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/* Note a change to floating-point exceptions.
Copyright (C) 2013-2019 Free Software Foundation, Inc.
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)
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