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/amd64/include/reg.h

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    1 /*-
    2  * Copyright (c) 2003 Peter Wemm.
    3  * Copyright (c) 1990 The Regents of the University of California.
    4  * All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * William Jolitz.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      from: @(#)reg.h 5.5 (Berkeley) 1/18/91
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _MACHINE_REG_H_
   38 #define _MACHINE_REG_H_
   39 
   40 /*
   41  * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
   42  */
   43 struct reg {
   44         register_t      r_r15;
   45         register_t      r_r14;
   46         register_t      r_r13;
   47         register_t      r_r12;
   48         register_t      r_r11;
   49         register_t      r_r10;
   50         register_t      r_r9;
   51         register_t      r_r8;
   52         register_t      r_rdi;
   53         register_t      r_rsi;
   54         register_t      r_rbp;
   55         register_t      r_rbx;
   56         register_t      r_rdx;
   57         register_t      r_rcx;
   58         register_t      r_rax;
   59         register_t      r_trapno;
   60         register_t      r_err;
   61         register_t      r_rip;
   62         register_t      r_cs;
   63         register_t      r_rflags;
   64         register_t      r_rsp;
   65         register_t      r_ss;
   66 };
   67 
   68 /*
   69  * Register set accessible via /proc/$pid/fpregs.
   70  */
   71 struct fpreg {
   72         /*
   73          * XXX should get struct from fpu.h.  Here we give a slightly
   74          * simplified struct.  This may be too much detail.  Perhaps
   75          * an array of unsigned longs is best.
   76          */
   77         unsigned long   fpr_env[4];
   78         unsigned char   fpr_acc[8][16];
   79         unsigned char   fpr_xacc[16][16];
   80         unsigned long   fpr_spare[12];
   81 };
   82 
   83 /*
   84  * Register set accessible via /proc/$pid/dbregs.
   85  */
   86 struct dbreg {
   87         unsigned long  dr[16];  /* debug registers */
   88                                 /* Index 0-3: debug address registers */
   89                                 /* Index 4-5: reserved */
   90                                 /* Index 6: debug status */
   91                                 /* Index 7: debug control */
   92                                 /* Index 8-15: reserved */
   93 };
   94 
   95 #define DBREG_DR7_LOCAL_ENABLE  0x01
   96 #define DBREG_DR7_GLOBAL_ENABLE 0x02
   97 #define DBREG_DR7_LEN_1         0x00    /* 1 byte length          */
   98 #define DBREG_DR7_LEN_2         0x01
   99 #define DBREG_DR7_LEN_4         0x03
  100 #define DBREG_DR7_LEN_8         0x02
  101 #define DBREG_DR7_EXEC          0x00    /* break on execute       */
  102 #define DBREG_DR7_WRONLY        0x01    /* break on write         */
  103 #define DBREG_DR7_RDWR          0x03    /* break on read or write */
  104 #define DBREG_DR7_MASK(i)       ((u_long)0xf << ((i) * 4 + 16) | 0x3 << (i) * 2)
  105 #define DBREG_DR7_SET(i, len, access, enable)                           \
  106         ((u_long)((len) << 2 | (access)) << ((i) * 4 + 16) | (enable) << (i) * 2)
  107 #define DBREG_DR7_GD            0x2000
  108 #define DBREG_DR7_ENABLED(d, i) (((d) & 0x3 << (i) * 2) != 0)
  109 #define DBREG_DR7_ACCESS(d, i)  ((d) >> ((i) * 4 + 16) & 0x3)
  110 #define DBREG_DR7_LEN(d, i)     ((d) >> ((i) * 4 + 18) & 0x3)
  111 
  112 #define DBREG_DRX(d,x)  ((d)->dr[(x)])  /* reference dr0 - dr15 by
  113                                            register number */
  114 
  115 #ifdef _KERNEL
  116 /*
  117  * XXX these interfaces are MI, so they should be declared in a MI place.
  118  */
  119 int     fill_regs(struct thread *, struct reg *);
  120 int     set_regs(struct thread *, struct reg *);
  121 int     fill_fpregs(struct thread *, struct fpreg *);
  122 int     set_fpregs(struct thread *, struct fpreg *);
  123 int     fill_dbregs(struct thread *, struct dbreg *);
  124 int     set_dbregs(struct thread *, struct dbreg *);
  125 #endif
  126 
  127 #endif /* !_MACHINE_REG_H_ */

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