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/i386/include/reg.h

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    1 /*-
    2  * Copyright (c) 1990 The Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * William Jolitz.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      from: @(#)reg.h 5.5 (Berkeley) 1/18/91
   37  * $FreeBSD: releng/5.0/sys/i386/include/reg.h 106598 2002-11-07 22:42:31Z alfred $
   38  */
   39 
   40 #ifndef _MACHINE_REG_H_
   41 #define _MACHINE_REG_H_
   42 
   43 /*
   44  * Indices for registers in `struct trapframe' and `struct regs'.
   45  *
   46  * This interface is deprecated.  In the kernel, it is only used in FPU
   47  * emulators to convert from register numbers encoded in instructions to
   48  * register values.  Everything else just accesses the relevant struct
   49  * members.  In userland, debuggers tend to abuse this interface since
   50  * they don't understand that `struct regs' is a struct.  I hope they have
   51  * stopped accessing the registers in the trap frame via PT_{READ,WRITE}_U
   52  * and we can stop supporting the user area soon.
   53  */
   54 #define tFS     (0)
   55 #define tES     (1)
   56 #define tDS     (2)
   57 #define tEDI    (3)
   58 #define tESI    (4)
   59 #define tEBP    (5)
   60 #define tISP    (6)
   61 #define tEBX    (7)
   62 #define tEDX    (8)
   63 #define tECX    (9)
   64 #define tEAX    (10)
   65 #define tERR    (12)
   66 #define tEIP    (13)
   67 #define tCS     (14)
   68 #define tEFLAGS (15)
   69 #define tESP    (16)
   70 #define tSS     (17)
   71 
   72 /*
   73  * Indices for registers in `struct regs' only.
   74  *
   75  * Some registers live in the pcb and are only in an "array" with the
   76  * other registers in application interfaces that copy all the registers
   77  * to or from a `struct regs'.
   78  */
   79 #define tGS     (18)
   80 
   81 /*
   82  * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
   83  */
   84 struct reg {
   85         unsigned int    r_fs;
   86         unsigned int    r_es;
   87         unsigned int    r_ds;
   88         unsigned int    r_edi;
   89         unsigned int    r_esi;
   90         unsigned int    r_ebp;
   91         unsigned int    r_isp;
   92         unsigned int    r_ebx;
   93         unsigned int    r_edx;
   94         unsigned int    r_ecx;
   95         unsigned int    r_eax;
   96         unsigned int    r_trapno;
   97         unsigned int    r_err;
   98         unsigned int    r_eip;
   99         unsigned int    r_cs;
  100         unsigned int    r_eflags;
  101         unsigned int    r_esp;
  102         unsigned int    r_ss;
  103         unsigned int    r_gs;
  104 };
  105 
  106 /*
  107  * Register set accessible via /proc/$pid/fpregs.
  108  */
  109 struct fpreg {
  110         /*
  111          * XXX should get struct from npx.h.  Here we give a slightly
  112          * simplified struct.  This may be too much detail.  Perhaps
  113          * an array of unsigned longs is best.
  114          */
  115         unsigned long   fpr_env[7];
  116         unsigned char   fpr_acc[8][10];
  117         unsigned long   fpr_ex_sw;
  118         unsigned char   fpr_pad[64];
  119 };
  120 
  121 /*
  122  * Register set accessible via /proc/$pid/dbregs.
  123  */
  124 struct dbreg {
  125         unsigned int  dr[8];    /* debug registers */
  126                                 /* Index 0-3: debug address registers */
  127                                 /* Index 4-5: reserved */
  128                                 /* Index 6: debug status */
  129                                 /* Index 7: debug control */
  130 };
  131 
  132 #define DBREG_DR7_EXEC      0x00      /* break on execute       */
  133 #define DBREG_DR7_WRONLY    0x01      /* break on write         */
  134 #define DBREG_DR7_RDWR      0x03      /* break on read or write */
  135 #define DBREG_DRX(d,x) ((d)->dr[(x)]) /* reference dr0 - dr7 by
  136                                          register number */
  137 
  138 
  139 #ifdef _KERNEL
  140 /*
  141  * XXX these interfaces are MI, so they should be declared in a MI place.
  142  */
  143 int     fill_regs(struct thread *, struct reg *);
  144 int     set_regs(struct thread *, struct reg *);
  145 int     fill_fpregs(struct thread *, struct fpreg *);
  146 int     set_fpregs(struct thread *, struct fpreg *);
  147 int     fill_dbregs(struct thread *, struct dbreg *);
  148 int     set_dbregs(struct thread *, struct dbreg *);
  149 #endif
  150 
  151 #endif /* !_MACHINE_REG_H_ */

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