84 lines
2 KiB
C
84 lines
2 KiB
C
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// utxcpt1.c - user mode structured exception handling test 1
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#include <ntos.h>
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main()
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{
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LONG i, j;
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PULONG p4, p3, p2, p1;
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ULONG Size1, Size2, Size3;
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NTSTATUS status;
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HANDLE CurrentProcessHandle;
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MEMORY_BASIC_INFORMATION MemInfo;
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ULONG OldProtect;
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STRING Name3;
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HANDLE Section1;
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OBJECT_ATTRIBUTES ObjectAttributes;
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ULONG ViewSize, Offset;
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CurrentProcessHandle = NtCurrentProcess();
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for(i=0;i<3;i++){
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DbgPrint("Hello World...\n\n");
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}
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DbgPrint("allocating virtual memory\n");
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p1 = (PULONG)NULL;
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Size1 = 5*4096;
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status = NtAllocateVirtualMemory (CurrentProcessHandle, (PVOID)&p1,
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0, &Size1, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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DbgPrint("created vm status %X start %lx size %lx\n",
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status, (ULONG)p1, Size1);
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p2 = p1;
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*p2 = 99;
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Size2 = 4;
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status = NtProtectVirtualMemory (CurrentProcessHandle, (PVOID)&p2,
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&Size2, PAGE_GUARD | PAGE_READONLY, &OldProtect);
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DbgPrint("protected VM status %X, base %lx, size %lx, old protect %lx\n",
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status, p2, Size2, OldProtect);
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p3 = p1 + 1024;
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*p3 =91;
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Size2 = 4;
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status = NtProtectVirtualMemory (CurrentProcessHandle, (PVOID)&p3,
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&Size2, PAGE_NOACCESS, &OldProtect);
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DbgPrint("protected VM status %X, base %lx, size %lx, old protect %lx\n",
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status, p3, Size2, OldProtect);
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try {
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*p2 = 94;
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} except (EXCEPTION_EXECUTE_HANDLER) {
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status = GetExceptionCode();
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DbgPrint("got an exception of %X\n",status);
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}
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try {
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i = *p2;
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} except (EXCEPTION_EXECUTE_HANDLER) {
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status = GetExceptionCode();
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DbgPrint("got an exception of %X\n",status);
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}
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DbgPrint("value of p2 should be 94 is %ld\n",*p2);
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try {
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*p3 = 94;
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} except (EXCEPTION_EXECUTE_HANDLER) {
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status = GetExceptionCode();
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DbgPrint("got an exception of %X\n",status);
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}
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return 0;
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}
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