1 /* IBM RS/6000 "XCOFF64" file definitions for BFD. 2 Copyright (C) 2000-2016 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software 16 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 17 MA 02110-1301, USA. */ 18 19 /********************** FILE HEADER **********************/ 20 21 struct external_filehdr 22 { 23 char f_magic[2]; /* magic number */ 24 char f_nscns[2]; /* number of sections */ 25 char f_timdat[4]; /* time & date stamp */ 26 char f_symptr[8]; /* file pointer to symtab */ 27 char f_opthdr[2]; /* sizeof(optional hdr) */ 28 char f_flags[2]; /* flags */ 29 char f_nsyms[4]; /* number of symtab entries */ 30 }; 31 32 /* IBM RS/6000. */ 33 #define U803XTOCMAGIC 0757 /* Aix 4.3 64-bit XCOFF */ 34 #define U64_TOCMAGIC 0767 /* AIX 5+ 64-bit XCOFF */ 35 #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC) 36 37 #define FILHDR struct external_filehdr 38 #define FILHSZ 24 39 40 /********************** AOUT "OPTIONAL HEADER" **********************/ 41 42 typedef struct 43 { 44 unsigned char magic[2]; /* type of file */ 45 unsigned char vstamp[2]; /* version stamp */ 46 unsigned char o_debugger[4]; /* reserved */ 47 unsigned char text_start[8]; /* base of text used for this file */ 48 unsigned char data_start[8]; /* base of data used for this file */ 49 unsigned char o_toc[8]; /* address of TOC */ 50 unsigned char o_snentry[2]; /* section number of entry point */ 51 unsigned char o_sntext[2]; /* section number of .text section */ 52 unsigned char o_sndata[2]; /* section number of .data section */ 53 unsigned char o_sntoc[2]; /* section number of TOC */ 54 unsigned char o_snloader[2]; /* section number of .loader section */ 55 unsigned char o_snbss[2]; /* section number of .bss section */ 56 unsigned char o_algntext[2]; /* .text alignment */ 57 unsigned char o_algndata[2]; /* .data alignment */ 58 unsigned char o_modtype[2]; /* module type (??) */ 59 unsigned char o_cputype[2]; /* cpu type */ 60 unsigned char o_resv2[4]; /* reserved */ 61 unsigned char tsize[8]; /* text size bytes, padded to FW bdry */ 62 unsigned char dsize[8]; /* initialized data " " */ 63 unsigned char bsize[8]; /* uninitialized data " " */ 64 unsigned char entry[8]; /* entry pt. */ 65 unsigned char o_maxstack[8]; /* max stack size (??) */ 66 unsigned char o_maxdata[8]; /* max data size (??) */ 67 unsigned char o_resv3[16]; /* reserved */ 68 } 69 AOUTHDR; 70 71 #define AOUTSZ 120 72 #define SMALL_AOUTSZ (0) 73 #define AOUTHDRSZ 72 74 75 /********************** SECTION HEADER **********************/ 76 77 struct external_scnhdr 78 { 79 char s_name[8]; /* section name */ 80 char s_paddr[8]; /* physical address, aliased s_nlib */ 81 char s_vaddr[8]; /* virtual address */ 82 char s_size[8]; /* section size */ 83 char s_scnptr[8]; /* file ptr to raw data for section */ 84 char s_relptr[8]; /* file ptr to relocation */ 85 char s_lnnoptr[8]; /* file ptr to line numbers */ 86 char s_nreloc[4]; /* number of relocation entries */ 87 char s_nlnno[4]; /* number of line number entries*/ 88 char s_flags[4]; /* flags */ 89 char s_pad[4]; /* padding */ 90 }; 91 92 #define SCNHDR struct external_scnhdr 93 94 #define SCNHSZ 72 95 96 /********************** LINE NUMBERS **********************/ 97 98 /* 1 line number entry for every "breakpointable" source line in a section. 99 Line numbers are grouped on a per function basis; first entry in a function 100 grouping will have l_lnno = 0 and in place of physical address will be the 101 symbol table index of the function name. */ 102 103 struct external_lineno 104 { 105 union 106 { 107 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 108 char l_paddr[8]; /* (physical) address of line number */ 109 } l_addr; 110 111 char l_lnno[4]; /* line number */ 112 }; 113 114 #define LINENO struct external_lineno 115 116 #define LINESZ 12 117 118 /********************** SYMBOLS **********************/ 119 120 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 121 #define E_FILNMLEN 14 /* # characters in a file name */ 122 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 123 124 struct external_syment 125 { 126 char e_value[8]; 127 char e_offset[4]; 128 char e_scnum[2]; 129 char e_type[2]; 130 char e_sclass[1]; 131 char e_numaux[1]; 132 }; 133 134 #define N_BTMASK (017) 135 #define N_TMASK (060) 136 #define N_BTSHFT (4) 137 #define N_TSHIFT (2) 138 139 union external_auxent 140 { 141 struct { 142 union { 143 struct { 144 char x_lnno[4]; /* declaration line number */ 145 char x_size[2]; /* str/union/array size */ 146 } x_lnsz; 147 struct { 148 char x_lnnoptr[8];/* ptr to fcn line */ 149 char x_fsize[4]; /* size of function */ 150 char x_endndx[4]; /* entry ndx past block end */ 151 } x_fcn; 152 } x_fcnary; 153 } x_sym; 154 155 struct { 156 union { 157 char x_fname[E_FILNMLEN]; 158 struct { 159 char x_zeroes[4]; 160 char x_offset[4]; 161 char x_pad[6]; 162 } x_n; 163 } x_n; 164 unsigned char x_ftype[1]; 165 unsigned char x_resv[2]; 166 } x_file; 167 168 struct { 169 char x_exptr[8]; 170 char x_fsize[4]; 171 char x_endndx[4]; 172 char x_pad[1]; 173 } x_except; 174 175 struct { 176 unsigned char x_scnlen_lo[4]; 177 unsigned char x_parmhash[4]; 178 unsigned char x_snhash[2]; 179 unsigned char x_smtyp[1]; 180 unsigned char x_smclas[1]; 181 unsigned char x_scnlen_hi[4]; 182 unsigned char x_pad[1]; 183 } x_csect; 184 185 struct { 186 char x_pad[17]; 187 char x_auxtype[1]; 188 } x_auxtype; 189 }; 190 191 #define SYMENT struct external_syment 192 #define SYMESZ 18 193 #define AUXENT union external_auxent 194 #define AUXESZ 18 195 #define DBXMASK 0x80 /* for dbx storage mask */ 196 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) 197 198 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h. */ 199 #define _AUX_EXCEPT 255 200 #define _AUX_FCN 254 201 #define _AUX_SYM 253 202 #define _AUX_FILE 252 203 #define _AUX_CSECT 251 204 205 /********************** RELOCATION DIRECTIVES **********************/ 206 207 struct external_reloc 208 { 209 char r_vaddr[8]; 210 char r_symndx[4]; 211 char r_size[1]; 212 char r_type[1]; 213 }; 214 215 #define RELOC struct external_reloc 216 #define RELSZ 14 217 218 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 219 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 220 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 221 /* For new sections we havn't heard of before */ 222 #define DEFAULT_SECTION_ALIGNMENT 4 223 224 /* The ldhdr structure. This appears at the start of the .loader 225 section. */ 226 227 struct external_ldhdr 228 { 229 bfd_byte l_version[4]; 230 bfd_byte l_nsyms[4]; 231 bfd_byte l_nreloc[4]; 232 bfd_byte l_istlen[4]; 233 bfd_byte l_nimpid[4]; 234 bfd_byte l_stlen[4]; 235 bfd_byte l_impoff[8]; 236 bfd_byte l_stoff[8]; 237 bfd_byte l_symoff[8]; 238 bfd_byte l_rldoff[8]; 239 }; 240 #define LDHDRSZ (56) 241 242 struct external_ldsym 243 { 244 bfd_byte l_value[8]; 245 bfd_byte l_offset[4]; 246 bfd_byte l_scnum[2]; 247 bfd_byte l_smtype[1]; 248 bfd_byte l_smclas[1]; 249 bfd_byte l_ifile[4]; 250 bfd_byte l_parm[4]; 251 }; 252 253 #define LDSYMSZ (24) 254 255 struct external_ldrel 256 { 257 bfd_byte l_vaddr[8]; 258 bfd_byte l_rtype[2]; 259 bfd_byte l_rsecnm[2]; 260 bfd_byte l_symndx[4]; 261 }; 262 263 #define LDRELSZ (16) 264 265 struct external_exceptab 266 { 267 union { 268 bfd_byte e_symndx[4]; 269 bfd_byte e_paddr[8]; 270 } e_addr; 271 bfd_byte e_lang[1]; 272 bfd_byte e_reason[1]; 273 }; 274 275 #define EXCEPTSZ (10) 276