1 #ifndef __A_OUT_GNU_H__ 2 #define __A_OUT_GNU_H__ 3 4 #ifdef __cplusplus 5 extern "C" { 6 #endif 7 8 #define __GNU_EXEC_MACROS__ 9 10 #ifndef __STRUCT_EXEC_OVERRIDE__ 11 12 struct exec 13 { 14 unsigned long a_info; /* Use macros N_MAGIC, etc for access */ 15 unsigned a_text; /* size of text, in bytes */ 16 unsigned a_data; /* size of data, in bytes */ 17 unsigned a_bss; /* size of uninitialized data area, in bytes */ 18 unsigned a_syms; /* length of symbol table data, in bytes */ 19 unsigned a_entry; /* start address */ 20 unsigned a_trsize; /* size of reloc info for text, in bytes */ 21 unsigned a_drsize; /* size of reloc info for data, in bytes */ 22 23 #if defined (sequent) && defined (i386) 24 struct gdtbl 25 { /* Global Descriptor Table */ 26 unsigned g_code[2]; 27 unsigned g_data[2]; 28 unsigned g_desc[2]; 29 } a_gdtbl; 30 unsigned a_shdata; /* size of initialized shared data */ 31 unsigned a_shbss; /* size of uninitialized shared data */ 32 unsigned a_shdrsize; /* size of shared data relocation */ 33 unsigned a_bootstrap[11]; /* bootstrap for standalone */ 34 unsigned a_reserved[3]; /* reserved for future use */ 35 unsigned a_version; /* object version */ 36 #endif /* Sequent Symmetry, Dynix 3.x */ 37 }; 38 39 #endif /* __STRUCT_EXEC_OVERRIDE__ */ 40 41 /* these go in the N_MACHTYPE field */ 42 enum machine_type { 43 #if defined (M_OLDSUN2) 44 M__OLDSUN2 = M_OLDSUN2, 45 #else 46 M_OLDSUN2 = 0, 47 #endif 48 #if defined (M_68010) 49 M__68010 = M_68010, 50 #else 51 M_68010 = 1, 52 #endif 53 #if defined (M_68020) 54 M__68020 = M_68020, 55 #else 56 M_68020 = 2, 57 #endif 58 #if defined (M_SPARC) 59 M__SPARC = M_SPARC, 60 #else 61 M_SPARC = 3, 62 #endif 63 /* skip a bunch so we don't run into any of sun's numbers */ 64 M_386 = 100 65 }; 66 67 #if defined (sequent) && defined (i386) 68 69 /* Dynix 3 wants the magic number to be the whole first longword. */ 70 71 #define N_MAGIC(exec) ((exec).a_info) 72 #define N_MACHTYPE(exec) 0 73 #define N_FLAGS(exec) 0 74 #define N_SET_INFO(exec, magic, type, flags) N_SET_MAGIC ((exec), (magic)) 75 #define N_SET_MAGIC(exec, magic) ((exec).a_info = (magic)) 76 #define N_SET_MACHTYPE(exec, machtype) ((void) 0) 77 #define N_SET_FLAGS(exec, flags) ((void) 0) 78 #define OMAGIC 0x12eb /* impure format - for .o's */ 79 #define ZMAGIC 0x22eb /* demand load format - zero at zero */ 80 #define NMAGIC you lose /* syntax error -- no pure format */ 81 #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != ZMAGIC) 82 #define N_ADDRADJ(x) (N_MAGIC(x) == ZMAGIC ? SEGMENT_SIZE : 0) 83 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text - N_ADDRADJ(x)) 84 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data + (x).a_shdata) 85 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize + (x).a_shdrsize) 86 #define N_TXTADDR(x) SEGMENT_SIZE 87 #define N_COMM 0x0a /** conflicts with N_INDR **/ 88 #define N_FN 0x0c 89 /* Note that the Dynix binutils believe that N_SET[TDB] are 90 N_SH{DATA,BSS,COMM} -- be wary when mixing GNU & Dynix objects. */ 91 #define PAGE_SIZE 4096 92 #define SEGMENT_SIZE PAGE_SIZE 93 94 #else /* !(sequent && i386) */ 95 96 #if !defined (N_MAGIC) 97 #define N_MAGIC(exec) ((exec).a_info & 0xffff) 98 #endif 99 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff)) 100 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff) 101 #define N_SET_INFO(exec, magic, type, flags) \ 102 ((exec).a_info = ((magic) & 0xffff) \ 103 | (((int)(type) & 0xff) << 16) \ 104 | (((flags) & 0xff) << 24)) 105 #define N_SET_MAGIC(exec, magic) \ 106 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff))) 107 108 #define N_SET_MACHTYPE(exec, machtype) \ 109 ((exec).a_info = \ 110 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16)) 111 112 #define N_SET_FLAGS(exec, flags) \ 113 ((exec).a_info = \ 114 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24)) 115 116 #endif /* sequent && i386 */ 117 118 #ifndef OMAGIC 119 /* Code indicating object file or impure executable. */ 120 #define OMAGIC 0407 121 /* Code indicating pure executable. */ 122 #define NMAGIC 0410 123 /* Code indicating demand-paged executable. */ 124 #define ZMAGIC 0413 125 #endif /* not OMAGIC */ 126 127 #if !defined (N_BADMAG) 128 #define N_BADMAG(x) \ 129 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \ 130 && N_MAGIC(x) != ZMAGIC) 131 #endif 132 133 #define _N_BADMAG(x) \ 134 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \ 135 && N_MAGIC(x) != ZMAGIC) 136 137 #ifndef sparc 138 #define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec)) 139 #else 140 #define _N_HDROFF(x) (- sizeof (struct exec)) 141 #endif 142 143 #if !defined (N_TXTOFF) 144 #define N_TXTOFF(x) \ 145 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec)) 146 #endif 147 148 #if !defined (N_DATOFF) 149 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text) 150 #endif 151 152 #if !defined (N_TRELOFF) 153 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data) 154 #endif 155 156 #if !defined (N_DRELOFF) 157 #define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize) 158 #endif 159 160 #if !defined (N_SYMOFF) 161 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize) 162 #endif 163 164 #if !defined (N_STROFF) 165 #define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms) 166 #endif 167 168 /* Address of text segment in memory after it is loaded. */ 169 #if !defined (N_TXTADDR) 170 #define N_TXTADDR(x) 0 171 #endif 172 173 /* Address of data segment in memory after it is loaded. 174 Note that it is up to you to define SEGMENT_SIZE 175 on machines not listed here. */ 176 #if defined (hp300) || defined (mips) 177 #define PAGE_SIZE 4096 178 #endif 179 #if defined (sparc) || defined (NeXT) 180 #define PAGE_SIZE 0x2000 181 #endif 182 #if defined (sony) || (defined (sun) && defined (mc68000)) 183 #define SEGMENT_SIZE 0x2000 184 #endif /* Sony or 68k Sun. */ 185 #ifdef is68k 186 #define SEGMENT_SIZE 0x20000 187 #endif 188 #if defined(m68k) && defined(PORTAR) 189 #define PAGE_SIZE 0x400 190 #endif 191 #if defined(i386) && !defined(sequent) 192 /* For COFF encapsulation. */ 193 #define SEGMENT_SIZE 0x400000 194 #endif 195 #ifndef SEGMENT_SIZE 196 /* This used to be first in this paragraph and under: 197 if (defined(vax) || defined(hp300) || defined(pyr) || defined(sparc) \ 198 || (defined(m68k) && defined(PORTAR)) \ 199 || defined (NeXT) || defined (mips)) */ 200 #define SEGMENT_SIZE PAGE_SIZE 201 #endif 202 #ifndef PAGE_SIZE 203 /* This value is for i386-minix, but that has no predefine. 204 Making it default will only cause confusion on machines 205 which have no proper value defined. */ 206 #define PAGE_SIZE 16 207 #endif 208 209 #define PAGSIZ PAGE_SIZE 210 #define SEGSIZ SEGMENT_SIZE 211 212 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1)) 213 214 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text) 215 216 #ifndef N_DATADDR 217 #define N_DATADDR(x) \ 218 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \ 219 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) 220 #endif 221 222 /* Address of bss segment in memory after it is loaded. */ 223 #if !defined (N_BSSADDR) 224 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data) 225 #endif 226 227 #if !defined (N_NLIST_DECLARED) 228 struct nlist { 229 union { 230 char *n_name; 231 struct nlist *n_next; 232 long n_strx; 233 } n_un; 234 unsigned char n_type; 235 char n_other; 236 short n_desc; 237 unsigned long n_value; 238 }; 239 #endif /* no N_NLIST_DECLARED. */ 240 241 #if !defined (N_UNDF) 242 #define N_UNDF 0 243 #endif 244 #if !defined (N_ABS) 245 #define N_ABS 2 246 #endif 247 #if !defined (N_TEXT) 248 #define N_TEXT 4 249 #endif 250 #if !defined (N_DATA) 251 #define N_DATA 6 252 #endif 253 #if !defined (N_BSS) 254 #define N_BSS 8 255 #endif 256 #if !defined (N_COMM) 257 #define N_COMM 18 258 #endif 259 #if !defined (N_FN) 260 #define N_FN 15 261 #endif 262 263 #if !defined (N_EXT) 264 #define N_EXT 1 265 #endif 266 #if !defined (N_TYPE) 267 #define N_TYPE 036 268 #endif 269 #if !defined (N_STAB) 270 #define N_STAB 0340 271 #endif 272 273 /* The following type indicates the definition of a symbol as being 274 an indirect reference to another symbol. The other symbol 275 appears as an undefined reference, immediately following this symbol. 276 277 Indirection is asymmetrical. The other symbol's value will be used 278 to satisfy requests for the indirect symbol, but not vice versa. 279 If the other symbol does not have a definition, libraries will 280 be searched to find a definition. */ 281 #define N_INDR 0xa 282 283 /* The following symbols refer to set elements. 284 All the N_SET[ATDB] symbols with the same name form one set. 285 Space is allocated for the set in the text section, and each set 286 element's value is stored into one word of the space. 287 The first word of the space is the length of the set (number of elements). 288 289 The address of the set is made into an N_SETV symbol 290 whose name is the same as the name of the set. 291 This symbol acts like a N_DATA global symbol 292 in that it can satisfy undefined external references. */ 293 294 /* These appear as input to LD, in a .o file. */ 295 #define N_SETA 0x14 /* Absolute set element symbol */ 296 #define N_SETT 0x16 /* Text set element symbol */ 297 #define N_SETD 0x18 /* Data set element symbol */ 298 #define N_SETB 0x1A /* Bss set element symbol */ 299 300 /* This is output from LD. */ 301 #define N_SETV 0x1C /* Pointer to set vector in data area. */ 302 303 #if !defined (N_RELOCATION_INFO_DECLARED) 304 /* This structure describes a single relocation to be performed. 305 The text-relocation section of the file is a vector of these structures, 306 all of which apply to the text section. 307 Likewise, the data-relocation section applies to the data section. */ 308 309 struct relocation_info 310 { 311 /* Address (within segment) to be relocated. */ 312 int r_address; 313 /* The meaning of r_symbolnum depends on r_extern. */ 314 unsigned int r_symbolnum:24; 315 /* Nonzero means value is a pc-relative offset 316 and it should be relocated for changes in its own address 317 as well as for changes in the symbol or section specified. */ 318 unsigned int r_pcrel:1; 319 /* Length (as exponent of 2) of the field to be relocated. 320 Thus, a value of 2 indicates 1<<2 bytes. */ 321 unsigned int r_length:2; 322 /* 1 => relocate with value of symbol. 323 r_symbolnum is the index of the symbol 324 in file's the symbol table. 325 0 => relocate with the address of a segment. 326 r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS 327 (the N_EXT bit may be set also, but signifies nothing). */ 328 unsigned int r_extern:1; 329 /* Four bits that aren't used, but when writing an object file 330 it is desirable to clear them. */ 331 unsigned int r_pad:4; 332 }; 333 #endif /* no N_RELOCATION_INFO_DECLARED. */ 334 335 #ifdef __cplusplus 336 } 337 #endif 338 339 #endif /* __A_OUT_GNU_H__ */ 340