$NetBSD$

--- src/arch/netbsd/mcontext/amd64-ucontext.h.orig	2017-11-02 06:34:51.950237084 +0000
+++ src/arch/netbsd/mcontext/amd64-ucontext.h
@@ -0,0 +1,76 @@
+/*-
+ * Copyright (c) 1999 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD: src/sys/i386/include/ucontext.h,v 1.4 1999/10/11 20:33:09 luoqi Exp $
+ */
+
+struct m_mcontext {
+	/*
+	 * The first 20 fields must match the definition of
+	 * sigcontext. So that we can support sigcontext
+	 * and ucontext_t at the same time.
+	 */
+	long	mc_onstack;		/* XXX - sigcontext compat. */
+	long	mc_rdi;			/* machine state (struct trapframe) */
+	long	mc_rsi;
+	long	mc_rdx;
+	long	mc_rcx;
+	long	mc_r8;
+	long	mc_r9;
+	long	mc_rax;
+	long	mc_rbx;
+	long	mc_rbp;
+	long	mc_r10;
+	long	mc_r11;
+	long	mc_r12;
+	long	mc_r13;
+	long	mc_r14;
+	long	mc_r15;
+	long	mc_trapno;
+	long	mc_addr;
+	long	mc_flags;
+	long	mc_err;
+	long	mc_rip;
+	long	mc_cs;
+	long	mc_rflags;
+	long	mc_rsp;
+	long	mc_ss;
+
+	long	mc_len;			/* sizeof(mcontext_t) */
+#define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
+#define	_MC_FPFMT_XMM		0x10002
+	long	mc_fpformat;
+#define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
+#define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
+#define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
+	long	mc_ownedfp;
+	/*
+	 * See <machine/fpu.h> for the internals of mc_fpstate[].
+	 */
+	long	mc_fpstate[64];
+	long	mc_spare[8];
+};
