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/sys/imgact_aout.h

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    1 /*-
    2  * Copyright (c) 1992, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      from: @(#)exec.h        8.1 (Berkeley) 6/11/93
   34  * $FreeBSD: releng/5.1/sys/sys/imgact_aout.h 102952 2002-09-05 07:54:03Z bde $
   35  */
   36 
   37 #ifndef _IMGACT_AOUT_H_
   38 #define _IMGACT_AOUT_H_
   39 
   40 #define N_GETMAGIC(ex) \
   41         ( (ex).a_midmag & 0xffff )
   42 #define N_GETMID(ex) \
   43         ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \
   44         ((ex).a_midmag >> 16) & 0x03ff )
   45 #define N_GETFLAG(ex) \
   46         ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \
   47         ((ex).a_midmag >> 26) & 0x3f )
   48 #define N_SETMAGIC(ex,mag,mid,flag) \
   49         ( (ex).a_midmag = (((flag) & 0x3f) <<26) | (((mid) & 0x03ff) << 16) | \
   50         ((mag) & 0xffff) )
   51 
   52 #define N_GETMAGIC_NET(ex) \
   53         (ntohl((ex).a_midmag) & 0xffff)
   54 #define N_GETMID_NET(ex) \
   55         ((ntohl((ex).a_midmag) >> 16) & 0x03ff)
   56 #define N_GETFLAG_NET(ex) \
   57         ((ntohl((ex).a_midmag) >> 26) & 0x3f)
   58 #define N_SETMAGIC_NET(ex,mag,mid,flag) \
   59         ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) \
   60         | (((mag)&0xffff)) ) )
   61 
   62 #define N_ALIGN(ex,x) \
   63         (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC || \
   64          N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \
   65          ((x) + __LDPGSZ - 1) & ~(unsigned long)(__LDPGSZ - 1) : (x))
   66 
   67 /* Valid magic number check. */
   68 #define N_BADMAG(ex) \
   69         (N_GETMAGIC(ex) != OMAGIC && N_GETMAGIC(ex) != NMAGIC && \
   70          N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC && \
   71          N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \
   72          N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC)
   73 
   74 
   75 /* Address of the bottom of the text segment. */
   76 /*
   77  * This can not be done right.  Abuse a_entry in some cases to handle kernels.
   78  */
   79 #define N_TXTADDR(ex) \
   80         ((N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC || \
   81         N_GETMAGIC(ex) == ZMAGIC) ? \
   82         ((ex).a_entry < (ex).a_text ? 0 : (ex).a_entry & ~__LDPGSZ) : __LDPGSZ)
   83 
   84 /* Address of the bottom of the data segment. */
   85 #define N_DATADDR(ex) \
   86         N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
   87 
   88 /* Text segment offset. */
   89 #define N_TXTOFF(ex) \
   90         (N_GETMAGIC(ex) == ZMAGIC ? __LDPGSZ : (N_GETMAGIC(ex) == QMAGIC || \
   91         N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : sizeof(struct exec))
   92 
   93 /* Data segment offset. */
   94 #define N_DATOFF(ex) \
   95         N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
   96 
   97 /* Relocation table offset. */
   98 #define N_RELOFF(ex) \
   99         N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data)
  100 
  101 /* Symbol table offset. */
  102 #define N_SYMOFF(ex) \
  103         (N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize)
  104 
  105 /* String table offset. */
  106 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
  107 
  108 /*
  109  * Header prepended to each a.out file.
  110  * only manipulate the a_midmag field via the
  111  * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros in a.out.h
  112  */
  113 
  114 struct exec {
  115      unsigned long      a_midmag;       /* flags<<26 | mid<<16 | magic */
  116      unsigned long      a_text;         /* text segment size */
  117      unsigned long      a_data;         /* initialized data size */
  118      unsigned long      a_bss;          /* uninitialized data size */
  119      unsigned long      a_syms;         /* symbol table size */
  120      unsigned long      a_entry;        /* entry point */
  121      unsigned long      a_trsize;       /* text relocation size */
  122      unsigned long      a_drsize;       /* data relocation size */
  123 };
  124 #define a_magic a_midmag /* XXX Hack to work with current kern_execve.c */
  125 
  126 /* a_magic */
  127 #define OMAGIC          0407    /* old impure format */
  128 #define NMAGIC          0410    /* read-only text */
  129 #define ZMAGIC          0413    /* demand load format */
  130 #define QMAGIC          0314    /* "compact" demand load format */
  131 
  132 /* a_mid */
  133 #define MID_ZERO        0       /* unknown - implementation dependent */
  134 #define MID_SUN010      1       /* sun 68010/68020 binary */
  135 #define MID_SUN020      2       /* sun 68020-only binary */
  136 #define MID_I386        134     /* i386 BSD binary */
  137 #define MID_SPARC       138     /* sparc */
  138 #define MID_HP200       200     /* hp200 (68010) BSD binary */
  139 #define MID_HP300       300     /* hp300 (68020+68881) BSD binary */
  140 #define MID_HPUX        0x20C   /* hp200/300 HP-UX binary */
  141 #define MID_HPUX800     0x20B   /* hp800 HP-UX binary */
  142 
  143 /*
  144  * a_flags
  145  */
  146 #define EX_PIC          0x10    /* contains position independent code */
  147 #define EX_DYNAMIC      0x20    /* contains run-time link-edit info */
  148 #define EX_DPMASK       0x30    /* mask for the above */
  149 
  150 #ifdef _KERNEL
  151 struct thread;
  152 struct vnode;
  153 
  154 int     aout_coredump(struct thread *td, struct vnode *vp, off_t limit);
  155 #endif
  156 
  157 #endif /* !_IMGACT_AOUT_H_ */

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