2013-10-18 21:03:40 +00:00
|
|
|
/* Note a change to floating-point exceptions.
|
2017-01-01 00:14:16 +00:00
|
|
|
Copyright (C) 2013-2017 Free Software Foundation, Inc.
|
2013-10-18 21:03:40 +00:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
|
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
|
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
|
Lesser General Public License for more details.
|
|
|
|
|
|
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
#include <sys/prctl.h>
|
|
|
|
|
|
|
|
|
|
/* Inform the kernel of a change to floating-point exceptions. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
__fe_note_change (void)
|
|
|
|
|
{
|
|
|
|
|
int pflags, r;
|
|
|
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
|
|
|
|
|
|
|
|
r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
|
|
|
|
|
if (INTERNAL_SYSCALL_ERROR_P (r, err))
|
|
|
|
|
return;
|
|
|
|
|
if ((pflags & PR_FP_EXC_SW_ENABLE) == 0)
|
|
|
|
|
INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
|
|
|
|
|
pflags | PR_FP_EXC_SW_ENABLE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
libm_hidden_def (__fe_note_change)
|
