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Annotation of sys/arch/amd64/include/mcontext.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: mcontext.h,v 1.1 2004/01/28 01:39:39 mickey Exp $     */
        !             2: /*     $NetBSD: mcontext.h,v 1.1 2003/04/26 18:39:44 fvdl Exp $        */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1999 The NetBSD Foundation, Inc.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to The NetBSD Foundation
        !             9:  * by Klaus Klein.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. All advertising materials mentioning features or use of this software
        !            20:  *    must display the following acknowledgement:
        !            21:  *        This product includes software developed by the NetBSD
        !            22:  *        Foundation, Inc. and its contributors.
        !            23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
        !            24:  *    contributors may be used to endorse or promote products derived
        !            25:  *    from this software without specific prior written permission.
        !            26:  *
        !            27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            37:  * POSSIBILITY OF SUCH DAMAGE.
        !            38:  */
        !            39:
        !            40: #ifndef _AMD64_MCONTEXT_H_
        !            41: #define _AMD64_MCONTEXT_H_
        !            42:
        !            43: /*
        !            44:  * Layout of mcontext_t according to the System V Application Binary Interface,
        !            45:  * Intel386(tm) Architecture Processor Supplement, Fourth Edition.
        !            46:  */
        !            47:
        !            48: /*
        !            49:  * General register state
        !            50:  */
        !            51: #define _NGREG         26
        !            52: typedef        long            __greg_t;
        !            53: typedef        __greg_t        __gregset_t[_NGREG];
        !            54:
        !            55: /*
        !            56:  * This is laid out to match trapframe and intrframe (see <machine/frame.h>).
        !            57:  * Hence, memcpy between gregs and a trapframe is possible.
        !            58:  */
        !            59: #define _REG_RDI       0
        !            60: #define _REG_RSI       1
        !            61: #define _REG_RDX       2
        !            62: #define _REG_RCX       3
        !            63: #define _REG_R8                4
        !            64: #define _REG_R9                5
        !            65: #define _REG_R10       6
        !            66: #define _REG_R11       7
        !            67: #define _REG_R12       8
        !            68: #define _REG_R13       9
        !            69: #define _REG_R14       10
        !            70: #define _REG_R15       11
        !            71: #define _REG_RBP       12
        !            72: #define _REG_RBX       13
        !            73: #define _REG_RAX       14
        !            74: #define _REG_GS                15
        !            75: #define _REG_FS                16
        !            76: #define _REG_ES                17
        !            77: #define _REG_DS                18
        !            78: #define _REG_TRAPNO    19
        !            79: #define _REG_ERR       20
        !            80: #define _REG_RIP       21
        !            81: #define _REG_CS                22
        !            82: #define _REG_RFL       23
        !            83: #define _REG_URSP      24
        !            84: #define _REG_SS                25
        !            85:
        !            86: /*
        !            87:  * Floating point register state
        !            88:  */
        !            89: typedef char __fpregset_t[512];
        !            90:
        !            91: /*
        !            92:  * The padding below is to make __fpregs have a 16-byte aligned offset
        !            93:  * within ucontext_t.
        !            94:  */
        !            95:
        !            96: typedef struct {
        !            97:        __gregset_t     __gregs;
        !            98:        long            __pad;
        !            99:        __fpregset_t    __fpregs;
        !           100: } mcontext_t;
        !           101:
        !           102: #define _UC_UCONTEXT_ALIGN     (~0xf)
        !           103:
        !           104: #ifdef _KERNEL
        !           105: #define _UC_MACHINE_SP(uc)     ((uc)->uc_mcontext.__gregs[_REG_URSP])
        !           106: #endif
        !           107:
        !           108: #endif /* !_AMD64_MCONTEXT_H_ */