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138 lines
4.3 KiB
C++
138 lines
4.3 KiB
C++
/*
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** autostart.cpp
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** This file contains the heads of lists stored in special data segments
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2005 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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** The particular scheme used here was chosen because it's small.
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**
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** An alternative that will work with any C++ compiler is to use static
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** classes to build these lists at run time. Under Visual C++, doing things
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** that way can require a lot of extra space, which is why I'm doing things
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** this way.
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**
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** In the case of PClass lists (section creg), I orginally used the
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** constructor to do just that, and the code for that still exists if you
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** compile with something other than Visual C++ or GCC.
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*/
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#include "autosegs.h"
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#if defined(_MSC_VER)
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#pragma comment(linker, "/merge:.areg=.data /merge:.creg=.data /merge:.greg=.data /merge:.sreg=.data /merge:.wreg=.data")
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#pragma data_seg(".areg$a")
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void *ARegHead = 0;
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#pragma data_seg(".creg$a")
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void *CRegHead = 0;
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#pragma data_seg(".greg$a")
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void *GRegHead = 0;
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#pragma data_seg(".sreg$a")
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void *SRegHead = 0;
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#pragma data_seg()
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#elif defined(__GNUC__)
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#ifndef _WIN32
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void *ARegHead __attribute__((section("areg"))) = 0;
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void *CRegHead __attribute__((section("creg"))) = 0;
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void *GRegHead __attribute__((section("greg"))) = 0;
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void *SRegHead __attribute__((section("sreg"))) = 0;
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#else
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// I can't find any way to specify the order to link files with
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// Dev C++, so when compiling with GCC under WIN32, I inspect
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// the executable instead of letting the linker do all the work for
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// me.
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void **ARegHead;
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void **CRegHead;
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void **GRegHead;
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void **SRegHead;
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#endif
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#elif
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#error Please fix autostart.cpp for your compiler
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#endif
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#ifdef REGEXEPEEK
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <winnt.h>
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struct AutoSegStuff
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{
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char name[IMAGE_SIZEOF_SHORT_NAME];
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REGINFO *HeadPtr;
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REGINFO *TailPtr;
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};
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static const AutoSegStuff Stuff[5] =
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{
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{ "areg", &ARegHead, &ARegTail },
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{ "creg", &CRegHead, &CRegTail },
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{ "greg", &GRegHead, &GRegTail },
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{ "sreg", &SRegHead, &SRegTail },
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};
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void InitAutoSegMarkers ()
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{
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BYTE *module = (BYTE *)GetModuleHandle (NULL);
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IMAGE_DOS_HEADER *dosHeader = (IMAGE_DOS_HEADER *)module;
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IMAGE_NT_HEADERS *ntHeaders = (IMAGE_NT_HEADERS *)(module + dosHeader->e_lfanew);
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IMAGE_SECTION_HEADER *sections = IMAGE_FIRST_SECTION (ntHeaders);
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int i, j;
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for (i = 0; i < 5; ++i)
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{
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for (j = 0; j < ntHeaders->FileHeader.NumberOfSections; ++j)
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{
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if (memcmp (sections[j].Name, Stuff[i].name, IMAGE_SIZEOF_SHORT_NAME) == 0)
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{
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*Stuff[i].HeadPtr = (REGINFO)(sections[j].VirtualAddress + module - 4);
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*Stuff[i].TailPtr = (REGINFO)(sections[j].VirtualAddress + module + sections[j].Misc.VirtualSize);
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break;
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}
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}
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}
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}
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#endif
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