/* Procedure definition for FE_MASK_ENV for Linux/ppc.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2016 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
#include <unistd.h>
#include <sysdep.h>
#include <sys/prctl.h>
-#include <kernel-features.h>
-
-#if __ASSUME_NEW_PRCTL_SYSCALL == 0
-/* This is rather fiddly under Linux. We don't have direct access,
- and there is no system call, but we can change the bits
- in a signal handler's context... */
-
-static struct sigaction oact;
-
-static void
-fe_mask_handler (int signum, struct sigcontext *sc)
-{
- sc->regs->msr &= ~0x900ul; /* FE0 | FE1 */
- sigaction (SIGUSR1, &oact, NULL);
-}
-#endif
const fenv_t *
__fe_mask_env (void)
{
-#if __ASSUME_NEW_PRCTL_SYSCALL == 0
-# if defined PR_SET_FPEXC && defined PR_FP_EXC_DISABLED
- int result = INLINE_SYSCALL (prctl, 2, PR_SET_FPEXC, PR_FP_EXC_DISABLED);
-
- if (result == -1 && errno == EINVAL)
-# endif
- {
- struct sigaction act;
-
- act.sa_handler = (sighandler_t) fe_mask_handler;
- sigemptyset (&act.sa_mask);
- act.sa_flags = 0;
-
- sigaction (SIGUSR1, &act, &oact);
- raise (SIGUSR1);
- }
-#else
INTERNAL_SYSCALL_DECL (err);
INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, PR_FP_EXC_DISABLED);
-#endif
return FE_DFL_ENV;
}