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/*
* Simple test program to demonstrate memory overwrite.
*
* $Id$
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
typedef struct {
uint32_t TooShortArray[8];
uint32_t RandomVariable;
uint32_t CorruptedVariable;
} Struct_t;
Struct_t S;
void writeEntry(int index, uint32_t value);
int main(
int argc,
char **argv
)
{
puts( "\n\n*** MEMORY CORRUPTION EXAMPLE ***" );
/* initialize global variables */
memset( &S, 0, sizeof(S) );
S.RandomVariable = 0x1234;
S.CorruptedVariable = 0x5678;
printf(
"&TooShortArray[0] = %p\n"
"&TooShortArray[7] = %p\n"
"&RandomVariable = %p\n"
"&CorruptedVariable = %p\n",
&S.TooShortArray[0],
&S.TooShortArray[7],
&S.RandomVariable,
&S.CorruptedVariable
);
/* write past end of array */
writeEntry( 8, 0xdeadf00d );
writeEntry( 9, 0x0badd00d );
printf(
"RandomVariable = 0x%08x\n"
"CorruptedVariable = 0x%08x\n",
S.RandomVariable,
S.CorruptedVariable
);
puts( "*** END OF MEMORY CORRUPTION EXAMPLE ***" );
exit( 0 );
}
void writeEntry(int index, uint32_t value)
{
S.TooShortArray[index] = value;
}
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