1 /* IBM RS/6000 "XCOFF" file definitions for BFD. 2 Copyright (C) 1990-2020 Free Software Foundation, Inc. 3 Written by Mimi Phuong-Thao Vo of IBM 4 and John Gilmore of Cygnus Support. 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 /********************** FILE HEADER **********************/ 22 23 struct external_filehdr { 24 char f_magic[2]; /* magic number */ 25 char f_nscns[2]; /* number of sections */ 26 char f_timdat[4]; /* time & date stamp */ 27 char f_symptr[4]; /* file pointer to symtab */ 28 char f_nsyms[4]; /* number of symtab entries */ 29 char f_opthdr[2]; /* sizeof(optional hdr) */ 30 char f_flags[2]; /* flags */ 31 }; 32 33 /* IBM RS/6000 */ 34 #define U802WRMAGIC 0730 /* writeable text segments **chh** */ 35 #define U802ROMAGIC 0735 /* readonly sharable text segments */ 36 #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ 37 38 #define BADMAG(x) \ 39 ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ 40 (x).f_magic != U802TOCMAGIC) 41 42 #define FILHDR struct external_filehdr 43 #define FILHSZ 20 44 45 46 /********************** AOUT "OPTIONAL HEADER" **********************/ 47 48 49 typedef struct 50 { 51 unsigned char magic[2]; /* type of file */ 52 unsigned char vstamp[2]; /* version stamp */ 53 unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ 54 unsigned char dsize[4]; /* initialized data " " */ 55 unsigned char bsize[4]; /* uninitialized data " " */ 56 unsigned char entry[4]; /* entry pt. */ 57 unsigned char text_start[4]; /* base of text used for this file */ 58 unsigned char data_start[4]; /* base of data used for this file */ 59 unsigned char o_toc[4]; /* address of TOC */ 60 unsigned char o_snentry[2]; /* section number of entry point */ 61 unsigned char o_sntext[2]; /* section number of .text section */ 62 unsigned char o_sndata[2]; /* section number of .data section */ 63 unsigned char o_sntoc[2]; /* section number of TOC */ 64 unsigned char o_snloader[2]; /* section number of .loader section */ 65 unsigned char o_snbss[2]; /* section number of .bss section */ 66 unsigned char o_algntext[2]; /* .text alignment */ 67 unsigned char o_algndata[2]; /* .data alignment */ 68 unsigned char o_modtype[2]; /* module type (??) */ 69 unsigned char o_cputype[2]; /* cpu type */ 70 unsigned char o_maxstack[4]; /* max stack size (??) */ 71 unsigned char o_maxdata[4]; /* max data size (??) */ 72 unsigned char o_resv2[12]; /* reserved */ 73 } 74 AOUTHDR; 75 76 #define AOUTSZ 72 77 #define SMALL_AOUTSZ (28) 78 #define AOUTHDRSZ 72 79 80 /********************** SECTION HEADER **********************/ 81 82 83 struct external_scnhdr { 84 char s_name[8]; /* section name */ 85 char s_paddr[4]; /* physical address, aliased s_nlib */ 86 char s_vaddr[4]; /* virtual address */ 87 char s_size[4]; /* section size */ 88 char s_scnptr[4]; /* file ptr to raw data for section */ 89 char s_relptr[4]; /* file ptr to relocation */ 90 char s_lnnoptr[4]; /* file ptr to line numbers */ 91 char s_nreloc[2]; /* number of relocation entries */ 92 char s_nlnno[2]; /* number of line number entries*/ 93 char s_flags[4]; /* flags */ 94 }; 95 96 #define SCNHDR struct external_scnhdr 97 #define SCNHSZ 40 98 99 /********************** LINE NUMBERS **********************/ 100 101 /* 1 line number entry for every "breakpointable" source line in a section. 102 * Line numbers are grouped on a per function basis; first entry in a function 103 * grouping will have l_lnno = 0 and in place of physical address will be the 104 * symbol table index of the function name. 105 */ 106 struct external_lineno { 107 union { 108 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 109 char l_paddr[4]; /* (physical) address of line number */ 110 } l_addr; 111 char l_lnno[2]; /* line number */ 112 }; 113 114 115 #define LINENO struct external_lineno 116 #define LINESZ 6 117 118 119 /********************** SYMBOLS **********************/ 120 121 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 122 #define E_FILNMLEN 14 /* # characters in a file name */ 123 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 124 125 struct external_syment 126 { 127 union { 128 char e_name[E_SYMNMLEN]; 129 struct { 130 char e_zeroes[4]; 131 char e_offset[4]; 132 } e; 133 } e; 134 char e_value[4]; 135 char e_scnum[2]; 136 char e_type[2]; 137 char e_sclass[1]; 138 char e_numaux[1]; 139 }; 140 141 142 143 #define N_BTMASK (017) 144 #define N_TMASK (060) 145 #define N_BTSHFT (4) 146 #define N_TSHIFT (2) 147 148 149 union external_auxent { 150 struct { 151 char x_tagndx[4]; /* str, un, or enum tag indx */ 152 union { 153 struct { 154 char x_lnno[2]; /* declaration line number */ 155 char x_size[2]; /* str/union/array size */ 156 } x_lnsz; 157 char x_fsize[4]; /* size of function */ 158 } x_misc; 159 union { 160 struct { /* if ISFCN, tag, or .bb */ 161 char x_lnnoptr[4]; /* ptr to fcn line # */ 162 char x_endndx[4]; /* entry ndx past block end */ 163 } x_fcn; 164 struct { /* if ISARY, up to 4 dimen. */ 165 char x_dimen[E_DIMNUM][2]; 166 } x_ary; 167 } x_fcnary; 168 char x_tvndx[2]; /* tv index */ 169 } x_sym; 170 171 struct { 172 union { 173 char x_fname[E_FILNMLEN]; 174 struct { 175 char x_zeroes[4]; 176 char x_offset[4]; 177 } x_n; 178 } x_n; 179 char x_ftype[1]; 180 } x_file; 181 182 struct { 183 char x_scnlen[4]; /* section length */ 184 char x_nreloc[2]; /* # relocation entries */ 185 char x_nlinno[2]; /* # line numbers */ 186 } x_scn; 187 188 struct { 189 char x_tvfill[4]; /* tv fill value */ 190 char x_tvlen[2]; /* length of .tv */ 191 char x_tvran[2][2]; /* tv range */ 192 } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ 193 194 struct { 195 unsigned char x_scnlen[4]; 196 unsigned char x_parmhash[4]; 197 unsigned char x_snhash[2]; 198 unsigned char x_smtyp[1]; 199 unsigned char x_smclas[1]; 200 unsigned char x_stab[4]; 201 unsigned char x_snstab[2]; 202 } x_csect; 203 204 }; 205 206 #define SYMENT struct external_syment 207 #define SYMESZ 18 208 #define AUXENT union external_auxent 209 #define AUXESZ 18 210 #define DBXMASK 0x80 /* for dbx storage mask */ 211 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) 212 213 214 215 /********************** RELOCATION DIRECTIVES **********************/ 216 217 218 struct external_reloc { 219 char r_vaddr[4]; 220 char r_symndx[4]; 221 char r_size[1]; 222 char r_type[1]; 223 }; 224 225 226 #define RELOC struct external_reloc 227 #define RELSZ 10 228 229 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 230 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 231 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 232 /* For new sections we havn't heard of before */ 233 #define DEFAULT_SECTION_ALIGNMENT 4 234 235 /* The ldhdr structure. This appears at the start of the .loader 236 section. */ 237 238 struct external_ldhdr 239 { 240 bfd_byte l_version[4]; 241 bfd_byte l_nsyms[4]; 242 bfd_byte l_nreloc[4]; 243 bfd_byte l_istlen[4]; 244 bfd_byte l_nimpid[4]; 245 bfd_byte l_impoff[4]; 246 bfd_byte l_stlen[4]; 247 bfd_byte l_stoff[4]; 248 }; 249 250 #define LDHDRSZ (8 * 4) 251 252 struct external_ldsym 253 { 254 union 255 { 256 bfd_byte _l_name[E_SYMNMLEN]; 257 struct 258 { 259 bfd_byte _l_zeroes[4]; 260 bfd_byte _l_offset[4]; 261 } _l_l; 262 } _l; 263 bfd_byte l_value[4]; 264 bfd_byte l_scnum[2]; 265 bfd_byte l_smtype[1]; 266 bfd_byte l_smclas[1]; 267 bfd_byte l_ifile[4]; 268 bfd_byte l_parm[4]; 269 }; 270 271 #define LDSYMSZ (8 + 3 * 4 + 2 + 2) 272 273 struct external_ldrel 274 { 275 bfd_byte l_vaddr[4]; 276 bfd_byte l_symndx[4]; 277 bfd_byte l_rtype[2]; 278 bfd_byte l_rsecnm[2]; 279 }; 280 281 #define LDRELSZ (2 * 4 + 2 * 2) 282 283 struct external_exceptab 284 { 285 union { 286 bfd_byte e_symndx[4]; 287 bfd_byte e_paddr[4]; 288 } e_addr; 289 bfd_byte e_lang[1]; 290 bfd_byte e_reason[1]; 291 }; 292 293 #define EXCEPTSZ (4 + 2) 294 295 /******************** Core files *************************/ 296 297 struct external_core_dumpx 298 { 299 unsigned char c_signo[1]; 300 unsigned char c_flag[1]; 301 unsigned char c_entries[2]; 302 303 unsigned char c_version[4]; 304 305 unsigned char c_fdsinfox[8]; 306 unsigned char c_loader[8]; 307 unsigned char c_lsize[8]; 308 309 unsigned char c_n_thr[4]; 310 unsigned char c_reserved0[4]; 311 unsigned char c_thr[8]; 312 313 unsigned char c_segs[8]; 314 unsigned char c_segregion[8]; 315 316 unsigned char c_stack[8]; 317 unsigned char c_stackorg[8]; 318 unsigned char c_size[8]; 319 320 unsigned char c_data[8]; 321 unsigned char c_dataorg[8]; 322 unsigned char c_datasize[8]; 323 unsigned char c_sdorg[8]; 324 unsigned char c_sdsize[8]; 325 326 unsigned char c_vmmregions[8]; 327 unsigned char c_vmm[8]; 328 329 unsigned char c_impl[4]; 330 unsigned char c_pad[4]; 331 unsigned char c_cprs[8]; 332 unsigned char c_reserved[7 * 8]; 333 334 /* Followed by: 335 - context of the faulting thread. 336 - user structure. */ 337 }; 338 339 340 /* Core file verion. */ 341 #define CORE_DUMPX_VERSION 0x0feeddb1 342 #define CORE_DUMPXX_VERSION 0x0feeddb2 343 344 struct external_ld_info32 345 { 346 unsigned char ldinfo_next[4]; 347 unsigned char core_offset[4]; 348 unsigned char ldinfo_textorg[4]; 349 unsigned char ldinfo_textsize[4]; 350 unsigned char ldinfo_dataorg[4]; 351 unsigned char ldinfo_datasize[4]; 352 unsigned char ldinfo_filename[2]; 353 }; 354