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1 /* Note a change to floating-point exceptions.
2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
19 #include <fenv_libc.h>
21 #include <sys/prctl.h>
23 /* Inform the kernel of a change to floating-point exceptions. */
26 __fe_note_change (void)
29 INTERNAL_SYSCALL_DECL (err
);
31 r
= INTERNAL_SYSCALL (prctl
, err
, 2, PR_GET_FPEXC
, &pflags
);
32 if (INTERNAL_SYSCALL_ERROR_P (r
, err
))
34 if ((pflags
& PR_FP_EXC_SW_ENABLE
) == 0)
35 INTERNAL_SYSCALL (prctl
, err
, 2, PR_SET_FPEXC
,
36 pflags
| PR_FP_EXC_SW_ENABLE
);
39 libm_hidden_def (__fe_note_change
)