diff options
Diffstat (limited to 'libc/sysdeps/linux/sparc/sigaction.c')
| -rw-r--r-- | libc/sysdeps/linux/sparc/sigaction.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc/sigaction.c b/libc/sysdeps/linux/sparc/sigaction.c new file mode 100644 index 000000000..9dee63b6c --- /dev/null +++ b/libc/sysdeps/linux/sparc/sigaction.c @@ -0,0 +1,94 @@ +/* POSIX.1 sigaction call for Linux/SPARC. + Copyright (C) 1997-2000,2002,2003,2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx), 1997. + + 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. + + Ported to uClibc from glibc: 090520: + Jan Buchholz, KIP, Uni Heidelberg <jan.buchholz@kip.uni-heidelberg.de> + Austin Foxley, Ceton Corporation <austinf@cetoncorp.com> +*/ + +#include <errno.h> +#include <signal.h> +#include <string.h> +#include <sys/syscall.h> +#include <bits/kernel_sigaction.h> + + +_syscall5(int, rt_sigaction, int, a, int, b, int, c, int, d, int, e); +static void __rt_sigreturn_stub (void); +static void __sigreturn_stub (void); + +int +__libc_sigaction (int sig, __const struct sigaction *act, struct sigaction *oact) +{ + int ret; + struct old_kernel_sigaction kact, koact; + unsigned long stub = 0; + int saved_errno = errno; + + if (act) + { + kact.k_sa_handler = act->sa_handler; + memcpy (&kact.sa_mask, &act->sa_mask, sizeof(sigset_t)); + if (((kact.sa_flags = act->sa_flags) & SA_SIGINFO)!= 0) + stub = (unsigned long) &__rt_sigreturn_stub; + else + stub = (unsigned long) &__sigreturn_stub; + stub -= 8; + kact.sa_restorer = NULL; + } + /* XXX The size argument hopefully will have to be changed to the real size of the user-level sigset_t. */ + ret = rt_sigaction(sig, act ? &kact : NULL, oact ? &koact : NULL, stub, _NSIG / 8); + + if (ret >= 0 || errno != ENOSYS) + { + if (oact && ret >= 0) + { + oact->sa_handler = koact.k_sa_handler; + memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); + oact->sa_flags = koact.sa_flags; + oact->sa_restorer = koact.sa_restorer; + } + return ret; + } + __set_errno (saved_errno); + return -1; +} + +#ifndef LIBC_SIGACTION +weak_alias(__libc_sigaction,sigaction) +libc_hidden_weak(sigaction) +#endif + +static void +__rt_sigreturn_stub (void) +{ + __asm__ ("mov %0, %%g1\n\t" + "ta 0x10\n\t" + : /* no outputs */ + : "i" (__NR_rt_sigreturn)); +} +static void +__sigreturn_stub (void) +{ + __asm__ ("mov %0, %%g1\n\t" + "ta 0x10\n\t" + : /* no outputs */ + : "i" (__NR_sigreturn)); +} |