Home | History | Annotate | Line # | Download | only in include
mcontext.h revision 1.2 
      1 /*	$NetBSD: mcontext.h,v 1.2 2003/01/18 06:23:28 thorpej 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  * 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 _POWERPC_MCONTEXT_H_
     40 #define _POWERPC_MCONTEXT_H_
     41 
     42 /*
     43  * Layout of mcontext_t based on the System V Application Binary Interface,
     44  * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and
     45  * extended for the AltiVec Register File.  Note that due to the increased
     46  * alignment requirements of the latter, the offset of mcontext_t within
     47  * an ucontext_t is different from System V.
     48  */
     49 
     50 #define	_NGREG	39		/* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */
     51 
     52 typedef	int		__greg_t;
     53 typedef	__greg_t	__gregset_t[_NGREG];
     54 
     55 struct __gregs {
     56 	__greg_t	__r_r0;		/* GR0-31 */
     57 	__greg_t	__r_r1;
     58 	__greg_t	__r_r2;
     59 	__greg_t	__r_r3;
     60 	__greg_t	__r_r4;
     61 	__greg_t	__r_r5;
     62 	__greg_t	__r_r6;
     63 	__greg_t	__r_r7;
     64 	__greg_t	__r_r8;
     65 	__greg_t	__r_r9;
     66 	__greg_t	__r_r10;
     67 	__greg_t	__r_r11;
     68 	__greg_t	__r_r12;
     69 	__greg_t	__r_r13;
     70 	__greg_t	__r_r14;
     71 	__greg_t	__r_r15;
     72 	__greg_t	__r_r16;
     73 	__greg_t	__r_r17;
     74 	__greg_t	__r_r18;
     75 	__greg_t	__r_r19;
     76 	__greg_t	__r_r20;
     77 	__greg_t	__r_r21;
     78 	__greg_t	__r_r22;
     79 	__greg_t	__r_r23;
     80 	__greg_t	__r_r24;
     81 	__greg_t	__r_r25;
     82 	__greg_t	__r_r26;
     83 	__greg_t	__r_r27;
     84 	__greg_t	__r_r28;
     85 	__greg_t	__r_r29;
     86 	__greg_t	__r_r30;
     87 	__greg_t	__r_r31;
     88 	__greg_t	__r_cr;		/* Condition Register */
     89 	__greg_t	__r_lr;		/* Link Register */
     90 	__greg_t	__r_pc;		/* PC (copy of SRR0) */
     91 	__greg_t	__r_msr;	/* MSR (copy of SRR1) */
     92 	__greg_t	__r_ctr;	/* Count Register */
     93 	__greg_t	__r_xer;	/* Integer Exception Register */
     94 	__greg_t	__r_mq;		/* MQ Register (POWER only) */
     95 };
     96 
     97 typedef struct {
     98 	double		__fpu_regs[32];	/* FP0-31 */
     99 	unsigned int	__fpu_fpscr;	/* FP Status and Control Register */
    100 	unsigned int	__fpu_valid;	/* Set together with _UC_FPU */
    101 } __fpregset_t;
    102 
    103 #define	_NVR	32			/* Number of Vector registers */
    104 
    105 typedef struct {
    106 	union __vr {
    107 		unsigned char	__vr8[16];
    108 		unsigned short	__vr16[8];
    109 		unsigned int	__vr32[4];
    110 	} 		__vrs[_NVR] __attribute__((__aligned__(16)));
    111 	unsigned int	__vscr;		/* VSCR */
    112 	unsigned int	__vrsave;	/* VRSAVE */
    113 } __vrf_t;
    114 
    115 typedef struct {
    116 	__gregset_t	__gregs;	/* General Purpose Register set */
    117 	__fpregset_t	__fpregs;	/* Floating Point Register set */
    118 	__vrf_t		__vrf;		/* Vector Register File */
    119 } mcontext_t;
    120 
    121 /* Machine-dependent uc_flags */
    122 #define	_UC_POWERPC_VEC	0x00010000	/* Vector Register File valid */
    123 
    124 #define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[1])
    125 
    126 #endif	/* !_POWERPC_MCONTEXT_H_ */
    127