huwcampbell.com
Reactos
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <windows.h>
5
6#include <pseh/pseh.h>
7
8int test(int x)
9{
10 return x+1;
11}
12
13void execute(char* message, int(*func)(int))
14{
15 ULONG status = 0;
16 ULONG result;
17
18 printf("%s ... ", message);
19
20 _SEH_TRY
21 {
22 result = func(1);
23 }
24 _SEH_HANDLE
25 {
26 status = _SEH_GetExceptionCode();
27 }
28 _SEH_END;
29 if (status == 0)
30 {
31 printf("OK.\n");
32 }
33 else
34 {
35 printf("Error, status=%lx.\n", status);
36 }
37}
38
39char data[100];
40
41int main(void)
42{
43 unsigned char stack[100];
44 void* heap;
45 ULONG protection;
46
47 printf("NoExecute\n");
48
49 execute("Executing within the code segment", test);
50 memcpy(data, test, 100);
51 execute("Executing within the data segment", (int(*)(int))data);
52 memcpy(stack, test, 100);
53 execute("Executing on stack segment", (int(*)(int))stack);
54 heap = VirtualAlloc(NULL, 100, MEM_COMMIT, PAGE_READWRITE);
55 memcpy(heap, test, 100);
56 execute("Executing on the heap with protection PAGE_READWRITE", (int(*)(int))heap);
57 VirtualProtect(heap, 100, PAGE_EXECUTE, &protection);
58 execute("Executing on the heap with protection PAGE_EXECUTE", (int(*)(int))heap);
59
60 return 0;
61}