sys/arch/arm/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.5 2005/12/11 12:16:47 christos Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2001, 2002 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 and by Jason R. Thorpe of Wasabi Systems, Inc.
   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 _ARM_MCONTEXT_H_
  33 #define _ARM_MCONTEXT_H_
  34
  35 /*
  36  * General register state
  37  */
  38 #define _NGREG          17
  39 typedef unsigned int    __greg_t;
  40 typedef __greg_t        __gregset_t[_NGREG];
  41
  42 #define _REG_R0         0
  43 #define _REG_R1         1
  44 #define _REG_R2         2
  45 #define _REG_R3         3
  46 #define _REG_R4         4
  47 #define _REG_R5         5
  48 #define _REG_R6         6
  49 #define _REG_R7         7
  50 #define _REG_R8         8
  51 #define _REG_R9         9
  52 #define _REG_R10        10
  53 #define _REG_R11        11
  54 #define _REG_R12        12
  55 #define _REG_R13        13
  56 #define _REG_R14        14
  57 #define _REG_R15        15
  58 #define _REG_CPSR       16
  59 /* Convenience synonyms */
  60 #define _REG_FP         _REG_R11
  61 #define _REG_SP         _REG_R13
  62 #define _REG_LR         _REG_R14
  63 #define _REG_PC         _REG_R15
  64
  65 /*
  66  * Floating point register state
  67  */
  68 /* Note: the storage layout of this structure must be identical to ARMFPE! */
  69 typedef struct {
  70         unsigned int    __fp_fpsr;
  71         struct {
  72                 unsigned int    __fp_exponent;
  73                 unsigned int    __fp_mantissa_hi;
  74                 unsigned int    __fp_mantissa_lo;
  75         }               __fp_fr[8];
  76 } __fpregset_t;
  77
  78 typedef struct {
  79         unsigned int    __vfp_fpscr;
  80         unsigned int    __vfp_fstmx[33];
  81         unsigned int    __vfp_fpsid;
  82 } __vfpregset_t;
  83
  84 typedef struct {
  85         __gregset_t     __gregs;
  86         union {
  87                 __fpregset_t __fpregs;
  88                 __vfpregset_t __vfpregs;
  89         } __fpu;
  90 } mcontext_t;
  91
  92 /* Machine-dependent uc_flags */
  93 #define _UC_ARM_VFP     0x00010000      /* FPU field is VFP */
  94
  95 /* used by signal delivery to indicate status of signal stack */
  96 #define _UC_SETSTACK    0x00020000
  97 #define _UC_CLRSTACK    0x00040000
  98
  99 #define _UC_MACHINE_PAD 3               /* Padding appended to ucontext_t */
 100
 101 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
 102 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
 103 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])
 104
 105 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 106
 107 #endif  /* !_ARM_MCONTEXT_H_ */