The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/include/ucontext.h

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    1 /*      $NetBSD: mcontext.h,v 1.4 2003/10/08 22:43:01 thorpej 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  * $FreeBSD: releng/7.4/sys/arm/include/ucontext.h 129198 2004-05-14 11:46:45Z cognet $
   39  */
   40 
   41 #ifndef _MACHINE_MCONTEXT_H_
   42 #define _MACHINE_MCONTEXT_H_
   43 /*
   44  * General register state
   45  */
   46 #define _NGREG          17
   47 typedef unsigned int    __greg_t;
   48 typedef __greg_t        __gregset_t[_NGREG];
   49 
   50 #define _REG_R0         0
   51 #define _REG_R1         1
   52 #define _REG_R2         2
   53 #define _REG_R3         3
   54 #define _REG_R4         4
   55 #define _REG_R5         5
   56 #define _REG_R6         6
   57 #define _REG_R7         7
   58 #define _REG_R8         8
   59 #define _REG_R9         9
   60 #define _REG_R10        10
   61 #define _REG_R11        11
   62 #define _REG_R12        12
   63 #define _REG_R13        13
   64 #define _REG_R14        14
   65 #define _REG_R15        15
   66 #define _REG_CPSR       16
   67 /* Convenience synonyms */
   68 #define _REG_FP         _REG_R11
   69 #define _REG_SP         _REG_R13
   70 #define _REG_LR         _REG_R14
   71 #define _REG_PC         _REG_R15
   72 
   73 /*
   74  * Floating point register state
   75  */
   76 /* Note: the storage layout of this structure must be identical to ARMFPE! */
   77 typedef struct {
   78         unsigned int    __fp_fpsr;
   79         struct {
   80                 unsigned int    __fp_exponent;
   81                 unsigned int    __fp_mantissa_hi;
   82                 unsigned int    __fp_mantissa_lo;
   83         }               __fp_fr[8];
   84 } __fpregset_t;
   85 
   86 typedef struct {
   87         unsigned int    __vfp_fpscr;
   88         unsigned int    __vfp_fstmx[33];
   89         unsigned int    __vfp_fpsid;
   90 } __vfpregset_t;
   91 
   92 typedef struct {
   93         __gregset_t     __gregs;
   94         union {
   95                 __fpregset_t __fpregs;
   96                 __vfpregset_t __vfpregs;
   97         } __fpu;
   98 } mcontext_t;
   99 
  100 /* Machine-dependent uc_flags */
  101 #define _UC_ARM_VFP     0x00010000      /* FPU field is VFP */
  102 
  103 /* used by signal delivery to indicate status of signal stack */
  104 #define _UC_SETSTACK    0x00020000
  105 #define _UC_CLRSTACK    0x00040000
  106 
  107 #define _UC_MACHINE_PAD 3               /* Padding appended to ucontext_t */
  108 
  109 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
  110 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
  111 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])
  112 
  113 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
  114 
  115 #endif  /* !_MACHINE_MCONTEXT_H_ */

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