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Annotation of sys/arch/amd64/include/mcontext.h, Revision 1.1.1.1

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_ */