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reg.h revision 1.22 
      1 /*	$NetBSD: reg.h,v 1.22 2019/05/18 17:41:34 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * 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  *	@(#)reg.h	5.5 (Berkeley) 1/18/91
     35  */
     36 
     37 #ifndef _I386_REG_H_
     38 #define _I386_REG_H_
     39 
     40 #include <x86/fpu.h>
     41 #include <machine/frame.h>
     42 
     43 /*
     44  * Location of the users' stored
     45  * registers within appropriate frame of 'trap' and 'syscall', relative to
     46  * base of stack frame.
     47  *
     48  * XXX these should be nuked. They used to be used in the NetBSD/i386 bits
     49  * of gdb, but no more.
     50  */
     51 
     52 /* When referenced during a trap/exception, registers are at these offsets */
     53 
     54 #define	tES	(offsetof(struct trapframe, tf_es) / sizeof (int))
     55 #define	tDS	(offsetof(struct trapframe, tf_ds) / sizeof (int))
     56 #define	tEDI	(offsetof(struct trapframe, tf_edi) / sizeof (int))
     57 #define	tESI	(offsetof(struct trapframe, tf_esi) / sizeof (int))
     58 #define	tEBP	(offsetof(struct trapframe, tf_ebp) / sizeof (int))
     59 #define	tEBX	(offsetof(struct trapframe, tf_ebx) / sizeof (int))
     60 #define	tEDX	(offsetof(struct trapframe, tf_edx) / sizeof (int))
     61 #define	tECX	(offsetof(struct trapframe, tf_ecx) / sizeof (int))
     62 #define	tEAX	(offsetof(struct trapframe, tf_eax) / sizeof (int))
     63 
     64 #define	tEIP	(offsetof(struct trapframe, tf_eip) / sizeof (int))
     65 #define	tCS	(offsetof(struct trapframe, tf_cs) / sizeof (int))
     66 #define	tEFLAGS	(offsetof(struct trapframe, tf_eflags) / sizeof (int))
     67 #define	tESP	(offsetof(struct trapframe, tf_esp) / sizeof (int))
     68 #define	tSS	(offsetof(struct trapframe, tf_ss) / sizeof (int))
     69 
     70 /*
     71  * Registers accessible to ptrace(2) syscall for debugger
     72  * The machine-dependent code for PT_{SET,GET}REGS needs to
     73  * use whichver order, defined above, is correct, so that it
     74  * is all invisible to the user.
     75  */
     76 struct reg {
     77 	int	r_eax;
     78 	int	r_ecx;
     79 	int	r_edx;
     80 	int	r_ebx;
     81 	int	r_esp;
     82 	int	r_ebp;
     83 	int	r_esi;
     84 	int	r_edi;
     85 	int	r_eip;
     86 	int	r_eflags;
     87 	int	r_cs;
     88 	int	r_ss;
     89 	int	r_ds;
     90 	int	r_es;
     91 	int	r_fs;
     92 	int	r_gs;
     93 };
     94 
     95 struct fpreg {
     96 	struct save87 fstate;
     97 };
     98 __CTASSERT_NOLINT(sizeof(struct fpreg) == 108);
     99 
    100 struct xmmregs {
    101 	struct fxsave fxstate;
    102 };
    103 __CTASSERT(sizeof(struct xmmregs) == 512);
    104 
    105 /*
    106  * Debug Registers
    107  *
    108  * DR0-DR3  Debug Address Registers
    109  * DR4-DR5  Reserved
    110  * DR6      Debug Status Register
    111  * DR7      Debug Control Register
    112  */
    113 struct dbreg {
    114 	int	dr[8];
    115 };
    116 
    117 #endif /* !_I386_REG_H_ */
    118