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/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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Totally hacked up for uClibc by Erik Andersen <andersen@codepoet.org>
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*/
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <sys/syscall.h>
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#include <bits/kernel_sigaction.h>
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#define SA_RESTORER 0x04000000
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extern void __default_sa_restorer(void);
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extern void __default_rt_sa_restorer(void);
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#if defined __NR_rt_sigaction
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/* If ACT is not NULL, change the action for SIG to *ACT.
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If OACT is not NULL, put the old action for SIG in *OACT. */
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int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
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{
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int result;
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struct kernel_sigaction kact, koact;
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if (act) {
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kact.k_sa_handler = act->sa_handler;
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memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask));
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kact.sa_flags = act->sa_flags;
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# ifdef HAVE_SA_RESTORER
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if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) {
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kact.sa_restorer = act->sa_restorer;
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} else {
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if (kact.sa_flags & SA_SIGINFO) {
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kact.sa_restorer = __default_rt_sa_restorer;
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} else {
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kact.sa_restorer = __default_sa_restorer;
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kact.sa_flags |= SA_RESTORER;
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}
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}
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# endif
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}
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/* XXX The size argument hopefully will have to be changed to the
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real size of the user-level sigset_t. */
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result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
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oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
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if (oact && result >= 0) {
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oact->sa_handler = koact.k_sa_handler;
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memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
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oact->sa_flags = koact.sa_flags;
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# ifdef HAVE_SA_RESTORER
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oact->sa_restorer = koact.sa_restorer;
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# endif
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}
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return result;
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}
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#else
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/* If ACT is not NULL, change the action for SIG to *ACT.
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If OACT is not NULL, put the old action for SIG in *OACT. */
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int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
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{
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int result;
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struct old_kernel_sigaction kact, koact;
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if (act) {
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kact.k_sa_handler = act->sa_handler;
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kact.sa_mask = act->sa_mask.__val[0];
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kact.sa_flags = act->sa_flags;
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# ifdef HAVE_SA_RESTORER
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/* See the comments above for why we test SA_ONSTACK. */
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if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) {
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kact.sa_restorer = act->sa_restorer;
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} else {
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kact.sa_restorer = __default_sa_restorer;
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kact.sa_flags |= SA_RESTORER;
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}
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# endif
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}
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result = __syscall_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
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oact ? __ptrvalue (&koact) : NULL);
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if (oact && result >= 0) {
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oact->sa_handler = koact.k_sa_handler;
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oact->sa_mask.__val[0] = koact.sa_mask;
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oact->sa_flags = koact.sa_flags;
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# ifdef HAVE_SA_RESTORER
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oact->sa_restorer = koact.sa_restorer;
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# endif
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}
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return result;
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}
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#endif
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weak_alias(__libc_sigaction, sigaction)
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