1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677 |
- /* POSIX.1 sigaction call for Linux/SPARC64.
- Copyright (C) 1997-2017 Free Software Foundation, Inc.
- Contributed by Miguel de Icaza <miguel@nuclecu.unam.mx> and
- Jakub Jelinek <jj@ultra.linux.cz>.
- 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, see
- <http://www.gnu.org/licenses/>. */
- #include <string.h>
- #include <syscall.h>
- #include <sysdep.h>
- #include <sys/signal.h>
- #include <errno.h>
- #include <bits/kernel_sigaction.h>
- /* SPARC 64bit userland requires a kernel that has rt signals anyway. */
- static void __rt_sigreturn_stub (void);
- int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
- {
- int ret;
- struct kernel_sigaction kact, koact;
- unsigned long stub = ((unsigned long) &__rt_sigreturn_stub) - 8;
- 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;
- 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 = INLINE_SYSCALL (rt_sigaction, 5, sig,
- act ? &kact : 0,
- oact ? &koact : 0, stub, _NSIG / 8);
- 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;
- }
- #ifndef LIBC_SIGACTION
- # ifndef __UCLIBC_HAS_THREADS__
- strong_alias(__libc_sigaction,sigaction)
- libc_hidden_def(sigaction)
- # else
- weak_alias(__libc_sigaction,sigaction)
- libc_hidden_weak(sigaction)
- # endif
- #endif
- static void
- __rt_sigreturn_stub (void)
- {
- __asm__ ("mov %0, %%g1\n\t"
- "ta 0x6d\n\t"
- : /* no outputs */
- : "i" (__NR_rt_sigreturn));
- }
|