nptl_db/td_thr_getgregs.c

   1 /* Get a thread's general register set.
   2    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include "thread_dbP.h"
  22
  23
  24 td_err_e
  25 td_thr_getgregs (const td_thrhandle_t *th, prgregset_t gregs)
  26 {
  27   LOG ("td_thr_getgregs");
  28
  29   /* We have to get the state and the PID for this thread.  */
  30   int cancelhandling;
  31   if (ps_pdread (th->th_ta_p->ph,
  32                  &((struct pthread *) th->th_unique)->cancelhandling,
  33                  &cancelhandling, sizeof (int)) != PS_OK)
  34     return TD_ERR;
  35
  36   /* If the thread already terminated we return all zeroes.  */
  37   if (cancelhandling & TERMINATED_BIT)
  38     memset (gregs, '\0', sizeof (prgregset_t));
  39   /* Otherwise get the register content through the callback.  */
  40   else
  41     {
  42       pid_t tid;
  43
  44       if (ps_pdread (th->th_ta_p->ph,
  45                      &((struct pthread *) th->th_unique)->tid,
  46                      &tid, sizeof (pid_t)) != PS_OK
  47           || ps_lgetregs (th->th_ta_p->ph, tid, gregs) != PS_OK)
  48         return TD_ERR;
  49     }
  50
  51   return TD_OK;
  52 }