Paul Mackerras | 66a45dd | 2006-01-14 15:04:06 +1100 | [diff] [blame] | 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 |
Adam Buchbinder | 446957b | 2016-02-24 10:51:11 -0800 | [diff] [blame] | 242 | /* For new sections we haven't heard of before */ |
Paul Mackerras | 66a45dd | 2006-01-14 15:04:06 +1100 | [diff] [blame] | 243 | #define DEFAULT_SECTION_ALIGNMENT 4 |