StdLib/Include/Arm/machine/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  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *        This product includes software developed by the NetBSD
  21  *        Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #ifndef _ARM_MCONTEXT_H_
  40 #define _ARM_MCONTEXT_H_
  41
  42 /*
  43  * General register state
  44  */
  45 #define _NGREG          17
  46 typedef unsigned int    __greg_t;
  47 typedef __greg_t        __gregset_t[_NGREG];
  48
  49 #define _REG_R0         0
  50 #define _REG_R1         1
  51 #define _REG_R2         2
  52 #define _REG_R3         3
  53 #define _REG_R4         4
  54 #define _REG_R5         5
  55 #define _REG_R6         6
  56 #define _REG_R7         7
  57 #define _REG_R8         8
  58 #define _REG_R9         9
  59 #define _REG_R10        10
  60 #define _REG_R11        11
  61 #define _REG_R12        12
  62 #define _REG_R13        13
  63 #define _REG_R14        14
  64 #define _REG_R15        15
  65 #define _REG_CPSR       16
  66 /* Convenience synonyms */
  67 #define _REG_FP         _REG_R11
  68 #define _REG_SP         _REG_R13
  69 #define _REG_LR         _REG_R14
  70 #define _REG_PC         _REG_R15
  71
  72 /*
  73  * Floating point register state
  74  */
  75 /* Note: the storage layout of this structure must be identical to ARMFPE! */
  76 typedef struct {
  77         unsigned int    __fp_fpsr;
  78         struct {
  79                 unsigned int    __fp_exponent;
  80                 unsigned int    __fp_mantissa_hi;
  81                 unsigned int    __fp_mantissa_lo;
  82         }               __fp_fr[8];
  83 } __fpregset_t;
  84
  85 typedef struct {
  86         unsigned int    __vfp_fpscr;
  87         unsigned int    __vfp_fstmx[33];
  88         unsigned int    __vfp_fpsid;
  89 } __vfpregset_t;
  90
  91 typedef struct {
  92         __gregset_t     __gregs;
  93         union {
  94                 __fpregset_t __fpregs;
  95                 __vfpregset_t __vfpregs;
  96         } __fpu;
  97 } mcontext_t;
  98
  99 /* Machine-dependent uc_flags */
 100 #define _UC_ARM_VFP     0x00010000      /* FPU field is VFP */
 101
 102 /* used by signal delivery to indicate status of signal stack */
 103 #define _UC_SETSTACK    0x00020000
 104 #define _UC_CLRSTACK    0x00040000
 105
 106 #define _UC_MACHINE_PAD 3               /* Padding appended to ucontext_t */
 107
 108 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
 109 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
 110 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])
 111
 112 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 113
 114 #endif  /* !_ARM_MCONTEXT_H_ */