rs6000.h revision 1.9
1 /* IBM RS/6000 "XCOFF" file definitions for BFD. 2 Copyright (C) 1990-2024 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_debugger[4]; /* reserved */ 73 unsigned char o_textpsize[1]; /* text page size */ 74 unsigned char o_datapsize[1]; /* data page size */ 75 unsigned char o_stackpsize[1]; /* stack page size */ 76 unsigned char o_flags[1]; /* Flags and TLS alignment */ 77 unsigned char o_sntdata[2]; /* section number of .tdata section */ 78 unsigned char o_sntbss[2]; /* section number of .tbss section */ 79 } 80 AOUTHDR; 81 82 #define AOUTSZ 72 83 #define SMALL_AOUTSZ (28) 84 #define AOUTHDRSZ 72 85 86 /********************** SECTION HEADER **********************/ 87 88 89 struct external_scnhdr { 90 char s_name[8]; /* section name */ 91 char s_paddr[4]; /* physical address, aliased s_nlib */ 92 char s_vaddr[4]; /* virtual address */ 93 char s_size[4]; /* section size */ 94 char s_scnptr[4]; /* file ptr to raw data for section */ 95 char s_relptr[4]; /* file ptr to relocation */ 96 char s_lnnoptr[4]; /* file ptr to line numbers */ 97 char s_nreloc[2]; /* number of relocation entries */ 98 char s_nlnno[2]; /* number of line number entries*/ 99 char s_flags[4]; /* flags */ 100 }; 101 102 #define SCNHDR struct external_scnhdr 103 #define SCNHSZ 40 104 105 /********************** LINE NUMBERS **********************/ 106 107 /* 1 line number entry for every "breakpointable" source line in a section. 108 * Line numbers are grouped on a per function basis; first entry in a function 109 * grouping will have l_lnno = 0 and in place of physical address will be the 110 * symbol table index of the function name. 111 */ 112 struct external_lineno { 113 union { 114 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 115 char l_paddr[4]; /* (physical) address of line number */ 116 } l_addr; 117 char l_lnno[2]; /* line number */ 118 }; 119 120 121 #define LINENO struct external_lineno 122 #define LINESZ 6 123 124 125 /********************** SYMBOLS **********************/ 126 127 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 128 #define E_FILNMLEN 14 /* # characters in a file name */ 129 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 130 131 struct external_syment 132 { 133 union { 134 char e_name[E_SYMNMLEN]; 135 struct { 136 char e_zeroes[4]; 137 char e_offset[4]; 138 } e; 139 } e; 140 char e_value[4]; 141 char e_scnum[2]; 142 char e_type[2]; 143 char e_sclass[1]; 144 char e_numaux[1]; 145 }; 146 147 148 149 #define N_BTMASK (017) 150 #define N_TMASK (060) 151 #define N_BTSHFT (4) 152 #define N_TSHIFT (2) 153 154 155 union external_auxent { 156 struct { 157 char x_pad1[2]; 158 char x_lnno[4]; /* Source line number */ 159 char x_pad[12]; 160 } x_sym; 161 162 struct { 163 char x_exptr[4]; 164 char x_fsize[4]; 165 char x_lnnoptr[4]; 166 char x_endndx[4]; 167 char x_pad[1]; 168 } x_fcn; 169 170 struct { 171 union { 172 char x_fname[E_FILNMLEN]; 173 struct { 174 char x_zeroes[4]; 175 char x_offset[4]; 176 } x_n; 177 } x_n; 178 char x_ftype[1]; 179 char x_resv[3]; 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 char x_pad[10]; 187 } x_scn; 188 189 struct { 190 char x_scnlen[4]; 191 char x_parmhash[4]; 192 char x_snhash[2]; 193 char x_smtyp[1]; 194 char x_smclas[1]; 195 char x_stab[4]; 196 char x_snstab[2]; 197 } x_csect; 198 199 struct { 200 char x_scnlen[4]; 201 char x_pad1[4]; 202 char x_nreloc[4]; 203 char x_pad2[6]; 204 } x_sect; 205 206 }; 207 208 #define SYMENT struct external_syment 209 #define SYMESZ 18 210 #define AUXENT union external_auxent 211 #define AUXESZ 18 212 #define DBXMASK 0x80 /* for dbx storage mask */ 213 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) 214 215 216 217 /********************** RELOCATION DIRECTIVES **********************/ 218 219 220 struct external_reloc { 221 char r_vaddr[4]; 222 char r_symndx[4]; 223 char r_size[1]; 224 char r_type[1]; 225 }; 226 227 228 #define RELOC struct external_reloc 229 #define RELSZ 10 230 231 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 232 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 233 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 234 /* For new sections we havn't heard of before */ 235 #define DEFAULT_SECTION_ALIGNMENT 4 236 237 /* The ldhdr structure. This appears at the start of the .loader 238 section. */ 239 240 struct external_ldhdr 241 { 242 bfd_byte l_version[4]; 243 bfd_byte l_nsyms[4]; 244 bfd_byte l_nreloc[4]; 245 bfd_byte l_istlen[4]; 246 bfd_byte l_nimpid[4]; 247 bfd_byte l_impoff[4]; 248 bfd_byte l_stlen[4]; 249 bfd_byte l_stoff[4]; 250 }; 251 252 #define LDHDRSZ (8 * 4) 253 254 struct external_ldsym 255 { 256 union 257 { 258 bfd_byte _l_name[E_SYMNMLEN]; 259 struct 260 { 261 bfd_byte _l_zeroes[4]; 262 bfd_byte _l_offset[4]; 263 } _l_l; 264 } _l; 265 bfd_byte l_value[4]; 266 bfd_byte l_scnum[2]; 267 bfd_byte l_smtype[1]; 268 bfd_byte l_smclas[1]; 269 bfd_byte l_ifile[4]; 270 bfd_byte l_parm[4]; 271 }; 272 273 #define LDSYMSZ (8 + 3 * 4 + 2 + 2) 274 275 struct external_ldrel 276 { 277 bfd_byte l_vaddr[4]; 278 bfd_byte l_symndx[4]; 279 bfd_byte l_rtype[2]; 280 bfd_byte l_rsecnm[2]; 281 }; 282 283 #define LDRELSZ (2 * 4 + 2 * 2) 284 285 struct external_exceptab 286 { 287 union { 288 bfd_byte e_symndx[4]; 289 bfd_byte e_paddr[4]; 290 } e_addr; 291 bfd_byte e_lang[1]; 292 bfd_byte e_reason[1]; 293 }; 294 295 #define EXCEPTSZ (4 + 2) 296 297 /******************** Core files *************************/ 298 299 struct external_core_dumpx 300 { 301 unsigned char c_signo[1]; 302 unsigned char c_flag[1]; 303 unsigned char c_entries[2]; 304 305 unsigned char c_version[4]; 306 307 unsigned char c_fdsinfox[8]; 308 unsigned char c_loader[8]; 309 unsigned char c_lsize[8]; 310 311 unsigned char c_n_thr[4]; 312 unsigned char c_reserved0[4]; 313 unsigned char c_thr[8]; 314 315 unsigned char c_segs[8]; 316 unsigned char c_segregion[8]; 317 318 unsigned char c_stack[8]; 319 unsigned char c_stackorg[8]; 320 unsigned char c_size[8]; 321 322 unsigned char c_data[8]; 323 unsigned char c_dataorg[8]; 324 unsigned char c_datasize[8]; 325 unsigned char c_sdorg[8]; 326 unsigned char c_sdsize[8]; 327 328 unsigned char c_vmmregions[8]; 329 unsigned char c_vmm[8]; 330 331 unsigned char c_impl[4]; 332 unsigned char c_pad[4]; 333 unsigned char c_cprs[8]; 334 unsigned char c_reserved[7 * 8]; 335 336 /* Followed by: 337 - context of the faulting thread. 338 - user structure. */ 339 }; 340 341 342 /* Core file verion. */ 343 #define CORE_DUMPX_VERSION 0x0feeddb1 344 #define CORE_DUMPXX_VERSION 0x0feeddb2 345 346 struct external_ld_info32 347 { 348 unsigned char ldinfo_next[4]; 349 unsigned char core_offset[4]; 350 unsigned char ldinfo_textorg[4]; 351 unsigned char ldinfo_textsize[4]; 352 unsigned char ldinfo_dataorg[4]; 353 unsigned char ldinfo_datasize[4]; 354 unsigned char ldinfo_filename[2]; 355 }; 356
Indexes created Mon Apr 27 00:23:16 UTC 2026