1 /* IBM RS/6000 "XCOFF64" file definitions for BFD. 2 Copyright (C) 2000, 2002 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17 18 /********************** FILE HEADER **********************/ 19 20 struct external_filehdr 21 { 22 char f_magic[2]; /* magic number */ 23 char f_nscns[2]; /* number of sections */ 24 char f_timdat[4]; /* time & date stamp */ 25 char f_symptr[8]; /* file pointer to symtab */ 26 char f_opthdr[2]; /* sizeof(optional hdr) */ 27 char f_flags[2]; /* flags */ 28 char f_nsyms[4]; /* number of symtab entries */ 29 }; 30 31 /* IBM RS/6000. */ 32 #define U803XTOCMAGIC 0757 /* Aix 4.3 64-bit XCOFF */ 33 #define U64_TOCMAGIC 0767 /* AIX 5+ 64-bit XCOFF */ 34 #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC) 35 36 #define FILHDR struct external_filehdr 37 #define FILHSZ 24 38 39 /********************** AOUT "OPTIONAL HEADER" **********************/ 40 41 typedef struct 42 { 43 unsigned char magic[2]; /* type of file */ 44 unsigned char vstamp[2]; /* version stamp */ 45 unsigned char o_debugger[4]; /* reserved */ 46 unsigned char text_start[8]; /* base of text used for this file */ 47 unsigned char data_start[8]; /* base of data used for this file */ 48 unsigned char o_toc[8]; /* address of TOC */ 49 unsigned char o_snentry[2]; /* section number of entry point */ 50 unsigned char o_sntext[2]; /* section number of .text section */ 51 unsigned char o_sndata[2]; /* section number of .data section */ 52 unsigned char o_sntoc[2]; /* section number of TOC */ 53 unsigned char o_snloader[2]; /* section number of .loader section */ 54 unsigned char o_snbss[2]; /* section number of .bss section */ 55 unsigned char o_algntext[2]; /* .text alignment */ 56 unsigned char o_algndata[2]; /* .data alignment */ 57 unsigned char o_modtype[2]; /* module type (??) */ 58 unsigned char o_cputype[2]; /* cpu type */ 59 unsigned char o_resv2[4]; /* reserved */ 60 unsigned char tsize[8]; /* text size bytes, padded to FW bdry */ 61 unsigned char dsize[8]; /* initialized data " " */ 62 unsigned char bsize[8]; /* uninitialized data " " */ 63 unsigned char entry[8]; /* entry pt. */ 64 unsigned char o_maxstack[8]; /* max stack size (??) */ 65 unsigned char o_maxdata[8]; /* max data size (??) */ 66 unsigned char o_resv3[16]; /* reserved */ 67 } 68 AOUTHDR; 69 70 #define AOUTSZ 120 71 #define SMALL_AOUTSZ (0) 72 #define AOUTHDRSZ 72 73 74 /********************** SECTION HEADER **********************/ 75 76 struct external_scnhdr 77 { 78 char s_name[8]; /* section name */ 79 char s_paddr[8]; /* physical address, aliased s_nlib */ 80 char s_vaddr[8]; /* virtual address */ 81 char s_size[8]; /* section size */ 82 char s_scnptr[8]; /* file ptr to raw data for section */ 83 char s_relptr[8]; /* file ptr to relocation */ 84 char s_lnnoptr[8]; /* file ptr to line numbers */ 85 char s_nreloc[4]; /* number of relocation entries */ 86 char s_nlnno[4]; /* number of line number entries*/ 87 char s_flags[4]; /* flags */ 88 char s_pad[4]; /* padding */ 89 }; 90 91 #define SCNHDR struct external_scnhdr 92 93 #define SCNHSZ 72 94 95 /********************** LINE NUMBERS **********************/ 96 97 /* 1 line number entry for every "breakpointable" source line in a section. 98 Line numbers are grouped on a per function basis; first entry in a function 99 grouping will have l_lnno = 0 and in place of physical address will be the 100 symbol table index of the function name. */ 101 102 struct external_lineno 103 { 104 union 105 { 106 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 107 char l_paddr[8]; /* (physical) address of line number */ 108 } l_addr; 109 110 char l_lnno[4]; /* line number */ 111 }; 112 113 #define LINENO struct external_lineno 114 115 #define LINESZ 12 116 117 /********************** SYMBOLS **********************/ 118 119 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 120 #define E_FILNMLEN 14 /* # characters in a file name */ 121 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 122 123 struct external_syment 124 { 125 char e_value[8]; 126 char e_offset[4]; 127 char e_scnum[2]; 128 char e_type[2]; 129 char e_sclass[1]; 130 char e_numaux[1]; 131 }; 132 133 #define N_BTMASK (017) 134 #define N_TMASK (060) 135 #define N_BTSHFT (4) 136 #define N_TSHIFT (2) 137 138 union external_auxent 139 { 140 struct { 141 union { 142 struct { 143 char x_lnno[4]; /* declaration line number */ 144 char x_size[2]; /* str/union/array size */ 145 } x_lnsz; 146 struct { 147 char x_lnnoptr[8];/* ptr to fcn line */ 148 char x_fsize[4]; /* size of function */ 149 char x_endndx[4]; /* entry ndx past block end */ 150 } x_fcn; 151 } x_fcnary; 152 } x_sym; 153 154 union { 155 char x_fname[E_FILNMLEN]; 156 struct { 157 char x_zeroes[4]; 158 char x_offset[4]; 159 char x_pad[6]; 160 unsigned char x_ftype[1]; 161 unsigned char x_resv[2]; 162 } x_n; 163 } x_file; 164 165 struct { 166 char x_exptr[8]; 167 char x_fsize[4]; 168 char x_endndx[4]; 169 char x_pad[1]; 170 } x_except; 171 172 struct { 173 unsigned char x_scnlen_lo[4]; 174 unsigned char x_parmhash[4]; 175 unsigned char x_snhash[2]; 176 unsigned char x_smtyp[1]; 177 unsigned char x_smclas[1]; 178 unsigned char x_scnlen_hi[4]; 179 unsigned char x_pad[1]; 180 } x_csect; 181 182 struct { 183 char x_pad[17]; 184 char x_auxtype[1]; 185 } x_auxtype; 186 }; 187 188 #define SYMENT struct external_syment 189 #define SYMESZ 18 190 #define AUXENT union external_auxent 191 #define AUXESZ 18 192 #define DBXMASK 0x80 /* for dbx storage mask */ 193 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) 194 195 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h. */ 196 #define _AUX_EXCEPT 255 197 #define _AUX_FCN 254 198 #define _AUX_SYM 253 199 #define _AUX_FILE 252 200 #define _AUX_CSECT 251 201 202 /********************** RELOCATION DIRECTIVES **********************/ 203 204 struct external_reloc 205 { 206 char r_vaddr[8]; 207 char r_symndx[4]; 208 char r_size[1]; 209 char r_type[1]; 210 }; 211 212 #define RELOC struct external_reloc 213 #define RELSZ 14 214 215 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 216 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 217 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 218 /* For new sections we havn't heard of before */ 219 #define DEFAULT_SECTION_ALIGNMENT 4 220 221 /* The ldhdr structure. This appears at the start of the .loader 222 section. */ 223 224 struct external_ldhdr 225 { 226 bfd_byte l_version[4]; 227 bfd_byte l_nsyms[4]; 228 bfd_byte l_nreloc[4]; 229 bfd_byte l_istlen[4]; 230 bfd_byte l_nimpid[4]; 231 bfd_byte l_stlen[4]; 232 bfd_byte l_impoff[8]; 233 bfd_byte l_stoff[8]; 234 bfd_byte l_symoff[8]; 235 bfd_byte l_rldoff[8]; 236 }; 237 #define LDHDRSZ (56) 238 239 struct external_ldsym 240 { 241 bfd_byte l_value[8]; 242 bfd_byte l_offset[4]; 243 bfd_byte l_scnum[2]; 244 bfd_byte l_smtype[1]; 245 bfd_byte l_smclas[1]; 246 bfd_byte l_ifile[4]; 247 bfd_byte l_parm[4]; 248 }; 249 250 #define LDSYMSZ (24) 251 252 struct external_ldrel 253 { 254 bfd_byte l_vaddr[8]; 255 bfd_byte l_rtype[2]; 256 bfd_byte l_rsecnm[2]; 257 bfd_byte l_symndx[4]; 258 }; 259 260 #define LDRELSZ (16) 261