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 "kernel/system.h"
  13
  14 #if CPROFILE
  15
  16 /*===========================================================================*
  17  *                              do_profbuf                                   *
  18  *===========================================================================*/
  19 int do_profbuf(struct proc * caller, message * m_ptr)
  20 {
  21 /* This kernel call is used by profiled system processes when Call
  22  * Profiling is enabled. It is called on the first execution of procentry.
  23  * By means of this kernel call, the profiled processes inform the kernel
  24  * about the location of their profiling table and the control structure
  25  * which is used to enable the kernel to have the tables cleared.
  26  */
  27   int proc_nr;
  28   struct proc *rp;
  29
  30   /* Store process name, control struct, table locations. */
  31   if(!isokendpt(caller->p_endpoint, &proc_nr))
  32         return EDEADSRCDST;
  33
  34   if(cprof_procs_no >= NR_SYS_PROCS)
  35         return ENOSPC;
  36
  37   rp = proc_addr(proc_nr);
  38
  39   cprof_proc_info[cprof_procs_no].endpt = caller->p_endpoint;
  40   cprof_proc_info[cprof_procs_no].name = rp->p_name;
  41
  42   cprof_proc_info[cprof_procs_no].ctl_v = (vir_bytes) m_ptr->PROF_CTL_PTR;
  43   cprof_proc_info[cprof_procs_no].buf_v = (vir_bytes) m_ptr->PROF_MEM_PTR;
  44
  45   cprof_procs_no++;
  46
  47   return OK;
  48 }
  49
  50 #endif /* CPROFILE */
  51