int main()
{
struct mine {
char* a ;
char x[20] ;
float z ;
} i;
union crazy {
float a ;
char b ;
int s ;
} a ;
char x[50] ;
spray_paint( (char *) &i, sizeof(i), 0xd1, "main.i" ) ;
spray_paint( (char *) &a, sizeof(a), 0xd2, "main.a" ) ;
spray_paint( (char *) &x, sizeof(x), 0xd3, "main.x" ) ;
sub1() ;
return 0 ;
}
void sub2()
{
int i ;
char* a ;
char x[20] ;
spray_paint( (char *) &i, sizeof(i), 0xf1, "sub2.i" ) ;
spray_paint( (char *) &a, sizeof(a), 0xf2, "sub2.a" ) ;
spray_paint( (char *) &x, sizeof(x), 0xf3, "sub2.x" ) ;
printf ( "Min= %p Max= %p\n", min_ptr, max_ptr ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
//
// save/destroy the stack here (don't forget to use an external save area)
//
z=(char *) malloc(max_ptr-min_ptr+1);
for (m=0;m<max_ptr-min_ptr+1;m++)
*(z+m)=*(min_ptr+m);
for (m=0;m<max_ptr-min_ptr+1;m++)
*(min_ptr+m)=00;
printf( " destroyed stack\n" ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
//
// restore the stack here
//
for (m=0;m<max_ptr-min_ptr+1;m++)
*(min_ptr+m)=*(z+m);
printf( " restored stack\n" ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
free(z);
}
void sub1()
{
float i ;
short a ;
int x[20] ;
spray_paint( (char *) &i, sizeof(i), 0xe1, "sub1.i" ) ;
spray_paint( (char *) &a, sizeof(a), 0xe2, "sub1.a" ) ;
spray_paint( (char *) &x, sizeof(x), 0xe3, "sub1.x" ) ;
sub2() ;
}
void sub2()
{
int i ;
char* a ;
char x[20] ;
spray_paint( (char *) &i, sizeof(i), 0xf1, "sub2.i" ) ;
spray_paint( (char *) &a, sizeof(a), 0xf2, "sub2.a" ) ;
spray_paint( (char *) &x, sizeof(x), 0xf3, "sub2.x" ) ;
printf ( "Min= %p Max= %p\n", min_ptr, max_ptr ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
//
// save/destroy the stack here (don't forget to use an external save area)
//
char *temp2=min_ptr;
char * temp=min_ptr;
////////save
int space=(int)(max_ptr-min_ptr);
char j[space];
int count=0;
do
{
j[count]=*temp2;
temp2++;
count++;
}while(temp2<=max_ptr);
///overwrites
do
{
*temp=1;
temp++;
}while(temp<=max_ptr);
printf( " destroyed stack\n" ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
//
// restore the stack here
//
char *temp_min=min_ptr;
char *temp_max=max_ptr;
count=0;
do
{
*temp_min=j[count];
temp_min++;
count++;
}while(temp_min<=temp_max);
printf( " restored stack\n" ) ;
dumper( min_ptr,(int) (max_ptr-min_ptr)/16+1 ) ;
}
