sys/arch/i386/include/freebsd_machdep.h

   1 /*      $NetBSD: freebsd_machdep.h,v 1.8 2003/10/27 13:44:20 junyoung Exp $     */
   2
   3 /*
   4  * Copyright (c) 1986, 1989, 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz.
   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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      from: @(#)signal.h      8.1 (Berkeley) 6/11/93
  35  *      from: Id: signal.h,v 1.4 1994/08/21 04:55:30 paul Exp
  36  *
  37  *      from: @(#)frame.h       5.2 (Berkeley) 1/18/91
  38  *      from: Id: frame.h,v 1.10 1995/03/16 18:11:42 bde Exp
  39  */
  40 #ifndef _FREEBSD_MACHDEP_H
  41 #define _FREEBSD_MACHDEP_H
  42
  43 #include <compat/sys/sigtypes.h>
  44
  45 /*
  46  * signal support
  47  */
  48
  49 struct freebsd_osigcontext {
  50         int     sc_onstack;     /* sigstack state to restore */
  51         sigset13_t sc_mask;     /* signal mask to restore */
  52         int     sc_esp;         /* machine state */
  53         int     sc_ebp;
  54         int     sc_isp;
  55         int     sc_eip;
  56         int     sc_eflags;
  57         int     sc_es;
  58         int     sc_ds;
  59         int     sc_cs;
  60         int     sc_ss;
  61         int     sc_edi;
  62         int     sc_esi;
  63         int     sc_ebx;
  64         int     sc_edx;
  65         int     sc_ecx;
  66         int     sc_eax;
  67 };
  68
  69 /*
  70  * The sequence of the fields/registers in struct sigcontext should match
  71  * those in mcontext_t.
  72  */
  73 struct freebsd_sigcontext {
  74         sigset_t sc_mask;               /* signal mask to restore */
  75         int     sc_onstack;             /* sigstack state to restore */
  76         int     sc_gs;                  /* machine state (struct trapframe): */
  77         int     sc_fs;
  78         int     sc_es;
  79         int     sc_ds;
  80         int     sc_edi;
  81         int     sc_esi;
  82         int     sc_ebp;
  83         int     sc_isp;
  84         int     sc_ebx;
  85         int     sc_edx;
  86         int     sc_ecx;
  87         int     sc_eax;
  88         int     sc_trapno;
  89         int     sc_err;
  90         int     sc_eip;
  91         int     sc_cs;
  92         int     sc_efl;
  93         int     sc_esp;
  94         int     sc_ss;
  95         /*
  96          * XXX FPU state is 27 * 4 bytes h/w, 1 * 4 bytes s/w (probably not
  97          * needed here), or that + 16 * 4 bytes for emulators (probably all
  98          * needed here).  The "spare" bytes are mostly not spare.
  99          */
 100         int     sc_fpregs[28];          /* machine state (FPU): */
 101         int     sc_spare[17];
 102 };
 103
 104 struct freebsd_sigframe {
 105         int     sf_signum;
 106         int     sf_code;
 107         struct  freebsd_sigcontext *sf_scp;
 108         char    *sf_addr;
 109         sig_t   sf_handler;
 110         struct  freebsd_sigcontext sf_sc;
 111 };
 112
 113 /*
 114  * freebsd_ptrace(2) support
 115  */
 116
 117 #define FREEBSD_USRSTACK        0xefbfe000 /* USRSTACK */
 118 #define FREEBSD_U_AR0_OFFSET    0x0000045c /* offsetof(struct user, u_ar0) */
 119 #define FREEBSD_U_SAVEFP_OFFSET 0x00000070
 120         /* offsetof(struct user, u_pcb) + offsetof(struct pcb, pcb_savefpu) */
 121
 122 /* Exception/Trap Stack Frame */
 123 struct freebsd_trapframe {
 124         int     tf_es;
 125         int     tf_ds;
 126         int     tf_edi;
 127         int     tf_esi;
 128         int     tf_ebp;
 129         int     tf_isp;
 130         int     tf_ebx;
 131         int     tf_edx;
 132         int     tf_ecx;
 133         int     tf_eax;
 134         int     tf_trapno;
 135         /* below portion defined in 386 hardware */
 136         int     tf_err;
 137         int     tf_eip;
 138         int     tf_cs;
 139         int     tf_eflags;
 140         /* below only when transitting rings (e.g. user to kernel) */
 141         int     tf_esp;
 142         int     tf_ss;
 143 };
 144
 145 /* Environment information of floating point unit */
 146 struct freebsd_env87 {
 147         long    en_cw;          /* control word (16bits) */
 148         long    en_sw;          /* status word (16bits) */
 149         long    en_tw;          /* tag word (16bits) */
 150         long    en_fip;         /* floating point instruction pointer */
 151         u_short en_fcs;         /* floating code segment selector */
 152         u_short en_opcode;      /* opcode last executed (11 bits ) */
 153         long    en_foo;         /* floating operand offset */
 154         long    en_fos;         /* floating operand segment selector */
 155 };
 156
 157 /* Contents of each floating point accumulator */
 158 struct freebsd_fpacc87 {
 159 #ifdef dontdef /* too unportable */
 160         u_long  fp_mantlo;      /* mantissa low (31:0) */
 161         u_long  fp_manthi;      /* mantissa high (63:32) */
 162         int     fp_exp:15;      /* exponent */
 163         int     fp_sgn:1;       /* mantissa sign */
 164 #else
 165         u_char  fp_bytes[10];
 166 #endif
 167 };
 168
 169 /* Floating point context */
 170 struct freebsd_save87 {
 171         struct freebsd_env87 sv_env;    /* floating point control/status */
 172         struct freebsd_fpacc87 sv_ac[8];        /* accumulator contents, 0-7 */
 173         u_long  sv_ex_sw;               /* status word for last exception */
 174         /*
 175          * Bogus padding for emulators.  Emulators should use their own
 176          * struct and arrange to store into this struct (ending here)
 177          * before it is inspected for ptracing or for core dumps.  Some
 178          * emulators overwrite the whole struct.  We have no good way of
 179          * knowing how much padding to leave.  Leave just enough for the
 180          * GPL emulator's i387_union (176 bytes total).
 181          */
 182         u_char  sv_pad[64];     /* padding; used by emulators */
 183 };
 184
 185 struct freebsd_ptrace_reg {
 186         struct freebsd_trapframe freebsd_ptrace_regs;
 187         struct freebsd_save87 freebsd_ptrace_fpregs;
 188 };
 189
 190 /* sys/i386/include/exec.h */
 191 #define FREEBSD___LDPGSZ        4096
 192
 193 void freebsd_syscall_intern(struct proc *);
 194
 195 #endif /* _FREEBSD_MACHDEP_H */