include/coff-i386.h

   1 /*** coff information for M68K */
   2
   3
   4 /********************** FILE HEADER **********************/
   5
   6 struct external_filehdr {
   7         char f_magic[2];        /* magic number                 */
   8         char f_nscns[2];        /* number of sections           */
   9         char f_timdat[4];       /* time & date stamp            */
  10         char f_symptr[4];       /* file pointer to symtab       */
  11         char f_nsyms[4];        /* number of symtab entries     */
  12         char f_opthdr[2];       /* sizeof(optional hdr)         */
  13         char f_flags[2];        /* flags                        */
  14 };
  15
  16 struct internal_filehdr
  17 {
  18   unsigned short        f_magic; /* magic number                        */
  19   unsigned short        f_nscns; /* number of sections          */
  20   long          f_timdat;        /* time & date stamp           */
  21   long          f_symptr;        /* file pointer to symtab      */
  22   long          f_nsyms;         /* number of symtab entries    */
  23   unsigned short        f_opthdr; /* sizeof(optional hdr)               */
  24   unsigned short        f_flags;  /* flags                      */
  25 };
  26
  27 /* Bits for f_flags:
  28  *      F_RELFLG        relocation info stripped from file
  29  *      F_EXEC          file is executable (no unresolved external references)
  30  *      F_LNNO          line numbers stripped from file
  31  *      F_LSYMS         local symbols stripped from file
  32  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  33  */
  34
  35 #define F_RELFLG        (0x0001)
  36 #define F_EXEC          (0x0002)
  37 #define F_LNNO          (0x0004)
  38 #define F_LSYMS         (0x0008)
  39 #define F_AR32WR        (0400)
  40
  41
  42 #define I386MAGIC       0x14c
  43 #define I386BADMAG(x) (((x).f_magic!=I386MAGIC))
  44
  45
  46 #define FILHDR  struct external_filehdr
  47 #define FILHSZ  sizeof(FILHDR)
  48
  49
  50 /********************** AOUT "OPTIONAL HEADER" **********************/
  51 struct internal_aouthdr {
  52         short           magic;  /* type of file                         */
  53         short           vstamp; /* version stamp                        */
  54         unsigned long   tsize;  /* text size in bytes, padded to FW bdry*/
  55         unsigned long   dsize;  /* initialized data "  "                */
  56         unsigned long   bsize;  /* uninitialized data "   "             */
  57         unsigned long   entry;  /* entry pt.                            */
  58         unsigned long   text_start;     /* base of text used for this file */
  59         unsigned long   data_start;     /* base of data used for this file */
  60         unsigned long   tagentries;     /* number of tag entries to follow */
  61 } ;
  62
  63
  64 typedef struct
  65 {
  66   char  magic[2];               /* type of file                         */
  67   char  vstamp[2];              /* version stamp                        */
  68   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  69   char  dsize[4];               /* initialized data "  "                */
  70   char  bsize[4];               /* uninitialized data "   "             */
  71   char  entry[4];               /* entry pt.                            */
  72   char  text_start[4];          /* base of text used for this file */
  73   char  data_start[4];          /* base of data used for this file */
  74 }
  75 AOUTHDR;
  76
  77 #define AOUTSZ (sizeof(AOUTHDR))
  78
  79
  80 /********************** STORAGE CLASSES **********************/
  81
  82 #define C_EFCN          -1      /* physical end of function     */
  83 #define C_NULL          0
  84 #define C_AUTO          1       /* automatic variable           */
  85 #define C_EXT           2       /* external symbol              */
  86 #define C_STAT          3       /* static                       */
  87 #define C_REG           4       /* register variable            */
  88 #define C_EXTDEF        5       /* external definition          */
  89 #define C_LABEL         6       /* label                        */
  90 #define C_ULABEL        7       /* undefined label              */
  91 #define C_MOS           8       /* member of structure          */
  92 #define C_ARG           9       /* function argument            */
  93 #define C_STRTAG        10      /* structure tag                */
  94 #define C_MOU           11      /* member of union              */
  95 #define C_UNTAG         12      /* union tag                    */
  96 #define C_TPDEF         13      /* type definition              */
  97 #define C_USTATIC       14      /* undefined static             */
  98 #define C_ENTAG         15      /* enumeration tag              */
  99 #define C_MOE           16      /* member of enumeration        */
 100 #define C_REGPARM       17      /* register parameter           */
 101 #define C_FIELD         18      /* bit field                    */
 102 #define C_AUTOARG       19      /* auto argument                */
 103 #define C_LASTENT       20      /* dummy entry (end of block)   */
 104 #define C_BLOCK         100     /* ".bb" or ".eb"               */
 105 #define C_FCN           101     /* ".bf" or ".ef"               */
 106 #define C_EOS           102     /* end of structure             */
 107 #define C_FILE          103     /* file name                    */
 108 #define C_LINE          104     /* line # reformatted as symbol table entry */
 109 #define C_ALIAS         105     /* duplicate tag                */
 110 #define C_HIDDEN        106     /* ext symbol in dmert public lib */
 111
 112 /********************** SECTION HEADER **********************/
 113
 114 struct internal_scnhdr {
 115         char            s_name[8];      /* section name                 */
 116         long            s_paddr;        /* physical address, aliased s_nlib */
 117         long            s_vaddr;        /* virtual address              */
 118         long            s_size;         /* section size                 */
 119         long            s_scnptr;       /* file ptr to raw data for section */
 120         long            s_relptr;       /* file ptr to relocation       */
 121         long            s_lnnoptr;      /* file ptr to line numbers     */
 122         unsigned short  s_nreloc;       /* number of relocation entries */
 123         unsigned short  s_nlnno;        /* number of line number entries*/
 124         long            s_flags;        /* flags                        */
 125 };
 126
 127 struct external_scnhdr {
 128         char            s_name[8];      /* section name                 */
 129         char            s_paddr[4];     /* physical address, aliased s_nlib */
 130         char            s_vaddr[4];     /* virtual address              */
 131         char            s_size[4];      /* section size                 */
 132         char            s_scnptr[4];    /* file ptr to raw data for section */
 133         char            s_relptr[4];    /* file ptr to relocation       */
 134         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 135         char            s_nreloc[2];    /* number of relocation entries */
 136         char            s_nlnno[2];     /* number of line number entries*/
 137         char            s_flags[4];     /* flags                        */
 138 };
 139
 140 /*
 141  * names of "special" sections
 142  */
 143 #define _TEXT   ".text"
 144 #define _DATA   ".data"
 145 #define _BSS    ".bss"
 146
 147 /*
 148  * s_flags "type"
 149  */
 150 #define STYP_REG         (0x0000) /* "regular": allocated, relocated, loaded */
 151 #define STYP_DSECT       (0x0001) /* "dummy":  relocated only*/
 152 #define STYP_NOLOAD      (0x0002) /* "noload": allocated, relocated, not loaded */
 153 #define STYP_GROUP       (0x0004) /* "grouped": formed of input sections */
 154 #define STYP_PAD         (0x0008) /* "padding": not allocated, not relocated, loaded */
 155 #define STYP_COPY        (0x0010) /* "copy": for decision function used by field update;  not allocated, not relocated,
 156                                      loaded; reloc & lineno entries processed normally */
 157 #define STYP_TEXT        (0x0020) /* section contains text only */
 158 #define S_SHRSEG         (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
 159                                      will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
 160                                      update all process invocations. */
 161 #define STYP_DATA        (0x0040) /* section contains data only */
 162 #define STYP_BSS         (0x0080) /* section contains bss only */
 163 #define S_NEWFCN         (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
 164 #define STYP_INFO        (0x0200) /* comment: not allocated not relocated, not loaded */
 165 #define STYP_OVER        (0x0400) /* overlay: relocated not allocated or loaded */
 166 #define STYP_LIB         (0x0800) /* for .lib: same as INFO */
 167 #define STYP_MERGE       (0x2000) /* merge section -- combines with text, data or bss sections only */
 168 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
 169                                      word of contiguous bytes beginning on a word boundary. */
 170
 171 #define SCNHDR  struct external_scnhdr
 172 #define SCNHSZ  sizeof(SCNHDR)
 173
 174
 175 /********************** LINE NUMBERS **********************/
 176
 177 /* 1 line number entry for every "breakpointable" source line in a section.
 178  * Line numbers are grouped on a per function basis; first entry in a function
 179  * grouping will have l_lnno = 0 and in place of physical address will be the
 180  * symbol table index of the function name.
 181  */
 182 struct external_lineno {
 183         union {
 184                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 185                 char l_paddr[4];        /* (physical) address of line number    */
 186         } l_addr;
 187         char l_lnno[2]; /* line number          */
 188 };
 189
 190 struct internal_lineno {
 191         union {
 192                 long l_symndx;  /* function name symbol index, iff l_lnno == 0*/
 193                 long l_paddr;   /* (physical) address of line number    */
 194         } l_addr;
 195         unsigned short  l_lnno; /* line number          */
 196 };
 197
 198 #define LINENO  struct external_lineno
 199 #define LINESZ  sizeof(LINENO)
 200
 201
 202 /********************** SYMBOLS **********************/
 203
 204 #define SYMNMLEN        8       /* # characters in a symbol name        */
 205 #define FILNMLEN        14      /* # characters in a file name          */
 206 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 207
 208 struct external_syment
 209 {
 210   union {
 211     char e_name[SYMNMLEN];
 212     struct {
 213       char e_zeroes[4];
 214       char e_offset[4];
 215     } e;
 216   } e;
 217   char e_value[4];
 218   char e_scnum[2];
 219   char e_type[2];
 220   char e_sclass[1];
 221   char e_numaux[1];
 222 };
 223
 224 struct internal_syment {
 225         union {
 226                 char    _n_name[SYMNMLEN];      /* old COFF version     */
 227                 struct {
 228                         long    _n_zeroes;      /* new == 0             */
 229                         long    _n_offset;      /* offset into string table */
 230                 } _n_n;
 231                 char    *_n_nptr[2];    /* allows for overlaying        */
 232         } _n;
 233         long            n_value;        /* value of symbol              */
 234         short           n_scnum;        /* section number               */
 235         unsigned short  n_flags;        /* copy of flags from filhdr    */
 236         unsigned short  n_type;         /* type and derived type        */
 237         char            n_sclass;       /* storage class                */
 238         char            n_numaux;       /* number of aux. entries       */
 239 };
 240
 241 /*#define n_name                _n._n_name
 242 #define n_ptr           _n._n_nptr[1]
 243 #define n_zeroes        _n._n_n._n_zeroes
 244 #define n_offset        _n._n_n._n_offset
 245 */
 246
 247 /*
 248  * Relocatable symbols have number of the section in which they are defined,
 249  * or one of the following:
 250  */
 251 #define N_UNDEF ((short)0)  /* undefined symbol */
 252 #define N_ABS   ((short)-1) /* value of symbol is absolute */
 253 #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
 254 #define N_TV    ((short)-3) /* indicates symbol needs preload transfer vector */
 255 #define P_TV    ((short)-4) /* indicates symbol needs postload transfer vector*/
 256
 257 /*
 258  * Type of a symbol, in low 4 bits of the word
 259  */
 260 #define T_NULL          0
 261 #define T_VOID          1       /* function argument (only used by compiler) */
 262 #define T_CHAR          2       /* character            */
 263 #define T_SHORT         3       /* short integer        */
 264 #define T_INT           4       /* integer              */
 265 #define T_LONG          5       /* long integer         */
 266 #define T_FLOAT         6       /* floating point       */
 267 #define T_DOUBLE        7       /* double word          */
 268 #define T_STRUCT        8       /* structure            */
 269 #define T_UNION         9       /* union                */
 270 #define T_ENUM          10      /* enumeration          */
 271 #define T_MOE           11      /* member of enumeration*/
 272 #define T_UCHAR         12      /* unsigned character   */
 273 #define T_USHORT        13      /* unsigned short       */
 274 #define T_UINT          14      /* unsigned integer     */
 275 #define T_ULONG         15      /* unsigned long        */
 276 #define T_LNGDBL        16      /* long double          */
 277
 278 /*
 279  * derived types, in n_type
 280 */
 281 #define DT_NON          (0)     /* no derived type */
 282 #define DT_PTR          (1)     /* pointer */
 283 #define DT_FCN          (2)     /* function */
 284 #define DT_ARY          (3)     /* array */
 285
 286 #define N_BTMASK        (0xf)
 287 #define N_TMASK         (0x30)
 288 #define N_BTSHFT        (4)
 289 #define N_TSHIFT        (2)
 290
 291 #define BTYPE(x)        ((x) & N_BTMASK)
 292
 293 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 294 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 295 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 296
 297 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 298
 299 union external_auxent {
 300         struct {
 301                 char x_tagndx[4];       /* str, un, or enum tag indx */
 302                 union {
 303                         struct {
 304                             char  x_lnno[2]; /* declaration line number */
 305                             char  x_size[2]; /* str/union/array size */
 306                         } x_lnsz;
 307                         char x_fsize[4];        /* size of function */
 308                 } x_misc;
 309                 union {
 310                         struct {                /* if ISFCN, tag, or .bb */
 311                             char x_lnnoptr[4];  /* ptr to fcn line # */
 312                             char x_endndx[4];   /* entry ndx past block end */
 313                         } x_fcn;
 314                         struct {                /* if ISARY, up to 4 dimen. */
 315                             char x_dimen[DIMNUM][2];
 316                         } x_ary;
 317                 } x_fcnary;
 318                 char x_tvndx[2];                /* tv index */
 319         } x_sym;
 320
 321         union {
 322                 char x_fname[FILNMLEN];
 323                 struct {
 324                         char x_zeroes[4];
 325                         char x_offset[4];
 326                 } x_n;
 327         } x_file;
 328
 329         struct {
 330                 char x_scnlen[4];                       /* section length */
 331                 char x_nreloc[2];       /* # relocation entries */
 332                 char x_nlinno[2];       /* # line numbers */
 333         } x_scn;
 334
 335         struct {
 336                 char x_tvfill[4];       /* tv fill value */
 337                 char x_tvlen[2];        /* length of .tv */
 338                 char x_tvran[2][2];     /* tv range */
 339         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 340
 341
 342 };
 343 union internal_auxent {
 344         struct {
 345                 long x_tagndx;  /* str, un, or enum tag indx */
 346                 union {
 347                         struct {
 348                             unsigned short x_lnno; /* declaration line number */
 349                             unsigned short x_size; /* str/union/array size */
 350                         } x_lnsz;
 351                         long x_fsize;   /* size of function */
 352                 } x_misc;
 353                 union {
 354                         struct {                /* if ISFCN, tag, or .bb */
 355                             long x_lnnoptr;     /* ptr to fcn line # */
 356                             long x_endndx;      /* entry ndx past block end */
 357                         } x_fcn;
 358                         struct {                /* if ISARY, up to 4 dimen. */
 359                             unsigned short x_dimen[DIMNUM];
 360                         } x_ary;
 361                 } x_fcnary;
 362                 unsigned short x_tvndx;         /* tv index */
 363         } x_sym;
 364
 365         union {
 366                 char x_fname[FILNMLEN];
 367                 struct {
 368                         long x_zeroes;
 369                         long x_offset;
 370                 } x_n;
 371         } x_file;
 372
 373         struct {
 374                 long x_scnlen;                  /* section length */
 375                 unsigned short x_nreloc;        /* # relocation entries */
 376                 unsigned short x_nlinno;        /* # line numbers */
 377         } x_scn;
 378
 379         struct {
 380                 long            x_tvfill;       /* tv fill value */
 381                 unsigned short  x_tvlen;        /* length of .tv */
 382                 unsigned short  x_tvran[2];     /* tv range */
 383         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 384
 385         /******************************************
 386          *  I960-specific *2nd* aux. entry formats
 387          ******************************************/
 388         struct {
 389 /* This is a very old typo that keeps getting propagated. */
 390 #define x_stdindx x_stindx
 391                 long x_stindx;  /* sys. table entry */
 392         } x_sc; /* system call entry */
 393
 394         struct {
 395                 unsigned long x_balntry; /* BAL entry point */
 396         } x_bal; /* BAL-callable function */
 397
 398         struct {
 399                 unsigned long   x_timestamp;            /* time stamp */
 400                 char    x_idstring[20];         /* producer identity string */
 401         } x_ident;                              /* Producer ident info */
 402
 403
 404 };
 405
 406 #define SYMENT  struct external_syment
 407 #define SYMESZ  18
 408 #define AUXENT  union external_auxent
 409 #define AUXESZ  18
 410
 411
 412 #       define _ETEXT   "etext"
 413
 414
 415 /********************** RELOCATION DIRECTIVES **********************/
 416
 417 struct internal_reloc {
 418         long r_vaddr;           /* Virtual address of reference */
 419         long r_symndx;          /* Index into symbol table      */
 420         unsigned short r_type;  /* Relocation type              */
 421 };
 422
 423
 424 struct external_reloc {
 425   char r_vaddr[4];
 426   char r_symndx[4];
 427   char r_type[2];
 428 };
 429
 430 #define R_DIR32         06
 431 #define R_PCLONG        020
 432 #define R_RELBYTE       017
 433 #define R_RELWORD       020
 434 #define R_RELLONG       021
 435 #define R_PCRBYTE       022
 436 #define R_PCRWORD       023
 437 #define R_PCRLONG       024
 438
 439 #define RELOC struct external_reloc
 440 #define RELSZ 10
 441
 442 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 443 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 444 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 445 /* For new sections we havn't heard of before */
 446 #define DEFAULT_SECTION_ALIGNMENT 4