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) + (x).a_trsize)
  98 #endif
  99 
 100 #if !defined (N_SYMOFF)
 101 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
 102 #endif
 103 
 104 #if !defined (N_STROFF)
 105 #define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
 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 #ifdef __i386__
 133 #define SEGMENT_SIZE    1024
 134 #else
 135 #define SEGMENT_SIZE    PAGE_SIZE
 136 #endif
 137 #endif
 138 
 139 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
 140 
 141 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
 142 
 143 #ifndef N_DATADDR
 144 #define N_DATADDR(x) \
 145     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
 146      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
 147 #endif
 148 
 149 /* Address of bss segment in memory after it is loaded.  */
 150 #if !defined (N_BSSADDR)
 151 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
 152 #endif
 153 
 154 #if !defined (N_NLIST_DECLARED)
 155 struct nlist {
 156   union {
 157     char *n_name;
 158     struct nlist *n_next;
 159     long n_strx;
 160   } n_un;
 161   unsigned char n_type;
 162   char n_other;
 163   short n_desc;
 164   unsigned long n_value;
 165 };
 166 #endif /* no N_NLIST_DECLARED.  */
 167 
 168 #if !defined (N_UNDF)
 169 #define N_UNDF 0
 170 #endif
 171 #if !defined (N_ABS)
 172 #define N_ABS 2
 173 #endif
 174 #if !defined (N_TEXT)
 175 #define N_TEXT 4
 176 #endif
 177 #if !defined (N_DATA)
 178 #define N_DATA 6
 179 #endif
 180 #if !defined (N_BSS)
 181 #define N_BSS 8
 182 #endif
 183 #if !defined (N_FN)
 184 #define N_FN 15
 185 #endif
 186 
 187 #if !defined (N_EXT)
 188 #define N_EXT 1
 189 #endif
 190 #if !defined (N_TYPE)
 191 #define N_TYPE 036
 192 #endif
 193 #if !defined (N_STAB)
 194 #define N_STAB 0340
 195 #endif
 196 
 197 /* The following type indicates the definition of a symbol as being
 198    an indirect reference to another symbol.  The other symbol
 199    appears as an undefined reference, immediately following this symbol.
 200 
 201    Indirection is asymmetrical.  The other symbol's value will be used
 202    to satisfy requests for the indirect symbol, but not vice versa.
 203    If the other symbol does not have a definition, libraries will
 204    be searched to find a definition.  */
 205 #define N_INDR 0xa
 206 
 207 /* The following symbols refer to set elements.
 208    All the N_SET[ATDB] symbols with the same name form one set.
 209    Space is allocated for the set in the text section, and each set
 210    element's value is stored into one word of the space.
 211    The first word of the space is the length of the set (number of elements).
 212 
 213    The address of the set is made into an N_SETV symbol
 214    whose name is the same as the name of the set.
 215    This symbol acts like a N_DATA global symbol
 216    in that it can satisfy undefined external references.  */
 217 
 218 /* These appear as input to LD, in a .o file.  */
 219 #define N_SETA  0x14            /* Absolute set element symbol */
 220 #define N_SETT  0x16            /* Text set element symbol */
 221 #define N_SETD  0x18            /* Data set element symbol */
 222 #define N_SETB  0x1A            /* Bss set element symbol */
 223 
 224 /* This is output from LD.  */
 225 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 226 
 227 #if !defined (N_RELOCATION_INFO_DECLARED)
 228 /* This structure describes a single relocation to be performed.
 229    The text-relocation section of the file is a vector of these structures,
 230    all of which apply to the text section.
 231    Likewise, the data-relocation section applies to the data section.  */
 232 
 233 struct relocation_info
 234 {
 235   /* Address (within segment) to be relocated.  */
 236   int r_address;
 237   /* The meaning of r_symbolnum depends on r_extern.  */
 238   unsigned int r_symbolnum:24;
 239   /* Nonzero means value is a pc-relative offset
 240      and it should be relocated for changes in its own address
 241      as well as for changes in the symbol or section specified.  */
 242   unsigned int r_pcrel:1;
 243   /* Length (as exponent of 2) of the field to be relocated.
 244      Thus, a value of 2 indicates 1<<2 bytes.  */
 245   unsigned int r_length:2;
 246   /* 1 => relocate with value of symbol.
 247           r_symbolnum is the index of the symbol
 248           in file's the symbol table.
 249      0 => relocate with the address of a segment.
 250           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 251           (the N_EXT bit may be set also, but signifies nothing).  */
 252   unsigned int r_extern:1;
 253   /* Four bits that aren't used, but when writing an object file
 254      it is desirable to clear them.  */
 255 #ifdef NS32K
 256   unsigned r_bsr:1;
 257   unsigned r_disp:1;
 258   unsigned r_pad:2;
 259 #else
 260   unsigned int r_pad:4;
 261 #endif
 262 };
 263 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 264 
 265 
 266 #endif /* __A_OUT_GNU_H__ */
/* */
root/include/linux/a.out.h

INCLUDED FROM
