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  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      from: @(#)exec.h        8.1 (Berkeley) 6/11/93
   30  * $FreeBSD: releng/8.1/sys/sys/imgact_aout.h 199583 2009-11-20 15:27:52Z jhb $
   31  */
   32 
   33 #ifndef _IMGACT_AOUT_H_
   34 #define _IMGACT_AOUT_H_
   35 
   36 #define N_GETMAGIC(ex) \
   37         ( le32toh((ex).a_midmag) & 0xffff )
   38 #define N_GETMID(ex) \
   39         ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \
   40         ((ex).a_midmag >> 16) & 0x03ff )
   41 #define N_GETFLAG(ex) \
   42         ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \
   43         ((ex).a_midmag >> 26) & 0x3f )
   44 #define N_SETMAGIC(ex,mag,mid,flag) \
   45         ( (ex).a_midmag = htole32((((flag) & 0x3f) <<26) | \
   46         (((mid) & 0x03ff) << 16) | \
   47         ((mag) & 0xffff)) )
   48 
   49 #define N_GETMAGIC_NET(ex) \
   50         (ntohl((ex).a_midmag) & 0xffff)
   51 #define N_GETMID_NET(ex) \
   52         ((ntohl((ex).a_midmag) >> 16) & 0x03ff)
   53 #define N_GETFLAG_NET(ex) \
   54         ((ntohl((ex).a_midmag) >> 26) & 0x3f)
   55 #define N_SETMAGIC_NET(ex,mag,mid,flag) \
   56         ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) \
   57         | (((mag)&0xffff)) ) )
   58 
   59 #define N_ALIGN(ex,x) \
   60         (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC || \
   61          N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \
   62          ((x) + __LDPGSZ - 1) & ~(uint32_t)(__LDPGSZ - 1) : (x))
   63 
   64 /* Valid magic number check. */
   65 #define N_BADMAG(ex) \
   66         (N_GETMAGIC(ex) != OMAGIC && N_GETMAGIC(ex) != NMAGIC && \
   67          N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC && \
   68          N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \
   69          N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC)
   70 
   71 
   72 /* Address of the bottom of the text segment. */
   73 /*
   74  * This can not be done right.  Abuse a_entry in some cases to handle kernels.
   75  */
   76 #define N_TXTADDR(ex) \
   77         ((N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC || \
   78         N_GETMAGIC(ex) == ZMAGIC) ? \
   79         (le32toh((ex).a_entry) < le32toh((ex).a_text) ? 0 : \
   80         le32toh((ex).a_entry) & ~__LDPGSZ) : __LDPGSZ)
   81 
   82 /* Address of the bottom of the data segment. */
   83 #define N_DATADDR(ex) \
   84         N_ALIGN(ex, N_TXTADDR(ex) + le32toh((ex).a_text))
   85 
   86 /* Text segment offset. */
   87 #define N_TXTOFF(ex) \
   88         (N_GETMAGIC(ex) == ZMAGIC ? __LDPGSZ : (N_GETMAGIC(ex) == QMAGIC || \
   89         N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : sizeof(struct exec))
   90 
   91 /* Data segment offset. */
   92 #define N_DATOFF(ex) \
   93         N_ALIGN(ex, N_TXTOFF(ex) + le32toh((ex).a_text))
   94 
   95 /* Relocation table offset. */
   96 #define N_RELOFF(ex) \
   97         N_ALIGN(ex, N_DATOFF(ex) + le32toh((ex).a_data))
   98 
   99 /* Symbol table offset. */
  100 #define N_SYMOFF(ex) \
  101         (N_RELOFF(ex) + le32toh((ex).a_trsize) + le32toh((ex).a_drsize))
  102 
  103 /* String table offset. */
  104 #define N_STROFF(ex)    (N_SYMOFF(ex) + le32toh((ex).a_syms))
  105 
  106 /*
  107  * Header prepended to each a.out file.
  108  * Only manipulate the a_midmag field via the
  109  * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros.
  110  */
  111 
  112 struct exec {
  113      uint32_t   a_midmag;       /* flags<<26 | mid<<16 | magic */
  114      uint32_t   a_text;         /* text segment size */
  115      uint32_t   a_data;         /* initialized data size */
  116      uint32_t   a_bss;          /* uninitialized data size */
  117      uint32_t   a_syms;         /* symbol table size */
  118      uint32_t   a_entry;        /* entry point */
  119      uint32_t   a_trsize;       /* text relocation size */
  120      uint32_t   a_drsize;       /* data relocation size */
  121 };
  122 #define a_magic a_midmag /* XXX Hack to work with current kern_execve.c */
  123 
  124 /* a_magic */
  125 #define OMAGIC          0407    /* old impure format */
  126 #define NMAGIC          0410    /* read-only text */
  127 #define ZMAGIC          0413    /* demand load format */
  128 #define QMAGIC          0314    /* "compact" demand load format */
  129 
  130 /* a_mid */
  131 #define MID_ZERO        0       /* unknown - implementation dependent */
  132 #define MID_SUN010      1       /* sun 68010/68020 binary */
  133 #define MID_SUN020      2       /* sun 68020-only binary */
  134 #define MID_I386        134     /* i386 BSD binary */
  135 #define MID_SPARC       138     /* sparc */
  136 #define MID_ARM6        143     /* ARM6 */
  137 #define MID_HP200       200     /* hp200 (68010) BSD binary */
  138 #define MID_HP300       300     /* hp300 (68020+68881) BSD binary */
  139 #define MID_HPUX        0x20C   /* hp200/300 HP-UX binary */
  140 #define MID_HPUX800     0x20B   /* hp800 HP-UX binary */
  141 
  142 /*
  143  * a_flags
  144  */
  145 #define EX_PIC          0x10    /* contains position independent code */
  146 #define EX_DYNAMIC      0x20    /* contains run-time link-edit info */
  147 #define EX_DPMASK       0x30    /* mask for the above */
  148 
  149 #ifdef _KERNEL
  150 struct thread;
  151 struct vnode;
  152 
  153 int     aout_coredump(struct thread *td, struct vnode *vp, off_t limit);
  154 #endif
  155 
  156 #endif /* !_IMGACT_AOUT_H_ */

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