usr/src/boot/sys/x86/include/frame.h

   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  * 3. 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: @(#)frame.h       5.2 (Berkeley) 1/18/91
  34  */
  35
  36 #ifndef _MACHINE_FRAME_H_
  37 #define _MACHINE_FRAME_H_ 1
  38
  39 /*
  40  * System stack frames.
  41  */
  42
  43 #ifdef __i386__
  44 /*
  45  * Exception/Trap Stack Frame
  46  */
  47
  48 struct trapframe {
  49         int     tf_fs;
  50         int     tf_es;
  51         int     tf_ds;
  52         int     tf_edi;
  53         int     tf_esi;
  54         int     tf_ebp;
  55         int     tf_isp;
  56         int     tf_ebx;
  57         int     tf_edx;
  58         int     tf_ecx;
  59         int     tf_eax;
  60         int     tf_trapno;
  61         /* below portion defined in 386 hardware */
  62         int     tf_err;
  63         int     tf_eip;
  64         int     tf_cs;
  65         int     tf_eflags;
  66         /* below only when crossing rings (user to kernel) */
  67         int     tf_esp;
  68         int     tf_ss;
  69 };
  70
  71 /* Superset of trap frame, for traps from virtual-8086 mode */
  72
  73 struct trapframe_vm86 {
  74         int     tf_fs;
  75         int     tf_es;
  76         int     tf_ds;
  77         int     tf_edi;
  78         int     tf_esi;
  79         int     tf_ebp;
  80         int     tf_isp;
  81         int     tf_ebx;
  82         int     tf_edx;
  83         int     tf_ecx;
  84         int     tf_eax;
  85         int     tf_trapno;
  86         /* below portion defined in 386 hardware */
  87         int     tf_err;
  88         int     tf_eip;
  89         int     tf_cs;
  90         int     tf_eflags;
  91         /* below only when crossing rings (user (including vm86) to kernel) */
  92         int     tf_esp;
  93         int     tf_ss;
  94         /* below only when crossing from vm86 mode to kernel */
  95         int     tf_vm86_es;
  96         int     tf_vm86_ds;
  97         int     tf_vm86_fs;
  98         int     tf_vm86_gs;
  99 };
 100
 101 /*
 102  * This alias for the MI TRAPF_USERMODE() should be used when we don't
 103  * care about user mode itself, but need to know if a frame has stack
 104  * registers.  The difference is only logical, but on i386 the logic
 105  * for using TRAPF_USERMODE() is complicated by sometimes treating vm86
 106  * bioscall mode (which is a special ring 3 user mode) as kernel mode.
 107  */
 108 #define TF_HAS_STACKREGS(tf)    TRAPF_USERMODE(tf)
 109 #endif /* __i386__ */
 110
 111 #ifdef __amd64__
 112 /*
 113  * Exception/Trap Stack Frame
 114  *
 115  * The ordering of this is specifically so that we can take first 6
 116  * the syscall arguments directly from the beginning of the frame.
 117  */
 118
 119 struct trapframe {
 120         register_t      tf_rdi;
 121         register_t      tf_rsi;
 122         register_t      tf_rdx;
 123         register_t      tf_rcx;
 124         register_t      tf_r8;
 125         register_t      tf_r9;
 126         register_t      tf_rax;
 127         register_t      tf_rbx;
 128         register_t      tf_rbp;
 129         register_t      tf_r10;
 130         register_t      tf_r11;
 131         register_t      tf_r12;
 132         register_t      tf_r13;
 133         register_t      tf_r14;
 134         register_t      tf_r15;
 135         uint32_t        tf_trapno;
 136         uint16_t        tf_fs;
 137         uint16_t        tf_gs;
 138         register_t      tf_addr;
 139         uint32_t        tf_flags;
 140         uint16_t        tf_es;
 141         uint16_t        tf_ds;
 142         /* below portion defined in hardware */
 143         register_t      tf_err;
 144         register_t      tf_rip;
 145         register_t      tf_cs;
 146         register_t      tf_rflags;
 147         /* the amd64 frame always has the stack registers */
 148         register_t      tf_rsp;
 149         register_t      tf_ss;
 150 };
 151
 152 #define TF_HASSEGS      0x1
 153 #define TF_HASBASES     0x2
 154 #define TF_HASFPXSTATE  0x4
 155 #endif /* __amd64__ */
 156
 157 #endif /* _MACHINE_FRAME_H_ */