[Xen-devel] Get the pid of a process from hypervisor

[Carlo Maiero <zesster@xxxxxxxxx>]

Hi,

how can i get the pid of a systemcall from do_guest_trap in traps.c?

I tried with this code put in do_guest_trap:

   uint32_t pid;

   uint32_t thread_info_address;

   uint32_t task_struct_addr;

   int pid_offset=268; // i got this number using the module in xenaccess

  unsigned_long *tmp;

 

//I start getting the address of the thread:

   thread_info_address= v->arch.guest_context.kernel_sp & 0xFFFFE000;

//then i get the struct of the task

   tmp=(unsigned long*)(thread_info_addr);

   get_user(task_struct_addr,tmp);

//finally i get pid:

  tmp =(unsigned long*)(task_struct_addr + pid_offset);

  get_user(pid,tmp);

  printk("pid %d",pid);

What is wrong in the code?

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