include/coff-m68k.h

   1 /*** coff information for M68K */
   2
   3
   4 /********************** FILE HEADER **********************/
   5
   6 struct filehdr {
   7         unsigned short  f_magic;        /* magic number                 */
   8         unsigned short  f_nscns;        /* number of sections           */
   9         long            f_timdat;       /* time & date stamp            */
  10         long            f_symptr;       /* file pointer to symtab       */
  11         long            f_nsyms;        /* number of symtab entries     */
  12         unsigned short  f_opthdr;       /* sizeof(optional hdr)         */
  13         unsigned short  f_flags;        /* flags                        */
  14 };
  15
  16 /* Bits for f_flags:
  17  *      F_RELFLG        relocation info stripped from file
  18  *      F_EXEC          file is executable (no unresolved external references)
  19  *      F_LNNO          line numbers stripped from file
  20  *      F_LSYMS         local symbols stripped from file
  21  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  22  */
  23
  24 #define F_RELFLG        (0x0001)
  25 #define F_EXEC          (0x0002)
  26 #define F_LNNO          (0x0004)
  27 #define F_LSYMS         (0x0008)
  28 #define F_AR32WR        (0x0010)
  29
  30         /* Motorola 68000/68008/68010/68020 */
  31 #define MC68MAGIC       0520
  32 #define MC68KWRMAGIC    0520    /* writeable text segments */
  33 #define MC68TVMAGIC     0521
  34 #define MC68KROMAGIC    0521    /* readonly shareable text segments */
  35 #define MC68KPGMAGIC    0522    /* demand paged text segments */
  36 #define M68MAGIC        0210
  37 #define M68TVMAGIC      0211
  38
  39 #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
  40   ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC) )
  41
  42
  43
  44 #define FILHDR  struct filehdr
  45 #define FILHSZ  sizeof(FILHDR)
  46
  47
  48 /********************** AOUT "OPTIONAL HEADER" **********************/
  49
  50 typedef struct aouthdr {
  51         short           magic;  /* type of file                         */
  52         short           vstamp; /* version stamp                        */
  53         unsigned long   tsize;  /* text size in bytes, padded to FW bdry*/
  54         unsigned long   dsize;  /* initialized data "  "                */
  55         unsigned long   bsize;  /* uninitialized data "   "             */
  56
  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 } AOUTHDR;
  61
  62
  63
  64 #define AOUTSZ (sizeof(AOUTHDR))
  65
  66
  67 /********************** STORAGE CLASSES **********************/
  68
  69 #define C_EFCN          -1      /* physical end of function     */
  70 #define C_NULL          0
  71 #define C_AUTO          1       /* automatic variable           */
  72 #define C_EXT           2       /* external symbol              */
  73 #define C_STAT          3       /* static                       */
  74 #define C_REG           4       /* register variable            */
  75 #define C_EXTDEF        5       /* external definition          */
  76 #define C_LABEL         6       /* label                        */
  77 #define C_ULABEL        7       /* undefined label              */
  78 #define C_MOS           8       /* member of structure          */
  79 #define C_ARG           9       /* function argument            */
  80 #define C_STRTAG        10      /* structure tag                */
  81 #define C_MOU           11      /* member of union              */
  82 #define C_UNTAG         12      /* union tag                    */
  83 #define C_TPDEF         13      /* type definition              */
  84 #define C_USTATIC       14      /* undefined static             */
  85 #define C_ENTAG         15      /* enumeration tag              */
  86 #define C_MOE           16      /* member of enumeration        */
  87 #define C_REGPARM       17      /* register parameter           */
  88 #define C_FIELD         18      /* bit field                    */
  89 #define C_AUTOARG       19      /* auto argument                */
  90 #define C_LASTENT       20      /* dummy entry (end of block)   */
  91 #define C_BLOCK         100     /* ".bb" or ".eb"               */
  92 #define C_FCN           101     /* ".bf" or ".ef"               */
  93 #define C_EOS           102     /* end of structure             */
  94 #define C_FILE          103     /* file name                    */
  95 #define C_LINE          104     /* line # reformatted as symbol table entry */
  96 #define C_ALIAS         105     /* duplicate tag                */
  97 #define C_HIDDEN        106     /* ext symbol in dmert public lib */
  98
  99 /********************** SECTION HEADER **********************/
 100
 101 struct scnhdr {
 102         char            s_name[8];      /* section name                 */
 103         long            s_paddr;        /* physical address, aliased s_nlib */
 104         long            s_vaddr;        /* virtual address              */
 105         long            s_size;         /* section size                 */
 106         long            s_scnptr;       /* file ptr to raw data for section */
 107         long            s_relptr;       /* file ptr to relocation       */
 108         long            s_lnnoptr;      /* file ptr to line numbers     */
 109         unsigned short  s_nreloc;       /* number of relocation entries */
 110         unsigned short  s_nlnno;        /* number of line number entries*/
 111         long            s_flags;        /* flags                        */
 112
 113 };
 114
 115 /*
 116  * names of "special" sections
 117  */
 118 #define _TEXT   ".text"
 119 #define _DATA   ".data"
 120 #define _BSS    ".bss"
 121
 122 /*
 123  * s_flags "type"
 124  */
 125 #define STYP_REG         (0x0000) /* "regular": allocated, relocated, loaded */
 126 #define STYP_DSECT       (0x0001) /* "dummy":  relocated only*/
 127 #define STYP_NOLOAD      (0x0002) /* "noload": allocated, relocated, not loaded */
 128 #define STYP_GROUP       (0x0004) /* "grouped": formed of input sections */
 129 #define STYP_PAD         (0x0008) /* "padding": not allocated, not relocated, loaded */
 130 #define STYP_COPY        (0x0010) /* "copy": for decision function used by field update;  not allocated, not relocated,
 131                                      loaded; reloc & lineno entries processed normally */
 132 #define STYP_TEXT        (0x0020) /* section contains text only */
 133 #define S_SHRSEG         (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
 134                                      will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
 135                                      update all process invocations. */
 136 #define STYP_DATA        (0x0040) /* section contains data only */
 137 #define STYP_BSS         (0x0080) /* section contains bss only */
 138 #define S_NEWFCN         (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
 139 #define STYP_INFO        (0x0200) /* comment: not allocated not relocated, not loaded */
 140 #define STYP_OVER        (0x0400) /* overlay: relocated not allocated or loaded */
 141 #define STYP_LIB         (0x0800) /* for .lib: same as INFO */
 142 #define STYP_MERGE       (0x2000) /* merge section -- combines with text, data or bss sections only */
 143 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
 144                                      word of contiguous bytes beginning on a word boundary. */
 145
 146 #define SCNHDR  struct scnhdr
 147 #define SCNHSZ  sizeof(SCNHDR)
 148
 149
 150 /********************** LINE NUMBERS **********************/
 151
 152 /* 1 line number entry for every "breakpointable" source line in a section.
 153  * Line numbers are grouped on a per function basis; first entry in a function
 154  * grouping will have l_lnno = 0 and in place of physical address will be the
 155  * symbol table index of the function name.
 156  */
 157 struct external_lineno {
 158         union {
 159                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 160                 char l_paddr[4];        /* (physical) address of line number    */
 161         } l_addr;
 162         char l_lnno[2]; /* line number          */
 163 };
 164
 165 struct internal_lineno {
 166         union {
 167                 long l_symndx;  /* function name symbol index, iff l_lnno == 0*/
 168                 long l_paddr;   /* (physical) address of line number    */
 169         } l_addr;
 170         unsigned short  l_lnno; /* line number          */
 171 };
 172
 173 #define LINENO  struct external_lineno
 174 #define LINESZ  sizeof(LINENO)
 175
 176
 177 /********************** SYMBOLS **********************/
 178
 179 #define SYMNMLEN        8       /* # characters in a symbol name        */
 180 #define FILNMLEN        14      /* # characters in a file name          */
 181 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 182
 183 struct external_syment
 184 {
 185   union {
 186     char e_name[SYMNMLEN];
 187     struct {
 188       char e_zeroes[4];
 189       char e_offset[4];
 190     } e;
 191   } e;
 192   char e_value[4];
 193   char e_scnum[2];
 194   char e_type[2];
 195   char e_sclass[1];
 196   char e_numaux[1];
 197 };
 198
 199 struct internal_syment {
 200         union {
 201                 char    _n_name[SYMNMLEN];      /* old COFF version     */
 202                 struct {
 203                         long    _n_zeroes;      /* new == 0             */
 204                         long    _n_offset;      /* offset into string table */
 205                 } _n_n;
 206                 char    *_n_nptr[2];    /* allows for overlaying        */
 207         } _n;
 208         long            n_value;        /* value of symbol              */
 209         short           n_scnum;        /* section number               */
 210         unsigned short  n_flags;        /* copy of flags from filhdr    */
 211         unsigned short  n_type;         /* type and derived type        */
 212         char            n_sclass;       /* storage class                */
 213         char            n_numaux;       /* number of aux. entries       */
 214 };
 215
 216 /*#define n_name                _n._n_name
 217 #define n_ptr           _n._n_nptr[1]
 218 #define n_zeroes        _n._n_n._n_zeroes
 219 #define n_offset        _n._n_n._n_offset
 220 */
 221
 222 /*
 223  * Relocatable symbols have number of the section in which they are defined,
 224  * or one of the following:
 225  */
 226 #define N_UNDEF ((short)0)  /* undefined symbol */
 227 #define N_ABS   ((short)-1) /* value of symbol is absolute */
 228 #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
 229 #define N_TV    ((short)-3) /* indicates symbol needs preload transfer vector */
 230 #define P_TV    ((short)-4) /* indicates symbol needs postload transfer vector*/
 231
 232 /*
 233  * Type of a symbol, in low 4 bits of the word
 234  */
 235 #define T_NULL          0
 236 #define T_VOID          1       /* function argument (only used by compiler) */
 237 #define T_CHAR          2       /* character            */
 238 #define T_SHORT         3       /* short integer        */
 239 #define T_INT           4       /* integer              */
 240 #define T_LONG          5       /* long integer         */
 241 #define T_FLOAT         6       /* floating point       */
 242 #define T_DOUBLE        7       /* double word          */
 243 #define T_STRUCT        8       /* structure            */
 244 #define T_UNION         9       /* union                */
 245 #define T_ENUM          10      /* enumeration          */
 246 #define T_MOE           11      /* member of enumeration*/
 247 #define T_UCHAR         12      /* unsigned character   */
 248 #define T_USHORT        13      /* unsigned short       */
 249 #define T_UINT          14      /* unsigned integer     */
 250 #define T_ULONG         15      /* unsigned long        */
 251 #define T_LNGDBL        16      /* long double          */
 252
 253 /*
 254  * derived types, in n_type
 255 */
 256 #define DT_NON          (0)     /* no derived type */
 257 #define DT_PTR          (1)     /* pointer */
 258 #define DT_FCN          (2)     /* function */
 259 #define DT_ARY          (3)     /* array */
 260
 261 #define N_BTMASK        (0x1f)
 262 #define N_TMASK         (0x60)
 263 #define N_BTSHFT        (5)
 264 #define N_TSHIFT        (2)
 265
 266 #define BTYPE(x)        ((x) & N_BTMASK)
 267
 268 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 269 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 270 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 271
 272 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 273
 274 union external_auxent {
 275         struct {
 276                 char x_tagndx[4];       /* str, un, or enum tag indx */
 277                 union {
 278                         struct {
 279                             char  x_lnno[2]; /* declaration line number */
 280                             char  x_size[2]; /* str/union/array size */
 281                         } x_lnsz;
 282                         char x_fsize[4];        /* size of function */
 283                 } x_misc;
 284                 union {
 285                         struct {                /* if ISFCN, tag, or .bb */
 286                             char x_lnnoptr[4];  /* ptr to fcn line # */
 287                             char x_endndx[4];   /* entry ndx past block end */
 288                         } x_fcn;
 289                         struct {                /* if ISARY, up to 4 dimen. */
 290                             char x_dimen[DIMNUM][2];
 291                         } x_ary;
 292                 } x_fcnary;
 293                 char x_tvndx[2];                /* tv index */
 294         } x_sym;
 295
 296         union {
 297                 char x_fname[FILNMLEN];
 298                 struct {
 299                         char x_zeroes[4];
 300                         char x_offset[4];
 301                 } x_n;
 302         } x_file;
 303
 304         struct {
 305                 char x_scnlen[4];                       /* section length */
 306                 char x_nreloc[2];       /* # relocation entries */
 307                 char x_nlinno[2];       /* # line numbers */
 308         } x_scn;
 309
 310         struct {
 311                 char x_tvfill[4];       /* tv fill value */
 312                 char x_tvlen[2];        /* length of .tv */
 313                 char x_tvran[2][2];     /* tv range */
 314         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 315
 316
 317 };
 318 union internal_auxent {
 319         struct {
 320                 long x_tagndx;  /* str, un, or enum tag indx */
 321                 union {
 322                         struct {
 323                             unsigned short x_lnno; /* declaration line number */
 324                             unsigned short x_size; /* str/union/array size */
 325                         } x_lnsz;
 326                         long x_fsize;   /* size of function */
 327                 } x_misc;
 328                 union {
 329                         struct {                /* if ISFCN, tag, or .bb */
 330                             long x_lnnoptr;     /* ptr to fcn line # */
 331                             long x_endndx;      /* entry ndx past block end */
 332                         } x_fcn;
 333                         struct {                /* if ISARY, up to 4 dimen. */
 334                             unsigned short x_dimen[DIMNUM];
 335                         } x_ary;
 336                 } x_fcnary;
 337                 unsigned short x_tvndx;         /* tv index */
 338         } x_sym;
 339
 340         union {
 341                 char x_fname[FILNMLEN];
 342                 struct {
 343                         long x_zeroes;
 344                         long x_offset;
 345                 } x_n;
 346         } x_file;
 347
 348         struct {
 349                 long x_scnlen;                  /* section length */
 350                 unsigned short x_nreloc;        /* # relocation entries */
 351                 unsigned short x_nlinno;        /* # line numbers */
 352         } x_scn;
 353
 354         struct {
 355                 long            x_tvfill;       /* tv fill value */
 356                 unsigned short  x_tvlen;        /* length of .tv */
 357                 unsigned short  x_tvran[2];     /* tv range */
 358         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 359
 360         /******************************************
 361          *  I960-specific *2nd* aux. entry formats
 362          ******************************************/
 363         struct {
 364 /* This is a very old typo that keeps getting propagated. */
 365 #define x_stdindx x_stindx
 366                 long x_stindx;  /* sys. table entry */
 367         } x_sc; /* system call entry */
 368
 369         struct {
 370                 unsigned long x_balntry; /* BAL entry point */
 371         } x_bal; /* BAL-callable function */
 372
 373         struct {
 374                 unsigned long   x_timestamp;            /* time stamp */
 375                 char    x_idstring[20];         /* producer identity string */
 376         } x_ident;                              /* Producer ident info */
 377
 378
 379 };
 380
 381 #define SYMENT  struct external_syment
 382 #define SYMESZ  18
 383 #define AUXENT  union external_auxent
 384 #define AUXESZ  18
 385
 386
 387 #       define _ETEXT   "etext"
 388
 389
 390 /********************** RELOCATION DIRECTIVES **********************/
 391
 392 struct internal_reloc {
 393         long r_vaddr;           /* Virtual address of reference */
 394         long r_symndx;          /* Index into symbol table      */
 395         unsigned short r_type;  /* Relocation type              */
 396 };
 397
 398
 399 struct external_reloc {
 400   char r_vaddr[4];
 401   char r_symndx[4];
 402   char r_type[2];
 403 };
 404
 405 #define R_RELBYTE       017
 406 #define R_RELWORD       020
 407 #define R_RELLONG       021
 408 #define R_PCRBYTE       022
 409 #define R_PCRWORD       023
 410 #define R_PCRLONG       024
 411
 412 #define RELOC struct external_reloc
 413 #define RELSZ 10
 414
 415 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 416 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 417 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 418 /* For new sections we havn't heard of before */
 419 #define DEFAULT_SECTION_ALIGNMENT 4