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glibc  2.9
fe_mask.c
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00001 /* Procedure definition for FE_MASK_ENV for Linux/ppc64.
00002    Copyright (C) 2007 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <fenv.h>
00021 #include <errno.h>
00022 #include <sysdep.h>
00023 #include <sys/syscall.h>
00024 #include <sys/prctl.h>
00025 #include <kernel-features.h>
00026 
00027 const fenv_t *
00028 __fe_mask_env (void)
00029 {
00030 #if defined PR_SET_FPEXC && defined PR_FP_EXC_DISABLED
00031   int result;
00032   INTERNAL_SYSCALL_DECL (err);
00033   result = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, PR_FP_EXC_DISABLED);
00034 # ifndef __ASSUME_NEW_PRCTL_SYSCALL
00035   if (INTERNAL_SYSCALL_ERROR_P (result, err)
00036       && INTERNAL_SYSCALL_ERRNO (result, err) == EINVAL)
00037     __set_errno (ENOSYS);
00038 # endif
00039 #else
00040   __set_errno (ENOSYS);
00041 #endif
00042   return FE_DFL_ENV;
00043 }