noexecute.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <pseh/pseh.h>

Include dependency graph for noexecute.c:

Go to the source code of this file.

Functions
int	test (int x)
void	execute (char *message, int(*func)(int))
int	main (void)

Variables
char	data [100]

Function Documentation

execute()

void execute	(	char *	message,
		int(*)(int)	func
	)

Definition at line 13 of file noexecute.c.

{
   ULONG status = 0;
   ULONG result;
 
   printf("%s ... ", message);
 
   _SEH_TRY
   {
      result = func(1);
   }
   _SEH_HANDLE
   {
      status = _SEH_GetExceptionCode();
   }
   _SEH_END;
   if (status == 0)
   {
       printf("OK.\n");
   }
   else
   {
       printf("Error, status=%lx.\n", status);
   }
}

Referenced by add_file_data(), and main().

main()

int main

(

void

)

Definition at line 41 of file noexecute.c.

{
    unsigned char stack[100];
    void* heap;
    ULONG protection;
 
    printf("NoExecute\n");
 
    execute("Executing within the code segment", test);
    memcpy(data, test, 100);
    execute("Executing within the data segment", (int(*)(int))data);
    memcpy(stack, test, 100);
    execute("Executing on stack segment", (int(*)(int))stack);
    heap = VirtualAlloc(NULL, 100, MEM_COMMIT, PAGE_READWRITE);
    memcpy(heap, test, 100);
    execute("Executing on the heap with protection PAGE_READWRITE", (int(*)(int))heap);
    VirtualProtect(heap, 100, PAGE_EXECUTE, &protection);
    execute("Executing on the heap with protection PAGE_EXECUTE", (int(*)(int))heap);
 
    return 0;
}

test()

int test

(

int

x

)

Definition at line 8 of file noexecute.c.

{
    return x+1;
}

Variable Documentation

data

char data[100]

Definition at line 39 of file noexecute.c.