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The C and C++ Include Header Files
/usr/include/linux/a.out.h
$ cat -n /usr/include/linux/a.out.h 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __A_OUT_GNU_H__ 3 #define __A_OUT_GNU_H__ 4 5 #define __GNU_EXEC_MACROS__ 6 7 #ifndef __STRUCT_EXEC_OVERRIDE__ 8 9 #include <asm/a.out.h> 10 11 #endif /* __STRUCT_EXEC_OVERRIDE__ */ 12 13 #ifndef __ASSEMBLY__ 14 15 /* these go in the N_MACHTYPE field */ 16 enum machine_type { 17 #if defined (M_OLDSUN2) 18 M__OLDSUN2 = M_OLDSUN2, 19 #else 20 M_OLDSUN2 = 0, 21 #endif 22 #if defined (M_68010) 23 M__68010 = M_68010, 24 #else 25 M_68010 = 1, 26 #endif 27 #if defined (M_68020) 28 M__68020 = M_68020, 29 #else 30 M_68020 = 2, 31 #endif 32 #if defined (M_SPARC) 33 M__SPARC = M_SPARC, 34 #else 35 M_SPARC = 3, 36 #endif 37 /* skip a bunch so we don't run into any of sun's numbers */ 38 M_386 = 100, 39 M_MIPS1 = 151, /* MIPS R3000/R3000 binary */ 40 M_MIPS2 = 152 /* MIPS R6000/R4000 binary */ 41 }; 42 43 #if !defined (N_MAGIC) 44 #define N_MAGIC(exec) ((exec).a_info & 0xffff) 45 #endif 46 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff)) 47 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff) 48 #define N_SET_INFO(exec, magic, type, flags) \ 49 ((exec).a_info = ((magic) & 0xffff) \ 50 | (((int)(type) & 0xff) << 16) \ 51 | (((flags) & 0xff) << 24)) 52 #define N_SET_MAGIC(exec, magic) \ 53 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff))) 54 55 #define N_SET_MACHTYPE(exec, machtype) \ 56 ((exec).a_info = \ 57 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16)) 58 59 #define N_SET_FLAGS(exec, flags) \ 60 ((exec).a_info = \ 61 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24)) 62 63 /* Code indicating object file or impure executable. */ 64 #define OMAGIC 0407 65 /* Code indicating pure executable. */ 66 #define NMAGIC 0410 67 /* Code indicating demand-paged executable. */ 68 #define ZMAGIC 0413 69 /* This indicates a demand-paged executable with the header in the text. 70 The first page is unmapped to help trap NULL pointer references */ 71 #define QMAGIC 0314 72 73 /* Code indicating core file. */ 74 #define CMAGIC 0421 75 76 #if !defined (N_BADMAG) 77 #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ 78 && N_MAGIC(x) != NMAGIC \ 79 && N_MAGIC(x) != ZMAGIC \ 80 && N_MAGIC(x) != QMAGIC) 81 #endif 82 83 #define _N_HDROFF(x) (1024 - sizeof (struct exec)) 84 85 #if !defined (N_TXTOFF) 86 #define N_TXTOFF(x) \ 87 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \ 88 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec))) 89 #endif 90 91 #if !defined (N_DATOFF) 92 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text) 93 #endif 94 95 #if !defined (N_TRELOFF) 96 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data) 97 #endif 98 99 #if !defined (N_DRELOFF) 100 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x)) 101 #endif 102 103 #if !defined (N_SYMOFF) 104 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x)) 105 #endif 106 107 #if !defined (N_STROFF) 108 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x)) 109 #endif 110 111 /* Address of text segment in memory after it is loaded. */ 112 #if !defined (N_TXTADDR) 113 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0) 114 #endif 115 116 /* Address of data segment in memory after it is loaded. */ 117 #include <unistd.h> 118 #if defined(__i386__) || defined(__mc68000__) 119 #define SEGMENT_SIZE 1024 120 #else 121 #ifndef SEGMENT_SIZE 122 #define SEGMENT_SIZE getpagesize() 123 #endif 124 #endif 125 126 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE) 127 128 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text) 129 130 #ifndef N_DATADDR 131 #define N_DATADDR(x) \ 132 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \ 133 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) 134 #endif 135 136 /* Address of bss segment in memory after it is loaded. */ 137 #if !defined (N_BSSADDR) 138 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data) 139 #endif 140 141 #if !defined (N_NLIST_DECLARED) 142 struct nlist { 143 union { 144 char *n_name; 145 struct nlist *n_next; 146 long n_strx; 147 } n_un; 148 unsigned char n_type; 149 char n_other; 150 short n_desc; 151 unsigned long n_value; 152 }; 153 #endif /* no N_NLIST_DECLARED. */ 154 155 #if !defined (N_UNDF) 156 #define N_UNDF 0 157 #endif 158 #if !defined (N_ABS) 159 #define N_ABS 2 160 #endif 161 #if !defined (N_TEXT) 162 #define N_TEXT 4 163 #endif 164 #if !defined (N_DATA) 165 #define N_DATA 6 166 #endif 167 #if !defined (N_BSS) 168 #define N_BSS 8 169 #endif 170 #if !defined (N_FN) 171 #define N_FN 15 172 #endif 173 174 #if !defined (N_EXT) 175 #define N_EXT 1 176 #endif 177 #if !defined (N_TYPE) 178 #define N_TYPE 036 179 #endif 180 #if !defined (N_STAB) 181 #define N_STAB 0340 182 #endif 183 184 /* The following type indicates the definition of a symbol as being 185 an indirect reference to another symbol. The other symbol 186 appears as an undefined reference, immediately following this symbol. 187 188 Indirection is asymmetrical. The other symbol's value will be used 189 to satisfy requests for the indirect symbol, but not vice versa. 190 If the other symbol does not have a definition, libraries will 191 be searched to find a definition. */ 192 #define N_INDR 0xa 193 194 /* The following symbols refer to set elements. 195 All the N_SET[ATDB] symbols with the same name form one set. 196 Space is allocated for the set in the text section, and each set 197 element's value is stored into one word of the space. 198 The first word of the space is the length of the set (number of elements). 199 200 The address of the set is made into an N_SETV symbol 201 whose name is the same as the name of the set. 202 This symbol acts like a N_DATA global symbol 203 in that it can satisfy undefined external references. */ 204 205 /* These appear as input to LD, in a .o file. */ 206 #define N_SETA 0x14 /* Absolute set element symbol */ 207 #define N_SETT 0x16 /* Text set element symbol */ 208 #define N_SETD 0x18 /* Data set element symbol */ 209 #define N_SETB 0x1A /* Bss set element symbol */ 210 211 /* This is output from LD. */ 212 #define N_SETV 0x1C /* Pointer to set vector in data area. */ 213 214 #if !defined (N_RELOCATION_INFO_DECLARED) 215 /* This structure describes a single relocation to be performed. 216 The text-relocation section of the file is a vector of these structures, 217 all of which apply to the text section. 218 Likewise, the data-relocation section applies to the data section. */ 219 220 struct relocation_info 221 { 222 /* Address (within segment) to be relocated. */ 223 int r_address; 224 /* The meaning of r_symbolnum depends on r_extern. */ 225 unsigned int r_symbolnum:24; 226 /* Nonzero means value is a pc-relative offset 227 and it should be relocated for changes in its own address 228 as well as for changes in the symbol or section specified. */ 229 unsigned int r_pcrel:1; 230 /* Length (as exponent of 2) of the field to be relocated. 231 Thus, a value of 2 indicates 1<<2 bytes. */ 232 unsigned int r_length:2; 233 /* 1 => relocate with value of symbol. 234 r_symbolnum is the index of the symbol 235 in file's the symbol table. 236 0 => relocate with the address of a segment. 237 r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS 238 (the N_EXT bit may be set also, but signifies nothing). */ 239 unsigned int r_extern:1; 240 /* Four bits that aren't used, but when writing an object file 241 it is desirable to clear them. */ 242 unsigned int r_pad:4; 243 }; 244 #endif /* no N_RELOCATION_INFO_DECLARED. */ 245 246 #endif /*__ASSEMBLY__ */ 247 #endif /* __A_OUT_GNU_H__ */
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