1 /* ECOFF support on MIPS machines. 2 coff/ecoff.h must be included before this file. 3 4 Copyright (C) 1999-2024 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 3 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, 19 MA 02110-1301, USA. */ 20 21 #define DO_NOT_DEFINE_AOUTHDR 22 #define L_LNNO_SIZE 4 23 #include "coff/external.h" 24 25 /* Magic numbers are defined in coff/ecoff.h. */ 26 #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \ 27 ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\ 28 ((x).f_magic!=MIPS_MAGIC_BIG) && \ 29 ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \ 30 ((x).f_magic!=MIPS_MAGIC_BIG2) && \ 31 ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \ 32 ((x).f_magic!=MIPS_MAGIC_BIG3)) 33 34 35 /********************** AOUT "OPTIONAL HEADER" **********************/ 36 37 typedef struct external_aouthdr 38 { 39 unsigned char magic[2]; /* type of file */ 40 unsigned char vstamp[2]; /* version stamp */ 41 unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/ 42 unsigned char dsize[4]; /* initialized data " " */ 43 unsigned char bsize[4]; /* uninitialized data " " */ 44 unsigned char entry[4]; /* entry pt. */ 45 unsigned char text_start[4]; /* base of text used for this file */ 46 unsigned char data_start[4]; /* base of data used for this file */ 47 unsigned char bss_start[4]; /* base of bss used for this file */ 48 unsigned char gprmask[4]; /* ?? */ 49 unsigned char cprmask[4][4]; /* ?? */ 50 unsigned char gp_value[4]; /* value for gp register */ 51 } AOUTHDR; 52 53 /* compute size of a header */ 54 55 #define AOUTSZ 56 56 #define AOUTHDRSZ 56 57 58 /********************** RELOCATION DIRECTIVES **********************/ 59 60 struct external_reloc 61 { 62 unsigned char r_vaddr[4]; 63 unsigned char r_bits[4]; 64 }; 65 66 #define RELOC struct external_reloc 67 #define RELSZ 8 68 69 /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants 70 are used to unpack the r_bits field. */ 71 72 #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 73 #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 74 75 #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 76 #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 77 78 #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 79 #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 80 81 /* Originally, ECOFF used four bits for the reloc type and had three 82 reserved bits. Irix 4 added another bit for the reloc type, which 83 was easy because it was big endian and one of the spare bits became 84 the new most significant bit. To make this also work for little 85 endian ECOFF, we need to wrap one of the reserved bits around to 86 become the most significant bit of the reloc type. */ 87 #define RELOC_BITS3_TYPE_BIG 0x3E 88 #define RELOC_BITS3_TYPE_SH_BIG 1 89 #define RELOC_BITS3_TYPE_LITTLE 0x78 90 #define RELOC_BITS3_TYPE_SH_LITTLE 3 91 #define RELOC_BITS3_TYPEHI_LITTLE 0x04 92 #define RELOC_BITS3_TYPEHI_SH_LITTLE 2 93 94 #define RELOC_BITS3_EXTERN_BIG 0x01 95 #define RELOC_BITS3_EXTERN_LITTLE 0x80 96 97 /* The r_type field in a reloc is one of the following values. I 98 don't know if any other values can appear. These seem to be all 99 that occur in the Ultrix 4.2 libraries. */ 100 #define MIPS_R_IGNORE 0 101 #define MIPS_R_REFHALF 1 102 #define MIPS_R_REFWORD 2 103 #define MIPS_R_JMPADDR 3 104 #define MIPS_R_REFHI 4 105 #define MIPS_R_REFLO 5 106 #define MIPS_R_GPREL 6 107 #define MIPS_R_LITERAL 7 108 109 /* FIXME: This relocation is used (internally only) to represent branches 110 when assembling. It should never appear in output files, and 111 be removed. (It used to be used for embedded-PIC support.) */ 112 #define MIPS_R_PCREL16 12 113 114 /********************** STABS **********************/ 115 116 #define MIPS_IS_STAB ECOFF_IS_STAB 117 #define MIPS_MARK_STAB ECOFF_MARK_STAB 118 #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB 119 120 /********************** SYMBOLIC INFORMATION **********************/ 121 122 /* Written by John Gilmore. */ 123 124 /* ECOFF uses COFF-like section structures, but its own symbol format. 125 This file defines the symbol format in fields whose size and alignment 126 will not vary on different host systems. */ 127 128 /* File header as a set of bytes */ 129 130 struct hdr_ext 131 { 132 unsigned char h_magic[2]; 133 unsigned char h_vstamp[2]; 134 unsigned char h_ilineMax[4]; 135 unsigned char h_cbLine[4]; 136 unsigned char h_cbLineOffset[4]; 137 unsigned char h_idnMax[4]; 138 unsigned char h_cbDnOffset[4]; 139 unsigned char h_ipdMax[4]; 140 unsigned char h_cbPdOffset[4]; 141 unsigned char h_isymMax[4]; 142 unsigned char h_cbSymOffset[4]; 143 unsigned char h_ioptMax[4]; 144 unsigned char h_cbOptOffset[4]; 145 unsigned char h_iauxMax[4]; 146 unsigned char h_cbAuxOffset[4]; 147 unsigned char h_issMax[4]; 148 unsigned char h_cbSsOffset[4]; 149 unsigned char h_issExtMax[4]; 150 unsigned char h_cbSsExtOffset[4]; 151 unsigned char h_ifdMax[4]; 152 unsigned char h_cbFdOffset[4]; 153 unsigned char h_crfd[4]; 154 unsigned char h_cbRfdOffset[4]; 155 unsigned char h_iextMax[4]; 156 unsigned char h_cbExtOffset[4]; 157 }; 158 159 /* File descriptor external record */ 160 161 struct fdr_ext 162 { 163 unsigned char f_adr[4]; 164 unsigned char f_rss[4]; 165 unsigned char f_issBase[4]; 166 unsigned char f_cbSs[4]; 167 unsigned char f_isymBase[4]; 168 unsigned char f_csym[4]; 169 unsigned char f_ilineBase[4]; 170 unsigned char f_cline[4]; 171 unsigned char f_ioptBase[4]; 172 unsigned char f_copt[4]; 173 unsigned char f_ipdFirst[2]; 174 unsigned char f_cpd[2]; 175 unsigned char f_iauxBase[4]; 176 unsigned char f_caux[4]; 177 unsigned char f_rfdBase[4]; 178 unsigned char f_crfd[4]; 179 unsigned char f_bits1[1]; 180 unsigned char f_bits2[3]; 181 unsigned char f_cbLineOffset[4]; 182 unsigned char f_cbLine[4]; 183 }; 184 185 #define FDR_BITS1_LANG_BIG 0xF8 186 #define FDR_BITS1_LANG_SH_BIG 3 187 #define FDR_BITS1_LANG_LITTLE 0x1F 188 #define FDR_BITS1_LANG_SH_LITTLE 0 189 190 #define FDR_BITS1_FMERGE_BIG 0x04 191 #define FDR_BITS1_FMERGE_LITTLE 0x20 192 193 #define FDR_BITS1_FREADIN_BIG 0x02 194 #define FDR_BITS1_FREADIN_LITTLE 0x40 195 196 #define FDR_BITS1_FBIGENDIAN_BIG 0x01 197 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 198 199 #define FDR_BITS2_GLEVEL_BIG 0xC0 200 #define FDR_BITS2_GLEVEL_SH_BIG 6 201 #define FDR_BITS2_GLEVEL_LITTLE 0x03 202 #define FDR_BITS2_GLEVEL_SH_LITTLE 0 203 204 /* We ignore the `reserved' field in bits2. */ 205 206 /* Procedure descriptor external record */ 207 208 struct pdr_ext 209 { 210 unsigned char p_adr[4]; 211 unsigned char p_isym[4]; 212 unsigned char p_iline[4]; 213 unsigned char p_regmask[4]; 214 unsigned char p_regoffset[4]; 215 unsigned char p_iopt[4]; 216 unsigned char p_fregmask[4]; 217 unsigned char p_fregoffset[4]; 218 unsigned char p_frameoffset[4]; 219 unsigned char p_framereg[2]; 220 unsigned char p_pcreg[2]; 221 unsigned char p_lnLow[4]; 222 unsigned char p_lnHigh[4]; 223 unsigned char p_cbLineOffset[4]; 224 }; 225 226 /* Runtime procedure table */ 227 228 struct rpdr_ext 229 { 230 unsigned char p_adr[4]; 231 unsigned char p_regmask[4]; 232 unsigned char p_regoffset[4]; 233 unsigned char p_fregmask[4]; 234 unsigned char p_fregoffset[4]; 235 unsigned char p_frameoffset[4]; 236 unsigned char p_framereg[2]; 237 unsigned char p_pcreg[2]; 238 unsigned char p_irpss[4]; 239 unsigned char p_reserved[4]; 240 unsigned char p_exception_info[4]; 241 }; 242 243 /* Line numbers */ 244 245 struct line_ext 246 { 247 unsigned char l_line[4]; 248 }; 249 250 /* Symbol external record */ 251 252 struct sym_ext 253 { 254 unsigned char s_iss[4]; 255 unsigned char s_value[4]; 256 unsigned char s_bits1[1]; 257 unsigned char s_bits2[1]; 258 unsigned char s_bits3[1]; 259 unsigned char s_bits4[1]; 260 }; 261 262 #define SYM_BITS1_ST_BIG 0xFC 263 #define SYM_BITS1_ST_SH_BIG 2 264 #define SYM_BITS1_ST_LITTLE 0x3F 265 #define SYM_BITS1_ST_SH_LITTLE 0 266 267 #define SYM_BITS1_SC_BIG 0x03 268 #define SYM_BITS1_SC_SH_LEFT_BIG 3 269 #define SYM_BITS1_SC_LITTLE 0xC0 270 #define SYM_BITS1_SC_SH_LITTLE 6 271 272 #define SYM_BITS2_SC_BIG 0xE0 273 #define SYM_BITS2_SC_SH_BIG 5 274 #define SYM_BITS2_SC_LITTLE 0x07 275 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 276 277 #define SYM_BITS2_RESERVED_BIG 0x10 278 #define SYM_BITS2_RESERVED_LITTLE 0x08 279 280 #define SYM_BITS2_INDEX_BIG 0x0F 281 #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 282 #define SYM_BITS2_INDEX_LITTLE 0xF0 283 #define SYM_BITS2_INDEX_SH_LITTLE 4 284 285 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 286 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 287 288 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 289 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 290 291 /* External symbol external record */ 292 293 struct ext_ext 294 { 295 unsigned char es_bits1[1]; 296 unsigned char es_bits2[1]; 297 unsigned char es_ifd[2]; 298 struct sym_ext es_asym; 299 }; 300 301 #define EXT_BITS1_JMPTBL_BIG 0x80 302 #define EXT_BITS1_JMPTBL_LITTLE 0x01 303 304 #define EXT_BITS1_COBOL_MAIN_BIG 0x40 305 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 306 307 #define EXT_BITS1_WEAKEXT_BIG 0x20 308 #define EXT_BITS1_WEAKEXT_LITTLE 0x04 309 310 /* Dense numbers external record */ 311 312 struct dnr_ext 313 { 314 unsigned char d_rfd[4]; 315 unsigned char d_index[4]; 316 }; 317 318 /* Relative file descriptor */ 319 320 struct rfd_ext 321 { 322 unsigned char rfd[4]; 323 }; 324 325 /* Optimizer symbol external record */ 326 327 struct opt_ext 328 { 329 unsigned char o_bits1[1]; 330 unsigned char o_bits2[1]; 331 unsigned char o_bits3[1]; 332 unsigned char o_bits4[1]; 333 struct rndx_ext o_rndx; 334 unsigned char o_offset[4]; 335 }; 336 337 #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 338 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 339 340 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 341 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 342 343 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 344 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 345