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/* Machine-dependent processor state structure for FreeBSD.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library. i386 version.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#if !defined _SYS_UCONTEXT_H
# error "Never use <bits/mcontext.h> directly; include <sys/ucontext.h> instead."
#endif
/*-
* Copyright (c) 1999 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* based on $FreeBSD: src/sys/i386/include/ucontext.h,v 1.10 2002/12/02 19:58:55 deischen Exp $
*/
/* Whole processor state. */
typedef struct
{
/*
* The first 20 fields must match the definition of
* sigcontext. So that we can support sigcontext
* and ucontext_t at the same time.
*/
int mc_onstack; /* Nonzero if running on sigstack. */
/* Segment registers. */
int mc_gs;
int mc_fs;
int mc_es;
int mc_ds;
/* "General" registers. These members are in the order that the i386
`pusha' and `popa' instructions use (`popa' ignores %esp). */
int mc_edi;
int mc_esi;
int mc_ebp;
int mc_isp; /* Not used; sc_esp is used instead. */
int mc_ebx;
int mc_edx;
int mc_ecx;
int mc_eax;
int mc_trapno;
int mc_err;
int mc_eip; /* Instruction pointer. */
int mc_cs; /* Code segment register. */
int mc_efl; /* Processor flags. */
int mc_esp; /* This stack pointer is used. */
int mc_ss; /* Stack segment register. */
int mc_len; /* sizeof(mcontext_t) */
#define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
#define _MC_FPFMT_387 0x10001
#define _MC_FPFMT_XMM 0x10002
int mc_fpformat;
#define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
#define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
/*
* See <machine/npx.h> for the internals of mc_fpstate[].
*/
int mc_fpstate[128] __attribute__((aligned(16)));
int mc_spare2[8];
} mcontext_t;
/* Traditional BSD names for some members. */
#define mc_eflags mc_efl
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