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  *
   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  * $FreeBSD: releng/9.0/sys/arm/include/ucontext.h 203974 2010-02-16 21:59:17Z imp $
   32  */
   33 
   34 #ifndef _MACHINE_MCONTEXT_H_
   35 #define _MACHINE_MCONTEXT_H_
   36 /*
   37  * General register state
   38  */
   39 #define _NGREG          17
   40 typedef unsigned int    __greg_t;
   41 typedef __greg_t        __gregset_t[_NGREG];
   42 
   43 #define _REG_R0         0
   44 #define _REG_R1         1
   45 #define _REG_R2         2
   46 #define _REG_R3         3
   47 #define _REG_R4         4
   48 #define _REG_R5         5
   49 #define _REG_R6         6
   50 #define _REG_R7         7
   51 #define _REG_R8         8
   52 #define _REG_R9         9
   53 #define _REG_R10        10
   54 #define _REG_R11        11
   55 #define _REG_R12        12
   56 #define _REG_R13        13
   57 #define _REG_R14        14
   58 #define _REG_R15        15
   59 #define _REG_CPSR       16
   60 /* Convenience synonyms */
   61 #define _REG_FP         _REG_R11
   62 #define _REG_SP         _REG_R13
   63 #define _REG_LR         _REG_R14
   64 #define _REG_PC         _REG_R15
   65 
   66 /*
   67  * Floating point register state
   68  */
   69 /* Note: the storage layout of this structure must be identical to ARMFPE! */
   70 typedef struct {
   71         unsigned int    __fp_fpsr;
   72         struct {
   73                 unsigned int    __fp_exponent;
   74                 unsigned int    __fp_mantissa_hi;
   75                 unsigned int    __fp_mantissa_lo;
   76         }               __fp_fr[8];
   77 } __fpregset_t;
   78 
   79 typedef struct {
   80         unsigned int    __vfp_fpscr;
   81         unsigned int    __vfp_fstmx[33];
   82         unsigned int    __vfp_fpsid;
   83 } __vfpregset_t;
   84 
   85 typedef struct {
   86         __gregset_t     __gregs;
   87         union {
   88                 __fpregset_t __fpregs;
   89                 __vfpregset_t __vfpregs;
   90         } __fpu;
   91 } mcontext_t;
   92 
   93 /* Machine-dependent uc_flags */
   94 #define _UC_ARM_VFP     0x00010000      /* FPU field is VFP */
   95 
   96 /* used by signal delivery to indicate status of signal stack */
   97 #define _UC_SETSTACK    0x00020000
   98 #define _UC_CLRSTACK    0x00040000
   99 
  100 #define _UC_MACHINE_PAD 3               /* Padding appended to ucontext_t */
  101 
  102 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
  103 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
  104 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])
  105 
  106 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
  107 
  108 #endif  /* !_MACHINE_MCONTEXT_H_ */

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