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rel_aout.h

#ifndef _BSD_A_OUT_H
#define _BSD_A_OUT_H

struct      exec {                  /* a.out header */
  unsigned char   a_magic[2]; /* magic number */
  unsigned char   a_flags;    /* flags, see below */
  unsigned char   a_cpu;            /* cpu id */
  unsigned char   a_hdrlen;   /* length of header */
  unsigned char   a_unused;   /* reserved for future use */
  unsigned short a_version;   /* version stamp (not used at present) */
  long            a_text;           /* size of text segement in bytes */
  long            a_data;           /* size of data segment in bytes */
  long            a_bss;            /* size of bss segment in bytes */
  long            a_entry;    /* entry point */
  long            a_total;    /* total memory allocated */
  long            a_syms;           /* size of symbol table */
                        /* SHORT FORM ENDS HERE */

  long            a_trsize;   /* text relocation size */
  long            a_drsize;   /* data relocation size */
  long            a_tbase;    /* text relocation base */
  long            a_dbase;    /* data relocation base */
};

#define A_MAGIC0  ((unsigned char) 0x01)
#define A_MAGIC1  ((unsigned char) 0x03)
#define BADMAG(X)    ((X).a_magic[0] != A_MAGIC0 || (X).a_magic[1] != A_MAGIC1)

/* CPU Id of TARGET machine (byte order coded in low order two bits) */
#define A_NONE    0x00  /* unknown */
#define A_I8086   0x04  /* intel i8086/8088 */
#define A_M68K    0x0B  /* motorola m68000 */
#define A_NS16K   0x0C  /* national semiconductor 16032 */
#define A_I80386 0x10   /* intel i80386 */
#define A_SPARC   0x17  /* Sun SPARC */

#define A_BLR(cputype)  ((cputype&0x01)!=0) /* TRUE if bytes left-to-right */
#define A_WLR(cputype)  ((cputype&0x02)!=0) /* TRUE if words left-to-right */

/* Flags. */
#define A_UZP     0x01  /* unmapped zero page (pages) */
#define A_EXEC    0x10  /* executable */
#define A_SEP     0x20  /* separate I/D */
#define A_PURE    0x40  /* pure text */         /* not used */
#define A_TOVLY   0x80  /* text overlay */      /* not used */

/* Tell a.out.gnu.h not to define `struct exec'.  */
#define __STRUCT_EXEC_OVERRIDE__

/* Hide M_386 from enum declaration in a.out.h. */
#define M_386 HIDE_M_386

#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__

#if defined(sequent) && defined(i386)
#define a_magic a_info
#include <a.out.h>
#undef a_magic
#define __STRUCT_EXEC_OVERRIDE__
#define N_NLIST_DECLARED
#define N_RELOCATION_INFO_DECLARED
#endif

#define __GNU_EXEC_MACROS__

#ifndef __STRUCT_EXEC_OVERRIDE__

struct exec
{
  unsigned long a_info;       /* Use macros N_MAGIC, etc for access */
  unsigned long a_text;       /* length of text, in bytes */
  unsigned long a_data;       /* length of data, in bytes */
  unsigned long a_bss;        /* length of uninitialized data area for file, in bytes */
  unsigned long a_syms;       /* length of symbol table data in file, in bytes */
  unsigned long a_entry;      /* start address */
  unsigned long a_trsize;     /* length of relocation info for text, in bytes */
  unsigned long a_drsize;     /* length of relocation info for data, in bytes */
};

#endif /* __STRUCT_EXEC_OVERRIDE__ */

/* these go in the N_MACHTYPE field */
enum machine_type {
#if defined (M_OLDSUN2)
  M__OLDSUN2 = M_OLDSUN2,
#else
  M_OLDSUN2 = 0,
#endif
#if defined (M_68010)
  M__68010 = M_68010,
#else
  M_68010 = 1,
#endif
#if defined (M_68020)
  M__68020 = M_68020,
#else
  M_68020 = 2,
#endif
#if defined (M_SPARC)
  M__SPARC = M_SPARC,
#else
  M_SPARC = 3,
#endif
  /* skip a bunch so we don't run into any of sun's numbers */
  M_386 = 100,
};

#if !defined (N_MAGIC)
#define N_MAGIC(exec) ((exec).a_info & 0xffff)
#endif
#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
#define N_SET_INFO(exec, magic, type, flags) \
      ((exec).a_info = ((magic) & 0xffff) \
       | (((int)(type) & 0xff) << 16) \
       | (((flags) & 0xff) << 24))
#define N_SET_MAGIC(exec, magic) \
      ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))

#define N_SET_MACHTYPE(exec, machtype) \
      ((exec).a_info = \
       ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))

#define N_SET_FLAGS(exec, flags) \
      ((exec).a_info = \
       ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))

#ifndef OMAGIC
/* Code indicating object file or impure executable.  */
#define OMAGIC 0407
/* Code indicating pure executable.  */
#define NMAGIC 0410
/* Code indicating demand-paged executable.  */
#define ZMAGIC 0413
#endif /* not OMAGIC */

#if !defined (N_BADMAG)
#define N_BADMAG(x)                             \
 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC        \
  && N_MAGIC(x) != ZMAGIC)
#endif

#define _N_BADMAG(x)                            \
 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC        \
  && N_MAGIC(x) != ZMAGIC)

#define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec))

#if !defined (N_TXTOFF)
#define N_TXTOFF(x) \
 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
#endif

#if !defined (N_DATOFF)
#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
#endif

#if !defined (N_TRELOFF)
#define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
#endif

#if !defined (N_DRELOFF)
#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
#endif

#if !defined (N_SYMOFF)
#define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
#endif

#if !defined (N_STROFF)
#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
#endif

/* Address of text segment in memory after it is loaded.  */
#if !defined (N_TXTADDR)
#define N_TXTADDR(x) 0
#endif

/* Address of data segment in memory after it is loaded.
   Note that it is up to you to define SEGMENT_SIZE
   on machines not listed here.  */
#if defined(vax) || defined(hp300) || defined(pyr)
#define SEGMENT_SIZE PAGE_SIZE
#endif
#ifdef      hp300
#define     PAGE_SIZE   4096
#endif
#ifdef      sony
#define     SEGMENT_SIZE      0x2000
#endif      /* Sony.  */
#ifdef is68k
#define SEGMENT_SIZE 0x20000
#endif
#if defined(m68k) && defined(PORTAR)
#define PAGE_SIZE 0x400
#define SEGMENT_SIZE PAGE_SIZE
#endif

#define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))

#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)

#ifndef N_DATADDR
#define N_DATADDR(x) \
    (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
     : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
#endif

/* Address of bss segment in memory after it is loaded.  */
#if !defined (N_BSSADDR)
#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
#endif

#if !defined (N_NLIST_DECLARED)
struct nlist {
  union {
    char *n_name;
    struct nlist *n_next;
    long n_strx;
  } n_un;
  unsigned char n_type;
  char n_other;
  short n_desc;
  unsigned long n_value;
};
#endif /* no N_NLIST_DECLARED.  */

#if !defined (N_UNDF)
#define N_UNDF 0
#endif
#if !defined (N_ABS)
#define N_ABS 2
#endif
#if !defined (N_TEXT)
#define N_TEXT 4
#endif
#if !defined (N_DATA)
#define N_DATA 6
#endif
#if !defined (N_BSS)
#define N_BSS 8
#endif
#if !defined (N_COMM)
#define N_COMM 18
#endif
#if !defined (N_FN)
#define N_FN 15
#endif

#if !defined (N_EXT)
#define N_EXT 1
#endif
#if !defined (N_TYPE)
#define N_TYPE 036
#endif
#if !defined (N_STAB)
#define N_STAB 0340
#endif

/* The following type indicates the definition of a symbol as being
   an indirect reference to another symbol.  The other symbol
   appears as an undefined reference, immediately following this symbol.

   Indirection is asymmetrical.  The other symbol's value will be used
   to satisfy requests for the indirect symbol, but not vice versa.
   If the other symbol does not have a definition, libraries will
   be searched to find a definition.  */
#define N_INDR 0xa

/* The following symbols refer to set elements.
   All the N_SET[ATDB] symbols with the same name form one set.
   Space is allocated for the set in the text section, and each set
   element's value is stored into one word of the space.
   The first word of the space is the length of the set (number of elements).

   The address of the set is made into an N_SETV symbol
   whose name is the same as the name of the set.
   This symbol acts like a N_DATA global symbol
   in that it can satisfy undefined external references.  */

/* These appear as input to LD, in a .o file.  */
#define     N_SETA      0x14        /* Absolute set element symbol */
#define     N_SETT      0x16        /* Text set element symbol */
#define     N_SETD      0x18        /* Data set element symbol */
#define     N_SETB      0x1A        /* Bss set element symbol */

/* This is output from LD.  */
#define N_SETV    0x1C        /* Pointer to set vector in data area.  */

#if !defined (N_RELOCATION_INFO_DECLARED)
/* This structure describes a single relocation to be performed.
   The text-relocation section of the file is a vector of these structures,
   all of which apply to the text section.
   Likewise, the data-relocation section applies to the data section.  */

struct relocation_info
{
  /* Address (within segment) to be relocated.  */
  unsigned long r_address;
#if 0
  /* The meaning of r_symbolnum depends on r_extern.  */
  unsigned int r_symbolnum:24;
  /* Nonzero means value is a pc-relative offset
     and it should be relocated for changes in its own address
     as well as for changes in the symbol or section specified.  */
  unsigned int r_pcrel:1;
  /* Length (as exponent of 2) of the field to be relocated.
     Thus, a value of 2 indicates 1<<2 bytes.  */
  unsigned int r_length:2;
  /* 1 => relocate with value of symbol.
          r_symbolnum is the index of the symbol
        in file's the symbol table.
     0 => relocate with the address of a segment.
          r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
        (the N_EXT bit may be set also, but signifies nothing).  */
  unsigned int r_extern:1;
  /* Four bits that aren't used, but when writing an object file
     it is desirable to clear them.  */
  unsigned int r_pad:4;
#else
  unsigned long foo;
#endif
};
#endif /* no N_RELOCATION_INFO_DECLARED.  */


#endif /* __A_OUT_GNU_H__ */

#undef M_386
#define M_386 A_I80386

#undef N_MAGIC
#define N_MAGIC3(magic0, magic1, type) \
      ((magic0) | ((magic1) << 8) | ((type) << 16))
#define N_MAGIC(exec) \
      N_MAGIC3((exec).a_magic[0], (exec).a_magic[1], (exec).a_flags)
      
#undef N_MACHTYPE
#define N_MACHTYPE(exec) ((enum machine_type)((exec).a_cpu))

#undef N_FLAGS
#define N_FLAGS(exec) 0

#undef N_SET_INFO
#define N_SET_INFO(exec, magic, type, flags) \
      ((exec).a_magic[0] = (magic) & 0xff, \
       (exec).a_magic[1] = ((magic) >> 8) & 0xff, \
       (exec).a_flags = ((magic) >> 16) & 0xff, \
       (exec).a_cpu = (type) & 0xff)
       
#undef N_SET_MAGIC
#define N_SET_MAGIC(exec, magic) \
      ((exec).a_magic[0] = (magic) & 0xff, \
       (exec).a_magic[1] = ((magic) >> 8) & 0xff, \
       (exec).a_flags = ((magic) >> 16) & 0xff)

#undef N_SET_MACHTYPE
#define N_SET_MACHTYPE(exec, machtype) \
      ((exec).a_cpu = (machtype) & 0xff, \
       (exec).a_hdrlen = sizeof (exec))

#undef N_SET_FLAGS
#define N_SET_FLAGS(exec, flags) /* nothing */

#undef OMAGIC
#define OMAGIC N_MAGIC3(A_MAGIC0, A_MAGIC1, 0)

#undef NMAGIC
#define NMAGIC N_MAGIC3(A_MAGIC0, A_MAGIC1, A_EXEC)

#undef ZMAGIC
#define ZMAGIC N_MAGIC3(A_MAGIC0, A_MAGIC1, A_EXEC)

#undef _N_HDROFF
#define _N_HDROFF(x) 0

#undef PAGE_SIZE
#define PAGE_SIZE 16
#define SEGMENT_SIZE PAGE_SIZE
#define getpagesize() PAGE_SIZE

#endif /* _BSD_A_OUT_H */

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