wow.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>

int rb_new_obj() {
  printf("hi\n");
  exit(1);
}

void test() {
  int i = 10;
  int j = i * j;
  printf("%d\n", sizeof(i));
  return;
}


static void *blah = &rb_new_obj;

//void Init_memprof()
void main()
{
  char assembly[] = { "\xff\x14\x25\x90\x90\x90\x90\x90\x90\x90\x90"};

  int i = 0;
  int x = 0;

  for (; i < sizeof(long); i++) {
    assembly[i+3] = ((long)&blah >> i*8) & 0xff;
  }

  printf("blah: %p\n", &blah);

  for(i = 0; i < sizeof(long) + 1; i++) {
    printf("k: %x\n", assembly[i]);
  }

  printf("norm: %p, page: %p\n", test, (void*)(((long)&test)&(0xffffffffffff0000)));
  if (mprotect((void*)(((long)&test)&(0xffffffffffff0000)), 11, PROT_WRITE|PROT_READ|PROT_EXEC) == -1)
    perror("asdasdsa\n");

  memcpy(test, assembly, 11);
  mprotect((void*)(((long)&test)& (~(0x1 << 4))), 11, PROT_READ|PROT_EXEC);
  test();
  return;
}