/*      $NetBSD: mcontext.h,v 1.26 2024/11/30 01:04:13 christos Exp $   */

/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _POWERPC_MCONTEXT_H_
#define _POWERPC_MCONTEXT_H_

/*
* Layout of mcontext_t based on the System V Application Binary Interface,
* Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and
* extended for the AltiVec Register File.  Note that due to the increased
* alignment requirements of the latter, the offset of mcontext_t within
* an ucontext_t is different from System V.
*/

#define _NGREG  39              /* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */

typedef long            __greg_t;
typedef __greg_t        __gregset_t[_NGREG];

#define _REG_R0         0
#define _REG_R1         1
#define _REG_R2         2
#define _REG_R3         3
#define _REG_R4         4
#define _REG_R5         5
#define _REG_R6         6
#define _REG_R7         7
#define _REG_R8         8
#define _REG_R9         9
#define _REG_R10        10
#define _REG_R11        11
#define _REG_R12        12
#define _REG_R13        13
#define _REG_R14        14
#define _REG_R15        15
#define _REG_R16        16
#define _REG_R17        17
#define _REG_R18        18
#define _REG_R19        19
#define _REG_R20        20
#define _REG_R21        21
#define _REG_R22        22
#define _REG_R23        23
#define _REG_R24        24
#define _REG_R25        25
#define _REG_R26        26
#define _REG_R27        27
#define _REG_R28        28
#define _REG_R29        29
#define _REG_R30        30
#define _REG_R31        31
#define _REG_CR         32              /* Condition Register */
#define _REG_LR         33              /* Link Register */
#define _REG_PC         34              /* PC (copy of SRR0) */
#define _REG_MSR        35              /* MSR (copy of SRR1) */
#define _REG_CTR        36              /* Count Register */
#define _REG_XER        37              /* Integer Exception Register */
#define _REG_MQ         38              /* MQ Register (POWER only) */

typedef struct {
#ifdef _KERNEL
       unsigned long long      __fpu_regs[32]; /* FP0-31 */
#else
       double          __fpu_regs[32]; /* FP0-31 */
#endif
       unsigned int    __fpu_fpscr;    /* FP Status and Control Register */
       unsigned int    __fpu_valid;    /* Set together with _UC_FPU */
} __fpregset_t;

#define _NVR    32                      /* Number of Vector registers */

typedef struct {
       union __vr {
               unsigned char   __vr8[16];
               unsigned short  __vr16[8];
               unsigned int    __vr32[4];
               unsigned char   __spe8[8];
               unsigned short  __spe16[4];
               unsigned int    __spe32[2];
       }               __vrs[_NVR] __aligned(16);
       unsigned int    __vscr;         /* VSCR */
       unsigned int    __vrsave;       /* VRSAVE */
} __vrf_t;

typedef struct {
       __gregset_t     __gregs;        /* General Purpose Register set */
       __fpregset_t    __fpregs;       /* Floating Point Register set */
       __vrf_t         __vrf;          /* Vector Register File */
} mcontext_t;

#if defined(_LP64)
typedef int             __greg32_t;
typedef __greg32_t      __gregset32_t[_NGREG];

typedef struct {
       __gregset32_t   __gregs;        /* General Purpose Register set */
       __fpregset_t    __fpregs;       /* Floating Point Register set */
       __vrf_t         __vrf;          /* Vector Register File */
} mcontext32_t;
#endif

/* Machine-dependent uc_flags */
#define _UC_POWERPC_VEC _UC_MD_BIT16    /* Vector Register File valid */
#define _UC_POWERPC_SPE _UC_MD_BIT17    /* Vector Register File valid */
#define _UC_TLSBASE     _UC_MD_BIT19    /* thread context valid in R2 */
#define _UC_SETSTACK    _UC_MD_BIT20
#define _UC_CLRSTACK    _UC_MD_BIT21

#define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_R1])
#define _UC_MACHINE_FP(uc)      ((uc)->uc_mcontext.__gregs[_REG_R31])
#define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
#define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R3])

#define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)

#endif  /* !_POWERPC_MCONTEXT_H_ */

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.