diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/sigaction.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/sigaction.c b/sysdeps/unix/sysv/linux/arm/sigaction.c deleted file mode 100644 index 81b29adb2b..0000000000 --- a/sysdeps/unix/sysv/linux/arm/sigaction.c +++ /dev/null @@ -1,165 +0,0 @@ -/* Copyright (C) 1997,1998,1999,2000,2002,2003 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <signal.h> -#include <string.h> - -#include <sysdep.h> -#include <sys/syscall.h> -#include <kernel-features.h> - -/* The difference here is that the sigaction structure used in the - kernel is not the same as we use in the libc. Therefore we must - translate it here. */ -#include <kernel_sigaction.h> - -/* The variable is shared between all wrappers around signal handling - functions which have RT equivalents. */ -int __libc_missing_rt_sigs; - -#define SA_RESTORER 0x04000000 - -extern void __default_sa_restorer(void); -extern void __default_rt_sa_restorer(void); - -/* When RT signals are in use we need to use a different return stub. */ -#ifdef __NR_rt_sigreturn -#define choose_restorer(flags) \ - (flags & SA_SIGINFO) ? __default_rt_sa_restorer \ - : __default_sa_restorer -#else -#define choose_restorer(flags) \ - __default_sa_restorer -#endif - -/* If ACT is not NULL, change the action for SIG to *ACT. - If OACT is not NULL, put the old action for SIG in *OACT. */ -int -__libc_sigaction (sig, act, oact) - int sig; - const struct sigaction *act; - struct sigaction *oact; -{ -#ifndef __ASSUME_REALTIME_SIGNALS - struct old_kernel_sigaction k_sigact, k_osigact; -#endif - int result; - -#ifdef __NR_rt_sigaction - /* First try the RT signals. */ -# ifndef __ASSUME_REALTIME_SIGNALS - if (!__libc_missing_rt_sigs) -# endif - { - struct kernel_sigaction kact, koact; -# ifndef __ASSUME_REALTIME_SIGNALS - int saved_errno = errno; -# endif - - if (act) - { - kact.k_sa_handler = act->sa_handler; - memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); - kact.sa_flags = act->sa_flags; -# ifdef HAVE_SA_RESTORER - /* If the user specified SA_ONSTACK this means she is trying to - use the old-style stack switching. Unfortunately this - requires the sa_restorer field so we cannot install our own - handler. (In fact the user is likely to be out of luck anyway - since the kernel currently only supports stack switching via - the X/Open sigaltstack interface, but we allow for the - possibility that this might change in the future.) */ - if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) - kact.sa_restorer = act->sa_restorer; - else - { - kact.sa_restorer = choose_restorer (kact.sa_flags); - kact.sa_flags |= SA_RESTORER; - } -# endif - } - - /* XXX The size argument hopefully will have to be changed to the - real size of the user-level sigset_t. */ - result = INLINE_SYSCALL (rt_sigaction, 4, sig, - act ? __ptrvalue (&kact) : NULL, - oact ? __ptrvalue (&koact) : NULL, _NSIG / 8); - -# ifndef __ASSUME_REALTIME_SIGNALS - if (result >= 0 || errno != ENOSYS) -# endif - { - if (oact && result >= 0) - { - oact->sa_handler = koact.k_sa_handler; - memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); - oact->sa_flags = koact.sa_flags; -# ifdef HAVE_SA_RESTORER - oact->sa_restorer = koact.sa_restorer; -# endif - } - return result; - } - -# ifndef __ASSUME_REALTIME_SIGNALS - __set_errno (saved_errno); - __libc_missing_rt_sigs = 1; -# endif - } -#endif - -#ifndef __ASSUME_REALTIME_SIGNALS - if (act) - { - k_sigact.k_sa_handler = act->sa_handler; - k_sigact.sa_mask = act->sa_mask.__val[0]; - k_sigact.sa_flags = act->sa_flags; -# ifdef HAVE_SA_RESTORER - /* See the comments above for why we test SA_ONSTACK. */ - if (k_sigact.sa_flags & (SA_RESTORER | SA_ONSTACK)) - k_sigact.sa_restorer = act->sa_restorer; - else - { - k_sigact.sa_restorer = choose_restorer (k_sigact.sa_flags); - k_sigact.sa_flags |= SA_RESTORER; - } -# endif - } - result = INLINE_SYSCALL (sigaction, 3, sig, - act ? __ptrvalue (&k_sigact) : NULL, - oact ? __ptrvalue (&k_osigact) : NULL); - if (oact && result >= 0) - { - oact->sa_handler = k_osigact.k_sa_handler; - oact->sa_mask.__val[0] = k_osigact.sa_mask; - oact->sa_flags = k_osigact.sa_flags; -# ifdef HAVE_SA_RESTORER - oact->sa_restorer = k_osigact.sa_restorer; -# endif - } - return result; -#endif -} -libc_hidden_def (__libc_sigaction) - -#ifndef LIBC_SIGACTION -weak_alias (__libc_sigaction, __sigaction) -libc_hidden_weak (__sigaction) -weak_alias (__libc_sigaction, sigaction) -#endif |