diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/sigaction.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/sigaction.c b/sysdeps/unix/sysv/linux/mips/sigaction.c new file mode 100644 index 0000000000..36265d1891 --- /dev/null +++ b/sysdeps/unix/sysv/linux/mips/sigaction.c @@ -0,0 +1,139 @@ +/* Copyright (C) 1997, 1998, 1999, 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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> + +#if __ASSUME_REALTIME_SIGNALS == 0 +/* The variable is shared between all wrappers around signal handling + functions which have RT equivalents. This is the definition. */ +int __libc_missing_rt_sigs; + +extern int __syscall_sigaction (int, const struct old_kernel_sigaction *__unbounded, + struct old_kernel_sigaction *__unbounded); +#endif +extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *__unbounded, + struct kernel_sigaction *__unbounded, size_t); + + +/* 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; +{ +#if __ASSUME_REALTIME_SIGNALS == 0 + struct old_kernel_sigaction k_sigact, k_osigact; +#endif + int result; + +#if defined __NR_rt_sigaction || __ASSUME_REALTIME_SIGNALS > 0 + /* First try the RT signals. */ +# if __ASSUME_REALTIME_SIGNALS == 0 + if (!__libc_missing_rt_sigs) +# endif + { + struct kernel_sigaction kact, koact; + /* Save the current error value for later. We need not do this + if we are guaranteed to have realtime signals. */ +# if __ASSUME_REALTIME_SIGNALS == 0 + int saved_errno = errno; +# endif + + if (act) + { + kact.k_sa_handler = act->sa_handler; + memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kernel_sigset_t)); + kact.sa_flags = act->sa_flags; +# ifdef HAVE_SA_RESTORER + kact.sa_restorer = act->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, + sizeof (kernel_sigset_t)); + +# if __ASSUME_REALTIME_SIGNALS == 0 + 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 (kernel_sigset_t)); + oact->sa_flags = koact.sa_flags; +# ifdef HAVE_SA_RESTORER + oact->sa_restorer = koact.sa_restorer; +# endif + } + return result; + } + +# if __ASSUME_REALTIME_SIGNALS == 0 + __set_errno (saved_errno); + __libc_missing_rt_sigs = 1; +# endif + } +#endif + +#if __ASSUME_REALTIME_SIGNALS == 0 + 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 + k_sigact.sa_restorer = act->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 +} + +weak_alias (__libc_sigaction, __sigaction) +weak_alias (__libc_sigaction, sigaction) |