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, 63 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc64/getcontext.S b/libc/sysdeps/linux/sparc64/getcontext.S
new file mode 100644
index 000000000..44b716d6a
--- /dev/null
+++ b/libc/sysdeps/linux/sparc64/getcontext.S
@@ -0,0 +1,63 @@
+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   Contributed by Richard Henderson (rth@tamu.edu).
+
+   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 <sysdep.h>
+#include "ucontext_i.h"
+
+/* int getcontext(ucontext_t *); */
+
+ENTRY(__getcontext)
+
+	ldx	[%o0 + UC_LINK], %o1	/* Preserve uc_link field, the
+					   trap clears it.  */
+	ta	0x6e
+1:
+	ldx	[%o0 + UC_M_PC], %o2
+	ldx	[%o0 + UC_M_NPC], %o3
+	ldx	[%o0 + __UC_SIGMASK], %o4
+	stx	%o1, [%o0 + UC_LINK]
+	add	%o2, 2f - 1b, %o2
+	stx	%o2, [%o0 + UC_M_PC]
+	add	%o3, 2f - 1b, %o3
+	stx	%o3, [%o0 + UC_M_NPC]
+#if SIGMASK_WORDS == 16
+	stx	%o4, [%o0 + UC_SIGMASK]
+	stx	%g0, [%o0 + UC_SIGMASK + 8]
+	stx	%g0, [%o0 + UC_SIGMASK + 16]
+	stx	%g0, [%o0 + UC_SIGMASK + 24]
+	stx	%g0, [%o0 + UC_SIGMASK + 32]
+	stx	%g0, [%o0 + UC_SIGMASK + 40]
+	stx	%g0, [%o0 + UC_SIGMASK + 48]
+	stx	%g0, [%o0 + UC_SIGMASK + 56]
+	stx	%g0, [%o0 + UC_SIGMASK + 64]
+	stx	%g0, [%o0 + UC_SIGMASK + 72]
+	stx	%g0, [%o0 + UC_SIGMASK + 80]
+	stx	%g0, [%o0 + UC_SIGMASK + 88]
+	stx	%g0, [%o0 + UC_SIGMASK + 96]
+	stx	%g0, [%o0 + UC_SIGMASK + 104]
+	stx	%g0, [%o0 + UC_SIGMASK + 112]
+	stx	%g0, [%o0 + UC_SIGMASK + 120]
+#else
+# error Adjust __getcontext
+#endif
+2:
+	retl
+	 clr	%o0
+
+END(__getcontext)
+
+weak_alias (__getcontext, getcontext)