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diff --git a/libc/sysdeps/linux/sparc64/bits/sigaction.h b/libc/sysdeps/linux/sparc64/bits/sigaction.h
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+/* The proper definitions for Linux/SPARC sigaction.
+ Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+ 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/>. */
+
+#ifndef _SIGNAL_H
+# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
+#endif
+
+/* Structure describing the action to be taken when a signal arrives. */
+struct sigaction
+ {
+ /* Signal handler. */
+#ifdef __USE_POSIX199309
+ union
+ {
+ /* Used if SA_SIGINFO is not set. */
+ __sighandler_t sa_handler;
+ /* Used if SA_SIGINFO is set. */
+ void (*sa_sigaction) (int, siginfo_t *, void *);
+ }
+ __sigaction_handler;
+# define sa_handler __sigaction_handler.sa_handler
+# define sa_sigaction __sigaction_handler.sa_sigaction
+#else
+ __sighandler_t sa_handler;
+#endif
+
+ /* Additional set of signals to be blocked. */
+ __sigset_t sa_mask;
+
+ /* Special flags. */
+ int __glibc_reserved0;
+ int sa_flags;
+
+ /* Not used by Linux/Sparc yet. */
+ void (*sa_restorer) (void);
+ };
+
+
+/* Bits in `sa_flags'. */
+#define SA_NOCLDSTOP 0x00000008 /* Don't send SIGCHLD when children stop. */
+#define SA_NOCLDWAIT 0x00000100 /* Don't create zombie on child death. */
+#define SA_SIGINFO 0x00000200 /* Invoke signal-catching function with
+ three arguments instead of one. */
+#if defined __USE_UNIX98 || defined __USE_MISC
+# define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */
+#endif
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
+# define SA_RESTART 0x00000002 /* Restart syscall on signal return. */
+# define SA_INTERRUPT 0x00000010 /* Historical no-op. */
+# define SA_NOMASK 0x00000020 /* Don't automatically block the signal when
+ its handler is being executed. */
+# define SA_ONESHOT 0x00000004 /* Reset to SIG_DFL on entry to handler. */
+
+/* Some aliases for the SA_ constants. */
+# define SA_NODEFER SA_NOMASK
+# define SA_RESETHAND SA_ONESHOT
+# define SA_STACK SA_ONSTACK
+#endif
+
+/* Values for the HOW argument to `sigprocmask'. */
+#define SIG_BLOCK 1 /* Block signals. */
+#define SIG_UNBLOCK 2 /* Unblock signals. */
+#define SIG_SETMASK 4 /* Set the set of blocked signals. */