kernel/system/do_profbuf.c

   1 /* The kernel call that is implemented in this file:
   2  *   m_type:    SYS_PROFBUF
   3  *
   4  * The parameters for this kernel call are:
   5  *    m7_p1:    PROF_CTL_PTR      (location of control struct)
   6  *    m7_p2:    PROF_MEM_PTR      (location of profiling table)
   7  *
   8  * Changes:
   9  *   14 Aug, 2006   Created (Rogier Meurs)
  10  */
  11
  12 #include "../system.h"
  13
  14 #if CPROFILE
  15
  16 /*===========================================================================*
  17  *                              do_profbuf                                   *
  18  *===========================================================================*/
  19 PUBLIC int do_profbuf(m_ptr)
  20 register message *m_ptr;    /* pointer to request message */
  21 {
  22 /* This kernel call is used by profiled system processes when Call
  23  * Profiling is enabled. It is called on the first execution of procentry.
  24  * By means of this kernel call, the profiled processes inform the kernel
  25  * about the location of their profiling table and the control structure
  26  * which is used to enable the kernel to have the tables cleared.
  27  */
  28   int proc_nr, len;
  29   vir_bytes vir_dst;
  30   struct proc *rp;
  31
  32   /* Store process name, control struct, table locations. */
  33   isokendpt(m_ptr->m_source, &proc_nr);
  34   rp = proc_addr(proc_nr);
  35
  36   cprof_proc_info[cprof_procs_no].endpt = who_e;
  37   cprof_proc_info[cprof_procs_no].name = rp->p_name;
  38
  39   len = (phys_bytes) sizeof (void *);
  40
  41   vir_dst = (vir_bytes) m_ptr->PROF_CTL_PTR;
  42   cprof_proc_info[cprof_procs_no].ctl =
  43           numap_local(proc_nr, vir_dst, len);
  44
  45   vir_dst = (vir_bytes) m_ptr->PROF_MEM_PTR;
  46   cprof_proc_info[cprof_procs_no].buf =
  47           numap_local(proc_nr, vir_dst, len);
  48
  49   cprof_procs_no++;
  50
  51   return OK;
  52 }
  53
  54 #endif /* CPROFILE */
  55