diff -r 000000000000 -r c24a6fa957db core/MemoryUtils.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/MemoryUtils.cpp	Sun Jul 06 04:49:55 2008 +0000
@@ -0,0 +1,220 @@
+/**
+ * vim: set ts=4 :
+ * =============================================================================
+ * SourceMod
+ * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.
+ * =============================================================================
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, version 3.0, as published by the
+ * Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As a special exception, AlliedModders LLC gives you permission to link the
+ * code of this program (as well as its derivative works) to "Half-Life 2," the
+ * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
+ * by the Valve Corporation.  You must obey the GNU General Public License in
+ * all respects for all other code used.  Additionally, AlliedModders LLC grants
+ * this exception to all derivative works.  AlliedModders LLC defines further
+ * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
+ * or <http://www.sourcemod.net/license.php>.
+ *
+ * Version: $Id$
+ */
+
+#include "MemoryUtils.h"
+#include "ShareSys.h"
+#ifdef PLATFORM_LINUX
+#include <string.h>
+#include <elf.h>
+#endif
+
+MemoryUtils g_MemUtils;
+
+#if 0
+MemoryUtils::MemoryUtils()
+{
+#ifdef PLATFORM_WINDOWS
+
+	SYSTEM_INFO info;
+	GetSystemInfo(&info);
+
+	m_PageSize = info.dwPageSize;
+
+#elif defined PLATFORM_POSIX
+
+	m_PageSize = sysconf(_SC_PAGE_SIZE);
+
+#endif
+}
+#endif
+
+void MemoryUtils::OnSourceModAllInitialized()
+{
+	g_ShareSys.AddInterface(NULL, this);
+}
+
+void *MemoryUtils::FindPattern(const void *libPtr, const char *pattern, size_t len)
+{
+	DynLibInfo lib;
+	bool found;
+	char *ptr, *end;
+
+	memset(&lib, 0, sizeof(DynLibInfo));
+
+	if (!GetLibraryInfo(libPtr, lib))
+	{
+		return NULL;
+	}
+
+	ptr = reinterpret_cast<char *>(lib.baseAddress);
+	end = ptr + lib.memorySize;
+
+	while (ptr < end)
+	{
+		found = true;
+		for (register size_t i = 0; i < len; i++)
+		{
+			if (pattern[i] != '\x2A' && pattern[i] != ptr[i])
+			{
+				found = false;
+				break;
+			}
+		}
+
+		if (found)
+			return ptr;
+
+		ptr++;
+	}
+
+	return NULL;
+}
+
+bool MemoryUtils::GetLibraryInfo(const void *libPtr, DynLibInfo &lib)
+{
+	unsigned long baseAddr;
+
+	if (libPtr == NULL)
+	{
+		return false;
+	}
+
+#ifdef PLATFORM_WINDOWS
+
+	MEMORY_BASIC_INFORMATION info;
+	IMAGE_DOS_HEADER *dos;
+	IMAGE_NT_HEADERS *pe;
+	IMAGE_FILE_HEADER *file;
+	IMAGE_OPTIONAL_HEADER *opt;
+
+	if (!VirtualQuery(libPtr, &info, sizeof(MEMORY_BASIC_INFORMATION)))
+	{
+		return false;
+	}
+
+	baseAddr = reinterpret_cast<unsigned long>(info.AllocationBase);
+
+	/* All this is for our insane sanity checks :o */
+	dos = reinterpret_cast<IMAGE_DOS_HEADER *>(baseAddr);
+	pe = reinterpret_cast<IMAGE_NT_HEADERS *>(baseAddr + dos->e_lfanew);
+	file = &pe->FileHeader;
+	opt = &pe->OptionalHeader;
+
+	/* Check PE magic and signature */
+	if (dos->e_magic != IMAGE_DOS_SIGNATURE || pe->Signature != IMAGE_NT_SIGNATURE || opt->Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC)
+	{
+		return false;
+	}
+
+	/* Check architecture, which is 32-bit/x86 right now
+	 * Should change this for 64-bit if Valve gets their act together
+	 */
+	if (file->Machine != IMAGE_FILE_MACHINE_I386)
+	{
+		return false;
+	}
+
+	/* For our purposes, this must be a dynamic library */
+	if ((file->Characteristics & IMAGE_FILE_DLL) == 0)
+	{
+		return false;
+	}
+
+	/* Finally, we can do this */
+	lib.memorySize = opt->SizeOfImage;
+
+#elif defined PLATFORM_LINUX
+
+	Dl_info info;
+	Elf32_Ehdr *file;
+	Elf32_Phdr *phdr;
+	uint16_t phdrCount;
+
+	if (!dladdr(libPtr, &info))
+	{
+		return false;
+	}
+
+	if (!info.dli_fbase || !info.dli_fname)
+	{
+		return false;
+	}
+
+	/* This is for our insane sanity checks :o */
+	baseAddr = reinterpret_cast<unsigned long>(info.dli_fbase);
+	file = reinterpret_cast<Elf32_Ehdr *>(baseAddr);
+
+	/* Check ELF magic */
+	if (memcmp(ELFMAG, file->e_ident, SELFMAG) != 0)
+	{
+		return false;
+	}
+
+	/* Check ELF version */
+	if (file->e_ident[EI_VERSION] != EV_CURRENT)
+	{
+		return false;
+	}
+
+	/* Check ELF architecture, which is 32-bit/x86 right now
+	 * Should change this for 64-bit if Valve gets their act together
+	 */
+	if (file->e_ident[EI_CLASS] != ELFCLASS32 || file->e_machine != EM_386 || file->e_ident[EI_DATA] != ELFDATA2LSB)
+	{
+		return false;
+	}
+
+	/* For our purposes, this must be a dynamic library/shared object */
+	if (file->e_type != ET_DYN)
+	{
+		return false;
+	}
+
+	phdrCount = file->e_phnum;
+	phdr = reinterpret_cast<Elf32_Phdr *>(baseAddr + file->e_phoff);
+	
+	/* Add up the memory sizes of segments marked as PT_LOAD as those are the only ones that should be in memory */
+	for (uint16_t i = 0; i < phdrCount; i++)
+	{
+		Elf32_Phdr &hdr = phdr[i];
+
+		if (hdr.p_type == PT_LOAD)
+		{
+			lib.memorySize += hdr.p_memsz;
+		}
+	}
+
+#endif
+
+	lib.baseAddress = reinterpret_cast<void *>(baseAddr);
+
+	return true;
+}