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_ */
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