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        long    entrypt;        /* entry pt.                            */
        long    text_start;     /* base of text used for this file      */
        long    data_start;     /* base of data used for this file      */
} AOUTHDR;

#define AOUTSZ  sizeof(AOUTHDR)

/*----------------------------------------------------------------------*/
/*      When a UNIX aout header is to be built in the optional header,  */
/*      the following magic numbers can appear in that header:          */ 
/*                                                                      */
/*              AOUT1MAGIC : default : readonly sharable text segment   */
/*              AOUT2MAGIC:          : writable text segment            */
/*              PAGEMAGIC  :         : configured for paging            */
/*----------------------------------------------------------------------*/
#define AOUT1MAGIC 0410
#define AOUT2MAGIC 0407
#define PAGEMAGIC  0413


/*------------------------------------------------------------------------*/
/*  COMMON ARCHIVE FILE STRUCTURES                                        */
/*                                                                        */
/*       ARCHIVE File Organization:                                       */
/*       _______________________________________________                  */
/*       |__________ARCHIVE_MAGIC_STRING_______________|                  */
/*       |__________ARCHIVE_FILE_MEMBER_1______________|                  */
/*       |                                             |                  */
/*       |       Archive File Header "ar_hdr"          |                  */
/*       |.............................................|                  */
/*       |       Member Contents                       |                  */
/*       |               1. External symbol directory  |                  */
/*       |               2. Text file                  |                  */
/*       |_____________________________________________|                  */
/*       |________ARCHIVE_FILE_MEMBER_2________________|                  */
/*       |               "ar_hdr"                      |                  */
/*       |.............................................|                  */
/*       |       Member Contents (.o or text file)     |                  */
/*       |_____________________________________________|                  */
/*       |       .               .               .     |                  */
/*       |       .               .               .     |                  */
/*       |       .               .               .     |                  */
/*       |_____________________________________________|                  */
/*       |________ARCHIVE_FILE_MEMBER_n________________|                  */
/*       |               "ar_hdr"                      |                  */
/*       |.............................................|                  */
/*       |               Member Contents               |                  */
/*       |_____________________________________________|                  */
/*                                                                        */
/*------------------------------------------------------------------------*/

#define COFF_ARMAG   "!<arch>\n"
#define SARMAG  8
#define ARFMAG  "`\n"

struct ar_hdr           /* archive file member header - printable ascii */
{
        char    ar_name[16];    /* file member name - `/' terminated */
        char    ar_date[12];    /* file member date - decimal */
        char    ar_uid[6];      /* file member user id - decimal */
        char    ar_gid[6];      /* file member group id - decimal */
        char    ar_mode[8];     /* file member mode - octal */
        char    ar_size[10];    /* file member size - decimal */
        char    ar_fmag[2];     /* ARFMAG - string to end header */
};


/*------------------------------------------------------------------------*/
/*  SECTION HEADER                                                        */
/*------------------------------------------------------------------------*/
struct scnhdr {
        char            s_name[8];      /* section name */
        long            s_paddr;        /* physical address */
        long            s_vaddr;        /* virtual address */
        long            s_size;         /* section size */
        long            s_scnptr;       /* file ptr to raw data for section */
        long            s_relptr;       /* file ptr to relocation */
        long            s_lnnoptr;      /* file ptr to line numbers */
        unsigned int	s_nreloc;       /* number of relocation entries */
        unsigned int	s_nlnno;        /* number of line number entries */
        unsigned int	s_flags;        /* flags */
		unsigned short	s_reserved;     /* reserved byte */
		unsigned short  s_page;         /* memory page id */
        };

#define SCNHDR  struct scnhdr
#define SCNHSZ  sizeof(SCNHDR)

/*------------------------------------------------------------------------*/
/* Define constants for names of "special" sections                       */
/*------------------------------------------------------------------------*/
/* #define _TEXT    ".text" */
#define _DATA    ".data"
#define _BSS     ".bss"
#define _CINIT   ".cinit"
#define _TV      ".tv"

/*------------------------------------------------------------------------*/
/* The low 4 bits of s_flags is used as a section "type"                  */
/*------------------------------------------------------------------------*/
#define STYP_REG    0x00  /* "regular" : allocated, relocated, loaded */
#define STYP_DSECT  0x01  /* "dummy"   : not allocated, relocated, not loaded */
#define STYP_NOLOAD 0x02  /* "noload"  : allocated, relocated, not loaded */
#define STYP_GROUP  0x04  /* "grouped" : formed of input sections */
#define STYP_PAD    0x08  /* "padding" : not allocated, not relocated, loaded */
#define STYP_COPY   0x10  /* "copy"    : used for C init tables - 
                                                not allocated, relocated,
                                                loaded;  reloc & lineno
                                                entries processed normally */
#define STYP_TEXT   0x20   /* section contains text only */
#define STYP_DATA   0x40   /* section contains data only */
#define STYP_BSS    0x80   /* section contains bss only */

#define STYP_ALIGN  0x100  /* align flag passed by old version assemblers */
#define ALIGN_MASK  0x0F00 /* part of s_flags that is used for align vals */
#define ALIGNSIZE(x) (1 << ((x & ALIGN_MASK) >> 8))


/*------------------------------------------------------------------------*/
/*  RELOCATION ENTRIES                                                    */
/*------------------------------------------------------------------------*/