usr/src/lib/libbc/inc/include/sun4/a.out.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #ifndef _sparc_a_out_h
  30 #define _sparc_a_out_h
  31
  32 #include <sys/exec.h>
  33
  34 /*
  35  * memory management parameters
  36  */
  37
  38 #define PAGSIZ          0x02000
  39 #define SEGSIZ          PAGSIZ
  40 #define OLD_PAGSIZ      0x00800 /*  Page   size under Release 2.0 */
  41 #define OLD_SEGSIZ      0x08000 /* Segment size under Release 2.0 */
  42
  43 /*
  44  * returns 1 if an object file type is invalid, i.e., if the other macros
  45  * defined below will not yield the correct offsets.  Note that a file may
  46  * have N_BADMAG(x) = 0 and may be fully linked, but still may not be
  47  * executable.
  48  */
  49
  50 #define N_BADMAG(x) \
  51         ((x).a_magic!=OMAGIC && (x).a_magic!=NMAGIC && (x).a_magic!=ZMAGIC)
  52
  53 /*
  54  * relocation parameters. These are architecture-dependent
  55  * and can be deduced from the machine type.  They are used
  56  * to calculate offsets of segments within the object file;
  57  * See N_TXTOFF(x), etc. below.
  58  */
  59
  60 #define N_PAGSIZ(x) \
  61         ((x).a_machtype == M_OLDSUN2? OLD_PAGSIZ : PAGSIZ)
  62 #define N_SEGSIZ(x) \
  63         ((x).a_machtype == M_OLDSUN2? OLD_SEGSIZ : SEGSIZ)
  64
  65 /*
  66  * offsets of various sections of an object file.
  67  */
  68
  69 #define N_TXTOFF(x) \
  70         /* text segment */ \
  71         ( (x).a_machtype == M_OLDSUN2 \
  72         ? ((x).a_magic==ZMAGIC ? N_PAGSIZ(x) : sizeof (struct exec)) \
  73         : ((x).a_magic==ZMAGIC ? 0 : sizeof (struct exec)) )
  74
  75 #define N_DATOFF(x)   /* data segment */        \
  76         (N_TXTOFF(x) + (x).a_text)
  77
  78 #define N_TRELOFF(x)  /* text reloc'n */        \
  79         (N_DATOFF(x) + (x).a_data)
  80
  81 #define N_DRELOFF(x) /* data relocation*/       \
  82         (N_TRELOFF(x) + (x).a_trsize)
  83
  84 #define N_SYMOFF(x) \
  85         /* symbol table */ \
  86         (N_TXTOFF(x)+(x).a_text+(x).a_data+(x).a_trsize+(x).a_drsize)
  87
  88 #define N_STROFF(x) \
  89         /* string table */ \
  90         (N_SYMOFF(x) + (x).a_syms)
  91
  92 /*
  93  * Macros which take exec structures as arguments and tell where the
  94  * various pieces will be loaded.
  95  */
  96
  97 #define _N_BASEADDR(x) \
  98         (((x).a_magic == ZMAGIC) && ((x).a_entry < N_PAGSIZ(x)) ? \
  99             0 : N_PAGSIZ(x))
 100
 101 #define N_TXTADDR(x) \
 102         ((x).a_machtype == M_OLDSUN2 ? N_SEGSIZ(x) : _N_BASEADDR(x))
 103
 104 #define N_DATADDR(x) \
 105         (((x).a_magic==OMAGIC)? (N_TXTADDR(x)+(x).a_text) \
 106         : (N_SEGSIZ(x)+((N_TXTADDR(x)+(x).a_text-1) & ~(N_SEGSIZ(x)-1))))
 107
 108 #define N_BSSADDR(x)  (N_DATADDR(x)+(x).a_data)
 109
 110 /*
 111  * Format of a relocation datum.
 112  */
 113
 114 /*
 115  * Sparc relocation types
 116  */
 117
 118 enum reloc_type
 119 {
 120         RELOC_8,        RELOC_16,       RELOC_32,       /* simplest relocs    */
 121         RELOC_DISP8,    RELOC_DISP16,   RELOC_DISP32,   /* Disp's (pc-rel)    */
 122         RELOC_WDISP30,  RELOC_WDISP22,                  /* SR word disp's     */
 123         RELOC_HI22,     RELOC_22,                       /* SR 22-bit relocs   */
 124         RELOC_13,       RELOC_LO10,                     /* SR 13&10-bit relocs*/
 125         RELOC_SFA_BASE, RELOC_SFA_OFF13,                /* SR S.F.A. relocs   */
 126         RELOC_BASE10,   RELOC_BASE13,   RELOC_BASE22,   /* base_relative pic */
 127         RELOC_PC10,     RELOC_PC22,                     /* special pc-rel pic*/
 128         RELOC_JMP_TBL,                                  /* jmp_tbl_rel in pic */
 129         RELOC_SEGOFF16,                                 /* ShLib offset-in-seg*/
 130         RELOC_GLOB_DAT, RELOC_JMP_SLOT, RELOC_RELATIVE, /* rtld relocs        */
 131 };
 132
 133 /*
 134  * Format of a relocation datum.
 135  */
 136
 137 struct reloc_info_sparc /* used when header.a_machtype == M_SPARC */
 138 {
 139         unsigned long int r_address;    /* relocation addr (offset in segment)*/
 140         unsigned int    r_index   :24;  /* segment index or symbol index      */
 141         unsigned int    r_extern  : 1;  /* if F, r_index==SEG#; if T, SYM idx */
 142         int                       : 2;  /* <unused>                           */
 143         enum reloc_type r_type    : 5;  /* type of relocation to perform      */
 144         long int        r_addend;       /* addend for relocation value        */
 145 };
 146
 147
 148
 149 /*
 150  * Format of a symbol table entry
 151  */
 152 struct  nlist {
 153         union {
 154                 char    *n_name;        /* for use when in-core */
 155                 long    n_strx;         /* index into file string table */
 156         } n_un;
 157         unsigned char   n_type;         /* type flag (N_TEXT,..)  */
 158         char    n_other;                /* unused */
 159         short   n_desc;                 /* see <stab.h> */
 160         unsigned long   n_value;        /* value of symbol (or sdb offset) */
 161 };
 162
 163 /*
 164  * Simple values for n_type.
 165  */
 166 #define N_UNDF  0x0             /* undefined */
 167 #define N_ABS   0x2             /* absolute */
 168 #define N_TEXT  0x4             /* text */
 169 #define N_DATA  0x6             /* data */
 170 #define N_BSS   0x8             /* bss */
 171 #define N_COMM  0x12            /* common (internal to ld) */
 172 #define N_FN    0x1e            /* file name symbol */
 173
 174 #define N_EXT   01              /* external bit, or'ed in */
 175 #define N_TYPE  0x1e            /* mask for all the type bits */
 176
 177 /*
 178  * Dbx entries have some of the N_STAB bits set.
 179  * These are given in <stab.h>
 180  */
 181 #define N_STAB  0xe0            /* if any of these bits set, a dbx symbol */
 182
 183 /*
 184  * Format for namelist values.
 185  */
 186 #define N_FORMAT        "%08x"
 187
 188 /*
 189  * secondary sections.
 190  * this stuff follows the string table.
 191  * not even its presence or absence is noted in the
 192  * exec header (?). the secondary header gives
 193  * the number of sections. following it is an
 194  * array of "extra_nsects" int's which give the
 195  * sizeof of the individual sections. the presence of
 196  * even the header is optional.
 197  */
 198
 199 #define EXTRA_MAGIC     1040            /* taxing concept  */
 200 #define EXTRA_IDENT     0               /* ident's in 0th extra section */
 201
 202 struct extra_sections {
 203                 int     extra_magic;            /* should be EXTRA_MAGIC */
 204                 int     extra_nsects;           /* number of extra sections */
 205 };
 206
 207 #endif /*!_sparc_a_out_h*/