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
  17 /* Bits for f_flags:
  18  *      F_RELFLG        relocation info stripped from file
  19  *      F_EXEC          file is executable (no unresolved external references)
  20  *      F_LNNO          line numbers stripped from file
  21  *      F_LSYMS         local symbols stripped from file
  22  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  23  */
  24
  25 #define F_RELFLG        (0x0001)
  26 #define F_EXEC          (0x0002)
  27 #define F_LNNO          (0x0004)
  28 #define F_LSYMS         (0x0008)
  29
  30
  31
  32 #define I386MAGIC       0x14c
  33 #define I386BADMAG(x) (((x).f_magic!=I386MAGIC))
  34
  35
  36 #define FILHDR  struct external_filehdr
  37 #define FILHSZ  sizeof(FILHDR)
  38
  39
  40 /********************** AOUT "OPTIONAL HEADER" **********************/
  41
  42
  43 typedef struct
  44 {
  45   char  magic[2];               /* type of file                         */
  46   char  vstamp[2];              /* version stamp                        */
  47   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  48   char  dsize[4];               /* initialized data "  "                */
  49   char  bsize[4];               /* uninitialized data "   "             */
  50   char  entry[4];               /* entry pt.                            */
  51   char  text_start[4];          /* base of text used for this file */
  52   char  data_start[4];          /* base of data used for this file */
  53 }
  54 AOUTHDR;
  55
  56 #define AOUTSZ (sizeof(AOUTHDR))
  57
  58
  59 /********************** STORAGE CLASSES **********************/
  60
  61 #define C_EFCN          -1      /* physical end of function     */
  62 #define C_NULL          0
  63 #define C_AUTO          1       /* automatic variable           */
  64 #define C_EXT           2       /* external symbol              */
  65 #define C_STAT          3       /* static                       */
  66 #define C_REG           4       /* register variable            */
  67 #define C_EXTDEF        5       /* external definition          */
  68 #define C_LABEL         6       /* label                        */
  69 #define C_ULABEL        7       /* undefined label              */
  70 #define C_MOS           8       /* member of structure          */
  71 #define C_ARG           9       /* function argument            */
  72 #define C_STRTAG        10      /* structure tag                */
  73 #define C_MOU           11      /* member of union              */
  74 #define C_UNTAG         12      /* union tag                    */
  75 #define C_TPDEF         13      /* type definition              */
  76 #define C_USTATIC       14      /* undefined static             */
  77 #define C_ENTAG         15      /* enumeration tag              */
  78 #define C_MOE           16      /* member of enumeration        */
  79 #define C_REGPARM       17      /* register parameter           */
  80 #define C_FIELD         18      /* bit field                    */
  81 #define C_AUTOARG       19      /* auto argument                */
  82 #define C_LASTENT       20      /* dummy entry (end of block)   */
  83 #define C_BLOCK         100     /* ".bb" or ".eb"               */
  84 #define C_FCN           101     /* ".bf" or ".ef"               */
  85 #define C_EOS           102     /* end of structure             */
  86 #define C_FILE          103     /* file name                    */
  87 #define C_LINE          104     /* line # reformatted as symbol table entry */
  88 #define C_ALIAS         105     /* duplicate tag                */
  89 #define C_HIDDEN        106     /* ext symbol in dmert public lib */
  90
  91 /********************** SECTION HEADER **********************/
  92
  93
  94 struct external_scnhdr {
  95         char            s_name[8];      /* section name                 */
  96         char            s_paddr[4];     /* physical address, aliased s_nlib */
  97         char            s_vaddr[4];     /* virtual address              */
  98         char            s_size[4];      /* section size                 */
  99         char            s_scnptr[4];    /* file ptr to raw data for section */
 100         char            s_relptr[4];    /* file ptr to relocation       */
 101         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 102         char            s_nreloc[2];    /* number of relocation entries */
 103         char            s_nlnno[2];     /* number of line number entries*/
 104         char            s_flags[4];     /* flags                        */
 105 };
 106
 107 /*
 108  * names of "special" sections
 109  */
 110 #define _TEXT   ".text"
 111 #define _DATA   ".data"
 112 #define _BSS    ".bss"
 113 #define _COMMENT ".comment"
 114
 115 /*
 116  * s_flags "type"
 117  */
 118 #define STYP_REG         (0x0000) /* "regular": allocated, relocated, loaded */
 119 #define STYP_DSECT       (0x0001) /* "dummy":  relocated only*/
 120 #define STYP_NOLOAD      (0x0002) /* "noload": allocated, relocated, not loaded */
 121 #define STYP_GROUP       (0x0004) /* "grouped": formed of input sections */
 122 #define STYP_PAD         (0x0008) /* "padding": not allocated, not relocated, loaded */
 123 #define STYP_COPY        (0x0010) /* "copy": for decision function used by field update;  not allocated, not relocated,
 124                                      loaded; reloc & lineno entries processed normally */
 125 #define STYP_TEXT        (0x0020) /* section contains text only */
 126 #define S_SHRSEG         (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
 127                                      will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
 128                                      update all process invocations. */
 129 #define STYP_DATA        (0x0040) /* section contains data only */
 130 #define STYP_BSS         (0x0080) /* section contains bss only */
 131 #define S_NEWFCN         (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
 132 #define STYP_INFO        (0x0200) /* comment: not allocated not relocated, not loaded */
 133 #define STYP_OVER        (0x0400) /* overlay: relocated not allocated or loaded */
 134 #define STYP_LIB         (0x0800) /* for .lib: same as INFO */
 135 #define STYP_MERGE       (0x2000) /* merge section -- combines with text, data or bss sections only */
 136 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
 137                                      word of contiguous bytes beginning on a word boundary. */
 138
 139 #define SCNHDR  struct external_scnhdr
 140 #define SCNHSZ  sizeof(SCNHDR)
 141
 142
 143 /********************** LINE NUMBERS **********************/
 144
 145 /* 1 line number entry for every "breakpointable" source line in a section.
 146  * Line numbers are grouped on a per function basis; first entry in a function
 147  * grouping will have l_lnno = 0 and in place of physical address will be the
 148  * symbol table index of the function name.
 149  */
 150 struct external_lineno {
 151         union {
 152                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 153                 char l_paddr[4];        /* (physical) address of line number    */
 154         } l_addr;
 155         char l_lnno[2]; /* line number          */
 156 };
 157
 158
 159 #define LINENO  struct external_lineno
 160 #define LINESZ  6
 161
 162
 163 /********************** SYMBOLS **********************/
 164
 165 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 166 #define E_FILNMLEN      14      /* # characters in a file name          */
 167 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 168
 169 struct external_syment
 170 {
 171   union {
 172     char e_name[E_SYMNMLEN];
 173     struct {
 174       char e_zeroes[4];
 175       char e_offset[4];
 176     } e;
 177   } e;
 178   char e_value[4];
 179   char e_scnum[2];
 180   char e_type[2];
 181   char e_sclass[1];
 182   char e_numaux[1];
 183 };
 184
 185
 186 /*#define n_name                _n._n_name
 187 #define n_ptr           _n._n_nptr[1]
 188 #define n_zeroes        _n._n_n._n_zeroes
 189 #define n_offset        _n._n_n._n_offset
 190 */
 191
 192 /*
 193  * Relocatable symbols have number of the section in which they are defined,
 194  * or one of the following:
 195  */
 196 #define N_UNDEF ((short)0)  /* undefined symbol */
 197 #define N_ABS   ((short)-1) /* value of symbol is absolute */
 198 #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
 199 #define N_TV    ((short)-3) /* indicates symbol needs preload transfer vector */
 200 #define P_TV    ((short)-4) /* indicates symbol needs postload transfer vector*/
 201
 202 /*
 203  * Type of a symbol, in low 4 bits of the word
 204  */
 205 #define T_NULL          0
 206 #define T_VOID          1       /* function argument (only used by compiler) */
 207 #define T_CHAR          2       /* character            */
 208 #define T_SHORT         3       /* short integer        */
 209 #define T_INT           4       /* integer              */
 210 #define T_LONG          5       /* long integer         */
 211 #define T_FLOAT         6       /* floating point       */
 212 #define T_DOUBLE        7       /* double word          */
 213 #define T_STRUCT        8       /* structure            */
 214 #define T_UNION         9       /* union                */
 215 #define T_ENUM          10      /* enumeration          */
 216 #define T_MOE           11      /* member of enumeration*/
 217 #define T_UCHAR         12      /* unsigned character   */
 218 #define T_USHORT        13      /* unsigned short       */
 219 #define T_UINT          14      /* unsigned integer     */
 220 #define T_ULONG         15      /* unsigned long        */
 221 #define T_LNGDBL        16      /* long double          */
 222
 223 /*
 224  * derived types, in n_type
 225 */
 226 #define DT_NON          (0)     /* no derived type */
 227 #define DT_PTR          (1)     /* pointer */
 228 #define DT_FCN          (2)     /* function */
 229 #define DT_ARY          (3)     /* array */
 230
 231 #define N_BTMASK        (0xf)
 232 #define N_TMASK         (0x30)
 233 #define N_BTSHFT        (4)
 234 #define N_TSHIFT        (2)
 235
 236 #define BTYPE(x)        ((x) & N_BTMASK)
 237
 238 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 239 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 240 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 241
 242 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 243
 244 union external_auxent {
 245         struct {
 246                 char x_tagndx[4];       /* str, un, or enum tag indx */
 247                 union {
 248                         struct {
 249                             char  x_lnno[2]; /* declaration line number */
 250                             char  x_size[2]; /* str/union/array size */
 251                         } x_lnsz;
 252                         char x_fsize[4];        /* size of function */
 253                 } x_misc;
 254                 union {
 255                         struct {                /* if ISFCN, tag, or .bb */
 256                             char x_lnnoptr[4];  /* ptr to fcn line # */
 257                             char x_endndx[4];   /* entry ndx past block end */
 258                         } x_fcn;
 259                         struct {                /* if ISARY, up to 4 dimen. */
 260                             char x_dimen[E_DIMNUM][2];
 261                         } x_ary;
 262                 } x_fcnary;
 263                 char x_tvndx[2];                /* tv index */
 264         } x_sym;
 265
 266         union {
 267                 char x_fname[E_FILNMLEN];
 268                 struct {
 269                         char x_zeroes[4];
 270                         char x_offset[4];
 271                 } x_n;
 272         } x_file;
 273
 274         struct {
 275                 char x_scnlen[4];                       /* section length */
 276                 char x_nreloc[2];       /* # relocation entries */
 277                 char x_nlinno[2];       /* # line numbers */
 278         } x_scn;
 279
 280         struct {
 281                 char x_tvfill[4];       /* tv fill value */
 282                 char x_tvlen[2];        /* length of .tv */
 283                 char x_tvran[2][2];     /* tv range */
 284         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 285
 286
 287 };
 288
 289 #define SYMENT  struct external_syment
 290 #define SYMESZ  18
 291 #define AUXENT  union external_auxent
 292 #define AUXESZ  18
 293
 294
 295 #       define _ETEXT   "etext"
 296
 297
 298 /********************** RELOCATION DIRECTIVES **********************/
 299
 300
 301
 302 struct external_reloc {
 303   char r_vaddr[4];
 304   char r_symndx[4];
 305   char r_type[2];
 306 };
 307
 308
 309 #define RELOC struct external_reloc
 310 #define RELSZ 10
 311
 312 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 313 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 314 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
 315 /* For new sections we havn't heard of before */
 316 #define DEFAULT_SECTION_ALIGNMENT 4