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99 lines
2 KiB
C
99 lines
2 KiB
C
#include "w32knapi.h"
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HINSTANCE g_hInstance;
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HMODULE g_hModule = NULL;
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PGDI_TABLE_ENTRY GdiHandleTable;
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static
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PGDI_TABLE_ENTRY
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MyGdiQueryTable()
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{
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PTEB pTeb = NtCurrentTeb();
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PPEB pPeb = pTeb->ProcessEnvironmentBlock;
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return pPeb->GdiSharedHandleTable;
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}
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static DWORD WINAPI
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IntSyscall(FARPROC proc, UINT cParams, PVOID pFirstParam)
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{
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DWORD ret;
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asm volatile
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(
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"pushfl;" // Save flags
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"movl %%ecx, %%eax;"
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"shl $2, %%eax;" // Calculate param size
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"subl %%eax, %%esp;" // Calculate new stack pos
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"movl %%esp, %%edi;" // Destination is stackpointer
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"cld;" // Clear direction flag
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"rep movsd;" // Copy params to the stack
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"call *%%edx;" // Call function
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"popfl;" // Restore flags
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: "=a" (ret)
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: "S" (pFirstParam), "c" (cParams), "d"(proc)
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: "%edi"
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);
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return ret;
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}
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DWORD
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Syscall(LPWSTR pszFunction, int cParams, void* pParams)
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{
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char szFunctionName[MAX_PATH];
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sprintf(szFunctionName, "%ls", pszFunction);
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FARPROC proc = (FARPROC)GetProcAddress(g_hModule, szFunctionName);
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if (!proc)
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{
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printf("Couldn't find proc: %s\n", szFunctionName);
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return FALSE;
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}
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return IntSyscall(proc, cParams, pParams);
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}
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BOOL
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IsFunctionPresent(LPWSTR lpszFunction)
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{
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char szFunctionName[MAX_PATH];
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sprintf(szFunctionName, "%ls", lpszFunction);
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return (GetProcAddress(g_hModule, szFunctionName) != NULL);
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}
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int APIENTRY
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WinMain(HINSTANCE hInstance,
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HINSTANCE hPrevInstance,
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LPSTR lpCmdLine,
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int nCmdShow)
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{
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g_hInstance = hInstance;
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printf("Win32k native API test\n");
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/* Convert to gui thread */
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// IsGUIThread(TRUE); <- does not exists on win2k
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InitOsVersion();
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printf("g_OsIdx = %d\n", g_OsIdx);
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g_hModule = LoadLibraryW(L"w32kdll.dll");
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if (!g_hModule)
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{
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printf("w32kdll.dll not found!\n");
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return -1;
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}
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GdiHandleTable = MyGdiQueryTable();
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if(!GdiHandleTable)
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{
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FreeLibrary(g_hModule);
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printf("GdiHandleTable not found!\n");
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return -1;
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}
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printf("\n");
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return TestMain(L"w32knapi", L"win32k.sys Nt-Api");
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}
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