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

INCLUDED FROM
