freebsd-dev/sys/i386/include/ucontext.h

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/*-
* 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_UCONTEXT_H_
#define _MACHINE_UCONTEXT_H_
typedef struct __mcontext {
/*
* 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; /* XXX - sigcontext compat. */
int mc_gs;
int mc_fs;
int mc_es;
int mc_ds;
int mc_edi;
int mc_esi;
int mc_ebp;
int mc_isp;
int mc_ebx;
int mc_edx;
int mc_ecx;
int mc_eax;
int mc_trapno;
int mc_err;
int mc_eip;
int mc_cs;
int mc_eflags;
int mc_esp; /* machine state */
int mc_ss;
int mc_len; /* sizeof(mcontext_t) */
#define _MC_FPFMT_NODEV 0 /* device not present or configured */
#define _MC_FPFMT_387 1
#define _MC_FPFMT_XMM 2
int mc_fpformat;
#define _MC_FPOWNED_NONE 0 /* FP state not used */
#define _MC_FPOWNED_FPU 1 /* FP state came from FPU */
#define _MC_FPOWNED_PCB 2 /* FP state came from PCB */
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
int mc_fpstate[128]; /* must be multiple of 16 bytes */
int mc_spare2[8];
} mcontext_t;
#ifdef _KERNEL
struct thread;
void get_mcontext(struct thread *td, mcontext_t *mcp);
int set_mcontext(struct thread *td, const mcontext_t *mcp);
#endif
#endif /* !_MACHINE_UCONTEXT_H_ */