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85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* POSIX.1 sigaction call for Linux/SPARC.
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Copyright (C) 1997-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Miguel de Icaza <miguel@nuclecu.unam.mx>, 1997.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <syscall.h>
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#include <sys/signal.h>
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#include <errno.h>
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#include <kernel_sigaction.h>
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#include <sysdep.h>
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static void __rt_sigreturn_stub (void);
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static void __sigreturn_stub (void);
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int
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__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
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{
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struct kernel_sigaction kact, koact;
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unsigned long stub = 0;
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int ret;
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if (act)
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{
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kact.k_sa_handler = act->sa_handler;
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memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
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if (((kact.sa_flags = act->sa_flags) & SA_SIGINFO) != 0)
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stub = (unsigned long) &__rt_sigreturn_stub;
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else
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stub = (unsigned long) &__sigreturn_stub;
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stub -= 8;
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kact.sa_restorer = NULL;
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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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ret = INLINE_SYSCALL (rt_sigaction, 5, sig, act ? &kact : 0,
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oact ? &koact : 0, stub, _NSIG / 8);
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if (oact && ret >= 0)
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{
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oact->sa_handler = koact.k_sa_handler;
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memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
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oact->sa_flags = koact.sa_flags;
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oact->sa_restorer = koact.sa_restorer;
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}
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return ret;
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}
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libc_hidden_def (__libc_sigaction)
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#include <nptl/sigaction.c>
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static void
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__rt_sigreturn_stub (void)
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{
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__asm__ ("mov %0, %%g1\n\t"
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"ta 0x10\n\t"
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: /* no outputs */
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: "i" (__NR_rt_sigreturn));
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}
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static void
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__sigreturn_stub (void)
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{
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__asm__ ("mov %0, %%g1\n\t"
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"ta 0x10\n\t"
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: /* no outputs */
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: "i" (__NR_sigreturn));
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}
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