osfmk/man/task_get_emulation_vector.html

   1 <h2>task_get_emulation_vector</h2>
   2 <hr>
   3 <p>
   4 <strong>Function</strong> - Return an array identifying the target task's user-level system call handlers.
   5 <h3>SYNOPSIS</h3>
   6 <pre>
   7 <strong>kern_return_t   task_get_emulation_vector</strong>
   8                 <strong>(task_t</strong>                                    <var>task</var>,
   9                  <strong>int</strong>                               <var>vector_start</var>,
  10                  <strong>emulation_vector_t</strong>            <var>emulation_vector</var>,
  11                  <strong>mach_msg_type_number_t*</strong> <var>emulation_vector_count</var><strong>);</strong>
  12 </pre>
  13 <h3>PARAMETERS</h3>
  14 <dl>
  15 <p>
  16 <dt> <var>task</var>
  17 <dd>
  18 [in task send right]
  19 The port for the task for which the system call
  20 handler addresses are desired.
  21 <p>
  22 <dt> <var>vector_start</var>
  23 <dd>
  24 [out scalar]
  25 The syscall number corresponding to the first element of
  26 <var>emulation_vector</var>.
  27 <p>
  28 <dt> <var>emulation_vector</var>
  29 <dd>
  30 [out pointer to dynamic array of <strong>vm_address_t</strong>]
  31 Pointer to the returned
  32 array of routine entrypoints for the system calls starting with syscall
  33 number <var>vector_start</var>.
  34 <p>
  35 <dt> <var>emulation_vector_count</var>
  36 <dd>
  37 [out scalar]
  38 The number of entries filled by the kernel.
  39 </dl>
  40 <h3>DESCRIPTION</h3>
  41 <p>
  42 The <strong>task_get_emulation_vector</strong> function returns the
  43 user-level syscall handler entrypoint addresses.
  44 <h3>NOTES</h3>
  45 <p>
  46 This interface is machine word length specific because of the
  47 virtual addresses in the <var>emulation_vector</var> parameter.
  48 <h3>RETURN VALUES</h3>
  49 <p>
  50 Only generic errors apply.
  51 <h3>RELATED INFORMATION</h3>
  52 <p>
  53 Functions:
  54 <a href="task_set_emulation_vector.html"><strong>task_set_emulation_vector</strong></a>.