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ea28951607
This is intentionally not part of ntdll_apitest, because that links to advapi32, which links to rpcrt4, which (wrongly!) links to ws2_32, which (wrongly!) links to user32, which breaks the test.
314 lines
11 KiB
C
314 lines
11 KiB
C
/*
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* PROJECT: ReactOS API Tests
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* LICENSE: LGPL-2.0-or-later (https://spdx.org/licenses/LGPL-2.0-or-later)
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* PURPOSE: Tests for system calls
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* COPYRIGHT: Copyright 2024 Timo Kreuzer <timo.kreuzer@reactos.org>
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*/
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#include "precomp.h"
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#define EFLAGS_TF 0x100L
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#define EFLAGS_INTERRUPT_MASK 0x200L
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ULONG g_NoopSyscallNumber = 0;
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ULONG g_HandlerCalled = 0;
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ULONG g_RandomSeed = 0x63c28b49;
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VOID
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DoSyscallAndCaptureContext(
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_In_ ULONG SyscallNumber,
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_Out_ PCONTEXT PreContext,
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_Out_ PCONTEXT PostContext);
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extern const UCHAR SyscallReturn;
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ULONG_PTR
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DoSyscallWithUnalignedStack(
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_In_ ULONG64 SyscallNumber);
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#ifdef _M_IX86
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__declspec(dllimport)
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VOID
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NTAPI
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KiFastSystemCallRet(VOID);
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#endif
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static
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BOOLEAN
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InitSysCalls()
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{
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/* Scan instructions in NtFlushWriteBuffer to find the syscall number
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for NtFlushWriteBuffer, which is a noop syscall on x86/x64 */
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PUCHAR Instructions = (PUCHAR)NtFlushWriteBuffer;
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for (ULONG i = 0; i < 32; i++)
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{
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if (Instructions[i] == 0xB8)
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{
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g_NoopSyscallNumber = *(PULONG)&Instructions[i + 1];
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return TRUE;
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}
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}
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return FALSE;
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}
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static
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VOID
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LoadUser32()
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{
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HMODULE hUser32 = LoadLibraryW(L"user32.dll");
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ok(hUser32 != NULL, "Failed to load user32.dll\n");
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}
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static
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LONG
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WINAPI
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VectoredExceptionHandlerForUserModeCallback(
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struct _EXCEPTION_POINTERS *ExceptionInfo)
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{
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g_HandlerCalled++;
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/* Return from the callback */
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NtCallbackReturn(NULL, 0, 0xdeadbeef);
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/* If that failed, we were not in a callback, keep searching */
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return EXCEPTION_CONTINUE_SEARCH;
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}
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VOID
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ValidateSyscall_(
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_In_ PCCH File,
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_In_ ULONG Line,
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_In_ ULONG_PTR SyscallId,
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_In_ ULONG_PTR Result)
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{
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CONTEXT PreContext, PostContext;
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#ifdef _M_IX86
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DoSyscallAndCaptureContext(SyscallId, &PreContext, &PostContext);
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/* Non-volatile registers and rsp are unchanged */
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ok_eq_hex_(File, Line, PostContext.Esp, PreContext.Esp);
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ok_eq_hex_(File, Line, PostContext.Ebx, PreContext.Ebx);
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ok_eq_hex_(File, Line, PostContext.Esi, PreContext.Esi);
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ok_eq_hex_(File, Line, PostContext.Edi, PreContext.Edi);
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ok_eq_hex_(File, Line, PostContext.Ebp, PreContext.Ebp);
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/* Special cases */
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ok_eq_hex_(File, Line, PostContext.Ecx, PreContext.Esp - 0x4C);
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ok_eq_hex_(File, Line, PostContext.Edx, (ULONG)KiFastSystemCallRet);
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ok_eq_hex_(File, Line, PostContext.Eax, Result);
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#elif defined(_M_AMD64)
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/* Initiaize the pre-contex with random numbers */
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PULONG64 IntegerRegs = &PreContext.Rax;
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PM128A XmmRegs = &PreContext.Xmm0;
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for (ULONG Index = 0; Index < 16; Index++)
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{
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IntegerRegs[Index] = (ULONG64)RtlRandom(&g_RandomSeed) << 32 | RtlRandom(&g_RandomSeed);
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XmmRegs[Index].Low = (ULONG64)RtlRandom(&g_RandomSeed) << 32 | RtlRandom(&g_RandomSeed);
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XmmRegs[Index].High = (ULONG64)RtlRandom(&g_RandomSeed) << 32 | RtlRandom(&g_RandomSeed);
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}
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PreContext.EFlags = RtlRandom(&g_RandomSeed);
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PreContext.EFlags &= ~(EFLAGS_TF | 0x20 | 0x40000);
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PreContext.EFlags |= EFLAGS_INTERRUPT_MASK;
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PreContext.SegDs = 0; //0x0028;
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PreContext.SegEs = 0; //0x002B;
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PreContext.SegFs = 0; //0x0053;
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PreContext.SegGs = 0; //0x002B;
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PreContext.SegSs = 0; // 0x002B;
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DoSyscallAndCaptureContext(SyscallId, &PreContext, &PostContext);
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/* Non-volatile registers and rsp are unchanged */
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ok_eq_hex64_(File, Line, PostContext.Rsp, PreContext.Rsp);
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ok_eq_hex64_(File, Line, PostContext.Rbx, PreContext.Rbx);
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ok_eq_hex64_(File, Line, PostContext.Rsi, PreContext.Rsi);
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ok_eq_hex64_(File, Line, PostContext.Rdi, PreContext.Rdi);
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ok_eq_hex64_(File, Line, PostContext.Rbp, PreContext.Rbp);
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ok_eq_hex64_(File, Line, PostContext.R12, PreContext.R12);
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ok_eq_hex64_(File, Line, PostContext.R13, PreContext.R13);
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ok_eq_hex64_(File, Line, PostContext.R14, PreContext.R14);
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ok_eq_hex64_(File, Line, PostContext.R15, PreContext.R15);
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ok_eq_hex64_(File, Line, PostContext.Xmm6.Low, PreContext.Xmm6.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm6.High, PreContext.Xmm6.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm7.Low, PreContext.Xmm7.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm7.High, PreContext.Xmm7.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm8.Low, PreContext.Xmm8.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm8.High, PreContext.Xmm8.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm9.Low, PreContext.Xmm9.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm9.High, PreContext.Xmm9.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm10.Low, PreContext.Xmm10.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm10.High, PreContext.Xmm10.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm11.Low, PreContext.Xmm11.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm11.High, PreContext.Xmm11.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm12.Low, PreContext.Xmm12.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm12.High, PreContext.Xmm12.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm13.Low, PreContext.Xmm13.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm13.High, PreContext.Xmm13.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm14.Low, PreContext.Xmm14.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm14.High, PreContext.Xmm14.High);
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ok_eq_hex64_(File, Line, PostContext.Xmm15.Low, PreContext.Xmm15.Low);
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ok_eq_hex64_(File, Line, PostContext.Xmm15.High, PreContext.Xmm15.High);
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/* Parity flag is flaky */
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ok_eq_hex64_(File, Line, PostContext.EFlags & ~0x4, PreContext.EFlags & ~0x9F5);
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ok_eq_hex64_(File, Line, PostContext.SegCs, 0x0033);
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ok_eq_hex64_(File, Line, PostContext.SegSs, 0x002B);
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ok_(File, Line)(PostContext.SegDs == PreContext.SegDs || PostContext.SegDs == 0x002B,
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"Expected 0x002B, got 0x%04X\n", PostContext.SegDs);
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ok_(File, Line)(PostContext.SegEs == PreContext.SegEs || PostContext.SegEs == 0x002B,
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"Expected 0x002B, got 0x%04X\n", PostContext.SegEs);
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ok_(File, Line)(PostContext.SegFs == PreContext.SegFs || PostContext.SegFs == 0x0053,
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"Expected 0x002B, got 0x%04X\n", PostContext.SegFs);
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ok_(File, Line)(PostContext.SegGs == PreContext.SegGs || PostContext.SegGs == 0x002B,
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"Expected 0x002B, got 0x%04X\n", PostContext.SegGs);
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ok_eq_hex64_(File, Line, PostContext.SegSs, 0x002B);
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/* These volatile registers are zeroed */
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ok_eq_hex64_(File, Line, PostContext.Rdx, 0);
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ok_eq_hex64_(File, Line, PostContext.R10, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm0.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm0.High, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm1.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm1.High, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm2.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm2.High, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm3.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm3.High, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm4.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm4.High, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm5.Low, 0);
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ok_eq_hex64_(File, Line, PostContext.Xmm5.High, 0);
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/* Special cases */
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ok_eq_hex64_(File, Line, PostContext.Rax, Result);
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ok_eq_hex64_(File, Line, PostContext.Rcx, (ULONG64)&SyscallReturn);
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ok_eq_hex64_(File, Line, PostContext.R8, PreContext.Rsp);
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ok_eq_hex64_(File, Line, PostContext.R9, PreContext.Rbp);
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ok_eq_hex64_(File, Line, PostContext.R11, PostContext.EFlags);
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// TODO:Debug regs, mxcsr, floating point, etc.
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#else
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#error Unsupported architecture
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#endif
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}
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#define ValidateSyscall(SyscallId, Result) ValidateSyscall_(__FILE__, __LINE__, SyscallId, Result)
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static
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VOID
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Test_SyscallNumbers()
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{
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BOOL Wow64Process;
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if (IsWow64Process(NtCurrentProcess(), &Wow64Process) && Wow64Process)
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{
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skip("Skipping syscall tests on WOW64\n");
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return;
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}
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/* Test valid syscall number */
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ValidateSyscall(g_NoopSyscallNumber, STATUS_SUCCESS);
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/* Test invalid syscall number */
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ValidateSyscall(0x0FFF, (ULONG)STATUS_INVALID_SYSTEM_SERVICE);
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/* Add a vectored exception handler to catch the exception we will get
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when KiUserCallbackDispatcher is called and user32.dll is not loaded
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We cannot use SEH here, because the exception is outside of the try block */
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PVOID hHandler = AddVectoredExceptionHandler(TRUE, VectoredExceptionHandlerForUserModeCallback);
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ok(hHandler != NULL, "Failed to add vectored exception handler\n");
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/* Test win32k syscall number without user32.dll loaded */
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#ifdef _M_AMD64
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ValidateSyscall(0x1000, STATUS_SUCCESS);
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#else
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ValidateSyscall(0x1000, (ULONG)STATUS_INVALID_SYSTEM_SERVICE);
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#endif
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ok_eq_ulong(g_HandlerCalled, 1UL);
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/* Test invalid win32k syscall number without user32.dll loaded */
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#ifdef _M_IX86
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ValidateSyscall(0x1FFF, 0xffffffbf);
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#else
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ValidateSyscall(0x1FFF, (ULONG)STATUS_INVALID_SYSTEM_SERVICE);
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#endif
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ok_eq_ulong(g_HandlerCalled, 2UL);
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RemoveVectoredExceptionHandler(hHandler);
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LoadUser32();
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/* Test invalid win32k syscall number */
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#ifdef _M_IX86
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ValidateSyscall(0x1FFF, 0xffffffbf);
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#else
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ValidateSyscall(0x1FFF, (ULONG)STATUS_INVALID_SYSTEM_SERVICE);
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#endif
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/* Test invalid syscall table number */
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ValidateSyscall(0x2000 + g_NoopSyscallNumber, STATUS_SUCCESS);
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ValidateSyscall(0x3000 + g_NoopSyscallNumber, STATUS_SUCCESS);
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#if 0 // This only happens, when running the test from VS, but not from the command line
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/* For some unknown reason the result gets sign extended in this case */
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ULONG64 Result = DoSyscallWithUnalignedStack(0x2000);
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ok_eq_hex64(Result, (LONG)STATUS_ACCESS_VIOLATION);
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#endif
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/* Test invalid upper bits in syscall number */
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ValidateSyscall(0xFFFFFFFFFFF70000ULL + g_NoopSyscallNumber, STATUS_SUCCESS);
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}
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static
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VOID
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Test_SyscallPerformance()
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{
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ULONG64 Start, End, Cycles;
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ULONG64 TotalCycles = 0, Min = -1, Max = 0;
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ULONG64 Count = 100000;
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ULONG Outliers = 0;
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ULONG_PTR OldAffinityMask;
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double AvgCycles;
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OldAffinityMask = SetThreadAffinityMask(GetCurrentThread(), 1);
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for (ULONG64 i = 0; i < Count; i++)
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{
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Start = __rdtsc();
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NtFlushWriteBuffer();
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End = __rdtsc();
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Cycles = End - Start;
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if (Cycles > 2000)
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{
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Outliers++;
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continue;
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}
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TotalCycles += Cycles;
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Min = min(Min, Cycles);
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Max = max(Max, Cycles);
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}
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AvgCycles = (double)TotalCycles / (Count - Outliers);
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trace("NtFlushWriteBuffer: avg %.2f cycles, min %I64u, max %I64u, Outliers %lu\n",
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AvgCycles, Min, Max, Outliers);
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SetThreadAffinityMask(GetCurrentThread(), OldAffinityMask);
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}
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START_TEST(SystemCall)
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{
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if (!InitSysCalls())
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{
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skip("Failed to initialize.\n");
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return;
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}
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Test_SyscallNumbers();
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Test_SyscallPerformance();
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}
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