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