text: /*** coff information for Apollo M68K */
  
  /********************** FILE HEADER **********************/
  
  struct external_filehdr {
  	char f_magic[2];	/* magic number			*/
  	char f_nscns[2];	/* number of sections		*/
  	char f_timdat[4];	/* time & date stamp		*/
  	char f_symptr[4];	/* file pointer to symtab	*/
  	char f_nsyms[4];	/* number of symtab entries	*/
  	char f_opthdr[2];	/* sizeof(optional hdr)		*/
  	char f_flags[2];	/* flags			*/
  };
  
  
  /* Motorola 68000/68008/68010/68020 */
  #define	MC68MAGIC	0520
  #define MC68KWRMAGIC	0520	/* writeable text segments */
  #define	MC68TVMAGIC	0521
  #define MC68KROMAGIC	0521	/* readonly shareable text segments */
  #define MC68KPGMAGIC	0522	/* demand paged text segments */
  #define	M68MAGIC	0210
  #define	M68TVMAGIC	0211
  
  /* Apollo 68000-based machines have a different magic number. This comes
   * from /usr/include/apollo/filehdr.h
   */
  #define APOLLOM68KMAGIC 0627
  
  #define OMAGIC M68MAGIC
  #define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
    ((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC)  && \
    ((x).f_magic!=APOLLOM68KMAGIC) )
  
  
  #define	FILHDR	struct external_filehdr
  #define	FILHSZ	sizeof(FILHDR)
  
  
  /********************** AOUT "OPTIONAL HEADER" **********************/
  
  typedef struct 
  {
    char 	magic[2];		/* type of file				*/
    char	vstamp[2];		/* version stamp			*/
    char	tsize[4];		/* text size in bytes, padded to FW bdry*/
    char	dsize[4];		/* initialized data "  "		*/
    char	bsize[4];		/* uninitialized data "   "		*/
    char	entry[4];		/* entry pt.				*/
    char 	text_start[4];		/* base of text used for this file */
    char 	data_start[4];		/* base of data used for this file */
    char	o_sri[4];		/* Apollo specific - .sri data pointer */
    char  o_inlib[4];		/* Apollo specific - .inlib data pointer */
    char	vid[8];			/* Apollo specific - 64 bit version ID */
  }
  AOUTHDR;
  
  #define	APOLLO_COFF_VERSION_NUMBER 1 /* the value of the aouthdr magic */
  #define	AOUTHDRSZ (sizeof(AOUTHDR))
  #define AOUTSZ (sizeof(AOUTHDR))
  
  
  
  /********************** SECTION HEADER **********************/
  
  struct external_scnhdr {
  	/* Apollo allow for larger section names by  allowing it to be in
  	 * the string table.
  	 */
  	char		s_name[8];
  	char		s_paddr[4];	/* physical address, aliased s_nlib */
  	char		s_vaddr[4];	/* virtual address		*/
  	char		s_size[4];	/* section size			*/
  	char		s_scnptr[4];	/* file ptr to raw data for section */
  	char		s_relptr[4];	/* file ptr to relocation	*/
  	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
  	char		s_nreloc[2];	/* number of relocation entries	*/
  	char		s_nlnno[2];	/* number of line number entries*/
  	char		s_flags[4];	/* flags			*/
  };
  
  /* If s_zeores is all zeroes, s_offset gives the real location of the name
   * in the string table.
   */
  
  #define	s_zeroes section_name.s_name
  #define	s_offset (section_name.s_name+4)
  
  /*
   * names of "special" sections
   */
  #define _TEXT	".text"
  #define _DATA	".data"
  #define _BSS	".bss"
  #define _TV	".tv"
  #define _INIT	".init"
  #define _FINI	".fini"
  #define	_LINES	".lines"
  #define	_BLOCKS	".blocks"
  #define _SRI    ".sri"                  /* Static Resource Information (systype,
   et al.) */
  #define _MIR    ".mir"                  /* Module Information Records  */
  #define _APTV   ".aptv"                 /* Apollo-style transfer vectors. */
  #define _INLIB  ".inlib"                /* Shared Library information */
  #define _RWDI   ".rwdi"         /* Read/write data initialization directives for
   compressed sections */
  #define _UNWIND ".unwind"               /* Stack unwind information */
  
  #define	SCNHDR	struct external_scnhdr
  #define	SCNHSZ	sizeof(SCNHDR)
  
  
  /********************** LINE NUMBERS **********************/
  
  /* 1 line number entry for every "breakpointable" source line in a section.
   * Line numbers are grouped on a per function basis; first entry in a function
   * grouping will have l_lnno = 0 and in place of physical address will be the
   * symbol table index of the function name.
   */
  struct external_lineno {
  	union {
  		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
  		char l_paddr[4];	/* (physical) address of line number	*/
  	} l_addr;
  	char l_lnno[2];	/* line number		*/
  };
  
  
  #define	LINENO	struct external_lineno
  #define	LINESZ	sizeof(LINENO) 
  
  
  /********************** SYMBOLS **********************/
  
  #define E_SYMNMLEN	8	/* # characters in a symbol name	*/
  #define E_FILNMLEN	14	/* # characters in a file name		*/
  #define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
  
  struct external_syment 
  {
    union {
      char e_name[E_SYMNMLEN];
      struct {
        char e_zeroes[4];
        char e_offset[4];
      } e;
    } e;
    char e_value[4];
    char e_scnum[2];
    char e_type[2];
    char e_sclass[1];
    char e_numaux[1];
  };
  
  
  
  #define N_BTMASK	(017)
  #define N_TMASK		(060)
  #define N_BTSHFT	(4)
  #define N_TSHIFT	(2)
    
  
  union external_auxent {
  	struct {
  		char x_tagndx[4];	/* str, un, or enum tag indx */
  		union {
  			struct {
  			    char  x_lnno[2]; /* declaration line number */
  			    char  x_size[2]; /* str/union/array size */
  			} x_lnsz;
  			char x_fsize[4];	/* size of function */
  		} x_misc;
  		union {
  			struct {		/* if ISFCN, tag, or .bb */
  			    char x_lnnoptr[4];	/* ptr to fcn line # */
  			    char x_endndx[4];	/* entry ndx past block end */
  			} x_fcn;
  			struct {		/* if ISARY, up to 4 dimen. */
  			    char x_dimen[E_DIMNUM][2];
  			} x_ary;
  		} x_fcnary;
  		char x_tvndx[2];		/* tv index */
  	} x_sym;
  
  	union {
  		char x_fname[E_FILNMLEN];
  		struct {
  			char x_zeroes[4];
  			char x_offset[4];
  		} x_n;
  	} x_file;
  
  	struct {
  		char x_scnlen[4];			/* section length */
  		char x_nreloc[2];	/* # relocation entries */
  		char x_nlinno[2];	/* # line numbers */
  	} x_scn;
  
          struct {
  		char x_tvfill[4];	/* tv fill value */
  		char x_tvlen[2];	/* length of .tv */
  		char x_tvran[2][2];	/* tv range */
  	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
  
  
  };
  
  #define	SYMENT	struct external_syment
  #define	SYMESZ	18	
  #define	AUXENT	union external_auxent
  #define	AUXESZ	18
  
  
  
  /********************** RELOCATION DIRECTIVES **********************/
  
  
  struct external_reloc {
    char r_vaddr[4];
    char r_symndx[4];
    char r_type[2];
  #ifdef M68K_COFF_OFFSET
    char r_offset[4];
  #endif
  
  };
  
  
  #define RELOC struct external_reloc
  
  #define RELSZ sizeof(struct external_reloc)
  
  #define DEFAULT_DATA_SECTION_ALIGNMENT 4
  #define DEFAULT_BSS_SECTION_ALIGNMENT 4
  #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
  /* For new sections we havn't heard of before */
  #define DEFAULT_SECTION_ALIGNMENT 4
  
  /* Apollo specific STYP flags */
  
  #define STYP_RELOCATED_NOT_LOADED 0x00010000	/* Section is relocated normally during linking, but need
                                              	   not be loaded during program execution */
  #define STYP_DEBUG              0x00020000	/* debug section */
  #define STYP_OVERLAY		0x00040000	/* Section is overlayed */
  #define STYP_INSTRUCTION    	0x00200000	/* Section contains executable code */
  
  #define STYP_ZERO		0x00800000	/* Section is initialized to zero */
  #define STYP_INSTALLED		0x02000000	/* Section should be installable in KGT */
  #define STYP_LOOK_INSTALLED	0x04000000	/* Look for section in KGT */
  #define STYP_SECALIGN1		0x08000000	/* Specially aligned section */
  #define STYP_SECALIGN2		0x10000000	/*      "       "       "    */
  #define STYP_COMPRESSED		0x20000000	/* No section data per se (s_scnptr = 0), but there are
  						   initialization directives for it in .rwdi section
  						   (used in conjunction with STYP_BSS) */
  