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+/* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* System V/m68k ABI compliant context switching support. */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H 1
+
+#include <features.h>
+#include <signal.h>
+
+/* Type for general register. */
+typedef int greg_t;
+
+/* Number of general registers. */
+#define NGREG 18
+
+/* Container for all general registers. */
+typedef greg_t gregset_t[NGREG];
+
+/* Number of each register is the `gregset_t' array. */
+enum
+{
+ R_D0 = 0,
+#define R_D0 R_D0
+ R_D1 = 1,
+#define R_D1 R_D1
+ R_D2 = 2,
+#define R_D2 R_D2
+ R_D3 = 3,
+#define R_D3 R_D3
+ R_D4 = 4,
+#define R_D4 R_D4
+ R_D5 = 5,
+#define R_D5 R_D5
+ R_D6 = 6,
+#define R_D6 R_D6
+ R_D7 = 7,
+#define R_D7 R_D7
+ R_A0 = 8,
+#define R_A0 R_A0
+ R_A1 = 9,
+#define R_A1 R_A1
+ R_A2 = 10,
+#define R_A2 R_A2
+ R_A3 = 11,
+#define R_A3 R_A3
+ R_A4 = 12,
+#define R_A4 R_A4
+ R_A5 = 13,
+#define R_A5 R_A5
+ R_A6 = 14,
+#define R_A6 R_A6
+ R_A7 = 15,
+#define R_A7 R_A7
+ R_SP = 15,
+#define R_SP R_SP
+ R_PC = 16,
+#define R_PC R_PC
+ R_PS = 17
+#define R_PS R_PS
+};
+
+/* Structure to describe FPU registers. */
+typedef struct fpregset
+{
+ int f_pcr;
+ int f_psr;
+ int f_fpiaddr;
+ int f_fpregs[8][3];
+} fpregset_t;
+
+/* Context to describe whole processor state. */
+typedef struct
+{
+ int version;
+ gregset_t gregs;
+} mcontext_t;
+
+#define MCONTEXT_VERSION 1
+
+/* Userlevel context. */
+typedef struct ucontext
+{
+ unsigned long int uc_flags;
+ struct ucontext *uc_link;
+ __sigset_t uc_sigmask;
+ stack_t uc_stack;
+ mcontext_t uc_mcontext;
+ long int uc_filler[201];
+} ucontext_t;
+
+#endif /* sys/ucontext.h */