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      1 /*	$NetBSD: linux_machdep.h,v 1.7 2008/04/28 20:23:42 martin 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 
     44 struct 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  */
     76 struct 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 
     99 typedef 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 
    105 typedef 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 
    112 struct 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 
    120 struct 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  */
    143 struct 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
    159 void linux_syscall_intern(struct proc *);
    160 __END_DECLS
    161 #endif /* !_KERNEL */
    162 
    163 #endif /* _M68K_LINUX_MACHDEP_H */
    164