Back to index

glibc  2.9
td_thr_getfpregs.c
Go to the documentation of this file.
00001 /* Get a thread's floating-point register set.
00002    Copyright (C) 1999, 2001, 2003 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.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_getfpregs (const td_thrhandle_t *th, prfpregset_t *regset)
00026 {
00027   struct _pthread_descr_struct pds;
00028 
00029   LOG ("td_thr_getfpregs");
00030 
00031   if (th->th_unique == NULL)
00032     {
00033       /* No data yet.  Use the main thread.  */
00034       pid_t pid = ps_getpid (th->th_ta_p->ph);
00035       if (ps_lgetfpregs (th->th_ta_p->ph, pid, regset) != PS_OK)
00036        return TD_ERR;
00037       return TD_OK;
00038     }
00039 
00040   /* We have to get the state and the PID for this thread.  */
00041   if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
00042                sizeof (struct _pthread_descr_struct)) != PS_OK)
00043     return TD_ERR;
00044 
00045   /* If the thread already terminated we return all zeroes.  */
00046   if (pds.p_terminated)
00047     memset (regset, '\0', sizeof (*regset));
00048   /* Otherwise get the register content through the callback.  */
00049   else
00050     {
00051       pid_t pid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph);
00052 
00053       if (ps_lgetfpregs (th->th_ta_p->ph, pid, regset) != PS_OK)
00054        return TD_ERR;
00055     }
00056 
00057   return TD_OK;
00058 }