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