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608c1e0428
- Move all the console subsystem from win32csr to a new server dll called consrv.dll (instead of putting it directly to winsrv.dll). It's because I want to rework on this later on. Many things must be done in order to achieve the moving (renaming functions, etc...). Tables & symbol names come from http://j00ru.vexillium.org/csrss_list/api_list.html as usual, but here I took the Win 2k3 ones and I added few Win 7 functions which already existed in our codebase. The other table names are guessed based on what originally existed in csrsrv and so on. Many stubs are also missing. Cultural remark: consrv.dll originally existed in Beta releases of Windows NT 3.1 (e.g. the October 1991 one), but was soon merged with winsrv.dll and thus, in subsequent versions of Windows, the console subsystem is also found in winsrv.dll. See http://www.logotypes.se/NT310CSRSS.txt and http://j00ru.vexillium.org/?p=349#comment-1883. One has to wait until Windows 7 to see it moving again to conhost.exe. [CSRSRV] - Add an explanation comment on what the ValidTable member in the CSR_SERVER_DLL structure is for. svn path=/branches/ros-csrss/; revision=57597
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Console Server DLL
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* FILE: win32ss/user/consrv/init.c
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* PURPOSE: Initialization
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#include "consrv.h"
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#define NDEBUG
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#include <debug.h>
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/* Ensure that a captured buffer is safe to access */
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BOOL FASTCALL
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Win32CsrValidateBuffer(PCSR_PROCESS ProcessData, PVOID Buffer,
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SIZE_T NumElements, SIZE_T ElementSize)
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{
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/* Check that the following conditions are true:
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* 1. The start of the buffer is somewhere within the process's
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* shared memory section view.
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* 2. The remaining space in the view is at least as large as the buffer.
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* (NB: Please don't try to "optimize" this by using multiplication
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* instead of division; remember that 2147483648 * 2 = 0.)
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* 3. The buffer is DWORD-aligned.
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*/
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ULONG_PTR Offset = (BYTE *)Buffer - (BYTE *)ProcessData->ClientViewBase;
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if (Offset >= ProcessData->ClientViewBounds
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|| NumElements > (ProcessData->ClientViewBounds - Offset) / ElementSize
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|| (Offset & (sizeof(DWORD) - 1)) != 0)
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{
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DPRINT1("Invalid buffer %p(%u*%u); section view is %p(%u)\n",
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Buffer, NumElements, ElementSize,
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ProcessData->ClientViewBase, ProcessData->ClientViewBounds);
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return FALSE;
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}
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return TRUE;
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}
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/* EOF */
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