SECTION*)((DWORD)hHeap+0x50));
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return TRUE;
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}
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/* MAKE_EXPORT HeapUnlock_new=HeapUnlock */
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BOOL WINAPI HeapUnlock_new(
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HANDLE hHeap
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)
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{
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if ( !IsValidHeap(hHeap) ) return FALSE;
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LeaveCriticalSection((CRITICAL_SECTION*)((DWORD)hHeap+0x50));
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return TRUE;
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}
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#define ISPOINTER(h) (((ULONG_PTR)(h)&2)==0)
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/* MAKE_EXPORT GlobalLock_fix=GlobalLock */
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LPVOID WINAPI GlobalLock_fix(
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HGLOBAL hMem // address of the global memory object
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)
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{
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if (ISPOINTER(hMem))
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return IsBadReadPtr(hMem, 1) ? NULL : hMem;
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return GlobalLock(hMem);
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}
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/* MAKE_EXPORT GlobalUnlock_fix=GlobalUnlock */
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BOOL WINAPI GlobalUnlock_fix(
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HGLOBAL hMem // handle to the global memory object
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)
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{
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if (ISPOINTER(hMem))
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return TRUE;
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return GlobalUnlock(hMem);
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}
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