root/include/a.out.h

/* [previous][next][first][last][top][bottom][index][help] */

INCLUDED FROM


   1 #ifndef _A_OUT_H
   2 #define _A_OUT_H
   3 
   4 #define __GNU_EXEC_MACROS__
   5 
   6 struct exec {
   7   unsigned long a_magic;        /* Use macros N_MAGIC, etc for access */
   8   unsigned a_text;              /* length of text, in bytes */
   9   unsigned a_data;              /* length of data, in bytes */
  10   unsigned a_bss;               /* length of uninitialized data area for file, in bytes */
  11   unsigned a_syms;              /* length of symbol table data in file, in bytes */
  12   unsigned a_entry;             /* start address */
  13   unsigned a_trsize;            /* length of relocation info for text, in bytes */
  14   unsigned a_drsize;            /* length of relocation info for data, in bytes */
  15 };
  16 
  17 #ifndef N_MAGIC
  18 #define N_MAGIC(exec) ((exec).a_magic)
  19 #endif
  20 
  21 #ifndef OMAGIC
  22 /* Code indicating object file or impure executable.  */
  23 #define OMAGIC 0407
  24 /* Code indicating pure executable.  */
  25 #define NMAGIC 0410
  26 /* Code indicating demand-paged executable.  */
  27 #define ZMAGIC 0413
  28 #endif /* not OMAGIC */
  29 
  30 #ifndef N_BADMAG
  31 #define N_BADMAG(x)                                     \
  32  (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC          \
  33   && N_MAGIC(x) != ZMAGIC)
  34 #endif
  35 
  36 #define _N_BADMAG(x)                                    \
  37  (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC          \
  38   && N_MAGIC(x) != ZMAGIC)
  39 
  40 #define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec))
  41 
  42 #ifndef N_TXTOFF
  43 #define N_TXTOFF(x) \
  44  (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
  45 #endif
  46 
  47 #ifndef N_DATOFF
  48 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
  49 #endif
  50 
  51 #ifndef N_TRELOFF
  52 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
  53 #endif
  54 
  55 #ifndef N_DRELOFF
  56 #define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
  57 #endif
  58 
  59 #ifndef N_SYMOFF
  60 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
  61 #endif
  62 
  63 #ifndef N_STROFF
  64 #define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
  65 #endif
  66 
  67 /* Address of text segment in memory after it is loaded.  */
  68 #ifndef N_TXTADDR
  69 #define N_TXTADDR(x) 0
  70 #endif
  71 
  72 /* Address of data segment in memory after it is loaded.
  73    Note that it is up to you to define SEGMENT_SIZE
  74    on machines not listed here.  */
  75 #if defined(vax) || defined(hp300) || defined(pyr)
  76 #define SEGMENT_SIZE PAGE_SIZE
  77 #endif
  78 #ifdef  hp300
  79 #define PAGE_SIZE       4096
  80 #endif
  81 #ifdef  sony
  82 #define SEGMENT_SIZE    0x2000
  83 #endif  /* Sony.  */
  84 #ifdef is68k
  85 #define SEGMENT_SIZE 0x20000
  86 #endif
  87 #if defined(m68k) && defined(PORTAR)
  88 #define PAGE_SIZE 0x400
  89 #define SEGMENT_SIZE PAGE_SIZE
  90 #endif
  91 
  92 #define PAGE_SIZE 4096
  93 #define SEGMENT_SIZE 1024
  94 
  95 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
  96 
  97 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
  98 
  99 #ifndef N_DATADDR
 100 #define N_DATADDR(x) \
 101     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
 102      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
 103 #endif
 104 
 105 /* Address of bss segment in memory after it is loaded.  */
 106 #ifndef N_BSSADDR
 107 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
 108 #endif
 109 
 110 #ifndef N_NLIST_DECLARED
 111 struct nlist {
 112   union {
 113     char *n_name;
 114     struct nlist *n_next;
 115     long n_strx;
 116   } n_un;
 117   unsigned char n_type;
 118   char n_other;
 119   short n_desc;
 120   unsigned long n_value;
 121 };
 122 #endif
 123 
 124 #ifndef N_UNDF
 125 #define N_UNDF 0
 126 #endif
 127 #ifndef N_ABS
 128 #define N_ABS 2
 129 #endif
 130 #ifndef N_TEXT
 131 #define N_TEXT 4
 132 #endif
 133 #ifndef N_DATA
 134 #define N_DATA 6
 135 #endif
 136 #ifndef N_BSS
 137 #define N_BSS 8
 138 #endif
 139 #ifndef N_COMM
 140 #define N_COMM 18
 141 #endif
 142 #ifndef N_FN
 143 #define N_FN 15
 144 #endif
 145 
 146 #ifndef N_EXT
 147 #define N_EXT 1
 148 #endif
 149 #ifndef N_TYPE
 150 #define N_TYPE 036
 151 #endif
 152 #ifndef N_STAB
 153 #define N_STAB 0340
 154 #endif
 155 
 156 /* The following type indicates the definition of a symbol as being
 157    an indirect reference to another symbol.  The other symbol
 158    appears as an undefined reference, immediately following this symbol.
 159 
 160    Indirection is asymmetrical.  The other symbol's value will be used
 161    to satisfy requests for the indirect symbol, but not vice versa.
 162    If the other symbol does not have a definition, libraries will
 163    be searched to find a definition.  */
 164 #define N_INDR 0xa
 165 
 166 /* The following symbols refer to set elements.
 167    All the N_SET[ATDB] symbols with the same name form one set.
 168    Space is allocated for the set in the text section, and each set
 169    element's value is stored into one word of the space.
 170    The first word of the space is the length of the set (number of elements).
 171 
 172    The address of the set is made into an N_SETV symbol
 173    whose name is the same as the name of the set.
 174    This symbol acts like a N_DATA global symbol
 175    in that it can satisfy undefined external references.  */
 176 
 177 /* These appear as input to LD, in a .o file.  */
 178 #define N_SETA  0x14            /* Absolute set element symbol */
 179 #define N_SETT  0x16            /* Text set element symbol */
 180 #define N_SETD  0x18            /* Data set element symbol */
 181 #define N_SETB  0x1A            /* Bss set element symbol */
 182 
 183 /* This is output from LD.  */
 184 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 185 
 186 #ifndef N_RELOCATION_INFO_DECLARED
 187 
 188 /* This structure describes a single relocation to be performed.
 189    The text-relocation section of the file is a vector of these structures,
 190    all of which apply to the text section.
 191    Likewise, the data-relocation section applies to the data section.  */
 192 
 193 struct relocation_info
 194 {
 195   /* Address (within segment) to be relocated.  */
 196   int r_address;
 197   /* The meaning of r_symbolnum depends on r_extern.  */
 198   unsigned int r_symbolnum:24;
 199   /* Nonzero means value is a pc-relative offset
 200      and it should be relocated for changes in its own address
 201      as well as for changes in the symbol or section specified.  */
 202   unsigned int r_pcrel:1;
 203   /* Length (as exponent of 2) of the field to be relocated.
 204      Thus, a value of 2 indicates 1<<2 bytes.  */
 205   unsigned int r_length:2;
 206   /* 1 => relocate with value of symbol.
 207           r_symbolnum is the index of the symbol
 208           in file's the symbol table.
 209      0 => relocate with the address of a segment.
 210           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 211           (the N_EXT bit may be set also, but signifies nothing).  */
 212   unsigned int r_extern:1;
 213   /* Four bits that aren't used, but when writing an object file
 214      it is desirable to clear them.  */
 215   unsigned int r_pad:4;
 216 };
 217 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 218 
 219 
 220 #endif /* __A_OUT_GNU_H__ */

/* [previous][next][first][last][top][bottom][index][help] */