include/coff/external.h

   1 /* external.h  -- External COFF structures
   2
   3    Copyright (C) 2001-2021 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 3 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,
  18    MA 02110-1301, USA.  */
  19
  20 #ifndef COFF_EXTERNAL_H
  21 #define COFF_EXTERNAL_H
  22
  23 #ifndef DO_NOT_DEFINE_FILHDR
  24 /********************** FILE HEADER **********************/
  25
  26 struct external_filehdr
  27   {
  28     char f_magic[2];    /* magic number                 */
  29     char f_nscns[2];    /* number of sections           */
  30     char f_timdat[4];   /* time & date stamp            */
  31     char f_symptr[4];   /* file pointer to symtab       */
  32     char f_nsyms[4];    /* number of symtab entries     */
  33     char f_opthdr[2];   /* sizeof(optional hdr)         */
  34     char f_flags[2];    /* flags                        */
  35   };
  36
  37 #define FILHDR  struct external_filehdr
  38 #define FILHSZ  20
  39 #endif
  40
  41 #ifndef DO_NOT_DEFINE_AOUTHDR
  42 /********************** AOUT "OPTIONAL HEADER" **********************/
  43
  44 typedef struct external_aouthdr
  45   {
  46     char magic[2];      /* type of file                         */
  47     char vstamp[2];     /* version stamp                        */
  48     char tsize[4];      /* text size in bytes, padded to FW bdry*/
  49     char dsize[4];      /* initialized data "  "                */
  50     char bsize[4];      /* uninitialized data "   "             */
  51     char entry[4];      /* entry pt.                            */
  52     char text_start[4]; /* base of text used for this file      */
  53     char data_start[4]; /* base of data used for this file      */
  54   } ATTRIBUTE_PACKED
  55 AOUTHDR;
  56
  57 #define AOUTHDRSZ 28
  58 #define AOUTSZ 28
  59
  60 typedef struct external_aouthdr64
  61 {
  62   char magic[2];        /* Type of file.                        */
  63   char vstamp[2];       /* Version stamp.                       */
  64   char tsize[4];        /* Text size in bytes, padded to FW bdry*/
  65   char dsize[4];        /* Initialized data "  ".               */
  66   char bsize[4];        /* Uninitialized data "   ".            */
  67   char entry[4];        /* Entry pt.                            */
  68   char text_start[4];   /* Base of text used for this file.     */
  69 }
  70 AOUTHDR64;
  71 #define AOUTHDRSZ64     24
  72
  73 #endif /* not DO_NOT_DEFINE_AOUTHDR */
  74
  75 #ifndef DO_NOT_DEFINE_SCNHDR
  76 /********************** SECTION HEADER **********************/
  77
  78 struct external_scnhdr
  79   {
  80     char s_name[8];     /* section name                         */
  81     char s_paddr[4];    /* physical address, aliased s_nlib     */
  82     char s_vaddr[4];    /* virtual address                      */
  83     char s_size[4];     /* section size                         */
  84     char s_scnptr[4];   /* file ptr to raw data for section     */
  85     char s_relptr[4];   /* file ptr to relocation               */
  86     char s_lnnoptr[4];  /* file ptr to line numbers             */
  87     char s_nreloc[2];   /* number of relocation entries         */
  88     char s_nlnno[2];    /* number of line number entries        */
  89     char s_flags[4];    /* flags                                */
  90   };
  91
  92 #define SCNHDR  struct external_scnhdr
  93 #define SCNHSZ  40
  94
  95 /* Names of "special" sections.  */
  96
  97 #define _TEXT    ".text"
  98 #define _DATA    ".data"
  99 #define _BSS     ".bss"
 100 #define _COMMENT ".comment"
 101 #define _LIB     ".lib"
 102 #endif /* not DO_NOT_DEFINE_SCNHDR */
 103
 104 #ifndef DO_NOT_DEFINE_LINENO
 105
 106 /********************** LINE NUMBERS **********************/
 107
 108 #ifndef L_LNNO_SIZE
 109 #error  L_LNNO_SIZE needs to be defined
 110 #endif
 111
 112 /* 1 line number entry for every "breakpointable" source line in a section.
 113    Line numbers are grouped on a per function basis; first entry in a function
 114    grouping will have l_lnno = 0 and in place of physical address will be the
 115    symbol table index of the function name.  */
 116 struct external_lineno
 117 {
 118   union
 119   {
 120     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 121     char l_paddr[4];    /* (physical) address of line number    */
 122   } l_addr;
 123
 124   char l_lnno[L_LNNO_SIZE];     /* line number          */
 125 };
 126
 127 #define LINENO  struct external_lineno
 128 #define LINESZ  (4 + L_LNNO_SIZE)
 129
 130 #if L_LNNO_SIZE == 4
 131 #define GET_LINENO_LNNO(abfd, ext)      H_GET_32 (abfd,      (ext->l_lnno))
 132 #define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_32 (abfd, val, (ext->l_lnno))
 133 #endif
 134 #if L_LNNO_SIZE == 2
 135 #define GET_LINENO_LNNO(abfd, ext)      H_GET_16 (abfd,      (ext->l_lnno))
 136 #define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_16 (abfd, val, (ext->l_lnno))
 137 #endif
 138
 139 #endif /* not DO_NOT_DEFINE_LINENO */
 140
 141 #ifndef DO_NOT_DEFINE_SYMENT
 142 /********************** SYMBOLS **********************/
 143
 144 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 145 #ifndef E_FILNMLEN
 146 #define E_FILNMLEN      14
 147 #endif
 148 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 149
 150 struct external_syment
 151 {
 152   union
 153   {
 154     char e_name[E_SYMNMLEN];
 155
 156     struct
 157     {
 158       char e_zeroes[4];
 159       char e_offset[4];
 160     } e;
 161   } e;
 162
 163   char e_value[4];
 164   char e_scnum[2];
 165   char e_type[2];
 166   char e_sclass[1];
 167   char e_numaux[1];
 168 } ATTRIBUTE_PACKED ;
 169
 170 #define SYMENT  struct external_syment
 171 #define SYMESZ  18
 172
 173 #ifndef N_BTMASK
 174 #define N_BTMASK        0xf
 175 #endif
 176
 177 #ifndef N_TMASK
 178 #define N_TMASK         0x30
 179 #endif
 180
 181 #ifndef N_BTSHFT
 182 #define N_BTSHFT        4
 183 #endif
 184
 185 #ifndef N_TSHIFT
 186 #define N_TSHIFT        2
 187 #endif
 188
 189 #endif /* not DO_NOT_DEFINE_SYMENT */
 190
 191 #ifndef DO_NOT_DEFINE_AUXENT
 192
 193 union external_auxent
 194 {
 195   struct
 196   {
 197     char x_tagndx[4];           /* str, un, or enum tag indx */
 198
 199     union
 200     {
 201       struct
 202       {
 203         char  x_lnno[2]; /* declaration line number */
 204         char  x_size[2]; /* str/union/array size */
 205       } x_lnsz;
 206
 207       char x_fsize[4];  /* size of function */
 208
 209     } x_misc;
 210
 211     union
 212     {
 213       struct            /* if ISFCN, tag, or .bb */
 214       {
 215         char x_lnnoptr[4];      /* ptr to fcn line # */
 216         char x_endndx[4];       /* entry ndx past block end */
 217       } x_fcn;
 218
 219       struct            /* if ISARY, up to 4 dimen. */
 220       {
 221         char x_dimen[E_DIMNUM][2];
 222       } x_ary;
 223
 224     } x_fcnary;
 225
 226     char x_tvndx[2];    /* tv index */
 227
 228   } x_sym;
 229
 230   union
 231   {
 232     char x_fname[E_FILNMLEN];
 233
 234     struct
 235     {
 236       char x_zeroes[4];
 237       char x_offset[4];
 238     } x_n;
 239
 240   } x_file;
 241
 242   struct
 243   {
 244     char x_scnlen[4];   /* section length */
 245     char x_nreloc[2];   /* # relocation entries */
 246     char x_nlinno[2];   /* # line numbers */
 247 #ifdef INCLUDE_COMDAT_FIELDS_IN_AUXENT
 248     char x_checksum[4];            /* section COMDAT checksum         */
 249     char x_associated[2];          /* COMDAT associated section index */
 250     char x_comdat[1];              /* COMDAT selection number         */
 251 #endif
 252   } x_scn;
 253
 254   struct
 255   {
 256     char x_tvfill[4];   /* tv fill value */
 257     char x_tvlen[2];    /* length of .tv */
 258     char x_tvran[2][2]; /* tv range */
 259   } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
 260 } ATTRIBUTE_PACKED ;
 261
 262 #define AUXENT  union external_auxent
 263 #define AUXESZ  18
 264
 265 #define _ETEXT  "etext"
 266
 267 #endif /* not DO_NOT_DEFINE_AUXENT */
 268
 269 #endif /* COFF_EXTERNAL_H */