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/* 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.
Totally hacked up for uClibc by Erik Andersen <andersen@codepoet.org>
*/
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <sys/syscall.h>
#include <bits/kernel_sigaction.h>
#define SA_RESTORER 0x04000000
extern void __default_sa_restorer(void);
extern void __default_rt_sa_restorer(void);
#if defined __NR_rt_sigaction
/* 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 (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 (kact.sa_mask));
kact.sa_flags = act->sa_flags;
# ifdef HAVE_SA_RESTORER
if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) {
kact.sa_restorer = act->sa_restorer;
} else {
if (kact.sa_flags & SA_SIGINFO) {
kact.sa_restorer = __default_rt_sa_restorer;
} else {
kact.sa_restorer = __default_sa_restorer;
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 = __rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
if (oact && result >= 0) {
oact->sa_handler = koact.k_sa_handler;
memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
oact->sa_flags = koact.sa_flags;
# ifdef HAVE_SA_RESTORER
oact->sa_restorer = koact.sa_restorer;
# endif
}
return result;
}
#else
/* 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 (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct old_kernel_sigaction kact, koact;
if (act) {
kact.k_sa_handler = act->sa_handler;
kact.sa_mask = act->sa_mask.__val[0];
kact.sa_flags = act->sa_flags;
# ifdef HAVE_SA_RESTORER
/* See the comments above for why we test SA_ONSTACK. */
if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) {
kact.sa_restorer = act->sa_restorer;
} else {
kact.sa_restorer = __default_sa_restorer;
kact.sa_flags |= SA_RESTORER;
}
# endif
}
result = __sigaction(sig, act ? __ptrvalue (&kact) : NULL,
oact ? __ptrvalue (&koact) : NULL);
if (oact && result >= 0) {
oact->sa_handler = koact.k_sa_handler;
oact->sa_mask.__val[0] = koact.sa_mask;
oact->sa_flags = koact.sa_flags;
# ifdef HAVE_SA_RESTORER
oact->sa_restorer = koact.sa_restorer;
# endif
}
return result;
}
#endif
weak_alias(__libc_sigaction, sigaction)
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