1 files changed, 51 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/ia64/__start_context.S b/ports/sysdeps/unix/sysv/linux/ia64/__start_context.S
new file mode 100644
index 0000000000..6c9afc1aff
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/ia64/__start_context.S
@@ -0,0 +1,51 @@
+/* Copyright (C) 2001, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   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 <features.h>
+
+/* When a context set up by __makecontext() is activated, control
+   transfers to __start_context.  When we get here:
+
+	b1 = entry point of function to call
+	in0 = address of UCP to resume after function returns
+	in1 = global pointer for __start_context
+	out0 .. outN = arguments for function  */
+
+ENTRY(__start_context)
+	.prologue
+	alloc r2 = ar.pfs, 2, 0, 8, 0
+
+	.save rp, r4		// terminate call chain with a NULL rp
+	mov r4 = r0
+	;;
+
+	.body
+	br.call.sptk rp = b1
+1:
+	mov gp = in1			// restore gp
+	cmp.ne p6,p0 = in0, r0		// uc_link != 0 ?
+	;;
+(p6)	mov out0 = in0
+(p6)	br.call.sptk rp = __setcontext
+.Lexit:
+	mov out0 = 0
+	br.call.sptk rp = HIDDEN_JUMPTARGET(exit)
+
+1:	br.cond.sptk .Lexit
+END(__start_context)