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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 | /* SPDX-License-Identifier: GPL-2.0 */ /* IBM RS/6000 "XCOFF" file definitions for BFD. Copyright (C) 1990, 1991 Free Software Foundation, Inc. FIXME: Can someone provide a transliteration of this name into ASCII? Using the following chars caused a compiler warning on HIUX (so I replaced them with octal escapes), and isn't useful without an understanding of what character set it is. Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM and John Gilmore of Cygnus Support. */ /********************** FILE HEADER **********************/ struct external_filehdr { char f_magic[2]; /* magic number */ char f_nscns[2]; /* number of sections */ char f_timdat[4]; /* time & date stamp */ char f_symptr[4]; /* file pointer to symtab */ char f_nsyms[4]; /* number of symtab entries */ char f_opthdr[2]; /* sizeof(optional hdr) */ char f_flags[2]; /* flags */ }; /* IBM RS/6000 */ #define U802WRMAGIC 0730 /* writeable text segments **chh** */ #define U802ROMAGIC 0735 /* readonly sharable text segments */ #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ #define BADMAG(x) \ ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ (x).f_magic != U802TOCMAGIC) #define FILHDR struct external_filehdr #define FILHSZ 20 /********************** AOUT "OPTIONAL HEADER" **********************/ typedef struct { unsigned char magic[2]; /* type of file */ unsigned char vstamp[2]; /* version stamp */ unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ unsigned char dsize[4]; /* initialized data " " */ unsigned char bsize[4]; /* uninitialized data " " */ unsigned char entry[4]; /* entry pt. */ unsigned char text_start[4]; /* base of text used for this file */ unsigned char data_start[4]; /* base of data used for this file */ unsigned char o_toc[4]; /* address of TOC */ unsigned char o_snentry[2]; /* section number of entry point */ unsigned char o_sntext[2]; /* section number of .text section */ unsigned char o_sndata[2]; /* section number of .data section */ unsigned char o_sntoc[2]; /* section number of TOC */ unsigned char o_snloader[2]; /* section number of .loader section */ unsigned char o_snbss[2]; /* section number of .bss section */ unsigned char o_algntext[2]; /* .text alignment */ unsigned char o_algndata[2]; /* .data alignment */ unsigned char o_modtype[2]; /* module type (??) */ unsigned char o_cputype[2]; /* cpu type */ unsigned char o_maxstack[4]; /* max stack size (??) */ unsigned char o_maxdata[4]; /* max data size (??) */ unsigned char o_resv2[12]; /* reserved */ } AOUTHDR; #define AOUTSZ 72 #define SMALL_AOUTSZ (28) #define AOUTHDRSZ 72 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ /********************** SECTION HEADER **********************/ struct external_scnhdr { char s_name[8]; /* section name */ char s_paddr[4]; /* physical address, aliased s_nlib */ char s_vaddr[4]; /* virtual address */ char s_size[4]; /* section size */ char s_scnptr[4]; /* file ptr to raw data for section */ char s_relptr[4]; /* file ptr to relocation */ char s_lnnoptr[4]; /* file ptr to line numbers */ char s_nreloc[2]; /* number of relocation entries */ char s_nlnno[2]; /* number of line number entries*/ char s_flags[4]; /* flags */ }; /* * names of "special" sections */ #define _TEXT ".text" #define _DATA ".data" #define _BSS ".bss" #define _PAD ".pad" #define _LOADER ".loader" #define SCNHDR struct external_scnhdr #define SCNHSZ 40 /* XCOFF uses a special .loader section with type STYP_LOADER. */ #define STYP_LOADER 0x1000 /* XCOFF uses a special .debug section with type STYP_DEBUG. */ #define STYP_DEBUG 0x2000 /* XCOFF handles line number or relocation overflow by creating another section header with STYP_OVRFLO set. */ #define STYP_OVRFLO 0x8000 /********************** LINE NUMBERS **********************/ /* 1 line number entry for every "breakpointable" source line in a section. * Line numbers are grouped on a per function basis; first entry in a function * grouping will have l_lnno = 0 and in place of physical address will be the * symbol table index of the function name. */ struct external_lineno { union { char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ char l_paddr[4]; /* (physical) address of line number */ } l_addr; char l_lnno[2]; /* line number */ }; #define LINENO struct external_lineno #define LINESZ 6 /********************** SYMBOLS **********************/ #define E_SYMNMLEN 8 /* # characters in a symbol name */ #define E_FILNMLEN 14 /* # characters in a file name */ #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ struct external_syment { union { char e_name[E_SYMNMLEN]; struct { char e_zeroes[4]; char e_offset[4]; } e; } e; char e_value[4]; char e_scnum[2]; char e_type[2]; char e_sclass[1]; char e_numaux[1]; }; #define N_BTMASK (017) #define N_TMASK (060) #define N_BTSHFT (4) #define N_TSHIFT (2) union external_auxent { struct { char x_tagndx[4]; /* str, un, or enum tag indx */ union { struct { char x_lnno[2]; /* declaration line number */ char x_size[2]; /* str/union/array size */ } x_lnsz; char x_fsize[4]; /* size of function */ } x_misc; union { struct { /* if ISFCN, tag, or .bb */ char x_lnnoptr[4]; /* ptr to fcn line # */ char x_endndx[4]; /* entry ndx past block end */ } x_fcn; struct { /* if ISARY, up to 4 dimen. */ char x_dimen[E_DIMNUM][2]; } x_ary; } x_fcnary; char x_tvndx[2]; /* tv index */ } x_sym; union { char x_fname[E_FILNMLEN]; struct { char x_zeroes[4]; char x_offset[4]; } x_n; } x_file; struct { char x_scnlen[4]; /* section length */ char x_nreloc[2]; /* # relocation entries */ char x_nlinno[2]; /* # line numbers */ } x_scn; struct { char x_tvfill[4]; /* tv fill value */ char x_tvlen[2]; /* length of .tv */ char x_tvran[2][2]; /* tv range */ } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ struct { unsigned char x_scnlen[4]; unsigned char x_parmhash[4]; unsigned char x_snhash[2]; unsigned char x_smtyp[1]; unsigned char x_smclas[1]; unsigned char x_stab[4]; unsigned char x_snstab[2]; } x_csect; }; #define SYMENT struct external_syment #define SYMESZ 18 #define AUXENT union external_auxent #define AUXESZ 18 #define DBXMASK 0x80 /* for dbx storage mask */ #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) /********************** RELOCATION DIRECTIVES **********************/ struct external_reloc { char r_vaddr[4]; char r_symndx[4]; char r_size[1]; char r_type[1]; }; #define RELOC struct external_reloc #define RELSZ 10 #define DEFAULT_DATA_SECTION_ALIGNMENT 4 #define DEFAULT_BSS_SECTION_ALIGNMENT 4 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 /* For new sections we haven't heard of before */ #define DEFAULT_SECTION_ALIGNMENT 4 |