reactos/dll/appcompat/apphelp/shimeng.c

   1 /*
   2  * Copyright 2015-2017 Mark Jansen
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define WIN32_NO_STATUS
  20 #include "windows.h"
  21 #include "ntndk.h"
  22 #include "shimlib.h"
  23 #include <strsafe.h>
  24
  25 HANDLE g_pShimEngModHandle = 0;
  26
  27
  28 ULONG g_ShimEngDebugLevel = 0xffffffff;
  29
  30
  31
  32
  33 VOID SeiInitDebugSupport(VOID)
  34 {
  35     static const UNICODE_STRING DebugKey = RTL_CONSTANT_STRING(L"SHIMENG_DEBUG_LEVEL");
  36     UNICODE_STRING DebugValue;
  37     NTSTATUS Status;
  38     ULONG NewLevel = 0;
  39     WCHAR Buffer[40];
  40
  41     RtlInitEmptyUnicodeString(&DebugValue, Buffer, sizeof(Buffer));
  42
  43     Status = RtlQueryEnvironmentVariable_U(NULL, &DebugKey, &DebugValue);
  44
  45     if (NT_SUCCESS(Status))
  46     {
  47         if (!NT_SUCCESS(RtlUnicodeStringToInteger(&DebugValue, 10, &NewLevel)))
  48             NewLevel = 0;
  49     }
  50     g_ShimEngDebugLevel = NewLevel;
  51 }
  52
  53
  54 /**
  55  * Outputs diagnostic info.
  56  *
  57  * @param [in]  Level           The level to log this message with, choose any of [SHIM_ERR,
  58  *                              SHIM_WARN, SHIM_INFO].
  59  * @param [in]  FunctionName    The function this log should be attributed to.
  60  * @param [in]  Format          The format string.
  61  * @param   ...                 Variable arguments providing additional information.
  62  *
  63  * @return  Success: TRUE Failure: FALSE.
  64  */
  65 BOOL WINAPIV SeiDbgPrint(SEI_LOG_LEVEL Level, PCSTR Function, PCSTR Format, ...)
  66 {
  67     char Buffer[512];
  68     char* Current = Buffer;
  69     const char* LevelStr;
  70     size_t Length = sizeof(Buffer);
  71     va_list ArgList;
  72     HRESULT hr;
  73
  74     if (g_ShimEngDebugLevel == 0xffffffff)
  75         SeiInitDebugSupport();
  76
  77     if (Level > g_ShimEngDebugLevel)
  78         return FALSE;
  79
  80     switch (Level)
  81     {
  82     case SEI_MSG:
  83         LevelStr = "MSG ";
  84         break;
  85     case SEI_FAIL:
  86         LevelStr = "FAIL";
  87         break;
  88     case SEI_WARN:
  89         LevelStr = "WARN";
  90         break;
  91     case SEI_INFO:
  92         LevelStr = "INFO";
  93         break;
  94     default:
  95         LevelStr = "USER";
  96         break;
  97     }
  98
  99     if (Function)
 100         hr = StringCchPrintfExA(Current, Length, &Current, &Length, STRSAFE_NULL_ON_FAILURE, "[%s] [%s] ", LevelStr, Function);
 101     else
 102         hr = StringCchPrintfExA(Current, Length, &Current, &Length, STRSAFE_NULL_ON_FAILURE, "[%s] ", LevelStr);
 103
 104     if (!SUCCEEDED(hr))
 105         return FALSE;
 106
 107     va_start(ArgList, Format);
 108     hr = StringCchVPrintfExA(Current, Length, &Current, &Length, STRSAFE_NULL_ON_FAILURE, Format, ArgList);
 109     va_end(ArgList);
 110     if (!SUCCEEDED(hr))
 111         return FALSE;
 112
 113     DbgPrint("%s", Buffer);
 114     return TRUE;
 115 }
 116
 117
 118
 119
 120
 121
 122 VOID NotifyShims(DWORD dwReason, PVOID Info)
 123 {
 124     /* Enumerate all loaded shims */
 125 }
 126
 127
 128 VOID NTAPI SE_InstallBeforeInit(PUNICODE_STRING ProcessImage, PVOID pShimData)
 129 {
 130     SHIMENG_FAIL("(%wZ, %p)", ProcessImage, pShimData);
 131     /* Find & Load all shims.. */
 132 }
 133
 134 VOID NTAPI SE_InstallAfterInit(PUNICODE_STRING ProcessImage, PVOID pShimData)
 135 {
 136     SHIMENG_FAIL("(%wZ, %p)", ProcessImage, pShimData);
 137     NotifyShims(SHIM_NOTIFY_ATTACH, NULL);
 138 }
 139
 140 VOID NTAPI SE_ProcessDying(VOID)
 141 {
 142     SHIMENG_FAIL("()");
 143     NotifyShims(SHIM_NOTIFY_DETACH, NULL);
 144 }
 145
 146 VOID WINAPI SE_DllLoaded(PLDR_DATA_TABLE_ENTRY LdrEntry)
 147 {
 148     SHIMENG_FAIL("(%p)", LdrEntry);
 149     NotifyShims(SHIM_REASON_DLL_LOAD, LdrEntry);
 150 }
 151
 152 VOID WINAPI SE_DllUnloaded(PLDR_DATA_TABLE_ENTRY LdrEntry)
 153 {
 154     SHIMENG_FAIL("(%p)", LdrEntry);
 155     NotifyShims(SHIM_REASON_DLL_UNLOAD, LdrEntry);
 156 }
 157
 158 BOOL WINAPI SE_IsShimDll(PVOID BaseAddress)
 159 {
 160     SHIMENG_FAIL("(%p)", BaseAddress);
 161     return FALSE;
 162 }
 163