rostests/apitests/w32knapi/w32knapi.c

   1 #include "w32knapi.h"
   2
   3 HINSTANCE g_hInstance;
   4 HMODULE g_hModule = NULL;
   5
   6 static DWORD STDCALL
   7 IntSyscall(FARPROC proc, UINT cParams, PVOID pFirstParam)
   8 {
   9         DWORD ret;
  10
  11         asm volatile
  12         (
  13                 "pushfl;"                               // Save flags
  14                 "movl %%ecx, %%eax;"
  15                 "shl $2, %%eax;"                // Calculate param size
  16                 "subl %%eax, %%esp;"    // Calculate new stack pos
  17                 "movl %%esp, %%edi;"    // Destination is stackpointer
  18                 "cld;"                                  // Clear direction flag
  19                 "rep movsd;"                    // Copy params to the stack
  20                 "call *%%edx;"                  // Call function
  21                 "popfl;"                                // Restore flags
  22                 : "=a" (ret)
  23                 : "S" (pFirstParam), "c" (cParams), "d"(proc)
  24                 : "%edi"
  25         );
  26
  27         return ret;
  28 }
  29
  30 DWORD
  31 Syscall(LPWSTR pszFunction, int cParams, void* pParams)
  32 {
  33         char szFunctionName[MAX_PATH];
  34
  35         sprintf(szFunctionName, "%ls", pszFunction);
  36         FARPROC proc = (FARPROC)GetProcAddress(g_hModule, szFunctionName);
  37         if (!proc)
  38         {
  39                 printf("Couldn't find proc: %s\n", szFunctionName);
  40                 return FALSE;
  41         }
  42
  43         return IntSyscall(proc, cParams, pParams);
  44 }
  45
  46 BOOL
  47 IsFunctionPresent(LPWSTR lpszFunction)
  48 {
  49         char szFunctionName[MAX_PATH];
  50         sprintf(szFunctionName, "%ls", lpszFunction);
  51         return (GetProcAddress(g_hModule, szFunctionName) != NULL);
  52 }
  53
  54 int APIENTRY
  55 WinMain(HINSTANCE hInstance,
  56         HINSTANCE hPrevInstance,
  57         LPSTR     lpCmdLine,
  58         int       nCmdShow)
  59 {
  60         g_hInstance = hInstance;
  61
  62         printf("Win32k native API test\n");
  63
  64         /* Convert to gui thread */
  65         // IsGUIThread(TRUE); <- does not exists on win2k
  66
  67         g_hModule = LoadLibraryW(L"w32kdll.dll");
  68         if (!g_hModule)
  69         {
  70                 printf("w32kdll.dll not found!\n");
  71                 return FALSE;
  72         }
  73
  74         printf("\n");
  75
  76         return TestMain(L"w32knapi", L"win32k.sys Nt-Api");
  77 }