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Annotation of Gnu-Mach/i386/include/mach/setjmp.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1993 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  * Setjmp/longjmp buffer for i386.
        !            28:  */
        !            29: #ifndef _MACH_SETJMP_H_PROCESSED_
        !            30: #define _MACH_SETJMP_H_PROCESSED_ 1
        !            31: 
        !            32: /* XXX prefix these with mach_ so they don't interfere with higher layers?
        !            33:    This stuff is included by cthreads.h.  */
        !            34: 
        !            35: /* XXX The original definition of jmp_buf[] causes problems using
        !            36:  * libthreads when linked against NetBSD and FreeBSD's libc because
        !            37:  * it's too small.  When cthreads calls _setjmp, it gets the libc
        !            38:  * version which saves more state than it's expecting and overwrites
        !            39:  * important cthread data. =( This definition is big enough for all
        !            40:  * known systems so far (Linux's is 6, FreeBSD's is 9 and NetBSD's is
        !            41:  * 10).  This file really shouldn't even be here, since we should be
        !            42:  * using libc's setjmp.h.  
        !            43:  */
        !            44: #if 0
        !            45: #define _JBLEN 6
        !            46: #else
        !            47: #define _JBLEN 10
        !            48: #endif
        !            49: 
        !            50: typedef int jmp_buf[_JBLEN];           /* ebx, esi, edi, ebp, esp, eip */
        !            51: 
        !            52: 
        !            53: extern int setjmp (jmp_buf);
        !            54: extern void longjmp (jmp_buf, int);
        !            55: extern int _setjmp (jmp_buf);
        !            56: extern void _longjmp (jmp_buf, int);
        !            57: 
        !            58: #endif /* _MACH_SETJMP_H_PROCESSED_ */

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