1 /* IBM RS/6000 "XCOFF" file definitions for BFD. 2 Copyright (C) 1990, 1991 Free Software Foundation, Inc. 3 FIXME: Can someone provide a transliteration of this name into ASCII? 4 Using the following chars caused a compiler warning on HIUX (so I replaced 5 them with octal escapes), and isn't useful without an understanding of what 6 character set it is. 7 Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM 8 and John Gilmore of Cygnus Support. */ 9 10 /********************** FILE HEADER **********************/ 11 12 struct external_filehdr { 13 char f_magic[2]; /* magic number */ 14 char f_nscns[2]; /* number of sections */ 15 char f_timdat[4]; /* time & date stamp */ 16 char f_symptr[4]; /* file pointer to symtab */ 17 char f_nsyms[4]; /* number of symtab entries */ 18 char f_opthdr[2]; /* sizeof(optional hdr) */ 19 char f_flags[2]; /* flags */ 20 }; 21 22 /* IBM RS/6000 */ 23 #define U802WRMAGIC 0730 /* writeable text segments **chh** */ 24 #define U802ROMAGIC 0735 /* readonly sharable text segments */ 25 #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ 26 27 #define BADMAG(x) \ 28 ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ 29 (x).f_magic != U802TOCMAGIC) 30 31 #define FILHDR struct external_filehdr 32 #define FILHSZ 20 33 34 35 /********************** AOUT "OPTIONAL HEADER" **********************/ 36 37 38 typedef struct 39 { 40 unsigned char magic[2]; /* type of file */ 41 unsigned char vstamp[2]; /* version stamp */ 42 unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ 43 unsigned char dsize[4]; /* initialized data " " */ 44 unsigned char bsize[4]; /* uninitialized data " " */ 45 unsigned char entry[4]; /* entry pt. */ 46 unsigned char text_start[4]; /* base of text used for this file */ 47 unsigned char data_start[4]; /* base of data used for this file */ 48 unsigned char o_toc[4]; /* 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_maxstack[4]; /* max stack size (??) */ 60 unsigned char o_maxdata[4]; /* max data size (??) */ 61 unsigned char o_resv2[12]; /* reserved */ 62 } 63 AOUTHDR; 64 65 #define AOUTSZ 72 66 #define SMALL_AOUTSZ (28) 67 #define AOUTHDRSZ 72 68 69 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ 70 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ 71 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ 72 73 74 /********************** SECTION HEADER **********************/ 75 76 77 struct external_scnhdr { 78 char s_name[8]; /* section name */ 79 char s_paddr[4]; /* physical address, aliased s_nlib */ 80 char s_vaddr[4]; /* virtual address */ 81 char s_size[4]; /* section size */ 82 char s_scnptr[4]; /* file ptr to raw data for section */ 83 char s_relptr[4]; /* file ptr to relocation */ 84 char s_lnnoptr[4]; /* file ptr to line numbers */ 85 char s_nreloc[2]; /* number of relocation entries */ 86 char s_nlnno[2]; /* number of line number entries*/ 87 char s_flags[4]; /* flags */ 88 }; 89 90 /* 91 * names of "special" sections 92 */ 93 #define _TEXT ".text" 94 #define _DATA ".data" 95 #define _BSS ".bss" 96 #define _PAD ".pad" 97 #define _LOADER ".loader" 98 99 #define SCNHDR struct external_scnhdr 100 #define SCNHSZ 40 101 102 /* XCOFF uses a special .loader section with type STYP_LOADER. */ 103 #define STYP_LOADER 0x1000 104 105 /* XCOFF uses a special .debug section with type STYP_DEBUG. */ 106 #define STYP_DEBUG 0x2000 107 108 /* XCOFF handles line number or relocation overflow by creating 109 another section header with STYP_OVRFLO set. */ 110 #define STYP_OVRFLO 0x8000 111 112 /********************** LINE NUMBERS **********************/ 113 114 /* 1 line number entry for every "breakpointable" source line in a section. 115 * Line numbers are grouped on a per function basis; first entry in a function 116 * grouping will have l_lnno = 0 and in place of physical address will be the 117 * symbol table index of the function name. 118 */ 119 struct external_lineno { 120 union { 121 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ 122 char l_paddr[4]; /* (physical) address of line number */ 123 } l_addr; 124 char l_lnno[2]; /* line number */ 125 }; 126 127 128 #define LINENO struct external_lineno 129 #define LINESZ 6 130 131 132 /********************** SYMBOLS **********************/ 133 134 #define E_SYMNMLEN 8 /* # characters in a symbol name */ 135 #define E_FILNMLEN 14 /* # characters in a file name */ 136 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ 137 138 struct external_syment 139 { 140 union { 141 char e_name[E_SYMNMLEN]; 142 struct { 143 char e_zeroes[4]; 144 char e_offset[4]; 145 } e; 146 } e; 147 char e_value[4]; 148 char e_scnum[2]; 149 char e_type[2]; 150 char e_sclass[1]; 151 char e_numaux[1]; 152 }; 153 154 155 156 #define N_BTMASK (017) 157 #define N_TMASK (060) 158 #define N_BTSHFT (4) 159 #define N_TSHIFT (2) 160 161 162 union external_auxent { 163 struct { 164 char x_tagndx[4]; /* str, un, or enum tag indx */ 165 union { 166 struct { 167 char x_lnno[2]; /* declaration line number */ 168 char x_size[2]; /* str/union/array size */ 169 } x_lnsz; 170 char x_fsize[4]; /* size of function */ 171 } x_misc; 172 union { 173 struct { /* if ISFCN, tag, or .bb */ 174 char x_lnnoptr[4]; /* ptr to fcn line # */ 175 char x_endndx[4]; /* entry ndx past block end */ 176 } x_fcn; 177 struct { /* if ISARY, up to 4 dimen. */ 178 char x_dimen[E_DIMNUM][2]; 179 } x_ary; 180 } x_fcnary; 181 char x_tvndx[2]; /* tv index */ 182 } x_sym; 183 184 union { 185 char x_fname[E_FILNMLEN]; 186 struct { 187 char x_zeroes[4]; 188 char x_offset[4]; 189 } x_n; 190 } x_file; 191 192 struct { 193 char x_scnlen[4]; /* section length */ 194 char x_nreloc[2]; /* # relocation entries */ 195 char x_nlinno[2]; /* # line numbers */ 196 } x_scn; 197 198 struct { 199 char x_tvfill[4]; /* tv fill value */ 200 char x_tvlen[2]; /* length of .tv */ 201 char x_tvran[2][2]; /* tv range */ 202 } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ 203 204 struct { 205 unsigned char x_scnlen[4]; 206 unsigned char x_parmhash[4]; 207 unsigned char x_snhash[2]; 208 unsigned char x_smtyp[1]; 209 unsigned char x_smclas[1]; 210 unsigned char x_stab[4]; 211 unsigned char x_snstab[2]; 212 } x_csect; 213 214 }; 215 216 #define SYMENT struct external_syment 217 #define SYMESZ 18 218 #define AUXENT union external_auxent 219 #define AUXESZ 18 220 #define DBXMASK 0x80 /* for dbx storage mask */ 221 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) 222 223 224 225 /********************** RELOCATION DIRECTIVES **********************/ 226 227 228 struct external_reloc { 229 char r_vaddr[4]; 230 char r_symndx[4]; 231 char r_size[1]; 232 char r_type[1]; 233 }; 234 235 236 #define RELOC struct external_reloc 237 #define RELSZ 10 238 239 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 240 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 241 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 242 /* For new sections we havn't heard of before */ 243 #define DEFAULT_SECTION_ALIGNMENT 4 244