| 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 |