1 /* ECOFF support on Alpha machines. 2 coff/ecoff.h must be included before this file. 3 4 Copyright 2001, 2005 Free Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20 /********************** FILE HEADER **********************/ 21 22 struct external_filehdr 23 { 24 unsigned char f_magic[2]; /* magic number */ 25 unsigned char f_nscns[2]; /* number of sections */ 26 unsigned char f_timdat[4]; /* time & date stamp */ 27 unsigned char f_symptr[8]; /* file pointer to symtab */ 28 unsigned char f_nsyms[4]; /* number of symtab entries */ 29 unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ 30 unsigned char f_flags[2]; /* flags */ 31 }; 32 33 /* Magic numbers are defined in coff/ecoff.h. */ 34 #define ALPHA_ECOFF_BADMAG(x) \ 35 ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD) 36 37 #define ALPHA_ECOFF_COMPRESSEDMAG(x) \ 38 ((x).f_magic == ALPHA_MAGIC_COMPRESSED) 39 40 /* The object type is encoded in the f_flags. */ 41 #define F_ALPHA_OBJECT_TYPE_MASK 0x3000 42 #define F_ALPHA_NO_SHARED 0x1000 43 #define F_ALPHA_SHARABLE 0x2000 44 #define F_ALPHA_CALL_SHARED 0x3000 45 46 #define FILHDR struct external_filehdr 47 #define FILHSZ 24 48 49 /********************** AOUT "OPTIONAL HEADER" **********************/ 50 51 typedef struct external_aouthdr 52 { 53 unsigned char magic[2]; /* type of file */ 54 unsigned char vstamp[2]; /* version stamp */ 55 unsigned char bldrev[2]; /* ?? */ 56 unsigned char padding[2]; /* pad to quadword boundary */ 57 unsigned char tsize[8]; /* text size in bytes */ 58 unsigned char dsize[8]; /* initialized data " " */ 59 unsigned char bsize[8]; /* uninitialized data " " */ 60 unsigned char entry[8]; /* entry pt. */ 61 unsigned char text_start[8]; /* base of text used for this file */ 62 unsigned char data_start[8]; /* base of data used for this file */ 63 unsigned char bss_start[8]; /* base of bss used for this file */ 64 unsigned char gprmask[4]; /* bitmask of general registers used */ 65 unsigned char fprmask[4]; /* bitmask of floating point registers used */ 66 unsigned char gp_value[8]; /* value for gp register */ 67 } AOUTHDR; 68 69 /* compute size of a header */ 70 71 #define AOUTSZ 80 72 #define AOUTHDRSZ 80 73 74 /********************** SECTION HEADER **********************/ 75 76 struct external_scnhdr 77 { 78 unsigned char s_name[8]; /* section name */ 79 unsigned char s_paddr[8]; /* physical address, aliased s_nlib */ 80 unsigned char s_vaddr[8]; /* virtual address */ 81 unsigned char s_size[8]; /* section size */ 82 unsigned char s_scnptr[8]; /* file ptr to raw data for section */ 83 unsigned char s_relptr[8]; /* file ptr to relocation */ 84 unsigned char s_lnnoptr[8]; /* file ptr to line numbers */ 85 unsigned char s_nreloc[2]; /* number of relocation entries */ 86 unsigned char s_nlnno[2]; /* number of line number entries*/ 87 unsigned char s_flags[4]; /* flags */ 88 }; 89 90 #define SCNHDR struct external_scnhdr 91 #define SCNHSZ 64 92 93 /********************** RELOCATION DIRECTIVES **********************/ 94 95 struct external_reloc 96 { 97 unsigned char r_vaddr[8]; 98 unsigned char r_symndx[4]; 99 unsigned char r_bits[4]; 100 }; 101 102 #define RELOC struct external_reloc 103 #define RELSZ 16 104 105 /* Constants to unpack the r_bits field. The Alpha seems to always be 106 little endian, so I haven't bothered to define big endian variants 107 of these. */ 108 109 #define RELOC_BITS0_TYPE_LITTLE 0xff 110 #define RELOC_BITS0_TYPE_SH_LITTLE 0 111 112 #define RELOC_BITS1_EXTERN_LITTLE 0x01 113 114 #define RELOC_BITS1_OFFSET_LITTLE 0x7e 115 #define RELOC_BITS1_OFFSET_SH_LITTLE 1 116 117 #define RELOC_BITS1_RESERVED_LITTLE 0x80 118 #define RELOC_BITS1_RESERVED_SH_LITTLE 7 119 #define RELOC_BITS2_RESERVED_LITTLE 0xff 120 #define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE 1 121 #define RELOC_BITS3_RESERVED_LITTLE 0x03 122 #define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE 9 123 124 #define RELOC_BITS3_SIZE_LITTLE 0xfc 125 #define RELOC_BITS3_SIZE_SH_LITTLE 2 126 127 /* The r_type field in a reloc is one of the following values. */ 128 #define ALPHA_R_IGNORE 0 129 #define ALPHA_R_REFLONG 1 130 #define ALPHA_R_REFQUAD 2 131 #define ALPHA_R_GPREL32 3 132 #define ALPHA_R_LITERAL 4 133 #define ALPHA_R_LITUSE 5 134 #define ALPHA_R_GPDISP 6 135 #define ALPHA_R_BRADDR 7 136 #define ALPHA_R_HINT 8 137 #define ALPHA_R_SREL16 9 138 #define ALPHA_R_SREL32 10 139 #define ALPHA_R_SREL64 11 140 #define ALPHA_R_OP_PUSH 12 141 #define ALPHA_R_OP_STORE 13 142 #define ALPHA_R_OP_PSUB 14 143 #define ALPHA_R_OP_PRSHIFT 15 144 #define ALPHA_R_GPVALUE 16 145 #define ALPHA_R_GPRELHIGH 17 146 #define ALPHA_R_GPRELLOW 18 147 #define ALPHA_R_IMMED 19 148 149 /* Overloaded reloc value used by Net- and OpenBSD. */ 150 #define ALPHA_R_LITERALSLEAZY 17 151 152 /* With ALPHA_R_LITUSE, the r_size field is one of the following values. */ 153 #define ALPHA_R_LU_BASE 1 154 #define ALPHA_R_LU_BYTOFF 2 155 #define ALPHA_R_LU_JSR 3 156 157 /* With ALPHA_R_IMMED, the r_size field is one of the following values. */ 158 #define ALPHA_R_IMMED_GP_16 1 159 #define ALPHA_R_IMMED_GP_HI32 2 160 #define ALPHA_R_IMMED_SCN_HI32 3 161 #define ALPHA_R_IMMED_BR_HI32 4 162 #define ALPHA_R_IMMED_LO32 5 163 164 /********************** SYMBOLIC INFORMATION **********************/ 165 166 /* Written by John Gilmore. */ 167 168 /* ECOFF uses COFF-like section structures, but its own symbol format. 169 This file defines the symbol format in fields whose size and alignment 170 will not vary on different host systems. */ 171 172 /* File header as a set of bytes */ 173 174 struct hdr_ext 175 { 176 unsigned char h_magic[2]; 177 unsigned char h_vstamp[2]; 178 unsigned char h_ilineMax[4]; 179 unsigned char h_idnMax[4]; 180 unsigned char h_ipdMax[4]; 181 unsigned char h_isymMax[4]; 182 unsigned char h_ioptMax[4]; 183 unsigned char h_iauxMax[4]; 184 unsigned char h_issMax[4]; 185 unsigned char h_issExtMax[4]; 186 unsigned char h_ifdMax[4]; 187 unsigned char h_crfd[4]; 188 unsigned char h_iextMax[4]; 189 unsigned char h_cbLine[8]; 190 unsigned char h_cbLineOffset[8]; 191 unsigned char h_cbDnOffset[8]; 192 unsigned char h_cbPdOffset[8]; 193 unsigned char h_cbSymOffset[8]; 194 unsigned char h_cbOptOffset[8]; 195 unsigned char h_cbAuxOffset[8]; 196 unsigned char h_cbSsOffset[8]; 197 unsigned char h_cbSsExtOffset[8]; 198 unsigned char h_cbFdOffset[8]; 199 unsigned char h_cbRfdOffset[8]; 200 unsigned char h_cbExtOffset[8]; 201 }; 202 203 /* File descriptor external record */ 204 205 struct fdr_ext 206 { 207 unsigned char f_adr[8]; 208 unsigned char f_cbLineOffset[8]; 209 unsigned char f_cbLine[8]; 210 unsigned char f_cbSs[8]; 211 unsigned char f_rss[4]; 212 unsigned char f_issBase[4]; 213 unsigned char f_isymBase[4]; 214 unsigned char f_csym[4]; 215 unsigned char f_ilineBase[4]; 216 unsigned char f_cline[4]; 217 unsigned char f_ioptBase[4]; 218 unsigned char f_copt[4]; 219 unsigned char f_ipdFirst[4]; 220 unsigned char f_cpd[4]; 221 unsigned char f_iauxBase[4]; 222 unsigned char f_caux[4]; 223 unsigned char f_rfdBase[4]; 224 unsigned char f_crfd[4]; 225 unsigned char f_bits1[1]; 226 unsigned char f_bits2[3]; 227 unsigned char f_padding[4]; 228 }; 229 230 #define FDR_BITS1_LANG_BIG 0xF8 231 #define FDR_BITS1_LANG_SH_BIG 3 232 #define FDR_BITS1_LANG_LITTLE 0x1F 233 #define FDR_BITS1_LANG_SH_LITTLE 0 234 235 #define FDR_BITS1_FMERGE_BIG 0x04 236 #define FDR_BITS1_FMERGE_LITTLE 0x20 237 238 #define FDR_BITS1_FREADIN_BIG 0x02 239 #define FDR_BITS1_FREADIN_LITTLE 0x40 240 241 #define FDR_BITS1_FBIGENDIAN_BIG 0x01 242 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 243 244 #define FDR_BITS2_GLEVEL_BIG 0xC0 245 #define FDR_BITS2_GLEVEL_SH_BIG 6 246 #define FDR_BITS2_GLEVEL_LITTLE 0x03 247 #define FDR_BITS2_GLEVEL_SH_LITTLE 0 248 249 /* We ignore the `reserved' field in bits2. */ 250 251 /* Procedure descriptor external record */ 252 253 struct pdr_ext { 254 unsigned char p_adr[8]; 255 unsigned char p_cbLineOffset[8]; 256 unsigned char p_isym[4]; 257 unsigned char p_iline[4]; 258 unsigned char p_regmask[4]; 259 unsigned char p_regoffset[4]; 260 unsigned char p_iopt[4]; 261 unsigned char p_fregmask[4]; 262 unsigned char p_fregoffset[4]; 263 unsigned char p_frameoffset[4]; 264 unsigned char p_lnLow[4]; 265 unsigned char p_lnHigh[4]; 266 unsigned char p_gp_prologue[1]; 267 unsigned char p_bits1[1]; 268 unsigned char p_bits2[1]; 269 unsigned char p_localoff[1]; 270 unsigned char p_framereg[2]; 271 unsigned char p_pcreg[2]; 272 }; 273 274 #define PDR_BITS1_GP_USED_BIG 0x80 275 #define PDR_BITS1_REG_FRAME_BIG 0x40 276 #define PDR_BITS1_PROF_BIG 0x20 277 #define PDR_BITS1_RESERVED_BIG 0x1f 278 #define PDR_BITS1_RESERVED_SH_LEFT_BIG 8 279 #define PDR_BITS2_RESERVED_BIG 0xff 280 #define PDR_BITS2_RESERVED_SH_BIG 0 281 282 #define PDR_BITS1_GP_USED_LITTLE 0x01 283 #define PDR_BITS1_REG_FRAME_LITTLE 0x02 284 #define PDR_BITS1_PROF_LITTLE 0x04 285 #define PDR_BITS1_RESERVED_LITTLE 0xf8 286 #define PDR_BITS1_RESERVED_SH_LITTLE 3 287 #define PDR_BITS2_RESERVED_LITTLE 0xff 288 #define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5 289 290 /* Line numbers */ 291 292 struct line_ext { 293 unsigned char l_line[4]; 294 }; 295 296 /* Symbol external record */ 297 298 struct sym_ext { 299 unsigned char s_value[8]; 300 unsigned char s_iss[4]; 301 unsigned char s_bits1[1]; 302 unsigned char s_bits2[1]; 303 unsigned char s_bits3[1]; 304 unsigned char s_bits4[1]; 305 }; 306 307 #define SYM_BITS1_ST_BIG 0xFC 308 #define SYM_BITS1_ST_SH_BIG 2 309 #define SYM_BITS1_ST_LITTLE 0x3F 310 #define SYM_BITS1_ST_SH_LITTLE 0 311 312 #define SYM_BITS1_SC_BIG 0x03 313 #define SYM_BITS1_SC_SH_LEFT_BIG 3 314 #define SYM_BITS1_SC_LITTLE 0xC0 315 #define SYM_BITS1_SC_SH_LITTLE 6 316 317 #define SYM_BITS2_SC_BIG 0xE0 318 #define SYM_BITS2_SC_SH_BIG 5 319 #define SYM_BITS2_SC_LITTLE 0x07 320 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 321 322 #define SYM_BITS2_RESERVED_BIG 0x10 323 #define SYM_BITS2_RESERVED_LITTLE 0x08 324 325 #define SYM_BITS2_INDEX_BIG 0x0F 326 #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 327 #define SYM_BITS2_INDEX_LITTLE 0xF0 328 #define SYM_BITS2_INDEX_SH_LITTLE 4 329 330 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 331 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 332 333 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 334 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 335 336 /* External symbol external record */ 337 338 struct ext_ext { 339 struct sym_ext es_asym; 340 unsigned char es_bits1[1]; 341 unsigned char es_bits2[3]; 342 unsigned char es_ifd[4]; 343 }; 344 345 #define EXT_BITS1_JMPTBL_BIG 0x80 346 #define EXT_BITS1_JMPTBL_LITTLE 0x01 347 348 #define EXT_BITS1_COBOL_MAIN_BIG 0x40 349 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 350 351 #define EXT_BITS1_WEAKEXT_BIG 0x20 352 #define EXT_BITS1_WEAKEXT_LITTLE 0x04 353 354 /* Dense numbers external record */ 355 356 struct dnr_ext { 357 unsigned char d_rfd[4]; 358 unsigned char d_index[4]; 359 }; 360 361 /* Relative file descriptor */ 362 363 struct rfd_ext { 364 unsigned char rfd[4]; 365 }; 366 367 /* Optimizer symbol external record */ 368 369 struct opt_ext { 370 unsigned char o_bits1[1]; 371 unsigned char o_bits2[1]; 372 unsigned char o_bits3[1]; 373 unsigned char o_bits4[1]; 374 struct rndx_ext o_rndx; 375 unsigned char o_offset[4]; 376 }; 377 378 #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 379 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 380 381 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 382 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 383 384 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 385 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 386