1 /* IBM RS/6000 "XCOFF" file definitions for BFD. 2 Copyright (C) 1990, 1991, 2001 Free Software Foundation, Inc. 3 Written by Mimi Phuong-Thao Vo of IBM 4 and John Gilmore of Cygnus Support. */ 5 6 /********************** FILE HEADER **********************/ 7 8 struct external_filehdr { 9 char f_magic[2]; /* magic number */ 10 char f_nscns[2]; /* number of sections */ 11 char f_timdat[4]; /* time & date stamp */ 12 char f_symptr[4]; /* file pointer to symtab */ 13 char f_nsyms[4]; /* number of symtab entries */ 14 char f_opthdr[2]; /* sizeof(optional hdr) */ 15 char f_flags[2]; /* flags */ 16 }; 17 18 /* IBM RS/6000 */ 19 #define U802WRMAGIC 0730 /* writeable text segments **chh** */ 20 #define U802ROMAGIC 0735 /* readonly sharable text segments */ 21 #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ 22 23 #define BADMAG(x) \ 24 ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ 25 (x).f_magic != U802TOCMAGIC) 26 27 #define FILHDR struct external_filehdr 28 #define FILHSZ 20 29 30 31 /********************** AOUT "OPTIONAL HEADER" **********************/ 32 33 34 typedef struct 35 { 36 unsigned char magic[2]; /* type of file */ 37 unsigned char vstamp[2]; /* version stamp */ 38 unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ 39 unsigned char dsize[4]; /* initialized data " " */ 40 unsigned char bsize[4]; /* uninitialized data " " */ 41 unsigned char entry[4]; /* entry pt. */ 42 unsigned char text_start[4]; /* base of text used for this file */ 43 unsigned char data_start[4]; /* base of data used for this file */ 44 unsigned char o_toc[4]; /* address of TOC */ 45 unsigned char o_snentry[2]; /* section number of entry point */ 46 unsigned char o_sntext[2]; /* section number of .text section */ 47 unsigned char o_sndata[2]; /* section number of .data section */ 48 unsigned char o_sntoc[2]; /* section number of TOC */ 49 unsigned char o_snloader[2]; /* section number of .loader section */ 50 unsigned char o_snbss[2]; /* section number of .bss section */ 51 unsigned char o_algntext[2]; /* .text alignment */ 52 unsigned char o_algndata[2]; /* .data alignment */ 53 unsigned char o_modtype[2]; /* module type (??) */ 54 unsigned char o_cputype[2]; /* cpu type */ 55 unsigned char o_maxstack[4]; /* max stack size (??) */ 56 unsigned char o_maxdata[4]; /* max data size (??) */ 57 unsigned char o_resv2[12]; /* reserved */ 58 } 59 AOUTHDR; 60 61 #define AOUTSZ 72 62 #define SMALL_AOUTSZ (28) 63 #define AOUTHDRSZ 72 64 65 /********************** SECTION HEADER **********************/ 66 67 68 struct external_scnhdr { 69 char s_name[8]; /* section name */ 70 char s_paddr[4]; /* physical address, aliased s_nlib */ 71 char s_vaddr[4]; /* virtual address */ 72 char s_size[4]; /* section size */ 73 char s_scnptr[4]; /* file ptr to raw data for section */ 74 char s_relptr[4]; /* file ptr to relocation */ 75 char s_lnnoptr[4]; /* file ptr to line numbers */ 76 char s_nreloc[2]; /* number of relocation entries */ 77 char s_nlnno[2]; /* number of line number entries*/ 78 char s_flags[4]; /* flags */ 79 }; 80 81 #define SCNHDR struct external_scnhdr 82 #define SCNHSZ 40 83 84 /********************** LINE NUMBERS **********************/ 85 86 /* 1 line number entry for every "breakpointable" source line in a section. 87 * Line numbers are grouped on a per function basis; first entry in a function 88 * grouping will have l_lnno = 0 and in place of physical address will be the 89 * symbol table index of the function name. 90 */ 91 struct external_lineno { 92 union { 93 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 94 char l_paddr[4]; /* (physical) address of line number */ 95 } l_addr; 96 char l_lnno[2]; /* line number */ 97 }; 98 99 100 #define LINENO struct external_lineno 101 #define LINESZ 6 102 103 104 /********************** SYMBOLS **********************/ 105 106 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 107 #define E_FILNMLEN 14 /* # characters in a file name */ 108 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 109 110 struct external_syment 111 { 112 union { 113 char e_name[E_SYMNMLEN]; 114 struct { 115 char e_zeroes[4]; 116 char e_offset[4]; 117 } e; 118 } e; 119 char e_value[4]; 120 char e_scnum[2]; 121 char e_type[2]; 122 char e_sclass[1]; 123 char e_numaux[1]; 124 }; 125 126 127 128 #define N_BTMASK (017) 129 #define N_TMASK (060) 130 #define N_BTSHFT (4) 131 #define N_TSHIFT (2) 132 133 134 union external_auxent { 135 struct { 136 char x_tagndx[4]; /* str, un, or enum tag indx */ 137 union { 138 struct { 139 char x_lnno[2]; /* declaration line number */ 140 char x_size[2]; /* str/union/array size */ 141 } x_lnsz; 142 char x_fsize[4]; /* size of function */ 143 } x_misc; 144 union { 145 struct { /* if ISFCN, tag, or .bb */ 146 char x_lnnoptr[4]; /* ptr to fcn line # */ 147 char x_endndx[4]; /* entry ndx past block end */ 148 } x_fcn; 149 struct { /* if ISARY, up to 4 dimen. */ 150 char x_dimen[E_DIMNUM][2]; 151 } x_ary; 152 } x_fcnary; 153 char x_tvndx[2]; /* tv index */ 154 } x_sym; 155 156 union { 157 char x_fname[E_FILNMLEN]; 158 struct { 159 char x_zeroes[4]; 160 char x_offset[4]; 161 } x_n; 162 } x_file; 163 164 struct { 165 char x_scnlen[4]; /* section length */ 166 char x_nreloc[2]; /* # relocation entries */ 167 char x_nlinno[2]; /* # line numbers */ 168 } x_scn; 169 170 struct { 171 char x_tvfill[4]; /* tv fill value */ 172 char x_tvlen[2]; /* length of .tv */ 173 char x_tvran[2][2]; /* tv range */ 174 } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ 175 176 struct { 177 unsigned char x_scnlen[4]; 178 unsigned char x_parmhash[4]; 179 unsigned char x_snhash[2]; 180 unsigned char x_smtyp[1]; 181 unsigned char x_smclas[1]; 182 unsigned char x_stab[4]; 183 unsigned char x_snstab[2]; 184 } x_csect; 185 186 }; 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) 194 195 196 197 /********************** RELOCATION DIRECTIVES **********************/ 198 199 200 struct external_reloc { 201 char r_vaddr[4]; 202 char r_symndx[4]; 203 char r_size[1]; 204 char r_type[1]; 205 }; 206 207 208 #define RELOC struct external_reloc 209 #define RELSZ 10 210 211 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 212 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 213 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 214 /* For new sections we havn't heard of before */ 215 #define DEFAULT_SECTION_ALIGNMENT 4 216 217 /* The ldhdr structure. This appears at the start of the .loader 218 section. */ 219 220 struct external_ldhdr 221 { 222 bfd_byte l_version[4]; 223 bfd_byte l_nsyms[4]; 224 bfd_byte l_nreloc[4]; 225 bfd_byte l_istlen[4]; 226 bfd_byte l_nimpid[4]; 227 bfd_byte l_impoff[4]; 228 bfd_byte l_stlen[4]; 229 bfd_byte l_stoff[4]; 230 }; 231 232 #define LDHDRSZ (8 * 4) 233 234 struct external_ldsym 235 { 236 union 237 { 238 bfd_byte _l_name[SYMNMLEN]; 239 struct 240 { 241 bfd_byte _l_zeroes[4]; 242 bfd_byte _l_offset[4]; 243 } _l_l; 244 } _l; 245 bfd_byte l_value[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 (8 + 3 * 4 + 2 + 2) 254 255 struct external_ldrel 256 { 257 bfd_byte l_vaddr[4]; 258 bfd_byte l_symndx[4]; 259 bfd_byte l_rtype[2]; 260 bfd_byte l_rsecnm[2]; 261 }; 262 263 #define LDRELSZ (2 * 4 + 2 * 2) 264