vm_write

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <mach/mach.h>



int write32(vm_address_t offset, unsigned int data) {

  data = CFSwapInt32(data);

  kern_return_t err;

  mach_port_t port = mach_task_self();

  err = vm_protect(port, (vm_address_t) offset, sizeof(data), NO,

                   VM_PROT_READ | VM_PROT_WRITE | VM_PROT_COPY);

  if (err != KERN_SUCCESS) {

    NSLog(@"prot error: %s \n", mach_error_string(err));

    return 0;

  }



  vm_write(port, (vm_address_t) offset, (vm_address_t) & data, sizeof(data));

  err = vm_protect(port, (vm_address_t) offset, sizeof(data), NO,

                   VM_PROT_READ | VM_PROT_EXECUTE);

  if (err != KERN_SUCCESS) {

    NSLog(@"prot error: %s \n", mach_error_string(err));

    return 0;

  }



  NSLog(@"all is well here shipmate");

  return 1;

}



int write16(vm_address_t offset, unsigned short data) {

  data = CFSwapInt16(data);

  kern_return_t err;

  mach_port_t port = mach_task_self();

  err = vm_protect(port, (vm_address_t) offset, sizeof(data), NO,

                   VM_PROT_READ | VM_PROT_WRITE | VM_PROT_COPY);



  if (err != KERN_SUCCESS) {

    NSLog(@"prot error: %s \n", mach_error_string(err));

    return 0;

  }



  vm_write(port, (vm_address_t) offset, (vm_address_t) & data, sizeof(data));

  err = vm_protect(port, (vm_address_t) offset, sizeof(data), NO,

                   VM_PROT_READ | VM_PROT_EXECUTE);

  if (err != KERN_SUCCESS) {

    NSLog(@"prot error: %s \n", mach_error_string(err));

    return 0;

  }



  NSLog(@"all is well here shipmate");

  return 1;

}



bool getType(unsigned int x) {

  int a = x & 0xffff8000;

  int b = a + 0x00008000;

  int c = b & 0xffff7fff;



  return c; //true = 32bit false = 16bit

}



int writeData(vm_address_t offset, unsigned int data) {

  if (getType(data)) {

    write32(offset, data);

  } else {

    write16(offset, (unsigned short) data);

  }



  return 0;

}