]>
Commit | Line | Data |
---|---|---|
3c8325fb | 1 | /* Note a change to floating-point exceptions. |
688903eb | 2 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
3c8325fb JM |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <fenv_libc.h> | |
20 | #include <sysdep.h> | |
21 | #include <sys/prctl.h> | |
22 | ||
23 | /* Inform the kernel of a change to floating-point exceptions. */ | |
24 | ||
25 | void | |
26 | __fe_note_change (void) | |
27 | { | |
28 | int pflags, r; | |
29 | INTERNAL_SYSCALL_DECL (err); | |
30 | ||
31 | r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); | |
32 | if (INTERNAL_SYSCALL_ERROR_P (r, err)) | |
33 | return; | |
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); | |
37 | } | |
38 | ||
39 | libm_hidden_def (__fe_note_change) |