1 /* POSIX.1 sigaction call for Linux/SPARC.
2 Copyright (C) 1997-2000,2002,2003,2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx), 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 Ported to uClibc from glibc: 090520:
22 Jan Buchholz, KIP, Uni Heidelberg <jan.buchholz@kip.uni-heidelberg.de>
23 Austin Foxley, Ceton Corporation <austinf@cetoncorp.com>
29 #include <sys/syscall.h>
30 #include <bits/kernel_sigaction.h>
33 _syscall5(int, rt_sigaction, int, a, int, b, int, c, int, d, int, e);
34 static void __rt_sigreturn_stub(void);
35 static void __sigreturn_stub(void);
37 int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
40 struct old_kernel_sigaction kact, koact;
41 unsigned long stub = 0;
42 int saved_errno = errno;
45 kact.k_sa_handler = act->sa_handler;
46 // BUG?! kact.sa_mask is a long, but sigset_t is a vector
47 // of longs and it may be bigger (in glibc, it _is_ bigger).
48 // Should we do this instead?
49 // kact.sa_mask = act->sa_mask.__val[0];
50 memcpy(&kact.sa_mask, &act->sa_mask, sizeof(sigset_t));
51 kact.sa_flags = act->sa_flags;
52 if (kact.sa_flags & SA_SIGINFO)
53 stub = (unsigned long) &__rt_sigreturn_stub;
55 stub = (unsigned long) &__sigreturn_stub;
57 kact.sa_restorer = NULL;
59 /* NB: kernel (as of 2.6.25) will return EINVAL
60 * if _NSIG / 8 does not match kernel's sizeof(sigset_t) */
61 ret = rt_sigaction(sig,
62 (int)(act ? &kact : NULL),
63 (int)(oact ? &koact : NULL),
67 // BUG?! if ret == -1, we return -1 but do not set errno?!
68 if (ret >= 0 || errno != ENOSYS) {
69 if (oact && ret >= 0) {
70 oact->sa_handler = koact.k_sa_handler;
71 // maybe oact->sa_mask.__val[0] = koact.sa_mask; ?
72 memcpy(&oact->sa_mask, &koact.sa_mask, sizeof(sigset_t));
73 oact->sa_flags = koact.sa_flags;
74 oact->sa_restorer = koact.sa_restorer;
78 __set_errno(saved_errno);
82 #ifndef LIBC_SIGACTION
83 weak_alias(__libc_sigaction,sigaction)
84 libc_hidden_weak(sigaction)
88 __rt_sigreturn_stub(void)
94 : "i" (__NR_rt_sigreturn)
98 __sigreturn_stub(void)
104 : "i" (__NR_sigreturn)