include/uapi/linux/a.out.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI__A_OUT_GNU_H__
   3 #define _UAPI__A_OUT_GNU_H__
   4
   5 #define __GNU_EXEC_MACROS__
   6
   7 #ifndef __STRUCT_EXEC_OVERRIDE__
   8
   9 #include <asm/a.out.h>
  10
  11 #endif /* __STRUCT_EXEC_OVERRIDE__ */
  12
  13 #ifndef __ASSEMBLY__
  14
  15 /* these go in the N_MACHTYPE field */
  16 enum machine_type {
  17 #if defined (M_OLDSUN2)
  18   M__OLDSUN2 = M_OLDSUN2,
  19 #else
  20   M_OLDSUN2 = 0,
  21 #endif
  22 #if defined (M_68010)
  23   M__68010 = M_68010,
  24 #else
  25   M_68010 = 1,
  26 #endif
  27 #if defined (M_68020)
  28   M__68020 = M_68020,
  29 #else
  30   M_68020 = 2,
  31 #endif
  32 #if defined (M_SPARC)
  33   M__SPARC = M_SPARC,
  34 #else
  35   M_SPARC = 3,
  36 #endif
  37   /* skip a bunch so we don't run into any of sun's numbers */
  38   M_386 = 100,
  39   M_MIPS1 = 151,        /* MIPS R3000/R3000 binary */
  40   M_MIPS2 = 152         /* MIPS R6000/R4000 binary */
  41 };
  42
  43 #if !defined (N_MAGIC)
  44 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
  45 #endif
  46 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
  47 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
  48 #define N_SET_INFO(exec, magic, type, flags) \
  49         ((exec).a_info = ((magic) & 0xffff) \
  50          | (((int)(type) & 0xff) << 16) \
  51          | (((flags) & 0xff) << 24))
  52 #define N_SET_MAGIC(exec, magic) \
  53         ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
  54
  55 #define N_SET_MACHTYPE(exec, machtype) \
  56         ((exec).a_info = \
  57          ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
  58
  59 #define N_SET_FLAGS(exec, flags) \
  60         ((exec).a_info = \
  61          ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
  62
  63 /* Code indicating object file or impure executable.  */
  64 #define OMAGIC 0407
  65 /* Code indicating pure executable.  */
  66 #define NMAGIC 0410
  67 /* Code indicating demand-paged executable.  */
  68 #define ZMAGIC 0413
  69 /* This indicates a demand-paged executable with the header in the text.
  70    The first page is unmapped to help trap NULL pointer references */
  71 #define QMAGIC 0314
  72
  73 /* Code indicating core file.  */
  74 #define CMAGIC 0421
  75
  76 #if !defined (N_BADMAG)
  77 #define N_BADMAG(x)       (N_MAGIC(x) != OMAGIC         \
  78                         && N_MAGIC(x) != NMAGIC         \
  79                         && N_MAGIC(x) != ZMAGIC \
  80                         && N_MAGIC(x) != QMAGIC)
  81 #endif
  82
  83 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
  84
  85 #if !defined (N_TXTOFF)
  86 #define N_TXTOFF(x) \
  87  (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
  88   (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
  89 #endif
  90
  91 #if !defined (N_DATOFF)
  92 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
  93 #endif
  94
  95 #if !defined (N_TRELOFF)
  96 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
  97 #endif
  98
  99 #if !defined (N_DRELOFF)
 100 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
 101 #endif
 102
 103 #if !defined (N_SYMOFF)
 104 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
 105 #endif
 106
 107 #if !defined (N_STROFF)
 108 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
 109 #endif
 110
 111 /* Address of text segment in memory after it is loaded.  */
 112 #if !defined (N_TXTADDR)
 113 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
 114 #endif
 115
 116 /* Address of data segment in memory after it is loaded. */
 117 #ifndef __KERNEL__
 118 #include <unistd.h>
 119 #endif
 120 #if defined(__i386__) || defined(__mc68000__)
 121 #define SEGMENT_SIZE    1024
 122 #else
 123 #ifndef SEGMENT_SIZE
 124 #ifndef __KERNEL__
 125 #define SEGMENT_SIZE   getpagesize()
 126 #endif
 127 #endif
 128 #endif
 129
 130 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
 131
 132 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
 133
 134 #ifndef N_DATADDR
 135 #define N_DATADDR(x) \
 136     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
 137      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
 138 #endif
 139
 140 /* Address of bss segment in memory after it is loaded.  */
 141 #if !defined (N_BSSADDR)
 142 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
 143 #endif
 144 \f
 145 #if !defined (N_NLIST_DECLARED)
 146 struct nlist {
 147   union {
 148     char *n_name;
 149     struct nlist *n_next;
 150     long n_strx;
 151   } n_un;
 152   unsigned char n_type;
 153   char n_other;
 154   short n_desc;
 155   unsigned long n_value;
 156 };
 157 #endif /* no N_NLIST_DECLARED.  */
 158
 159 #if !defined (N_UNDF)
 160 #define N_UNDF 0
 161 #endif
 162 #if !defined (N_ABS)
 163 #define N_ABS 2
 164 #endif
 165 #if !defined (N_TEXT)
 166 #define N_TEXT 4
 167 #endif
 168 #if !defined (N_DATA)
 169 #define N_DATA 6
 170 #endif
 171 #if !defined (N_BSS)
 172 #define N_BSS 8
 173 #endif
 174 #if !defined (N_FN)
 175 #define N_FN 15
 176 #endif
 177
 178 #if !defined (N_EXT)
 179 #define N_EXT 1
 180 #endif
 181 #if !defined (N_TYPE)
 182 #define N_TYPE 036
 183 #endif
 184 #if !defined (N_STAB)
 185 #define N_STAB 0340
 186 #endif
 187
 188 /* The following type indicates the definition of a symbol as being
 189    an indirect reference to another symbol.  The other symbol
 190    appears as an undefined reference, immediately following this symbol.
 191
 192    Indirection is asymmetrical.  The other symbol's value will be used
 193    to satisfy requests for the indirect symbol, but not vice versa.
 194    If the other symbol does not have a definition, libraries will
 195    be searched to find a definition.  */
 196 #define N_INDR 0xa
 197
 198 /* The following symbols refer to set elements.
 199    All the N_SET[ATDB] symbols with the same name form one set.
 200    Space is allocated for the set in the text section, and each set
 201    element's value is stored into one word of the space.
 202    The first word of the space is the length of the set (number of elements).
 203
 204    The address of the set is made into an N_SETV symbol
 205    whose name is the same as the name of the set.
 206    This symbol acts like a N_DATA global symbol
 207    in that it can satisfy undefined external references.  */
 208
 209 /* These appear as input to LD, in a .o file.  */
 210 #define N_SETA  0x14            /* Absolute set element symbol */
 211 #define N_SETT  0x16            /* Text set element symbol */
 212 #define N_SETD  0x18            /* Data set element symbol */
 213 #define N_SETB  0x1A            /* Bss set element symbol */
 214
 215 /* This is output from LD.  */
 216 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 217 \f
 218 #if !defined (N_RELOCATION_INFO_DECLARED)
 219 /* This structure describes a single relocation to be performed.
 220    The text-relocation section of the file is a vector of these structures,
 221    all of which apply to the text section.
 222    Likewise, the data-relocation section applies to the data section.  */
 223
 224 struct relocation_info
 225 {
 226   /* Address (within segment) to be relocated.  */
 227   int r_address;
 228   /* The meaning of r_symbolnum depends on r_extern.  */
 229   unsigned int r_symbolnum:24;
 230   /* Nonzero means value is a pc-relative offset
 231      and it should be relocated for changes in its own address
 232      as well as for changes in the symbol or section specified.  */
 233   unsigned int r_pcrel:1;
 234   /* Length (as exponent of 2) of the field to be relocated.
 235      Thus, a value of 2 indicates 1<<2 bytes.  */
 236   unsigned int r_length:2;
 237   /* 1 => relocate with value of symbol.
 238           r_symbolnum is the index of the symbol
 239           in file's the symbol table.
 240      0 => relocate with the address of a segment.
 241           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 242           (the N_EXT bit may be set also, but signifies nothing).  */
 243   unsigned int r_extern:1;
 244   /* Four bits that aren't used, but when writing an object file
 245      it is desirable to clear them.  */
 246   unsigned int r_pad:4;
 247 };
 248 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 249
 250 #endif /*__ASSEMBLY__ */
 251 #endif /* _UAPI__A_OUT_GNU_H__ */