FreeBSD/Linux Kernel Cross Reference
sys/sys/imgact_aout.h

     /*-
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 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.
     *
     *      from: @(#)exec.h        8.1 (Berkeley) 6/11/93
     * $FreeBSD: src/sys/sys/imgact_aout.h,v 1.13 1999/12/29 04:24:41 peter Exp $
     * $DragonFly: src/sys/sys/imgact_aout.h,v 1.6 2007/02/03 09:56:04 y0netan1 Exp $
     */
    
    #ifndef _IMGACT_AOUT_H_
    #define _IMGACT_AOUT_H_
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    
    #define N_GETMAGIC(ex) \
            ( (ex).a_midmag & 0xffff )
    #define N_GETMID(ex) \
            ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \
            ((ex).a_midmag >> 16) & 0x03ff )
    #define N_GETFLAG(ex) \
            ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \
            ((ex).a_midmag >> 26) & 0x3f )
    #define N_SETMAGIC(ex,mag,mid,flag) \
            ( (ex).a_midmag = (((flag) & 0x3f) <<26) | (((mid) & 0x03ff) << 16) | \
            ((mag) & 0xffff) )
    
    #define N_GETMAGIC_NET(ex) \
            (ntohl((ex).a_midmag) & 0xffff)
    #define N_GETMID_NET(ex) \
            ((ntohl((ex).a_midmag) >> 16) & 0x03ff)
    #define N_GETFLAG_NET(ex) \
            ((ntohl((ex).a_midmag) >> 26) & 0x3f)
    #define N_SETMAGIC_NET(ex,mag,mid,flag) \
            ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
            (((mag)&0xffff)) ) )
    
    #define N_ALIGN(ex,x) \
            (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC || \
             N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \
             ((x) + __LDPGSZ - 1) & ~(unsigned long)(__LDPGSZ - 1) : (x))
    
    /* Valid magic number check. */
    #define N_BADMAG(ex) \
            (N_GETMAGIC(ex) != OMAGIC && N_GETMAGIC(ex) != NMAGIC && \
             N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC && \
             N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \
             N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC)
    
    
    /* Address of the bottom of the text segment. */
    /*
     * This can not be done right.  Abuse a_entry in some cases to handle kernels.
     */
    #define N_TXTADDR(ex) \
            ((N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC || \
            N_GETMAGIC(ex) == ZMAGIC) ? \
            ((ex).a_entry < (ex).a_text ? 0 : (ex).a_entry & ~__LDPGSZ) : __LDPGSZ)
    
    /* Address of the bottom of the data segment. */
    #define N_DATADDR(ex) \
            N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
    
    /* Text segment offset. */
    #define N_TXTOFF(ex) \
            (N_GETMAGIC(ex) == ZMAGIC ? __LDPGSZ : (N_GETMAGIC(ex) == QMAGIC || \
            N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : sizeof(struct exec))
    
    /* Data segment offset. */
    #define N_DATOFF(ex) \
           N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
   
   /* Relocation table offset. */
   #define N_RELOFF(ex) \
           N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data)
   
   /* Symbol table offset. */
   #define N_SYMOFF(ex) \
           (N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize)
   
   /* String table offset. */
   #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
   
   /*
    * Header prepended to each a.out file.
    * only manipulate the a_midmag field via the
    * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros in a.out.h
    *
    * AOUT_H_FORCE32 is used by btxld and sys/boot when compiling
    * from a 64 bit environment to generate a 32 bit a.out.h header.
    */
   
   #ifdef AOUT_H_FORCE32
   typedef u_int32_t       aout_register_t;
   #else
   typedef unsigned long   aout_register_t;
   #endif
   
   struct exec {
        aout_register_t    a_midmag;       /* flags<<26 | mid<<16 | magic */
        aout_register_t    a_text;         /* text segment size */
        aout_register_t    a_data;         /* initialized data size */
        aout_register_t    a_bss;          /* uninitialized data size */
        aout_register_t    a_syms;         /* symbol table size */
        aout_register_t    a_entry;        /* entry point */
        aout_register_t    a_trsize;       /* text relocation size */
        aout_register_t    a_drsize;       /* data relocation size */
   };
   #define a_magic a_midmag /* XXX Hack to work with current kern_execve.c */
   
   /* a_magic */
   #define OMAGIC          0407    /* old impure format */
   #define NMAGIC          0410    /* read-only text */
   #define ZMAGIC          0413    /* demand load format */
   #define QMAGIC          0314    /* "compact" demand load format */
   
   /* a_mid */
   #define MID_ZERO        0       /* unknown - implementation dependent */
   #define MID_SUN010      1       /* sun 68010/68020 binary */
   #define MID_SUN020      2       /* sun 68020-only binary */
   #define MID_I386        134     /* i386 BSD binary */
   #define MID_SPARC       138     /* sparc */
   #define MID_HP200       200     /* hp200 (68010) BSD binary */
   #define MID_HP300       300     /* hp300 (68020+68881) BSD binary */
   #define MID_HPUX        0x20C   /* hp200/300 HP-UX binary */
   #define MID_HPUX800     0x20B   /* hp800 HP-UX binary */
   
   /*
    * a_flags
    */
   #define EX_PIC          0x10    /* contains position independent code */
   #define EX_DYNAMIC      0x20    /* contains run-time link-edit info */
   #define EX_DPMASK       0x30    /* mask for the above */
   
   #ifdef _KERNEL
   struct proc;
   struct vnode;
   #endif
   
   #endif /* !_IMGACT_AOUT_H_ */

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