1  /* Get a thread's floating-point register set.
       2     Copyright (C) 1999-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include "thread_dbP.h"
      20  
      21  
      22  td_err_e
      23  td_thr_getfpregs (const td_thrhandle_t *th, prfpregset_t *regset)
      24  {
      25    psaddr_t cancelhandling, tid;
      26    td_err_e err;
      27  
      28    LOG ("td_thr_getfpregs");
      29  
      30    if (th->th_unique == 0)
      31      /* Special case for the main thread before initialization.  */
      32      return ps_lgetfpregs (th->th_ta_p->ph, ps_getpid (th->th_ta_p->ph),
      33  			  regset) != PS_OK ? TD_ERR : TD_OK;
      34  
      35    /* We have to get the state and the PID for this thread.  */
      36    err = DB_GET_FIELD (cancelhandling, th->th_ta_p, th->th_unique, pthread,
      37  		      cancelhandling, 0);
      38    if (err != TD_OK)
      39      return err;
      40  
      41    /* If the thread already terminated we return all zeroes.  */
      42    if (((int) (uintptr_t) cancelhandling) & TERMINATED_BITMASK)
      43      memset (regset, '\0', sizeof (*regset));
      44    /* Otherwise get the register content through the callback.  */
      45    else
      46      {
      47        err = DB_GET_FIELD (tid, th->th_ta_p, th->th_unique, pthread, tid, 0);
      48        if (err != TD_OK)
      49  	return err;
      50  
      51        if (ps_lgetfpregs (th->th_ta_p->ph, (uintptr_t) tid, regset) != PS_OK)
      52  	return TD_ERR;
      53      }
      54  
      55    return TD_OK;
      56  }