The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/ucontext.h

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    1 /*-
    2  * Copyright (c) 1999 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer 
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/9.2/sys/i386/include/ucontext.h 231979 2012-02-21 20:56:03Z kib $
   29  */
   30 
   31 #ifndef _MACHINE_UCONTEXT_H_
   32 #define _MACHINE_UCONTEXT_H_
   33 
   34 /* Keep _MC_* values similar to amd64 */
   35 #define _MC_HASSEGS     0x1
   36 #define _MC_HASBASES    0x2
   37 #define _MC_HASFPXSTATE 0x4
   38 #define _MC_FLAG_MASK   (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
   39 
   40 typedef struct __mcontext {
   41         /*
   42          * The definition of mcontext_t must match the layout of
   43          * struct sigcontext after the sc_mask member.  This is so
   44          * that we can support sigcontext and ucontext_t at the same
   45          * time.
   46          */
   47         __register_t    mc_onstack;     /* XXX - sigcontext compat. */
   48         __register_t    mc_gs;          /* machine state (struct trapframe) */
   49         __register_t    mc_fs;
   50         __register_t    mc_es;
   51         __register_t    mc_ds;
   52         __register_t    mc_edi;
   53         __register_t    mc_esi;
   54         __register_t    mc_ebp;
   55         __register_t    mc_isp;
   56         __register_t    mc_ebx;
   57         __register_t    mc_edx;
   58         __register_t    mc_ecx;
   59         __register_t    mc_eax;
   60         __register_t    mc_trapno;
   61         __register_t    mc_err;
   62         __register_t    mc_eip;
   63         __register_t    mc_cs;
   64         __register_t    mc_eflags;
   65         __register_t    mc_esp;
   66         __register_t    mc_ss;
   67 
   68         int     mc_len;                 /* sizeof(mcontext_t) */
   69 #define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
   70 #define _MC_FPFMT_387           0x10001
   71 #define _MC_FPFMT_XMM           0x10002
   72         int     mc_fpformat;
   73 #define _MC_FPOWNED_NONE        0x20000 /* FP state not used */
   74 #define _MC_FPOWNED_FPU         0x20001 /* FP state came from FPU */
   75 #define _MC_FPOWNED_PCB         0x20002 /* FP state came from PCB */
   76         int     mc_ownedfp;
   77         __register_t mc_flags;
   78         /*
   79          * See <machine/npx.h> for the internals of mc_fpstate[].
   80          */
   81         int     mc_fpstate[128] __aligned(16);
   82 
   83         __register_t mc_fsbase;
   84         __register_t mc_gsbase;
   85 
   86         __register_t mc_xfpustate;
   87         __register_t mc_xfpustate_len;
   88 
   89         int     mc_spare2[4];
   90 } mcontext_t;
   91 
   92 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
   93 struct mcontext4 {
   94         __register_t    mc_onstack;     /* XXX - sigcontext compat. */
   95         __register_t    mc_gs;          /* machine state (struct trapframe) */
   96         __register_t    mc_fs;
   97         __register_t    mc_es;
   98         __register_t    mc_ds;
   99         __register_t    mc_edi;
  100         __register_t    mc_esi;
  101         __register_t    mc_ebp;
  102         __register_t    mc_isp;
  103         __register_t    mc_ebx;
  104         __register_t    mc_edx;
  105         __register_t    mc_ecx;
  106         __register_t    mc_eax;
  107         __register_t    mc_trapno;
  108         __register_t    mc_err;
  109         __register_t    mc_eip;
  110         __register_t    mc_cs;
  111         __register_t    mc_eflags;
  112         __register_t    mc_esp;         /* machine state */
  113         __register_t    mc_ss;
  114         __register_t    mc_fpregs[28];  /* env87 + fpacc87 + u_long */
  115         __register_t    __spare__[17];
  116 };
  117 #endif
  118 
  119 #endif /* !_MACHINE_UCONTEXT_H_ */

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