1/*	$NetBSD: linux_machdep.h,v 1.6 2007/12/04 18:40:14 dsl Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by ITOH Yasufumi.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _M68K_LINUX_MACHDEP_H
33#define _M68K_LINUX_MACHDEP_H
34
35#include <m68k/frame.h>
36#include <compat/linux/common/linux_types.h>
37#include <compat/linux/common/linux_signal.h>
38#include <compat/linux/common/linux_siginfo.h>
39
40/*
41 * Signal stack definitions for old signal interface.
42 */
43
44struct linux_sigcontext {
45	linux_old_sigset_t	sc_mask;	/* signal mask to restore */
46	u_int			sc_sp;		/* usp to restore */
47	u_int			sc_d0;
48	u_int			sc_d1;
49	u_int			sc_a0;
50	u_int			sc_a1;
51	u_short			sc_ps;		/* processor status (sr reg) */
52	u_int			sc_pc;
53
54	/*
55	 * The Linux sigstate (state of hardware).
56	 */
57	struct linux_sigstate {
58		u_short		ss_format:4,	/* frame # */
59				ss_vector:12;	/* vector offset */
60		struct linux_fpframe {
61			u_int		fpf_regs[2][3];	/* only fp0 and fp1 */
62			u_int		fpf_fpcr;
63			u_int		fpf_fpsr;
64			u_int		fpf_fpiar;
65			union FPF_u1	FPF_u1;
66			union FPF_u2	FPF_u2;
67		} ss_fpstate;			/* 68881/68882 state info */
68		union F_u	ss_frame;	/* original exception frame */
69	} sc_ss;
70};
71
72/*
73 * The Linux compatible signal frame
74 * On Linux, the sigtramp code is on the frame structure.
75 */
76struct linux_sigframe {
77	void		*sf_psigtramp;
78	int		sf_signum;	/* signo for handler */
79	int		sf_code;	/* Linux stores vector offset here */
80	struct linux_sigcontext	*sf_scp; /* context ptr for handler */
81	int		sf_sigtramp[2];
82	struct linux_sigc2 {
83#if LINUX__NSIG_WORDS > 1
84		/* This breaks backward compatibility, but Linux 2.1 has.... */
85		u_long	c_extrasigmask[LINUX__NSIG_WORDS - 1];
86#endif
87		struct	linux_sigcontext c_sc;	/* actual context */
88	} sf_c;
89};
90
91#define LINUX_SF_SIGTRAMP0 0xDEFC0014	/* addaw #20,sp */
92#define LINUX_SF_SIGTRAMP1 (0x70004E40 | (LINUX_SYS_sigreturn << 16))
93				/* moveq #LINUX_SYS_sigreturn,d0; trap #0 */
94
95/*
96 * Signal stack definitions for new RT signal interface.
97 */
98
99typedef struct linux_gregset {
100	u_int	gr_regs[16];		/* d0-d7/a0-a6/usp */
101	u_int	gr_pc;
102	u_int	gr_sr;
103} linux_gregset_t;
104
105typedef struct linux_fpregset {
106	u_int	fpr_fpcr;
107	u_int	fpr_fpsr;
108	u_int	fpr_fpiar;
109	u_int	fpr_regs[8][3];		/* fp0-fp7 */
110} linux_fpregset_t;
111
112struct linux_mcontext {
113	int			mc_version;
114	linux_gregset_t		mc_gregs;
115	linux_fpregset_t	mc_fpregs;
116};
117
118#define LINUX_MCONTEXT_VERSION	2
119
120struct linux_ucontext {
121	u_long			uc_flags;	/* 0 */
122	struct linux_ucontext	*uc_link;	/* 0 */
123	linux_stack_t		uc_stack;
124	struct linux_mcontext	uc_mc;
125	struct linux_rt_sigstate {
126		struct linux_rt_fpframe {
127			union FPF_u1	FPF_u1;
128			union FPF_u2	FPF_u2;
129		} ss_fpstate;
130		unsigned int	ss_unused1:16,
131				ss_format:4,
132				ss_vector:12;
133		union F_u	ss_frame;	/* original exception frame */
134		int		ss_unused2[4];
135	} uc_ss;
136	linux_sigset_t		uc_sigmask;
137};
138
139/*
140 * The Linux compatible RT signal frame
141 * On Linux, the sigtramp code is on the frame structure.
142 */
143struct linux_rt_sigframe {
144	void			*sf_psigtramp;
145	int			sf_signum;
146	struct linux_siginfo	*sf_pinfo;
147	void			*sf_puc;
148	struct linux_siginfo	sf_info;
149	struct linux_ucontext	sf_uc;
150	int			sf_sigtramp[2];
151};
152
153#define LINUX_RT_SF_SIGTRAMP0 (0x203C0000 | (LINUX_SYS_rt_sigreturn >> 16))
154#define LINUX_RT_SF_SIGTRAMP1 (0x00004E40 | (LINUX_SYS_rt_sigreturn << 16))
155			/* movel #LINUX_SYS_rt_sigreturn,#d0; trap #0 */
156
157#ifdef _KERNEL
158__BEGIN_DECLS
159void linux_syscall_intern(struct proc *);
160__END_DECLS
161#endif /* !_KERNEL */
162
163#endif /* _M68K_LINUX_MACHDEP_H */
164