sys/arch/m68k/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.5 2005/12/11 12:17:53 christos Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Klaus Klein.
   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_MCONTEXT_H_
  33 #define _M68K_MCONTEXT_H_
  34
  35 #ifdef _KERNEL
  36 #include <m68k/cpuframe.h>
  37 #endif
  38
  39 /*
  40  * mcontext extensions to handle signal delivery.
  41  */
  42 #define _UC_SETSTACK    0x00010000
  43 #define _UC_CLRSTACK    0x00020000
  44
  45 /*
  46  * General register state
  47  */
  48 #define _NGREG          18
  49 typedef int             __greg_t;
  50 typedef __greg_t        __gregset_t[_NGREG];
  51
  52 #define _REG_D0 0
  53 #define _REG_D1 1
  54 #define _REG_D2 2
  55 #define _REG_D3 3
  56 #define _REG_D4 4
  57 #define _REG_D5 5
  58 #define _REG_D6 6
  59 #define _REG_D7 7
  60 #define _REG_A0 8
  61 #define _REG_A1 9
  62 #define _REG_A2 10
  63 #define _REG_A3 11
  64 #define _REG_A4 12
  65 #define _REG_A5 13
  66 #define _REG_A6 14
  67 #define _REG_A7 15
  68 #define _REG_PC 16
  69 #define _REG_PS 17
  70
  71 typedef struct {
  72         int     __fp_pcr;
  73         int     __fp_psr;
  74         int     __fp_piaddr;
  75         int     __fp_fpregs[8*3];
  76 } __fpregset_t;
  77
  78 typedef struct {
  79         __gregset_t     __gregs;        /* General Register set */
  80         __fpregset_t    __fpregs;       /* Floating Point Register set */
  81         union {
  82                 long    __mc_state[202];        /* Only need 308 bytes... */
  83 #if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
  84                 struct {
  85                         /* Rest of the frame. */
  86                         unsigned int    __mcf_format;
  87                         unsigned int    __mcf_vector;
  88                         union F_u       __mcf_exframe;
  89                         /* Rest of the FPU frame. */
  90                         union FPF_u1    __mcf_fpf_u1;
  91                         union FPF_u2    __mcf_fpf_u2;
  92                 } __mc_frame;
  93 #endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
  94         }               __mc_pad;
  95 } mcontext_t;
  96
  97 /* Note: no additional padding is to be performed in ucontext_t. */
  98
  99 /* Machine-specific uc_flags value */
 100 #define _UC_M68K_UC_USER 0x40000000
 101
 102 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_A7])
 103 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
 104 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_D0])
 105
 106 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 107
 108 #endif  /* !_M68K_MCONTEXT_H_ */