/* Copyright (C) 1997,1998,1999,2000,2002,2003 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, 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); extern __typeof(sigaction) __libc_sigaction; /* When RT signals are in use we need to use a different return stub. */ #ifdef __NR_rt_sigreturn #define choose_restorer(flags) \ (flags & SA_SIGINFO) ? __default_rt_sa_restorer \ : __default_sa_restorer #else #define choose_restorer(flags) \ __default_sa_restorer #endif #ifdef __NR_rt_sigaction /* Experimentally off - libc_hidden_proto(memcpy) */ /* 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 (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 = __syscall_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 (sigset_t)); 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 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 } result = __syscall_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 #ifndef LIBC_SIGACTION /* libc_hidden_proto(sigaction) */ weak_alias(__libc_sigaction,sigaction) libc_hidden_weak(sigaction) #endif