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 
  75 /* Code indicating core file.  */
  76 #define CMAGIC 0421
  77 #if !defined (N_BADMAG)
  78 #define N_BADMAG(x)                                     \
  79  (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC          \
  80   && N_MAGIC(x) != ZMAGIC)
  81 #endif
  82 
  83 #define _N_BADMAG(x)                                    \
  84  (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC          \
  85   && N_MAGIC(x) != ZMAGIC)
  86 
  87 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
  88 
  89 #if !defined (N_TXTOFF)
  90 #define N_TXTOFF(x) \
  91  (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
  92 #endif
  93 
  94 #if !defined (N_DATOFF)
  95 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
  96 #endif
  97 
  98 #if !defined (N_TRELOFF)
  99 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
 100 #endif
 101 
 102 #if !defined (N_DRELOFF)
 103 #define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
 104 #endif
 105 
 106 #if !defined (N_SYMOFF)
 107 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
 108 #endif
 109 
 110 #if !defined (N_STROFF)
 111 #define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
 112 #endif
 113 
 114 /* Address of text segment in memory after it is loaded.  */
 115 #if !defined (N_TXTADDR)
 116 #define N_TXTADDR(x) 0
 117 #endif
 118 
 119 /* Address of data segment in memory after it is loaded.
 120    Note that it is up to you to define SEGMENT_SIZE
 121    on machines not listed here.  */
 122 #if defined(vax) || defined(hp300) || defined(pyr)
 123 #define SEGMENT_SIZE page_size
 124 #endif
 125 #ifdef  sony
 126 #define SEGMENT_SIZE    0x2000
 127 #endif  /* Sony.  */
 128 #ifdef is68k
 129 #define SEGMENT_SIZE 0x20000
 130 #endif
 131 #if defined(m68k) && defined(PORTAR)
 132 #define PAGE_SIZE 0x400
 133 #define SEGMENT_SIZE PAGE_SIZE
 134 #endif
 135 
 136 #ifdef linux
 137 #define PAGE_SIZE       4096
 138 #define SEGMENT_SIZE    1024
 139 #endif
 140 
 141 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
 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 
 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 
 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__ */
/* */
root/include/linux/a.out.h

INCLUDED FROM
