1 /* ECOFF support on MIPS machines. 2 coff/ecoff.h must be included before this file. 3 4 Copyright 1999, 2004 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 #define DO_NOT_DEFINE_AOUTHDR 21 #define L_LNNO_SIZE 4 22 #include "coff/external.h" 23 24 /* Magic numbers are defined in coff/ecoff.h. */ 25 #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \ 26 ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\ 27 ((x).f_magic!=MIPS_MAGIC_BIG) && \ 28 ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \ 29 ((x).f_magic!=MIPS_MAGIC_BIG2) && \ 30 ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \ 31 ((x).f_magic!=MIPS_MAGIC_BIG3)) 32 33 34 /********************** AOUT "OPTIONAL HEADER" **********************/ 35 36 typedef struct external_aouthdr 37 { 38 unsigned char magic[2]; /* type of file */ 39 unsigned char vstamp[2]; /* version stamp */ 40 unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/ 41 unsigned char dsize[4]; /* initialized data " " */ 42 unsigned char bsize[4]; /* uninitialized data " " */ 43 unsigned char entry[4]; /* entry pt. */ 44 unsigned char text_start[4]; /* base of text used for this file */ 45 unsigned char data_start[4]; /* base of data used for this file */ 46 unsigned char bss_start[4]; /* base of bss used for this file */ 47 unsigned char gprmask[4]; /* ?? */ 48 unsigned char cprmask[4][4]; /* ?? */ 49 unsigned char gp_value[4]; /* value for gp register */ 50 } AOUTHDR; 51 52 /* compute size of a header */ 53 54 #define AOUTSZ 56 55 #define AOUTHDRSZ 56 56 57 /********************** RELOCATION DIRECTIVES **********************/ 58 59 struct external_reloc 60 { 61 unsigned char r_vaddr[4]; 62 unsigned char r_bits[4]; 63 }; 64 65 #define RELOC struct external_reloc 66 #define RELSZ 8 67 68 /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants 69 are used to unpack the r_bits field. */ 70 71 #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 72 #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 73 74 #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 75 #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 76 77 #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 78 #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 79 80 /* Originally, ECOFF used four bits for the reloc type and had three 81 reserved bits. Irix 4 added another bit for the reloc type, which 82 was easy because it was big endian and one of the spare bits became 83 the new most significant bit. To make this also work for little 84 endian ECOFF, we need to wrap one of the reserved bits around to 85 become the most significant bit of the reloc type. */ 86 #define RELOC_BITS3_TYPE_BIG 0x3E 87 #define RELOC_BITS3_TYPE_SH_BIG 1 88 #define RELOC_BITS3_TYPE_LITTLE 0x78 89 #define RELOC_BITS3_TYPE_SH_LITTLE 3 90 #define RELOC_BITS3_TYPEHI_LITTLE 0x04 91 #define RELOC_BITS3_TYPEHI_SH_LITTLE 2 92 93 #define RELOC_BITS3_EXTERN_BIG 0x01 94 #define RELOC_BITS3_EXTERN_LITTLE 0x80 95 96 /* The r_type field in a reloc is one of the following values. I 97 don't know if any other values can appear. These seem to be all 98 that occur in the Ultrix 4.2 libraries. */ 99 #define MIPS_R_IGNORE 0 100 #define MIPS_R_REFHALF 1 101 #define MIPS_R_REFWORD 2 102 #define MIPS_R_JMPADDR 3 103 #define MIPS_R_REFHI 4 104 #define MIPS_R_REFLO 5 105 #define MIPS_R_GPREL 6 106 #define MIPS_R_LITERAL 7 107 108 /* FIXME: This relocation is used (internally only) to represent branches 109 when assembling. It should never appear in output files, and 110 be removed. (It used to be used for embedded-PIC support.) */ 111 #define MIPS_R_PCREL16 12 112 113 /********************** STABS **********************/ 114 115 #define MIPS_IS_STAB ECOFF_IS_STAB 116 #define MIPS_MARK_STAB ECOFF_MARK_STAB 117 #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB 118 119 /********************** SYMBOLIC INFORMATION **********************/ 120 121 /* Written by John Gilmore. */ 122 123 /* ECOFF uses COFF-like section structures, but its own symbol format. 124 This file defines the symbol format in fields whose size and alignment 125 will not vary on different host systems. */ 126 127 /* File header as a set of bytes */ 128 129 struct hdr_ext 130 { 131 unsigned char h_magic[2]; 132 unsigned char h_vstamp[2]; 133 unsigned char h_ilineMax[4]; 134 unsigned char h_cbLine[4]; 135 unsigned char h_cbLineOffset[4]; 136 unsigned char h_idnMax[4]; 137 unsigned char h_cbDnOffset[4]; 138 unsigned char h_ipdMax[4]; 139 unsigned char h_cbPdOffset[4]; 140 unsigned char h_isymMax[4]; 141 unsigned char h_cbSymOffset[4]; 142 unsigned char h_ioptMax[4]; 143 unsigned char h_cbOptOffset[4]; 144 unsigned char h_iauxMax[4]; 145 unsigned char h_cbAuxOffset[4]; 146 unsigned char h_issMax[4]; 147 unsigned char h_cbSsOffset[4]; 148 unsigned char h_issExtMax[4]; 149 unsigned char h_cbSsExtOffset[4]; 150 unsigned char h_ifdMax[4]; 151 unsigned char h_cbFdOffset[4]; 152 unsigned char h_crfd[4]; 153 unsigned char h_cbRfdOffset[4]; 154 unsigned char h_iextMax[4]; 155 unsigned char h_cbExtOffset[4]; 156 }; 157 158 /* File descriptor external record */ 159 160 struct fdr_ext 161 { 162 unsigned char f_adr[4]; 163 unsigned char f_rss[4]; 164 unsigned char f_issBase[4]; 165 unsigned char f_cbSs[4]; 166 unsigned char f_isymBase[4]; 167 unsigned char f_csym[4]; 168 unsigned char f_ilineBase[4]; 169 unsigned char f_cline[4]; 170 unsigned char f_ioptBase[4]; 171 unsigned char f_copt[4]; 172 unsigned char f_ipdFirst[2]; 173 unsigned char f_cpd[2]; 174 unsigned char f_iauxBase[4]; 175 unsigned char f_caux[4]; 176 unsigned char f_rfdBase[4]; 177 unsigned char f_crfd[4]; 178 unsigned char f_bits1[1]; 179 unsigned char f_bits2[3]; 180 unsigned char f_cbLineOffset[4]; 181 unsigned char f_cbLine[4]; 182 }; 183 184 #define FDR_BITS1_LANG_BIG 0xF8 185 #define FDR_BITS1_LANG_SH_BIG 3 186 #define FDR_BITS1_LANG_LITTLE 0x1F 187 #define FDR_BITS1_LANG_SH_LITTLE 0 188 189 #define FDR_BITS1_FMERGE_BIG 0x04 190 #define FDR_BITS1_FMERGE_LITTLE 0x20 191 192 #define FDR_BITS1_FREADIN_BIG 0x02 193 #define FDR_BITS1_FREADIN_LITTLE 0x40 194 195 #define FDR_BITS1_FBIGENDIAN_BIG 0x01 196 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 197 198 #define FDR_BITS2_GLEVEL_BIG 0xC0 199 #define FDR_BITS2_GLEVEL_SH_BIG 6 200 #define FDR_BITS2_GLEVEL_LITTLE 0x03 201 #define FDR_BITS2_GLEVEL_SH_LITTLE 0 202 203 /* We ignore the `reserved' field in bits2. */ 204 205 /* Procedure descriptor external record */ 206 207 struct pdr_ext 208 { 209 unsigned char p_adr[4]; 210 unsigned char p_isym[4]; 211 unsigned char p_iline[4]; 212 unsigned char p_regmask[4]; 213 unsigned char p_regoffset[4]; 214 unsigned char p_iopt[4]; 215 unsigned char p_fregmask[4]; 216 unsigned char p_fregoffset[4]; 217 unsigned char p_frameoffset[4]; 218 unsigned char p_framereg[2]; 219 unsigned char p_pcreg[2]; 220 unsigned char p_lnLow[4]; 221 unsigned char p_lnHigh[4]; 222 unsigned char p_cbLineOffset[4]; 223 }; 224 225 /* Runtime procedure table */ 226 227 struct rpdr_ext 228 { 229 unsigned char p_adr[4]; 230 unsigned char p_regmask[4]; 231 unsigned char p_regoffset[4]; 232 unsigned char p_fregmask[4]; 233 unsigned char p_fregoffset[4]; 234 unsigned char p_frameoffset[4]; 235 unsigned char p_framereg[2]; 236 unsigned char p_pcreg[2]; 237 unsigned char p_irpss[4]; 238 unsigned char p_reserved[4]; 239 unsigned char p_exception_info[4]; 240 }; 241 242 /* Line numbers */ 243 244 struct line_ext 245 { 246 unsigned char l_line[4]; 247 }; 248 249 /* Symbol external record */ 250 251 struct sym_ext 252 { 253 unsigned char s_iss[4]; 254 unsigned char s_value[4]; 255 unsigned char s_bits1[1]; 256 unsigned char s_bits2[1]; 257 unsigned char s_bits3[1]; 258 unsigned char s_bits4[1]; 259 }; 260 261 #define SYM_BITS1_ST_BIG 0xFC 262 #define SYM_BITS1_ST_SH_BIG 2 263 #define SYM_BITS1_ST_LITTLE 0x3F 264 #define SYM_BITS1_ST_SH_LITTLE 0 265 266 #define SYM_BITS1_SC_BIG 0x03 267 #define SYM_BITS1_SC_SH_LEFT_BIG 3 268 #define SYM_BITS1_SC_LITTLE 0xC0 269 #define SYM_BITS1_SC_SH_LITTLE 6 270 271 #define SYM_BITS2_SC_BIG 0xE0 272 #define SYM_BITS2_SC_SH_BIG 5 273 #define SYM_BITS2_SC_LITTLE 0x07 274 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 275 276 #define SYM_BITS2_RESERVED_BIG 0x10 277 #define SYM_BITS2_RESERVED_LITTLE 0x08 278 279 #define SYM_BITS2_INDEX_BIG 0x0F 280 #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 281 #define SYM_BITS2_INDEX_LITTLE 0xF0 282 #define SYM_BITS2_INDEX_SH_LITTLE 4 283 284 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 285 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 286 287 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 288 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 289 290 /* External symbol external record */ 291 292 struct ext_ext 293 { 294 unsigned char es_bits1[1]; 295 unsigned char es_bits2[1]; 296 unsigned char es_ifd[2]; 297 struct sym_ext es_asym; 298 }; 299 300 #define EXT_BITS1_JMPTBL_BIG 0x80 301 #define EXT_BITS1_JMPTBL_LITTLE 0x01 302 303 #define EXT_BITS1_COBOL_MAIN_BIG 0x40 304 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 305 306 #define EXT_BITS1_WEAKEXT_BIG 0x20 307 #define EXT_BITS1_WEAKEXT_LITTLE 0x04 308 309 /* Dense numbers external record */ 310 311 struct dnr_ext 312 { 313 unsigned char d_rfd[4]; 314 unsigned char d_index[4]; 315 }; 316 317 /* Relative file descriptor */ 318 319 struct rfd_ext 320 { 321 unsigned char rfd[4]; 322 }; 323 324 /* Optimizer symbol external record */ 325 326 struct opt_ext 327 { 328 unsigned char o_bits1[1]; 329 unsigned char o_bits2[1]; 330 unsigned char o_bits3[1]; 331 unsigned char o_bits4[1]; 332 struct rndx_ext o_rndx; 333 unsigned char o_offset[4]; 334 }; 335 336 #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 337 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 338 339 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 340 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 341 342 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 343 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 344