sysdeps/unix/sysv/linux/a.out.h

   1 #ifndef __A_OUT_GNU_H__
   2 #define __A_OUT_GNU_H__
   3
   4 #include <bits/a.out.h>
   5
   6 #define __GNU_EXEC_MACROS__
   7
   8 struct exec
   9 {
  10   unsigned long a_info; /* Use macros N_MAGIC, etc for access.  */
  11   unsigned int a_text;  /* Length of text, in bytes.  */
  12   unsigned int a_data;  /* Length of data, in bytes.  */
  13   unsigned int a_bss;   /* Length of uninitialized data area for file, in bytes.  */
  14   unsigned int a_syms;  /* Length of symbol table data in file, in bytes.  */
  15   unsigned int a_entry; /* Start address.  */
  16   unsigned int a_trsize;/* Length of relocation info for text, in bytes.  */
  17   unsigned int a_drsize;/* Length of relocation info for data, in bytes.  */
  18 };
  19
  20 enum machine_type
  21 {
  22   M_OLDSUN2 = 0,
  23   M_68010 = 1,
  24   M_68020 = 2,
  25   M_SPARC = 3,
  26   M_386 = 100,
  27   M_MIPS1 = 151,
  28   M_MIPS2 = 152
  29 };
  30
  31 #define N_MAGIC(exec)   ((exec).a_info & 0xffff)
  32 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
  33 #define N_FLAGS(exec)   (((exec).a_info >> 24) & 0xff)
  34 #define N_SET_INFO(exec, magic, type, flags) \
  35   ((exec).a_info = ((magic) & 0xffff)                                   \
  36    | (((int)(type) & 0xff) << 16)                                       \
  37    | (((flags) & 0xff) << 24))
  38 #define N_SET_MAGIC(exec, magic) \
  39   ((exec).a_info = ((exec).a_info & 0xffff0000) | ((magic) & 0xffff))
  40 #define N_SET_MACHTYPE(exec, machtype) \
  41   ((exec).a_info =                                                      \
  42    ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
  43 #define N_SET_FLAGS(exec, flags) \
  44   ((exec).a_info =                                                      \
  45    ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
  46
  47 /* Code indicating object file or impure executable.  */
  48 #define OMAGIC 0407
  49 /* Code indicating pure executable.  */
  50 #define NMAGIC 0410
  51 /* Code indicating demand-paged executable.  */
  52 #define ZMAGIC 0413
  53 /* This indicates a demand-paged executable with the header in the text.
  54    The first page is unmapped to help trap NULL pointer references.  */
  55 #define QMAGIC 0314
  56 /* Code indicating core file.  */
  57 #define CMAGIC 0421
  58
  59 #define N_TRSIZE(a)     ((a).a_trsize)
  60 #define N_DRSIZE(a)     ((a).a_drsize)
  61 #define N_SYMSIZE(a)    ((a).a_syms)
  62 #define N_BADMAG(x) \
  63   (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC                         \
  64    && N_MAGIC(x) != ZMAGIC && N_MAGIC(x) != QMAGIC)
  65 #define _N_HDROFF(x)    (1024 - sizeof (struct exec))
  66 #define N_TXTOFF(x) \
  67   (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) :       \
  68    (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
  69 #define N_DATOFF(x)     (N_TXTOFF(x) + (x).a_text)
  70 #define N_TRELOFF(x)    (N_DATOFF(x) + (x).a_data)
  71 #define N_DRELOFF(x)    (N_TRELOFF(x) + N_TRSIZE(x))
  72 #define N_SYMOFF(x)     (N_DRELOFF(x) + N_DRSIZE(x))
  73 #define N_STROFF(x)     (N_SYMOFF(x) + N_SYMSIZE(x))
  74
  75 /* Address of text segment in memory after it is loaded.  */
  76 #define N_TXTADDR(x)    (N_MAGIC(x) == QMAGIC ? 4096 : 0)
  77
  78 /* Address of data segment in memory after it is loaded.  */
  79 #define SEGMENT_SIZE    1024
  80
  81 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
  82 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
  83
  84 #define N_DATADDR(x) \
  85   (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x))                               \
  86    : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
  87 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
  88
  89 #if !defined (N_NLIST_DECLARED)
  90 struct nlist
  91 {
  92   union
  93     {
  94       char *n_name;
  95       struct nlist *n_next;
  96       long n_strx;
  97     } n_un;
  98   unsigned char n_type;
  99   char n_other;
 100   short n_desc;
 101   unsigned long n_value;
 102 };
 103 #endif /* no N_NLIST_DECLARED.  */
 104
 105 #define N_UNDF  0
 106 #define N_ABS   2
 107 #define N_TEXT  4
 108 #define N_DATA  6
 109 #define N_BSS   8
 110 #define N_FN    15
 111 #define N_EXT   1
 112 #define N_TYPE  036
 113 #define N_STAB  0340
 114 #define N_INDR  0xa
 115 #define N_SETA  0x14    /* Absolute set element symbol.  */
 116 #define N_SETT  0x16    /* Text set element symbol.  */
 117 #define N_SETD  0x18    /* Data set element symbol.  */
 118 #define N_SETB  0x1A    /* Bss set element symbol.  */
 119 #define N_SETV  0x1C    /* Pointer to set vector in data area.  */
 120
 121 #if !defined (N_RELOCATION_INFO_DECLARED)
 122 /* This structure describes a single relocation to be performed.
 123    The text-relocation section of the file is a vector of these structures,
 124    all of which apply to the text section.
 125    Likewise, the data-relocation section applies to the data section.  */
 126
 127 struct relocation_info
 128 {
 129   int r_address;
 130   unsigned int r_symbolnum:24;
 131   unsigned int r_pcrel:1;
 132   unsigned int r_length:2;
 133   unsigned int r_extern:1;
 134   unsigned int r_pad:4;
 135 };
 136 #endif /* no N_RELOCATION_INFO_DECLARED.  */
 137
 138 #endif /* __A_OUT_GNU_H__ */