1 /* Get a thread's floating-point register set.
2 Copyright (C) 1999-2022 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
td_thr_getfpregs(const td_thrhandle_t * th,prfpregset_t * regset)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 }
57