sys/arch/sparc/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.9 2008/04/28 20:23:36 martin 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  *
  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
  32 #ifndef _SPARC_MCONTEXT_H_
  33 #define _SPARC_MCONTEXT_H_
  34
  35 #define _UC_SETSTACK    0x00010000
  36 #define _UC_CLRSTACK    0x00020000
  37
  38 /*
  39  * Layout of mcontext_t according the System V Application Binary Interface,
  40  * Edition 4.1, SPARC Processor ABI Supplement and updated for SPARC v9.
  41  */
  42
  43 #ifdef __arch64__
  44 #define _NGREG  21      /* %ccr, pc, npc, %g1-7, %o0-7, %asi, %fprs */
  45 #else
  46 #define _NGREG  19      /* %psr, pc, npc, %g1-7, %o0-7 */
  47 #endif
  48 typedef long int        __greg_t;
  49 typedef __greg_t        __gregset_t[_NGREG];
  50
  51 /* Offsets into gregset_t, for convenience. */
  52 #define _REG_CCR        0       /* 64 bit only */
  53 #define _REG_PSR        0       /* 32 bit only */
  54 #define _REG_PC         1
  55 #define _REG_nPC        2
  56 #define _REG_Y          3
  57 #define _REG_G1         4
  58 #define _REG_G2         5
  59 #define _REG_G3         6
  60 #define _REG_G4         7
  61 #define _REG_G5         8
  62 #define _REG_G6         9
  63 #define _REG_G7         10
  64 #define _REG_O0         11
  65 #define _REG_O1         12
  66 #define _REG_O2         13
  67 #define _REG_O3         14
  68 #define _REG_O4         15
  69 #define _REG_O5         16
  70 #define _REG_O6         17
  71 #define _REG_O7         18
  72 #define _REG_ASI        19      /* 64 bit only */
  73 #define _REG_FPRS       20      /* 64 bit only */
  74
  75
  76 #define _SPARC_MAXREGWINDOW     31
  77
  78 /* Layout of a register window. */
  79 typedef struct {
  80         __greg_t        __rw_local[8];  /* %l0-7 */
  81         __greg_t        __rw_in[8];     /* %i0-7 */
  82 } __rwindow_t;
  83
  84 /* Description of available register windows. */
  85 typedef struct {
  86         int             __wbcnt;
  87         __greg_t *      __spbuf[_SPARC_MAXREGWINDOW];
  88         __rwindow_t     __wbuf[_SPARC_MAXREGWINDOW];
  89 } __gwindows_t;
  90
  91 /* FPU address queue */
  92 struct __fpq {
  93         unsigned int *  __fpq_addr;     /* address */
  94         unsigned int    __fpq_instr;    /* instruction */
  95 };
  96
  97 struct __fq {
  98         union {
  99                 double          __whole;
 100                 struct __fpq    __fpq;
 101         } _FQu;
 102 };
 103
 104 /* FPU state description */
 105 typedef struct {
 106         union {
 107                 unsigned int    __fpu_regs[32];
 108 #ifdef __arch64__
 109                 double          __fpu_dregs[32];
 110                 long double     __fpu_qregs[16];
 111 #else
 112                 double          __fpu_dregs[16];
 113 #endif
 114         } __fpu_fr;                             /* FPR contents */
 115         struct __fq *   __fpu_q;                /* pointer to FPU insn queue */
 116         unsigned long   __fpu_fsr;              /* %fsr */
 117         unsigned char   __fpu_qcnt;             /* # entries in __fpu_q */
 118         unsigned char   __fpu_q_entrysize;      /* size of a __fpu_q entry */
 119         unsigned char   __fpu_en;               /* this context valid? */
 120 } __fpregset_t;
 121
 122 /* `Extra Register State'(?) */
 123 typedef struct {
 124         unsigned int    __xrs_id;       /* See below */
 125         char *          __xrs_ptr;      /* points into filler area */
 126 } __xrs_t;
 127
 128 #define _XRS_ID         0x78727300      /* 'xrs\0' */
 129
 130 #ifdef __arch64__
 131 /* Ancillary State Registers, 16-31 are available to user programs */
 132 typedef long            __asrset_t[16]; /* %asr16-31 */
 133 #endif
 134
 135 typedef struct {
 136         __gregset_t     __gregs;        /* GPR state */
 137         __gwindows_t *  __gwins;        /* may point to register windows */
 138         __fpregset_t    __fpregs;       /* FPU state, if any */
 139         __xrs_t         __xrs;          /* may indicate extra reg state */
 140 #ifdef __arch64__
 141         __asrset_t      __asrs;         /* ASR state */
 142 #endif
 143 } mcontext_t;
 144
 145 #ifdef __arch64__
 146 #define _UC_MACHINE_PAD 8               /* Padding appended to ucontext_t */
 147 #define _UC_MACHINE_SP(uc)      (((uc)->uc_mcontext.__gregs[_REG_O6])+0x7ff)
 148 #define _UC_MACHINE32_PAD       43      /* compat_netbsd32 variant */
 149 #define _UC_MACHINE32_SP(uc)    ((uc)->uc_mcontext.__gregs[_REG_O6])
 150 #else
 151 #define _UC_MACHINE_PAD 43              /* Padding appended to ucontext_t */
 152 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_O6])
 153 #endif
 154 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
 155 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_O0])
 156
 157 #define _UC_MACHINE_SET_PC(uc, pc)                                      \
 158 do {                                                                    \
 159         (uc)->uc_mcontext.__gregs[_REG_PC] = (pc);                      \
 160         (uc)->uc_mcontext.__gregs[_REG_nPC] = (pc) + 4;                 \
 161 } while (/*CONSTCOND*/0)
 162
 163 #endif  /* !_SPARC_MCONTEXT_H_ */