include/coff-m88k.h

   1 /*** coff information for 88k bcs */
   2
   3 /********************** FILE HEADER **********************/
   4
   5 struct filehdr {
   6         unsigned short  f_magic;        /* magic number                 */
   7         unsigned short  f_nscns;        /* number of sections           */
   8         long            f_timdat;       /* time & date stamp            */
   9         long            f_symptr;       /* file pointer to symtab       */
  10         long            f_nsyms;        /* number of symtab entries     */
  11         unsigned short  f_opthdr;       /* sizeof(optional hdr)         */
  12         unsigned short  f_flags;        /* flags                        */
  13 };
  14
  15 /* Bits for f_flags:
  16  *      F_RELFLG        relocation info stripped from file
  17  *      F_EXEC          file is executable (no unresolved externel references)
  18  *      F_LNNO          line nunbers stripped from file
  19  *      F_LSYMS         local symbols stripped from file
  20  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  21  */
  22 #define F_RELFLG        0000001
  23 #define F_EXEC          0000002
  24 #define F_LNNO          0000004
  25 #define F_LSYMS 0000010
  26 #define F_AR32WR        0x100
  27 #define F_AR32W     0x200
  28
  29 #define MC88MAGIC  0540           /* 88k BCS executable */
  30 #define MC88DMAGIC 0541           /* DG/UX executable   */
  31 #define MC88OMAGIC 0555           /* Object file        */
  32
  33 #define MC88BADMAG(x) (((x).f_magic!=MC88MAGIC) &&((x).f_magic!=MC88DMAGIC) && ((x).f_magic != MC88OMAGIC))
  34
  35 #define FILHDR  struct filehdr
  36 #define FILHSZ  sizeof(FILHDR)
  37
  38
  39 /********************** AOUT "OPTIONAL HEADER" **********************/
  40
  41
  42 #define PAGEMAGIC3 0414 /* Split i&d, zero mapped */
  43 #define PAGEMAGICBCS 0413
  44
  45 typedef struct aouthdr {
  46         short           magic;  /* type of file                         */
  47         short           vstamp; /* version stamp                        */
  48         unsigned long   tsize;  /* text size in bytes, padded to FW bdry*/
  49         unsigned long   dsize;  /* initialized data "  "                */
  50         unsigned long   bsize;  /* uninitialized data "   "             */
  51
  52         unsigned long   entry;  /* entry pt.                            */
  53         unsigned long   text_start;     /* base of text used for this file */
  54         unsigned long   data_start;     /* base of data used for this file */
  55
  56 } AOUTHDR;
  57
  58
  59 /* compute size of a header */
  60
  61 #define AOUTSZ (sizeof(AOUTHDR))
  62
  63 /********************** STORAGE CLASSES **********************/
  64
  65 #define C_EFCN          -1      /* physical end of function     */
  66 #define C_NULL          0
  67 #define C_AUTO          1       /* automatic variable           */
  68 #define C_EXT           2       /* external symbol              */
  69 #define C_STAT          3       /* static                       */
  70 #define C_REG           4       /* register variable            */
  71 #define C_EXTDEF        5       /* external definition          */
  72 #define C_LABEL         6       /* label                        */
  73 #define C_ULABEL        7       /* undefined label              */
  74 #define C_MOS           8       /* member of structure          */
  75 #define C_ARG           9       /* function argument            */
  76 #define C_STRTAG        10      /* structure tag                */
  77 #define C_MOU           11      /* member of union              */
  78 #define C_UNTAG         12      /* union tag                    */
  79 #define C_TPDEF         13      /* type definition              */
  80 #define C_USTATIC       14      /* undefined static             */
  81 #define C_ENTAG         15      /* enumeration tag              */
  82 #define C_MOE           16      /* member of enumeration        */
  83 #define C_REGPARM       17      /* register parameter           */
  84 #define C_FIELD         18      /* bit field                    */
  85 #define C_BLOCK         100     /* ".bb" or ".eb"               */
  86 #define C_FCN           101     /* ".bf" or ".ef"               */
  87 #define C_EOS           102     /* end of structure             */
  88 #define C_FILE          103     /* file name                    */
  89 #define C_LINE          104     /* line # reformatted as symbol table entry */
  90 #define C_ALIAS         105     /* duplicate tag                */
  91 #define C_HIDDEN        106     /* ext symbol in dmert public lib */
  92 #define C_SHADOW        107     /* shadow symbol                */
  93 #define C_VERSION       108     /* coff version symbol          */
  94
  95
  96 /********************** SECTION HEADER **********************/
  97
  98 struct scnhdr {
  99         char            s_name[8];      /* section name                 */
 100         long            s_paddr;        /* physical address, aliased s_nlib */
 101         long            s_vaddr;        /* virtual address              */
 102         long            s_size;         /* section size                 */
 103         long            s_scnptr;       /* file ptr to raw data for section */
 104         long            s_relptr;       /* file ptr to relocation       */
 105         long            s_lnnoptr;      /* file ptr to line numbers     */
 106         long            s_nreloc;       /* number of relocation entries */
 107         long            s_nlnno;        /* number of line number entries*/
 108         long            s_flags;        /* flags                        */
 109 };
 110
 111 /*
 112  * names of "special" sections
 113  */
 114 #define _TEXT   ".text"
 115 #define _DATA   ".data"
 116 #define _BSS    ".bss"
 117
 118 /*
 119  * s_flags "type"
 120  */
 121 #define STYP_TEXT       0x20            /* section contains text only   */
 122 #define STYP_DATA       0x40            /* section contains data only   */
 123 #define STYP_BSS        0x80            /* section contains bss only    */
 124
 125 #define SCNHDR  struct scnhdr
 126 #define SCNHSZ  sizeof(SCNHDR)
 127
 128
 129 /********************** LINE NUMBERS **********************/
 130
 131 /* 1 line number entry for every "breakpointable" source line in a section.
 132  * Line numbers are grouped on a per function basis; first entry in a function
 133  * grouping will have l_lnno = 0 and in place of physical address will be the
 134  * symbol table index of the function name.
 135  */
 136 struct external_lineno{
 137         union {
 138                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 139                 char l_paddr[4];        /* (physical) address of line number    */
 140         } l_addr;
 141
 142         char l_lnno[4];
 143
 144 };
 145 struct internal_lineno{
 146         union {
 147                 long l_symndx;  /* function name symbol index, iff l_lnno == 0*/
 148                 long l_paddr;   /* (physical) address of line number    */
 149         } l_addr;
 150
 151         long l_lnno;
 152
 153 };
 154
 155 #define LINENO  struct external_lineno
 156 #define LINESZ  8
 157
 158
 159 /********************** SYMBOLS **********************/
 160
 161 #define SYMNMLEN        8       /* # characters in a symbol name        */
 162 #define FILNMLEN        14      /* # characters in a file name          */
 163 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 164
 165 struct external_syment
 166 {
 167   union {
 168     char e_name[SYMNMLEN];
 169     struct {
 170       char e_zeroes[4];
 171       char e_offset[4];
 172     } e;
 173   } e;
 174   char e_value[4];
 175   char e_scnum[2];
 176   char e_type[2];
 177   char e_sclass[1];
 178   char e_numaux[1];
 179   char pad2[2];
 180 };
 181
 182 struct internal_syment {
 183         union {
 184                 char    _n_name[SYMNMLEN];      /* old COFF version     */
 185                 struct {
 186                         long    _n_zeroes;      /* new == 0             */
 187                         long    _n_offset;      /* offset into string table */
 188                 } _n_n;
 189                 char    *_n_nptr[2];    /* allows for overlaying        */
 190         } _n;
 191         long            n_value;        /* value of symbol              */
 192         short           n_scnum;        /* section number               */
 193         unsigned short  n_type;         /* type and derived type        */
 194         char            n_sclass;       /* storage class                */
 195         char            n_numaux;       /* number of aux. entries       */
 196
 197 };
 198
 199 /*
 200  * Relocatable symbols have number of the section in which they are defined,
 201  * or one of the following:
 202  */
 203 #define N_UNDEF 0       /* undefined symbol                             */
 204 #define N_ABS   -1      /* value of symbol is absolute                  */
 205 #define N_DEBUG -2      /* debugging symbol -- symbol value is meaningless */
 206
 207 /*
 208  * Type of a symbol, in low 4 bits of the word
 209  */
 210 #define T_NULL          0
 211 #define T_VOID          1       /* function argument (only used by compiler) */
 212 #define T_CHAR          2       /* character            */
 213 #define T_SHORT         3       /* short integer        */
 214 #define T_INT           4       /* integer              */
 215 #define T_LONG          5       /* long integer         */
 216 #define T_FLOAT         6       /* floating point       */
 217 #define T_DOUBLE        7       /* double word          */
 218 #define T_STRUCT        8       /* structure            */
 219 #define T_UNION         9       /* union                */
 220 #define T_ENUM          10      /* enumeration          */
 221 #define T_MOE           11      /* member of enumeration*/
 222 #define T_UCHAR         12      /* unsigned character   */
 223 #define T_USHORT        13      /* unsigned short       */
 224 #define T_UINT          14      /* unsigned integer     */
 225 #define T_ULONG         15      /* unsigned long        */
 226
 227
 228
 229 /*
 230  * derived types
 231  */
 232 #define DT_NON          0
 233 #define DT_PTR          1       /* pointer      */
 234 #define DT_FCN          2       /* function     */
 235 #define DT_ARY          3       /* array        */
 236
 237 #define N_BTMASK        017
 238 #define N_TMASK         060
 239 #define N_BTSHFT        4
 240 #define N_TSHIFT        2
 241
 242 #define BTYPE(x)        ((x) & N_BTMASK)
 243
 244
 245 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 246 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 247 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 248
 249 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 250
 251 union external_auxent {
 252         struct {
 253                 char x_tagndx[4];       /* str, un, or enum tag indx */
 254                 union {
 255                         struct {
 256                             char  x_lnno[2]; /* declaration line number */
 257                             char  x_size[2]; /* str/union/array size */
 258                         } x_lnsz;
 259                         char x_fsize[4];        /* size of function */
 260                 } x_misc;
 261                 union {
 262                         struct {                /* if ISFCN, tag, or .bb */
 263                             char x_lnnoptr[4];  /* ptr to fcn line # */
 264                             char x_endndx[4];   /* entry ndx past block end */
 265                         } x_fcn;
 266                         struct {                /* if ISARY, up to 4 dimen. */
 267                             char x_dimen[DIMNUM][2];
 268                         } x_ary;
 269                 } x_fcnary;
 270                 char x_tvndx[2];                /* tv index */
 271         } x_sym;
 272
 273         union {
 274                 char x_fname[FILNMLEN];
 275                 struct {
 276                         char x_zeroes[4];
 277                         char x_offset[4];
 278                 } x_n;
 279         } x_file;
 280
 281         struct {
 282                 char x_scnlen[4];                       /* section length */
 283                 char x_nreloc[2];       /* # relocation entries */
 284                 char x_nlinno[2];       /* # line numbers */
 285         } x_scn;
 286
 287         struct {
 288                 char x_tvfill[4];       /* tv fill value */
 289                 char x_tvlen[2];        /* length of .tv */
 290                 char x_tvran[2][2];     /* tv range */
 291         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 292
 293
 294 };
 295 union   internal_auxent
 296 {
 297   struct {
 298     long x_tagndx;              /* str, un, or enum tag indx */
 299     union {
 300       struct {
 301         unsigned short x_lnno;  /* declaration line number */
 302         unsigned short x_size;  /* str/union/array size */
 303       } x_lnsz;
 304       long x_fsize;             /* size of function */
 305     } x_misc;
 306     union {
 307       struct {                  /* if ISFCN, tag, or .bb */
 308         long x_lnnoptr;         /* ptr to fcn line # */
 309         long x_endndx;          /* entry ndx past block end */
 310       } x_fcn;
 311       struct {                  /* if ISARY, up to 4 dimen. */
 312         unsigned short x_dimen[DIMNUM];
 313       } x_ary;
 314     } x_fcnary;
 315     unsigned short x_tvndx;     /* tv index */
 316   } x_sym;
 317
 318   union {
 319     char x_fname[FILNMLEN];
 320     struct {
 321       long x_zeroes;
 322       long x_offset;
 323     } x_n;
 324   } x_file;
 325
 326   struct {
 327     long x_scnlen;              /* section length */
 328     unsigned short x_nreloc;    /* # relocation entries */
 329     unsigned short x_nlinno;    /* # line numbers */
 330   } x_scn;
 331
 332   struct {
 333     long                x_tvfill; /* tv fill value */
 334     unsigned short      x_tvlen; /* length of .tv */
 335     unsigned short      x_tvran[2]; /* tv range */
 336   } x_tv;                       /* info about .tv section (in auxent of symbol .tv)) */
 337 };
 338
 339 #define SYMENT  struct external_syment
 340 #define SYMESZ  20
 341 #define AUXENT  union external_auxent
 342 #define AUXESZ  20
 343
 344
 345 /********************** RELOCATION DIRECTIVES **********************/
 346
 347 struct external_reloc {
 348   char r_vaddr[4];
 349   char r_symndx[4];
 350   char r_type[2];
 351   char r_offset[2];
 352 };
 353
 354 struct internal_reloc {
 355   long r_vaddr;         /* Virtual address of reference */
 356   long r_symndx;        /* Index into symbol table      */
 357   unsigned short r_type; /* Relocation type             */
 358   unsigned short r_offset; /* Hi 16 bits of constant       */
 359 };
 360
 361 /* Only values of r_type GNU/88k cares about */
 362 #define R_PCR16L 128
 363 #define R_PCR26L 129
 364 #define R_VRT16  130
 365 #define R_HVRT16 131
 366 #define R_LVRT16 132
 367 #define R_VRT32  133
 368
 369
 370
 371
 372 #define RELOC struct external_reloc
 373 #define RELSZ  12
 374
 375 #define DEFAULT_SECTION_ALIGNMENT 8 /* double word */