The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/exec_aout.h

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    1 /*      $NetBSD: exec_aout.h,v 1.33 2004/02/11 01:03:35 matt Exp $      */
    2 
    3 /*
    4  * Copyright (c) 1993, 1994 Christopher G. Demetriou
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Christopher G. Demetriou.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #ifndef _SYS_EXEC_AOUT_H_
   34 #define _SYS_EXEC_AOUT_H_
   35 
   36 #ifndef N_PAGSIZ
   37 #define N_PAGSIZ(ex)    (AOUT_LDPGSZ)
   38 #endif
   39 
   40 /*
   41  * Header prepended to each a.out file.
   42  * only manipulate the a_midmag field via the
   43  * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
   44  */
   45 struct exec {
   46         u_long  a_midmag;       /* htonl(flags<<26 | mid<<16 | magic) */
   47         u_long  a_text;         /* text segment size */
   48         u_long  a_data;         /* initialized data size */
   49         u_long  a_bss;          /* uninitialized data size */
   50         u_long  a_syms;         /* symbol table size */
   51         u_long  a_entry;        /* entry point */
   52         u_long  a_trsize;       /* text relocation size */
   53         u_long  a_drsize;       /* data relocation size */
   54 };
   55 
   56 /* a_magic */
   57 #define OMAGIC          0407    /* old impure format */
   58 #define NMAGIC          0410    /* read-only text */
   59 #define ZMAGIC          0413    /* demand load format */
   60 #define QMAGIC          0314    /* "compact" demand load format; deprecated */
   61 
   62 /*
   63  * a_mid - keep sorted in numerical order for sanity's sake
   64  * ensure that: 0 < mid < 0x3ff
   65  */
   66 #define MID_ZERO        0       /* unknown - implementation dependent */
   67 #define MID_SUN010      1       /* sun 68010/68020 binary */
   68 #define MID_SUN020      2       /* sun 68020-only binary */
   69 #define MID_PC386       100     /* 386 PC binary. (so quoth BFD) */
   70 #define MID_HP200       200     /* hp200 (68010) BSD binary */
   71 #define MID_I386        134     /* i386 BSD binary */
   72 #define MID_M68K        135     /* m68k BSD binary with 8K page sizes */
   73 #define MID_M68K4K      136     /* m68k BSD binary with 4K page sizes */
   74 #define MID_NS32532     137     /* ns32532 */
   75 #define MID_SPARC       138     /* sparc */
   76 #define MID_PMAX        139     /* pmax */
   77 #define MID_VAX1K       140     /* VAX 1K page size binaries */
   78 #define MID_ALPHA       141     /* Alpha BSD binary */
   79 #define MID_MIPS        142     /* big-endian MIPS */
   80 #define MID_ARM6        143     /* ARM6 */
   81 #define MID_M680002K    144     /* m68000 with 2K page sizes */
   82 #define MID_SH3         145     /* SH3 */
   83 #define MID_POWERPC     149     /* big-endian PowerPC */
   84 #define MID_VAX         150     /* VAX */
   85                                 /* 151 - MIPS1 */
   86                                 /* 152 - MIPS2 */
   87 #define MID_M88K        153     /* m88k BSD */
   88 #define MID_HPPA        154     /* HP PARISC */
   89 #define MID_SH5_64      155     /* LP64 SH5 */
   90 #define MID_SPARC64     156     /* LP64 sparc */
   91 #define MID_X86_64      157     /* AMD x86-64 */
   92 #define MID_SH5_32      158     /* ILP32 SH5 */
   93 #define MID_HP200       200     /* hp200 (68010) BSD binary */
   94 #define MID_HP300       300     /* hp300 (68020+68881) BSD binary */
   95 #define MID_HPUX        0x20C   /* hp200/300 HP-UX binary */
   96 #define MID_HPUX800     0x20B   /* hp800 HP-UX binary */
   97 
   98 /*
   99  * a_flags
  100  */
  101 #define EX_DYNAMIC      0x20
  102 #define EX_PIC          0x10
  103 #define EX_DPMASK       0x30
  104 /*
  105  * Interpretation of the (a_flags & EX_DPMASK) bits:
  106  *
  107  *      00              traditional executable or object file
  108  *      01              object file contains PIC code (set by `as -k')
  109  *      10              dynamic executable
  110  *      11              position independent executable image
  111  *                      (eg. a shared library)
  112  *
  113  */
  114 
  115 /*
  116  * The a.out structure's a_midmag field is a network-byteorder encoding
  117  * of this int
  118  *      FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
  119  * Where `F' is 6 bits of flag like EX_DYNAMIC,
  120  *       `m' is 10 bits of machine-id like MID_I386, and
  121  *       `M' is 16 bits worth of magic number, ie. ZMAGIC.
  122  * The macros below will set/get the needed fields.
  123  */
  124 #define N_GETMAGIC(ex) \
  125     ((((ex).a_midmag)&0xffff0000) ? \
  126     (ntohl((u_int32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag))
  127 #define N_GETMAGIC2(ex) \
  128     ((((ex).a_midmag)&0xffff0000) ? \
  129     (ntohl((u_int32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000))
  130 #define N_GETMID(ex) \
  131     ((((ex).a_midmag)&0xffff0000) ? \
  132     ((ntohl((u_int32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO)
  133 #define N_GETFLAG(ex) \
  134     ((((ex).a_midmag)&0xffff0000) ? \
  135     ((ntohl((u_int32_t)((ex).a_midmag))>>26)&0x3f) : 0)
  136 #define N_SETMAGIC(ex,mag,mid,flag) \
  137     ((ex).a_midmag = htonl((u_int32_t) \
  138     ((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff)))))
  139 
  140 #define N_ALIGN(ex,x) \
  141         (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
  142         ((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x))
  143 
  144 /* Valid magic number check. */
  145 #define N_BADMAG(ex) \
  146         (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
  147         N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
  148 
  149 /* Address of the bottom of the text segment. */
  150 #define N_TXTADDR(ex)   (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ)
  151 
  152 /* Address of the bottom of the data segment. */
  153 #define N_DATADDR(ex) \
  154         (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
  155         (N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1))
  156 
  157 /* Address of the bottom of the bss segment. */
  158 #define N_BSSADDR(ex) \
  159         (N_DATADDR(ex) + (ex).a_data)
  160 
  161 /* Text segment offset. */
  162 #define N_TXTOFF(ex) \
  163         ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
  164         0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \
  165         sizeof(struct exec)) )
  166 
  167 /* Data segment offset. */
  168 #define N_DATOFF(ex) \
  169         N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
  170 
  171 /* Text relocation table offset. */
  172 #define N_TRELOFF(ex) \
  173         (N_DATOFF(ex) + (ex).a_data)
  174 
  175 /* Data relocation table offset. */
  176 #define N_DRELOFF(ex) \
  177         (N_TRELOFF(ex) + (ex).a_trsize)
  178 
  179 /* Symbol table offset. */
  180 #define N_SYMOFF(ex) \
  181         (N_DRELOFF(ex) + (ex).a_drsize)
  182 
  183 /* String table offset. */
  184 #define N_STROFF(ex) \
  185         (N_SYMOFF(ex) + (ex).a_syms)
  186 
  187 #include <machine/aout_machdep.h>
  188 
  189 #ifdef _KERNEL
  190 
  191 /* the "a.out" format's entry in the exec switch */
  192 int     exec_aout_makecmds __P((struct proc *, struct exec_package *));
  193 
  194 /* functions which prepare various a.out executable types */
  195 /*
  196  * MI portion
  197  */
  198 int     exec_aout_prep_zmagic __P((struct proc *, struct exec_package *));
  199 int     exec_aout_prep_nmagic __P((struct proc *, struct exec_package *));
  200 int     exec_aout_prep_omagic __P((struct proc *, struct exec_package *));
  201 
  202 /* For compatibility modules */
  203 int     exec_aout_prep_oldzmagic __P((struct proc *, struct exec_package *));
  204 int     exec_aout_prep_oldnmagic __P((struct proc *, struct exec_package *));
  205 int     exec_aout_prep_oldomagic __P((struct proc *, struct exec_package *));
  206 
  207 /*
  208  * MD portion
  209  */
  210 int     cpu_exec_aout_makecmds __P((struct proc *, struct exec_package *));
  211 
  212 #endif /* _KERNEL */
  213 
  214 #endif /* !_SYS_EXEC_AOUT_H_ */

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