FreeBSD/Linux Kernel Cross Reference
sys/bsd/ppc/setjmp.h

     /*
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
     *
     *      File:   ppc/setjmp.h
     *
     *      Declaration of setjmp routines and data structures.
     */
    #ifndef _BSD_PPC_SETJMP_H_
    #define _BSD_PPC_SETJMP_H_
    
    #include <sys/cdefs.h>
    #include <machine/signal.h>
    
    struct _jmp_buf {
            struct sigcontext       sigcontext; /* kernel state preserved by set/longjmp */
            unsigned long vmask __attribute__((aligned(8))); /* vector mask register */
            unsigned long vreg[32 * 4] __attribute__((aligned(16)));
                    /* 32 128-bit vector registers */
    };
    
    /*
     *      _JBLEN is number of ints required to save the following:
     *      r1, r2, r13-r31, lr, cr, ctr, xer, sig  == 26 ints
     *      fr14 -  fr31 = 18 doubles = 36 ints
     *      vmask, 32 vector registers = 129 ints
     *      2 ints to get all the elements aligned 
     */
    
    #define _JBLEN (26 + 36 + 129 + 1)
    
    #if defined(KERNEL)
    typedef struct sigcontext jmp_buf[1];
    typedef struct __sigjmp_buf {
                    int __storage[_JBLEN + 1] __attribute__((aligned(8)));
                    } sigjmp_buf[1];
    #else
    typedef int jmp_buf[_JBLEN];
    typedef int sigjmp_buf[_JBLEN + 1];
    #endif
    
    __BEGIN_DECLS
    extern int setjmp __P((jmp_buf env));
    extern void longjmp __P((jmp_buf env, int val));
    
    #ifndef _ANSI_SOURCE
    int sigsetjmp __P((sigjmp_buf env, int val));
    void siglongjmp __P((sigjmp_buf env, int val));
    #endif /* _ANSI_SOURCE  */
    
    #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
    int     _setjmp __P((jmp_buf env));
    void    _longjmp __P((jmp_buf, int val));
    void    longjmperror __P((void));
    #endif /* neither ANSI nor POSIX */
    __END_DECLS
    
    #endif /* !_BSD_PPC_SETJMP_H_ */

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