include/coff/external.h

   1 /* external.h  -- External COFF structures
   2
   3    Copyright 2001 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifndef COFF_EXTERNAL_H
  20 #define COFF_EXTERNAL_H
  21
  22 #ifndef DO_NOT_DEFINE_FILHDR
  23 /********************** FILE HEADER **********************/
  24
  25 struct external_filehdr
  26   {
  27     char f_magic[2];    /* magic number                 */
  28     char f_nscns[2];    /* number of sections           */
  29     char f_timdat[4];   /* time & date stamp            */
  30     char f_symptr[4];   /* file pointer to symtab       */
  31     char f_nsyms[4];    /* number of symtab entries     */
  32     char f_opthdr[2];   /* sizeof(optional hdr)         */
  33     char f_flags[2];    /* flags                        */
  34   };
  35
  36 #define FILHDR  struct external_filehdr
  37 #define FILHSZ  20
  38 #endif
  39
  40 #ifndef DO_NOT_DEFINE_AOUTHDR
  41 /********************** AOUT "OPTIONAL HEADER" **********************/
  42
  43 typedef struct external_aouthdr
  44   {
  45     char magic[2];      /* type of file                         */
  46     char vstamp[2];     /* version stamp                        */
  47     char tsize[4];      /* text size in bytes, padded to FW bdry*/
  48     char dsize[4];      /* initialized data "  "                */
  49     char bsize[4];      /* uninitialized data "   "             */
  50     char entry[4];      /* entry pt.                            */
  51     char text_start[4]; /* base of text used for this file      */
  52     char data_start[4]; /* base of data used for this file      */
  53   }
  54 AOUTHDR;
  55
  56 #define AOUTHDRSZ 28
  57 #define AOUTSZ 28
  58 #endif
  59
  60 #ifndef DO_NOT_DEFINE_SCNHDR
  61 /********************** SECTION HEADER **********************/
  62
  63 struct external_scnhdr
  64   {
  65     char s_name[8];     /* section name                         */
  66     char s_paddr[4];    /* physical address, aliased s_nlib     */
  67     char s_vaddr[4];    /* virtual address                      */
  68     char s_size[4];     /* section size                         */
  69     char s_scnptr[4];   /* file ptr to raw data for section     */
  70     char s_relptr[4];   /* file ptr to relocation               */
  71     char s_lnnoptr[4];  /* file ptr to line numbers             */
  72     char s_nreloc[2];   /* number of relocation entries         */
  73     char s_nlnno[2];    /* number of line number entries        */
  74     char s_flags[4];    /* flags                                */
  75   };
  76
  77 #define SCNHDR  struct external_scnhdr
  78 #define SCNHSZ  40
  79
  80 /* Names of "special" sections.  */
  81
  82 #define _TEXT    ".text"
  83 #define _DATA    ".data"
  84 #define _BSS     ".bss"
  85 #define _COMMENT ".comment"
  86 #define _LIB     ".lib"
  87 #endif /* not DO_NOT_DEFINE_SCNHDR */
  88
  89 #ifndef DO_NOT_DEFINE_LINENO
  90
  91 /********************** LINE NUMBERS **********************/
  92
  93 #ifndef L_LNNO_SIZE
  94 #error  L_LNNO_SIZE needs to be defined
  95 #endif
  96
  97 /* 1 line number entry for every "breakpointable" source line in a section.
  98    Line numbers are grouped on a per function basis; first entry in a function
  99    grouping will have l_lnno = 0 and in place of physical address will be the
 100    symbol table index of the function name.  */
 101 struct external_lineno
 102 {
 103   union
 104   {
 105     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 106     char l_paddr[4];    /* (physical) address of line number    */
 107   } l_addr;
 108
 109   char l_lnno[L_LNNO_SIZE];     /* line number          */
 110 };
 111
 112 #define LINENO  struct external_lineno
 113 #define LINESZ  (4 + L_LNNO_SIZE)
 114
 115 #if L_LNNO_SIZE == 4
 116 #define GET_LINENO_LNNO(abfd, ext)      H_GET_32 (abfd,      (ext->l_lnno))
 117 #define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_32 (abfd, val, (ext->l_lnno))
 118 #endif
 119 #if L_LNNO_SIZE == 2
 120 #define GET_LINENO_LNNO(abfd, ext)      H_GET_16 (abfd,      (ext->l_lnno))
 121 #define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_16 (abfd, val, (ext->l_lnno))
 122 #endif
 123
 124 #endif /* not DO_NOT_DEFINE_LINENO */
 125
 126 #ifndef DO_NOT_DEFINE_SYMENT
 127 /********************** SYMBOLS **********************/
 128
 129 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 130 #ifndef E_FILNMLEN
 131 #define E_FILNMLEN      14
 132 #endif
 133 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 134
 135 struct external_syment
 136 {
 137   union
 138   {
 139     char e_name[E_SYMNMLEN];
 140
 141     struct
 142     {
 143       char e_zeroes[4];
 144       char e_offset[4];
 145     } e;
 146   } e;
 147
 148   char e_value[4];
 149   char e_scnum[2];
 150   char e_type[2];
 151   char e_sclass[1];
 152   char e_numaux[1];
 153 };
 154
 155 #define SYMENT  struct external_syment
 156 #define SYMESZ  18
 157
 158 #ifndef N_BTMASK
 159 #define N_BTMASK        0xf
 160 #endif
 161
 162 #ifndef N_TMASK
 163 #define N_TMASK         0x30
 164 #endif
 165
 166 #ifndef N_BTSHFT
 167 #define N_BTSHFT        4
 168 #endif
 169
 170 #ifndef N_TSHIFT
 171 #define N_TSHIFT        2
 172 #endif
 173
 174 #endif /* not DO_NOT_DEFINE_SYMENT */
 175
 176 #ifndef DO_NOT_DEFINE_AUXENT
 177
 178 union external_auxent
 179 {
 180   struct
 181   {
 182     char x_tagndx[4];           /* str, un, or enum tag indx */
 183
 184     union
 185     {
 186       struct
 187       {
 188         char  x_lnno[2]; /* declaration line number */
 189         char  x_size[2]; /* str/union/array size */
 190       } x_lnsz;
 191
 192       char x_fsize[4];  /* size of function */
 193
 194     } x_misc;
 195
 196     union
 197     {
 198       struct            /* if ISFCN, tag, or .bb */
 199       {
 200         char x_lnnoptr[4];      /* ptr to fcn line # */
 201         char x_endndx[4];       /* entry ndx past block end */
 202       } x_fcn;
 203
 204       struct            /* if ISARY, up to 4 dimen. */
 205       {
 206         char x_dimen[E_DIMNUM][2];
 207       } x_ary;
 208
 209     } x_fcnary;
 210
 211     char x_tvndx[2];    /* tv index */
 212
 213   } x_sym;
 214
 215   union
 216   {
 217     char x_fname[E_FILNMLEN];
 218
 219     struct
 220     {
 221       char x_zeroes[4];
 222       char x_offset[4];
 223     } x_n;
 224
 225   } x_file;
 226
 227   struct
 228   {
 229     char x_scnlen[4];   /* section length */
 230     char x_nreloc[2];   /* # relocation entries */
 231     char x_nlinno[2];   /* # line numbers */
 232 #ifdef INCLUDE_COMDAT_FIELDS_IN_AUXENT
 233     char x_checksum[4];            /* section COMDAT checksum         */
 234     char x_associated[2];          /* COMDAT associated section index */
 235     char x_comdat[1];              /* COMDAT selection number         */
 236 #endif
 237   } x_scn;
 238
 239   struct
 240   {
 241     char x_tvfill[4];   /* tv fill value */
 242     char x_tvlen[2];    /* length of .tv */
 243     char x_tvran[2][2]; /* tv range */
 244   } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
 245 };
 246
 247 #define AUXENT  union external_auxent
 248 #define AUXESZ  18
 249
 250 #define _ETEXT  "etext"
 251
 252 #endif /* not DO_NOT_DEFINE_AUXENT */
 253
 254 #endif /* COFF_EXTERNAL_H */