sys/compat/linux/arch/m68k/linux_machdep.h

   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
  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 */