sparc64: add basic support

No NPTL, no LDSO support.
Bootup with Busybox Ash in Qemu working.
Testuite shows only two failures, but mksh continue/break
support doesn't work.

1 files changed, 77 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc64/sigaction.c b/libc/sysdeps/linux/sparc64/sigaction.c
new file mode 100644
index 000000000..d8aaad0fb
--- /dev/null
+++ b/libc/sysdeps/linux/sparc64/sigaction.c
@@ -0,0 +1,77 @@
+/* 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));
+}