diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/sigaction.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/sigaction.c b/sysdeps/unix/sysv/linux/arm/sigaction.c new file mode 100644 index 0000000000..21df885a7a --- /dev/null +++ b/sysdeps/unix/sysv/linux/arm/sigaction.c @@ -0,0 +1,110 @@ +/* Copyright (C) 1997-2014 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, see + <http://www.gnu.org/licenses/>. */ + +#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> + +#define SA_RESTORER 0x04000000 + +extern void __default_sa_restorer_v1(void); +extern void __default_sa_restorer_v2(void); +extern void __default_rt_sa_restorer_v1(void); +extern void __default_rt_sa_restorer_v2(void); +#ifdef __ASSUME_SIGFRAME_V2 +# define __default_sa_restorer __default_sa_restorer_v2 +# define __default_rt_sa_restorer __default_rt_sa_restorer_v2 +#else +# include <ldsodefs.h> +# define __default_sa_restorer (GLRO(dl_osversion) >= 0x020612 \ + ? __default_sa_restorer_v2 \ + : __default_sa_restorer_v1) +# define __default_rt_sa_restorer (GLRO(dl_osversion) >= 0x020612 \ + ? __default_rt_sa_restorer_v2 \ + : __default_rt_sa_restorer_v1) +#endif + +/* When RT signals are in use we need to use a different return stub. */ +#define choose_restorer(flags) \ + (flags & SA_SIGINFO) ? __default_rt_sa_restorer \ + : __default_sa_restorer + +/* 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; +{ + int result; + + struct kernel_sigaction kact, koact; + + 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 (kact.sa_flags & SA_RESTORER) + 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 ? &kact : NULL, + oact ? &koact : NULL, _NSIG / 8); + + 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; +} +libc_hidden_def (__libc_sigaction) + +#ifdef WRAPPER_INCLUDE +# include WRAPPER_INCLUDE +#endif + +#ifndef LIBC_SIGACTION +weak_alias (__libc_sigaction, __sigaction) +libc_hidden_weak (__sigaction) +weak_alias (__libc_sigaction, sigaction) +#endif |