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  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      from: @(#)reg.h 5.5 (Berkeley) 1/18/91
   33  * $FreeBSD$
   34  */
   35 
   36 #ifndef _MACHINE_REG_H_
   37 #define _MACHINE_REG_H_
   38 
   39 /*
   40  * Indices for registers in `struct trapframe' and `struct regs'.
   41  *
   42  * This interface is deprecated.  In the kernel, it is only used in FPU
   43  * emulators to convert from register numbers encoded in instructions to
   44  * register values.  Everything else just accesses the relevant struct
   45  * members.  In userland, debuggers tend to abuse this interface since
   46  * they don't understand that `struct regs' is a struct.  I hope they have
   47  * stopped accessing the registers in the trap frame via PT_{READ,WRITE}_U
   48  * and we can stop supporting the user area soon.
   49  */
   50 #define tFS     (0)
   51 #define tES     (1)
   52 #define tDS     (2)
   53 #define tEDI    (3)
   54 #define tESI    (4)
   55 #define tEBP    (5)
   56 #define tISP    (6)
   57 #define tEBX    (7)
   58 #define tEDX    (8)
   59 #define tECX    (9)
   60 #define tEAX    (10)
   61 #define tERR    (12)
   62 #define tEIP    (13)
   63 #define tCS     (14)
   64 #define tEFLAGS (15)
   65 #define tESP    (16)
   66 #define tSS     (17)
   67 
   68 /*
   69  * Indices for registers in `struct regs' only.
   70  *
   71  * Some registers live in the pcb and are only in an "array" with the
   72  * other registers in application interfaces that copy all the registers
   73  * to or from a `struct regs'.
   74  */
   75 #define tGS     (18)
   76 
   77 /*
   78  * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
   79  */
   80 struct reg {
   81         unsigned int    r_fs;
   82         unsigned int    r_es;
   83         unsigned int    r_ds;
   84         unsigned int    r_edi;
   85         unsigned int    r_esi;
   86         unsigned int    r_ebp;
   87         unsigned int    r_isp;
   88         unsigned int    r_ebx;
   89         unsigned int    r_edx;
   90         unsigned int    r_ecx;
   91         unsigned int    r_eax;
   92         unsigned int    r_trapno;
   93         unsigned int    r_err;
   94         unsigned int    r_eip;
   95         unsigned int    r_cs;
   96         unsigned int    r_eflags;
   97         unsigned int    r_esp;
   98         unsigned int    r_ss;
   99         unsigned int    r_gs;
  100 };
  101 
  102 /*
  103  * Register set accessible via /proc/$pid/fpregs.
  104  */
  105 struct fpreg {
  106         /*
  107          * XXX should get struct from npx.h.  Here we give a slightly
  108          * simplified struct.  This may be too much detail.  Perhaps
  109          * an array of unsigned longs is best.
  110          */
  111         unsigned long   fpr_env[7];
  112         unsigned char   fpr_acc[8][10];
  113         unsigned long   fpr_ex_sw;
  114         unsigned char   fpr_pad[64];
  115 };
  116 
  117 struct xmmreg {
  118         /*
  119          * XXX should get struct from npx.h.  Here we give a slightly
  120          * simplified struct.  This may be too much detail.  Perhaps
  121          * an array of unsigned longs is best.
  122          */
  123         unsigned long   xmm_env[8];
  124         unsigned char   xmm_acc[8][16];
  125         unsigned char   xmm_reg[8][16];
  126         unsigned char   xmm_pad[224];
  127 };
  128 
  129 /*
  130  * Register set accessible via /proc/$pid/dbregs.
  131  */
  132 struct dbreg {
  133         unsigned int  dr[8];    /* debug registers */
  134                                 /* Index 0-3: debug address registers */
  135                                 /* Index 4-5: reserved */
  136                                 /* Index 6: debug status */
  137                                 /* Index 7: debug control */
  138 };
  139 
  140 #define DBREG_DR7_LOCAL_ENABLE  0x01
  141 #define DBREG_DR7_GLOBAL_ENABLE 0x02
  142 #define DBREG_DR7_LEN_1         0x00    /* 1 byte length          */
  143 #define DBREG_DR7_LEN_2         0x01
  144 #define DBREG_DR7_LEN_4         0x03
  145 #define DBREG_DR7_EXEC          0x00    /* break on execute       */
  146 #define DBREG_DR7_WRONLY        0x01    /* break on write         */
  147 #define DBREG_DR7_RDWR          0x03    /* break on read or write */
  148 #define DBREG_DR7_MASK(i)       (0xf << ((i) * 4 + 16) | 0x3 << (i) * 2)
  149 #define DBREG_DR7_SET(i, len, access, enable)                           \
  150         (((len) << 2 | (access)) << ((i) * 4 + 16) | (enable) << (i) * 2)
  151 #define DBREG_DR7_GD            0x2000
  152 #define DBREG_DR7_ENABLED(d, i) (((d) & 0x3 << (i) * 2) != 0)
  153 #define DBREG_DR7_ACCESS(d, i)  ((d) >> ((i) * 4 + 16) & 0x3)
  154 #define DBREG_DR7_LEN(d, i)     ((d) >> ((i) * 4 + 18) & 0x3)
  155 
  156 #define DBREG_DRX(d,x)  ((d)->dr[(x)])  /* reference dr0 - dr7 by
  157                                            register number */
  158 
  159 #ifdef _KERNEL
  160 /*
  161  * XXX these interfaces are MI, so they should be declared in a MI place.
  162  */
  163 int     fill_regs(struct thread *, struct reg *);
  164 int     set_regs(struct thread *, struct reg *);
  165 int     fill_fpregs(struct thread *, struct fpreg *);
  166 int     set_fpregs(struct thread *, struct fpreg *);
  167 int     fill_dbregs(struct thread *, struct dbreg *);
  168 int     set_dbregs(struct thread *, struct dbreg *);
  169 #endif
  170 
  171 #endif /* !_MACHINE_REG_H_ */

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