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/ibcs2/ibcs2_util.h

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    1 
    2 /*
    3  * Copyright (c) 1994 Christos Zoulas
    4  * Copyright (c) 1995 Frank van der Linden
    5  * Copyright (c) 1995 Scott Bartram
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
   31  * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
   32  *
   33  * $FreeBSD: releng/5.1/sys/i386/ibcs2/ibcs2_util.h 107849 2002-12-14 01:56:26Z alfred $
   34  */
   35 
   36 /*
   37  * This file is pretty much the same as Christos' svr4_util.h
   38  * (for now).
   39  */
   40 
   41 #ifndef _IBCS2_UTIL_H_
   42 #define _IBCS2_UTIL_H_
   43 
   44 /*
   45  * XXX the inlines have obnoxious prerequisites, only some of which are
   46  * included here.
   47  */
   48 #include <vm/vm.h>
   49 #include <vm/pmap.h>
   50 #include <machine/vmparam.h>
   51 #include <sys/exec.h>
   52 #include <sys/sysent.h>
   53 #include <sys/proc.h>
   54 
   55 static __inline caddr_t stackgap_init(void);
   56 static __inline void *stackgap_alloc(caddr_t *, size_t);
   57 
   58 static __inline caddr_t
   59 stackgap_init()
   60 {
   61 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
   62         return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE);
   63 }
   64 
   65 static __inline void *
   66 stackgap_alloc(sgp, sz)
   67         caddr_t *sgp;
   68         size_t   sz;
   69 {
   70         void    *p = (void *) *sgp;
   71         *sgp += ALIGN(sz);
   72         return p;
   73 }
   74 
   75 #ifdef DEBUG_IBCS2
   76 #define DPRINTF(a)      printf a;
   77 #else
   78 #define DPRINTF(a)
   79 #endif
   80 
   81 extern const char ibcs2_emul_path[];
   82 
   83 int ibcs2_emul_find(struct thread *, caddr_t *, const char *, char *,
   84                         char **, int);
   85 
   86 #define CHECKALTEXIST(p, sgp, path) \
   87     ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 0)
   88 
   89 #define CHECKALTCREAT(p, sgp, path) \
   90     ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 1)
   91 
   92 #ifdef SPX_HACK
   93 int spx_open(struct thread *td, void *uap);
   94 #endif
   95 
   96 #endif /* !_IBCS2_UTIL_H_ */

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