include/linux/a.out.h

   1 #ifndef __A_OUT_GNU_H__
   2 #define __A_OUT_GNU_H__
   3
   4 #define __GNU_EXEC_MACROS__
   5
   6 #ifndef __STRUCT_EXEC_OVERRIDE__
   7
   8 #include <asm/a.out.h>
   9
  10 #endif /* __STRUCT_EXEC_OVERRIDE__ */
  11
  12 /* these go in the N_MACHTYPE field */
  13 enum machine_type {
  14 #if defined (M_OLDSUN2)
  15   M__OLDSUN2 = M_OLDSUN2,
  16 #else
  17   M_OLDSUN2 = 0,
  18 #endif
  19 #if defined (M_68010)
  20   M__68010 = M_68010,
  21 #else
  22   M_68010 = 1,
  23 #endif
  24 #if defined (M_68020)
  25   M__68020 = M_68020,
  26 #else
  27   M_68020 = 2,
  28 #endif
  29 #if defined (M_SPARC)
  30   M__SPARC = M_SPARC,
  31 #else
  32   M_SPARC = 3,
  33 #endif
  34   /* skip a bunch so we don't run into any of sun's numbers */
  35   M_386 = 100,
  36   M_MIPS1 = 151,        /* MIPS R3000/R3000 binary */
  37   M_MIPS2 = 152         /* MIPS R6000/R4000 binary */
  38 };
  39
  40 #if !defined (N_MAGIC)
  41 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
  42 #endif
  43 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
  44 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
  45 #define N_SET_INFO(exec, magic, type, flags) \
  46         ((exec).a_info = ((magic) & 0xffff) \
  47          | (((int)(type) & 0xff) << 16) \
  48          | (((flags) & 0xff) << 24))
  49 #define N_SET_MAGIC(exec, magic) \
  50         ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
  51
  52 #define N_SET_MACHTYPE(exec, machtype) \
  53         ((exec).a_info = \
  54          ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
  55
  56 #define N_SET_FLAGS(exec, flags) \
  57         ((exec).a_info = \
  58          ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
  59
  60 /* Code indicating object file or impure executable.  */
  61 #define OMAGIC 0407
  62 /* Code indicating pure executable.  */
  63 #define NMAGIC 0410
  64 /* Code indicating demand-paged executable.  */
  65 #define ZMAGIC 0413
  66 /* This indicates a demand-paged executable with the header in the text.
  67    The first page is unmapped to help trap NULL pointer references */
  68 #define QMAGIC 0314
  69
  70 /* Code indicating core file.  */
  71 #define CMAGIC 0421
  72
  73 #if !defined (N_BADMAG)
  74 #define N_BADMAG(x)       (N_MAGIC(x) != OMAGIC         \
  75                         && N_MAGIC(x) != NMAGIC         \
  76                         && N_MAGIC(x) != ZMAGIC \
  77                         && N_MAGIC(x) != QMAGIC)
  78 #endif
  79
  80 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
  81
  82 #if !defined (N_TXTOFF)
  83 #define N_TXTOFF(x) \
  84  (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
  85   (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
  86 #endif
  87
  88 #if !defined (N_DATOFF)
  89 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
  90 #endif
  91
  92 #if !defined (N_TRELOFF)
  93 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
  94 #endif
  95
  96 #if !defined (N_DRELOFF)
  97 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
  98 #endif
  99
 100 #if !defined (N_SYMOFF)
 101 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
 102 #endif
 103
 104 #if !defined (N_STROFF)
 105 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
 106 #endif
 107
 108 /* Address of text segment in memory after it is loaded.  */
 109 #if !defined (N_TXTADDR)
 110 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
 111 #endif
 112
 113 /* Address of data segment in memory after it is loaded.
 114    Note that it is up to you to define SEGMENT_SIZE
 115    on machines not listed here.  */
 116 #if defined(vax) || defined(hp300) || defined(pyr)
 117 #define SEGMENT_SIZE page_size
 118 #endif
 119 #ifdef  sony
 120 #define SEGMENT_SIZE    0x2000
 121 #endif  /* Sony.  */
 122 #ifdef is68k
 123 #define SEGMENT_SIZE 0x20000
 124 #endif
 125 #if defined(m68k) && defined(PORTAR)
 126 #define PAGE_SIZE 0x400
 127 #define SEGMENT_SIZE PAGE_SIZE
 128 #endif
 129
 130 #ifdef linux
 131 #ifdef __KERNEL__
 132 #include <asm/page.h>
 133 #else
 134 #include <unistd.h>
 135 #endif
 136 #if defined(__i386__) || defined(__mc68000__)
 137 #define SEGMENT_SIZE    1024
 138 #else
 139 #ifndef SEGMENT_SIZE
 140 #ifdef __KERNEL__
 141 #define SEGMENT_SIZE    PAGE_SIZE
 142 #else
 143 #define SEGMENT_SIZE   getpagesize()
 144 #endif
 145 #endif
 146 #endif
 147 #endif
 148
 149 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
 150
 151 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
 152
 153 #ifndef N_DATADDR
 154 #define N_DATADDR(x) \
 155     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
 156      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
 157 #endif
 158
 159 /* Address of bss segment in memory after it is loaded.  */
 160 #if !defined (N_BSSADDR)
 161 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
 162 #endif
 163 \f
 164 #if !defined (N_NLIST_DECLARED)
 165 struct nlist {
 166   union {
 167     char *n_name;
 168     struct nlist *n_next;
 169     long n_strx;
 170   } n_un;
 171   unsigned char n_type;
 172   char n_other;
 173   short n_desc;
 174   unsigned long n_value;
 175 };
 176 #endif /* no N_NLIST_DECLARED.  */
 177
 178 #if !defined (N_UNDF)
 179 #define N_UNDF 0
 180 #endif
 181 #if !defined (N_ABS)
 182 #define N_ABS 2
 183 #endif
 184 #if !defined (N_TEXT)
 185 #define N_TEXT 4
 186 #endif
 187 #if !defined (N_DATA)
 188 #define N_DATA 6
 189 #endif
 190 #if !defined (N_BSS)
 191 #define N_BSS 8
 192 #endif
 193 #if !defined (N_FN)
 194 #define N_FN 15
 195 #endif
 196
 197 #if !defined (N_EXT)
 198 #define N_EXT 1
 199 #endif
 200 #if !defined (N_TYPE)
 201 #define N_TYPE 036
 202 #endif
 203 #if !defined (N_STAB)
 204 #define N_STAB 0340
 205 #endif
 206
 207 /* The following type indicates the definition of a symbol as being
 208    an indirect reference to another symbol.  The other symbol
 209    appears as an undefined reference, immediately following this symbol.
 210
 211    Indirection is asymmetrical.  The other symbol's value will be used
 212    to satisfy requests for the indirect symbol, but not vice versa.
 213    If the other symbol does not have a definition, libraries will
 214    be searched to find a definition.  */
 215 #define N_INDR 0xa
 216
 217 /* The following symbols refer to set elements.
 218    All the N_SET[ATDB] symbols with the same name form one set.
 219    Space is allocated for the set in the text section, and each set
 220    element's value is stored into one word of the space.
 221    The first word of the space is the length of the set (number of elements).
 222
 223    The address of the set is made into an N_SETV symbol
 224    whose name is the same as the name of the set.
 225    This symbol acts like a N_DATA global symbol
 226    in that it can satisfy undefined external references.  */
 227
 228 /* These appear as input to LD, in a .o file.  */
 229 #define N_SETA  0x14            /* Absolute set element symbol */
 230 #define N_SETT  0x16            /* Text set element symbol */
 231 #define N_SETD  0x18            /* Data set element symbol */
 232 #define N_SETB  0x1A            /* Bss set element symbol */
 233
 234 /* This is output from LD.  */
 235 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 236 \f
 237 #if !defined (N_RELOCATION_INFO_DECLARED)
 238 /* This structure describes a single relocation to be performed.
 239    The text-relocation section of the file is a vector of these structures,
 240    all of which apply to the text section.
 241    Likewise, the data-relocation section applies to the data section.  */
 242
 243 struct relocation_info
 244 {
 245   /* Address (within segment) to be relocated.  */
 246   int r_address;
 247   /* The meaning of r_symbolnum depends on r_extern.  */
 248   unsigned int r_symbolnum:24;
 249   /* Nonzero means value is a pc-relative offset
 250      and it should be relocated for changes in its own address
 251      as well as for changes in the symbol or section specified.  */
 252   unsigned int r_pcrel:1;
 253   /* Length (as exponent of 2) of the field to be relocated.
 254      Thus, a value of 2 indicates 1<<2 bytes.  */
 255   unsigned int r_length:2;
 256   /* 1 => relocate with value of symbol.
 257           r_symbolnum is the index of the symbol
 258           in file's the symbol table.
 259      0 => relocate with the address of a segment.
 260           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 261           (the N_EXT bit may be set also, but signifies nothing).  */
 262   unsigned int r_extern:1;
 263   /* Four bits that aren't used, but when writing an object file
 264      it is desirable to clear them.  */
 265 #ifdef NS32K
 266   unsigned r_bsr:1;
 267   unsigned r_disp:1;
 268   unsigned r_pad:2;
 269 #else
 270   unsigned int r_pad:4;
 271 #endif
 272 };
 273 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 274
 275
 276 #endif /* __A_OUT_GNU_H__ */