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reg.h revision 1.4 
      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  *	$Id: reg.h,v 1.4 1993/09/05 03:54:15 sef Exp $
     38  */
     39 
     40 /*
     41  * Location of the users' stored
     42  * registers within appropriate frame of 'trap' and 'syscall', relative to
     43  * base of stack frame.
     44  * Normal usage is u.u_ar0[XX] in kernel.
     45  */
     46 
     47 /* When referenced during a trap/exception, registers are at these offsets */
     48 
     49 #define	tES	(0)
     50 #define	tDS	(1)
     51 #define	tEDI	(2)
     52 #define	tESI	(3)
     53 #define	tEBP	(4)
     54 
     55 #define	tEBX	(6)
     56 #define	tEDX	(7)
     57 #define	tECX	(8)
     58 #define	tEAX	(9)
     59 
     60 #define	tEIP	(12)
     61 #define	tCS	(13)
     62 #define	tEFLAGS	(14)
     63 #define	tESP	(15)
     64 #define	tSS	(16)
     65 
     66 /* During a system call, registers are at these offsets instead of above. */
     67 
     68 #define	sEDI	(0)
     69 #define	sESI	(1)
     70 #define	sEBP	(2)
     71 
     72 #define	sEBX	(4)
     73 #define	sEDX	(5)
     74 #define	sECX	(6)
     75 #define	sEAX	(7)
     76 #define	sEFLAGS	(8)
     77 #define	sEIP	(9)
     78 #define	sCS	(10)
     79 #define	sESP	(11)
     80 #define	sSS	(12)
     81 
     82 #define	PC	sEIP
     83 #define	SP	sESP
     84 #define	PS	sEFLAGS
     85 #define	R0	sEDX
     86 #define	R1	sECX
     87 /*
     88  * Registers accessible to ptrace(2) syscall for debugger
     89  * The machine-dependent code for PT_{SET,GET}REGS needs to
     90  * use whichver order, defined above, is correct, so that it
     91  * is all invisible to the user.
     92  */
     93 struct regs {
     94 	unsigned int	r_es;
     95 	unsigned int	r_ds;
     96 	unsigned int	r_edi;
     97 	unsigned int	r_esi;
     98 	unsigned int	r_ebp;
     99 	unsigned int	r_ebx;
    100 	unsigned int	r_edx;
    101 	unsigned int	r_ecx;
    102 	unsigned int	r_eax;
    103 	unsigned int	r_eip;
    104 	unsigned int	r_cs;
    105 	unsigned int	r_eflags;
    106 	unsigned int	r_esp;
    107 	unsigned int	r_ss;
    108 	unsigned int	r_fs;
    109 	unsigned int	r_gs;
    110 };
    111