include/coff-m68k.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        (0x0010)
  40
  41         /* Motorola 68000/68008/68010/68020 */
  42 #define MC68MAGIC       0520
  43 #define MC68KWRMAGIC    0520    /* writeable text segments */
  44 #define MC68TVMAGIC     0521
  45 #define MC68KROMAGIC    0521    /* readonly shareable text segments */
  46 #define MC68KPGMAGIC    0522    /* demand paged text segments */
  47 #define M68MAGIC        0210
  48 #define M68TVMAGIC      0211
  49
  50 #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
  51   ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC) )
  52
  53
  54
  55 #define FILHDR  struct external_filehdr
  56 #define FILHSZ  sizeof(FILHDR)
  57
  58
  59 /********************** AOUT "OPTIONAL HEADER" **********************/
  60 struct internal_aouthdr {
  61         short           magic;  /* type of file                         */
  62         short           vstamp; /* version stamp                        */
  63         unsigned long   tsize;  /* text size in bytes, padded to FW bdry*/
  64         unsigned long   dsize;  /* initialized data "  "                */
  65         unsigned long   bsize;  /* uninitialized data "   "             */
  66 #if U3B
  67         unsigned long   dum1;
  68         unsigned long   dum2;   /* pad to entry point   */
  69 #endif
  70         unsigned long   entry;  /* entry pt.                            */
  71         unsigned long   text_start;     /* base of text used for this file */
  72         unsigned long   data_start;     /* base of data used for this file */
  73         unsigned long   tagentries;     /* number of tag entries to follow */
  74 } ;
  75
  76
  77 typedef struct
  78 {
  79   char  magic[2];               /* type of file                         */
  80   char  vstamp[2];              /* version stamp                        */
  81   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  82   char  dsize[4];               /* initialized data "  "                */
  83   char  bsize[4];               /* uninitialized data "   "             */
  84   char  entry[4];               /* entry pt.                            */
  85   char  text_start[4];          /* base of text used for this file */
  86   char  data_start[4];          /* base of data used for this file */
  87   char  tagentries[4];          /* number of tag entries to follow */
  88 }
  89 AOUTHDR;
  90
  91 #define AOUTSZ (sizeof(AOUTHDR))
  92
  93
  94 /********************** STORAGE CLASSES **********************/
  95
  96 #define C_EFCN          -1      /* physical end of function     */
  97 #define C_NULL          0
  98 #define C_AUTO          1       /* automatic variable           */
  99 #define C_EXT           2       /* external symbol              */
 100 #define C_STAT          3       /* static                       */
 101 #define C_REG           4       /* register variable            */
 102 #define C_EXTDEF        5       /* external definition          */
 103 #define C_LABEL         6       /* label                        */
 104 #define C_ULABEL        7       /* undefined label              */
 105 #define C_MOS           8       /* member of structure          */
 106 #define C_ARG           9       /* function argument            */
 107 #define C_STRTAG        10      /* structure tag                */
 108 #define C_MOU           11      /* member of union              */
 109 #define C_UNTAG         12      /* union tag                    */
 110 #define C_TPDEF         13      /* type definition              */
 111 #define C_USTATIC       14      /* undefined static             */
 112 #define C_ENTAG         15      /* enumeration tag              */
 113 #define C_MOE           16      /* member of enumeration        */
 114 #define C_REGPARM       17      /* register parameter           */
 115 #define C_FIELD         18      /* bit field                    */
 116 #define C_AUTOARG       19      /* auto argument                */
 117 #define C_LASTENT       20      /* dummy entry (end of block)   */
 118 #define C_BLOCK         100     /* ".bb" or ".eb"               */
 119 #define C_FCN           101     /* ".bf" or ".ef"               */
 120 #define C_EOS           102     /* end of structure             */
 121 #define C_FILE          103     /* file name                    */
 122 #define C_LINE          104     /* line # reformatted as symbol table entry */
 123 #define C_ALIAS         105     /* duplicate tag                */
 124 #define C_HIDDEN        106     /* ext symbol in dmert public lib */
 125
 126 /********************** SECTION HEADER **********************/
 127
 128 struct internal_scnhdr {
 129         char            s_name[8];      /* section name                 */
 130         long            s_paddr;        /* physical address, aliased s_nlib */
 131         long            s_vaddr;        /* virtual address              */
 132         long            s_size;         /* section size                 */
 133         long            s_scnptr;       /* file ptr to raw data for section */
 134         long            s_relptr;       /* file ptr to relocation       */
 135         long            s_lnnoptr;      /* file ptr to line numbers     */
 136         unsigned short  s_nreloc;       /* number of relocation entries */
 137         unsigned short  s_nlnno;        /* number of line number entries*/
 138         long            s_flags;        /* flags                        */
 139 };
 140
 141 struct external_scnhdr {
 142         char            s_name[8];      /* section name                 */
 143         char            s_paddr[4];     /* physical address, aliased s_nlib */
 144         char            s_vaddr[4];     /* virtual address              */
 145         char            s_size[4];      /* section size                 */
 146         char            s_scnptr[4];    /* file ptr to raw data for section */
 147         char            s_relptr[4];    /* file ptr to relocation       */
 148         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 149         char            s_nreloc[2];    /* number of relocation entries */
 150         char            s_nlnno[2];     /* number of line number entries*/
 151         char            s_flags[4];     /* flags                        */
 152 };
 153
 154 /*
 155  * names of "special" sections
 156  */
 157 #define _TEXT   ".text"
 158 #define _DATA   ".data"
 159 #define _BSS    ".bss"
 160
 161 /*
 162  * s_flags "type"
 163  */
 164 #define STYP_REG         (0x0000) /* "regular": allocated, relocated, loaded */
 165 #define STYP_DSECT       (0x0001) /* "dummy":  relocated only*/
 166 #define STYP_NOLOAD      (0x0002) /* "noload": allocated, relocated, not loaded */
 167 #define STYP_GROUP       (0x0004) /* "grouped": formed of input sections */
 168 #define STYP_PAD         (0x0008) /* "padding": not allocated, not relocated, loaded */
 169 #define STYP_COPY        (0x0010) /* "copy": for decision function used by field update;  not allocated, not relocated,
 170                                      loaded; reloc & lineno entries processed normally */
 171 #define STYP_TEXT        (0x0020) /* section contains text only */
 172 #define S_SHRSEG         (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
 173                                      will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
 174                                      update all process invocations. */
 175 #define STYP_DATA        (0x0040) /* section contains data only */
 176 #define STYP_BSS         (0x0080) /* section contains bss only */
 177 #define S_NEWFCN         (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
 178 #define STYP_INFO        (0x0200) /* comment: not allocated not relocated, not loaded */
 179 #define STYP_OVER        (0x0400) /* overlay: relocated not allocated or loaded */
 180 #define STYP_LIB         (0x0800) /* for .lib: same as INFO */
 181 #define STYP_MERGE       (0x2000) /* merge section -- combines with text, data or bss sections only */
 182 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
 183                                      word of contiguous bytes beginning on a word boundary. */
 184
 185 #define SCNHDR  struct external_scnhdr
 186 #define SCNHSZ  sizeof(SCNHDR)
 187
 188
 189 /********************** LINE NUMBERS **********************/
 190
 191 /* 1 line number entry for every "breakpointable" source line in a section.
 192  * Line numbers are grouped on a per function basis; first entry in a function
 193  * grouping will have l_lnno = 0 and in place of physical address will be the
 194  * symbol table index of the function name.
 195  */
 196 struct external_lineno {
 197         union {
 198                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 199                 char l_paddr[4];        /* (physical) address of line number    */
 200         } l_addr;
 201         char l_lnno[2]; /* line number          */
 202 };
 203
 204 struct internal_lineno {
 205         union {
 206                 long l_symndx;  /* function name symbol index, iff l_lnno == 0*/
 207                 long l_paddr;   /* (physical) address of line number    */
 208         } l_addr;
 209         unsigned short  l_lnno; /* line number          */
 210 };
 211
 212 #define LINENO  struct external_lineno
 213 #define LINESZ  sizeof(LINENO)
 214
 215
 216 /********************** SYMBOLS **********************/
 217
 218 #define SYMNMLEN        8       /* # characters in a symbol name        */
 219 #define FILNMLEN        14      /* # characters in a file name          */
 220 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 221
 222 struct external_syment
 223 {
 224   union {
 225     char e_name[SYMNMLEN];
 226     struct {
 227       char e_zeroes[4];
 228       char e_offset[4];
 229     } e;
 230   } e;
 231   char e_value[4];
 232   char e_scnum[2];
 233   char e_type[2];
 234   char e_sclass[1];
 235   char e_numaux[1];
 236 };
 237
 238 struct internal_syment {
 239         union {
 240                 char    _n_name[SYMNMLEN];      /* old COFF version     */
 241                 struct {
 242                         long    _n_zeroes;      /* new == 0             */
 243                         long    _n_offset;      /* offset into string table */
 244                 } _n_n;
 245                 char    *_n_nptr[2];    /* allows for overlaying        */
 246         } _n;
 247         long            n_value;        /* value of symbol              */
 248         short           n_scnum;        /* section number               */
 249         unsigned short  n_flags;        /* copy of flags from filhdr    */
 250         unsigned short  n_type;         /* type and derived type        */
 251         char            n_sclass;       /* storage class                */
 252         char            n_numaux;       /* number of aux. entries       */
 253 };
 254
 255 /*#define n_name                _n._n_name
 256 #define n_ptr           _n._n_nptr[1]
 257 #define n_zeroes        _n._n_n._n_zeroes
 258 #define n_offset        _n._n_n._n_offset
 259 */
 260
 261 /*
 262  * Relocatable symbols have number of the section in which they are defined,
 263  * or one of the following:
 264  */
 265 #define N_UNDEF ((short)0)  /* undefined symbol */
 266 #define N_ABS   ((short)-1) /* value of symbol is absolute */
 267 #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
 268 #define N_TV    ((short)-3) /* indicates symbol needs preload transfer vector */
 269 #define P_TV    ((short)-4) /* indicates symbol needs postload transfer vector*/
 270
 271 /*
 272  * Type of a symbol, in low 4 bits of the word
 273  */
 274 #define T_NULL          0
 275 #define T_VOID          1       /* function argument (only used by compiler) */
 276 #define T_CHAR          2       /* character            */
 277 #define T_SHORT         3       /* short integer        */
 278 #define T_INT           4       /* integer              */
 279 #define T_LONG          5       /* long integer         */
 280 #define T_FLOAT         6       /* floating point       */
 281 #define T_DOUBLE        7       /* double word          */
 282 #define T_STRUCT        8       /* structure            */
 283 #define T_UNION         9       /* union                */
 284 #define T_ENUM          10      /* enumeration          */
 285 #define T_MOE           11      /* member of enumeration*/
 286 #define T_UCHAR         12      /* unsigned character   */
 287 #define T_USHORT        13      /* unsigned short       */
 288 #define T_UINT          14      /* unsigned integer     */
 289 #define T_ULONG         15      /* unsigned long        */
 290 #define T_LNGDBL        16      /* long double          */
 291
 292 /*
 293  * derived types, in n_type
 294 */
 295 #define DT_NON          (0)     /* no derived type */
 296 #define DT_PTR          (1)     /* pointer */
 297 #define DT_FCN          (2)     /* function */
 298 #define DT_ARY          (3)     /* array */
 299
 300 #define N_BTMASK        (0x1f)
 301 #define N_TMASK         (0x60)
 302 #define N_BTSHFT        (5)
 303 #define N_TSHIFT        (2)
 304
 305 #define BTYPE(x)        ((x) & N_BTMASK)
 306
 307 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 308 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 309 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 310
 311 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 312
 313 union external_auxent {
 314         struct {
 315                 char x_tagndx[4];       /* str, un, or enum tag indx */
 316                 union {
 317                         struct {
 318                             char  x_lnno[2]; /* declaration line number */
 319                             char  x_size[2]; /* str/union/array size */
 320                         } x_lnsz;
 321                         char x_fsize[4];        /* size of function */
 322                 } x_misc;
 323                 union {
 324                         struct {                /* if ISFCN, tag, or .bb */
 325                             char x_lnnoptr[4];  /* ptr to fcn line # */
 326                             char x_endndx[4];   /* entry ndx past block end */
 327                         } x_fcn;
 328                         struct {                /* if ISARY, up to 4 dimen. */
 329                             char x_dimen[DIMNUM][2];
 330                         } x_ary;
 331                 } x_fcnary;
 332                 char x_tvndx[2];                /* tv index */
 333         } x_sym;
 334
 335         union {
 336                 char x_fname[FILNMLEN];
 337                 struct {
 338                         char x_zeroes[4];
 339                         char x_offset[4];
 340                 } x_n;
 341         } x_file;
 342
 343         struct {
 344                 char x_scnlen[4];                       /* section length */
 345                 char x_nreloc[2];       /* # relocation entries */
 346                 char x_nlinno[2];       /* # line numbers */
 347         } x_scn;
 348
 349         struct {
 350                 char x_tvfill[4];       /* tv fill value */
 351                 char x_tvlen[2];        /* length of .tv */
 352                 char x_tvran[2][2];     /* tv range */
 353         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 354
 355
 356 };
 357 union internal_auxent {
 358         struct {
 359                 long x_tagndx;  /* str, un, or enum tag indx */
 360                 union {
 361                         struct {
 362                             unsigned short x_lnno; /* declaration line number */
 363                             unsigned short x_size; /* str/union/array size */
 364                         } x_lnsz;
 365                         long x_fsize;   /* size of function */
 366                 } x_misc;
 367                 union {
 368                         struct {                /* if ISFCN, tag, or .bb */
 369                             long x_lnnoptr;     /* ptr to fcn line # */
 370                             long x_endndx;      /* entry ndx past block end */
 371                         } x_fcn;
 372                         struct {                /* if ISARY, up to 4 dimen. */
 373                             unsigned short x_dimen[DIMNUM];
 374                         } x_ary;
 375                 } x_fcnary;
 376                 unsigned short x_tvndx;         /* tv index */
 377         } x_sym;
 378
 379         union {
 380                 char x_fname[FILNMLEN];
 381                 struct {
 382                         long x_zeroes;
 383                         long x_offset;
 384                 } x_n;
 385         } x_file;
 386
 387         struct {
 388                 long x_scnlen;                  /* section length */
 389                 unsigned short x_nreloc;        /* # relocation entries */
 390                 unsigned short x_nlinno;        /* # line numbers */
 391         } x_scn;
 392
 393         struct {
 394                 long            x_tvfill;       /* tv fill value */
 395                 unsigned short  x_tvlen;        /* length of .tv */
 396                 unsigned short  x_tvran[2];     /* tv range */
 397         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 398
 399         /******************************************
 400          *  I960-specific *2nd* aux. entry formats
 401          ******************************************/
 402         struct {
 403 /* This is a very old typo that keeps getting propagated. */
 404 #define x_stdindx x_stindx
 405                 long x_stindx;  /* sys. table entry */
 406         } x_sc; /* system call entry */
 407
 408         struct {
 409                 unsigned long x_balntry; /* BAL entry point */
 410         } x_bal; /* BAL-callable function */
 411
 412         struct {
 413                 unsigned long   x_timestamp;            /* time stamp */
 414                 char    x_idstring[20];         /* producer identity string */
 415         } x_ident;                              /* Producer ident info */
 416
 417
 418 };
 419
 420 #define SYMENT  struct external_syment
 421 #define SYMESZ  18
 422 #define AUXENT  union external_auxent
 423 #define AUXESZ  18
 424
 425
 426 #       define _ETEXT   "etext"
 427
 428
 429 /********************** RELOCATION DIRECTIVES **********************/
 430
 431 struct internal_reloc {
 432         long r_vaddr;           /* Virtual address of reference */
 433         long r_symndx;          /* Index into symbol table      */
 434         unsigned short r_type;  /* Relocation type              */
 435 };
 436
 437
 438 struct external_reloc {
 439   char r_vaddr[4];
 440   char r_symndx[4];
 441   char r_type[2];
 442 };
 443
 444 #define R_RELBYTE       017
 445 #define R_RELWORD       020
 446 #define R_RELLONG       021
 447 #define R_PCRBYTE       022
 448 #define R_PCRWORD       023
 449 #define R_PCRLONG       024
 450
 451 #define RELOC struct external_reloc
 452 #define RELSZ 10
 453
 454 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 455 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 456 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 457 /* For new sections we havn't heard of before */
 458 #define DEFAULT_SECTION_ALIGNMENT 4