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 #include <asm/page.h>
 132 #if defined(__i386__) || defined(__mc68000__)
 133 #define SEGMENT_SIZE    1024
 134 #else
 135 #ifndef SEGMENT_SIZE
 136 #define SEGMENT_SIZE    PAGE_SIZE
 137 #endif
 138 #endif
 139 #endif
 140
 141 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
 142
 143 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
 144
 145 #ifndef N_DATADDR
 146 #define N_DATADDR(x) \
 147     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
 148      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
 149 #endif
 150
 151 /* Address of bss segment in memory after it is loaded.  */
 152 #if !defined (N_BSSADDR)
 153 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
 154 #endif
 155 \f
 156 #if !defined (N_NLIST_DECLARED)
 157 struct nlist {
 158   union {
 159     char *n_name;
 160     struct nlist *n_next;
 161     long n_strx;
 162   } n_un;
 163   unsigned char n_type;
 164   char n_other;
 165   short n_desc;
 166   unsigned long n_value;
 167 };
 168 #endif /* no N_NLIST_DECLARED.  */
 169
 170 #if !defined (N_UNDF)
 171 #define N_UNDF 0
 172 #endif
 173 #if !defined (N_ABS)
 174 #define N_ABS 2
 175 #endif
 176 #if !defined (N_TEXT)
 177 #define N_TEXT 4
 178 #endif
 179 #if !defined (N_DATA)
 180 #define N_DATA 6
 181 #endif
 182 #if !defined (N_BSS)
 183 #define N_BSS 8
 184 #endif
 185 #if !defined (N_FN)
 186 #define N_FN 15
 187 #endif
 188
 189 #if !defined (N_EXT)
 190 #define N_EXT 1
 191 #endif
 192 #if !defined (N_TYPE)
 193 #define N_TYPE 036
 194 #endif
 195 #if !defined (N_STAB)
 196 #define N_STAB 0340
 197 #endif
 198
 199 /* The following type indicates the definition of a symbol as being
 200    an indirect reference to another symbol.  The other symbol
 201    appears as an undefined reference, immediately following this symbol.
 202
 203    Indirection is asymmetrical.  The other symbol's value will be used
 204    to satisfy requests for the indirect symbol, but not vice versa.
 205    If the other symbol does not have a definition, libraries will
 206    be searched to find a definition.  */
 207 #define N_INDR 0xa
 208
 209 /* The following symbols refer to set elements.
 210    All the N_SET[ATDB] symbols with the same name form one set.
 211    Space is allocated for the set in the text section, and each set
 212    element's value is stored into one word of the space.
 213    The first word of the space is the length of the set (number of elements).
 214
 215    The address of the set is made into an N_SETV symbol
 216    whose name is the same as the name of the set.
 217    This symbol acts like a N_DATA global symbol
 218    in that it can satisfy undefined external references.  */
 219
 220 /* These appear as input to LD, in a .o file.  */
 221 #define N_SETA  0x14            /* Absolute set element symbol */
 222 #define N_SETT  0x16            /* Text set element symbol */
 223 #define N_SETD  0x18            /* Data set element symbol */
 224 #define N_SETB  0x1A            /* Bss set element symbol */
 225
 226 /* This is output from LD.  */
 227 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 228 \f
 229 #if !defined (N_RELOCATION_INFO_DECLARED)
 230 /* This structure describes a single relocation to be performed.
 231    The text-relocation section of the file is a vector of these structures,
 232    all of which apply to the text section.
 233    Likewise, the data-relocation section applies to the data section.  */
 234
 235 struct relocation_info
 236 {
 237   /* Address (within segment) to be relocated.  */
 238   int r_address;
 239   /* The meaning of r_symbolnum depends on r_extern.  */
 240   unsigned int r_symbolnum:24;
 241   /* Nonzero means value is a pc-relative offset
 242      and it should be relocated for changes in its own address
 243      as well as for changes in the symbol or section specified.  */
 244   unsigned int r_pcrel:1;
 245   /* Length (as exponent of 2) of the field to be relocated.
 246      Thus, a value of 2 indicates 1<<2 bytes.  */
 247   unsigned int r_length:2;
 248   /* 1 => relocate with value of symbol.
 249           r_symbolnum is the index of the symbol
 250           in file's the symbol table.
 251      0 => relocate with the address of a segment.
 252           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 253           (the N_EXT bit may be set also, but signifies nothing).  */
 254   unsigned int r_extern:1;
 255   /* Four bits that aren't used, but when writing an object file
 256      it is desirable to clear them.  */
 257 #ifdef NS32K
 258   unsigned r_bsr:1;
 259   unsigned r_disp:1;
 260   unsigned r_pad:2;
 261 #else
 262   unsigned int r_pad:4;
 263 #endif
 264 };
 265 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 266
 267
 268 #endif /* __A_OUT_GNU_H__ */