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glibc  2.9
td_thr_setgregs.c
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00001 /* Set a thread's general register set.
00002    Copyright (C) 1999, 2001, 2002, 2003, 2007 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include "thread_dbP.h"
00022 
00023 
00024 td_err_e
00025 td_thr_setgregs (const td_thrhandle_t *th, prgregset_t gregs)
00026 {
00027   psaddr_t cancelhandling, tid;
00028   td_err_e err;
00029 
00030   LOG ("td_thr_setgregs");
00031 
00032   if (th->th_unique == 0)
00033     /* Special case for the main thread before initialization.  */
00034     return ps_lsetregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
00035                      gregs) != PS_OK ? TD_ERR : TD_OK;
00036 
00037   /* We have to get the state and the PID for this thread.  */
00038   err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
00039                     cancelhandling, 0);
00040   if (err != TD_OK)
00041     return err;
00042 
00043   /* Only set the registers if the thread hasn't yet terminated.  */
00044   if ((((int) (uintptr_t) cancelhandling) & TERMINATED_BITMASK) == 0)
00045     {
00046       err = DB_GET_FIELD (tid, th->th_ta_p, th->th_unique, pthread, tid, 0);
00047       if (err != TD_OK)
00048        return err;
00049 
00050       if (ps_lsetregs (th->th_ta_p->ph, tid - (psaddr_t) 0, gregs) != PS_OK)
00051        return TD_ERR;
00052     }
00053 
00054   return TD_OK;
00055 }