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

     /*
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * Ralph Campbell.
      *
      * 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.
     * 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.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
     *
     *      @(#)ucontext.h  8.1 (Berkeley) 6/10/93
     *      JNPR: ucontext.h,v 1.2 2007/08/09 11:23:32 katta
     * $FreeBSD: releng/8.0/sys/mips/include/ucontext.h 178172 2008-04-13 07:27:37Z imp $
     */
    
    #ifndef _MACHINE_UCONTEXT_H_
    #define _MACHINE_UCONTEXT_H_
    
    #ifndef _LOCORE
    
    typedef struct  __mcontext {
            /*
             * These fields must match the corresponding fields in struct 
             * sigcontext which follow 'sc_mask'. That way we can support
             * struct sigcontext and ucontext_t at the same time.
             */
            int             mc_onstack;     /* sigstack state to restore */
            register_t      mc_pc;          /* pc at time of signal */
            register_t      mc_regs[32];    /* processor regs 0 to 31 */
            register_t      sr;             /* status register */
            register_t      mullo, mulhi;   /* mullo and mulhi registers... */
            int             mc_fpused;      /* fp has been used */
            f_register_t    mc_fpregs[33];  /* fp regs 0 to 31 and csr */
            register_t      mc_fpc_eir;     /* fp exception instruction reg */
            int     __spare__[8];   /* XXX reserved */ 
    } mcontext_t;
    #endif
    
    #define SZREG           4
    
    /* offsets into mcontext_t */
    #define UCTX_REG(x)     (8 + (x)*SZREG)
    
    #define UCR_ZERO        UCTX_REG(0)
    #define UCR_AT          UCTX_REG(1)
    #define UCR_V0          UCTX_REG(2)
    #define UCR_V1          UCTX_REG(3)
    #define UCR_A0          UCTX_REG(4)
    #define UCR_A1          UCTX_REG(5)
    #define UCR_A2          UCTX_REG(6)
    #define UCR_A3          UCTX_REG(7)
    #define UCR_T0          UCTX_REG(8)
    #define UCR_T1          UCTX_REG(9)
    #define UCR_T2          UCTX_REG(10)
    #define UCR_T3          UCTX_REG(11)
    #define UCR_T4          UCTX_REG(12)
    #define UCR_T5          UCTX_REG(13)
    #define UCR_T6          UCTX_REG(14)
    #define UCR_T7          UCTX_REG(15)
    #define UCR_S0          UCTX_REG(16)
    #define UCR_S1          UCTX_REG(17)
    #define UCR_S2          UCTX_REG(18)
    #define UCR_S3          UCTX_REG(19)
    #define UCR_S4          UCTX_REG(20)
    #define UCR_S5          UCTX_REG(21)
    #define UCR_S6          UCTX_REG(22)
    #define UCR_S7          UCTX_REG(23)
    #define UCR_T8          UCTX_REG(24)
    #define UCR_T9          UCTX_REG(25)
    #define UCR_K0          UCTX_REG(26)
    #define UCR_K1          UCTX_REG(27)
    #define UCR_GP          UCTX_REG(28)
    #define UCR_SP          UCTX_REG(29)
    #define UCR_S8          UCTX_REG(30)
    #define UCR_RA          UCTX_REG(31)
    #define UCR_SR          UCTX_REG(32)
    #define UCR_MDLO        UCTX_REG(33)
    #define UCR_MDHI        UCTX_REG(34)
   
   #endif  /* !_MACHINE_UCONTEXT_H_ */

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