Initial revision

3 files changed, 822 insertions, 0 deletions

diff --git a/include/coff/a29k.h b/include/coff/a29k.h
new file mode 100644
index 0000000..8042d51
--- /dev/null
+++ b/include/coff/a29k.h
@@ -0,0 +1,305 @@
+/* COFF spec for AMD 290*0 
+   Contributed by David Wood @ New York University.
+ */
+ 
+#ifndef AMD
+# define AMD
+#endif
+
+/****************************************************************/
+
+/*
+** File Header and related definitions
+*/
+
+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			*/
+};
+
+#define FILHDR  struct external_filehdr
+#define FILHSZ	sizeof (FILHDR)
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** Magic numbers for Am29000 
+**	(AT&T will assign the "real" magic number)  
+*/
+
+#define SIPFBOMAGIC     0572    /* Am29000 (Byte 0 is MSB) */
+#define SIPRBOMAGIC     0573    /* Am29000 (Byte 0 is LSB) */
+
+
+#define A29K_MAGIC_BIG 		SIPFBOMAGIC	
+#define A29K_MAGIC_LITTLE	SIPRBOMAGIC	
+#define A29KBADMAG(x) 	(((x).f_magic!=A29K_MAGIC_BIG) && \
+			  ((x).f_magic!=A29K_MAGIC_LITTLE))
+
+#define OMAGIC A29K_MAGIC_BIG
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** File header flags currently known to us.
+**
+** Am29000 will use the F_AR32WR and F_AR32W flags to indicate
+** the byte ordering in the file.
+*/
+
+/*--------------------------------------------------------------*/
+
+/*
+** Optional (a.out) header 
+*/
+
+typedef	struct external_aouthdr 
+{
+  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 */
+} AOUTHDR;
+
+#define AOUTSZ (sizeof(AOUTHDR))
+#define AOUTHDRSZ (sizeof(AOUTHDR))
+
+/* aouthdr magic numbers */
+#define NMAGIC		0410	/* separate i/d executable */
+#define SHMAGIC	0406		/* NYU/Ultra3 shared data executable 
+				   (writable text) */
+
+#define _ETEXT   	"_etext"
+
+/*--------------------------------------------------------------*/
+
+/*
+** Section header and related definitions
+*/
+
+struct external_scnhdr 
+{
+	char	    s_name[8];      /* section name		 */
+	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			*/
+};
+
+#define	SCNHDR	struct	external_scnhdr
+#define	SCNHSZ	sizeof	(SCNHDR)
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT   ".text"
+#define _DATA   ".data"
+#define _BSS    ".bss"
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** Section types - with additional section type for global 
+** registers which will be relocatable for the Am29000.
+**
+** In instances where it is necessary for a linker to produce an
+** output file which contains text or data not based at virtual
+** address 0, e.g. for a ROM, then the linker should accept
+** address base information as command input and use PAD sections
+** to skip over unused addresses.
+*/
+
+#define	STYP_BSSREG	0x1200	/* Global register area (like STYP_INFO) */
+#define STYP_ENVIR	0x2200	/* Environment (like STYP_INFO) */
+#define STYP_ABS	0x4000	/* Absolute (allocated, not reloc, loaded) */
+#define STYP_LIT	0x8020	/* Literal data (like STYP_TEXT) */
+
+/*--------------------------------------------------------------*/
+
+/*
+** Relocation information declaration and related definitions
+*/
+
+struct external_reloc {
+  char r_vaddr[4];	/* (virtual) address of reference */
+  char r_symndx[4];	/* index into symbol table */
+  char r_type[2];	/* relocation type */
+};
+
+#define	RELOC		struct external_reloc
+#define	RELSZ		10		/* sizeof (RELOC) */ 
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** Relocation types for the Am29000 
+*/
+
+#define	R_ABS		0	/* reference is absolute */
+ 
+#define	R_IREL		030	/* instruction relative (jmp/call) */
+#define	R_IABS		031	/* instruction absolute (jmp/call) */
+#define	R_ILOHALF	032	/* instruction low half  (const)  */
+#define	R_IHIHALF	033	/* instruction high half (consth) part 1 */
+#define	R_IHCONST	034	/* instruction high half (consth) part 2 */
+				/* constant offset of R_IHIHALF relocation */
+#define	R_BYTE		035	/* relocatable byte value */
+#define R_HWORD		036	/* relocatable halfword value */
+#define R_WORD		037	/* relocatable word value */
+
+#define	R_IGLBLRC	040	/* instruction global register RC */
+#define	R_IGLBLRA	041	/* instruction global register RA */
+#define	R_IGLBLRB	042	/* instruction global register RB */
+ 
+/*
+NOTE:
+All the "I" forms refer to 29000 instruction formats.  The linker is 
+expected to know how the numeric information is split and/or aligned
+within the instruction word(s).  R_BYTE works for instructions, too.
+
+If the parameter to a CONSTH instruction is a relocatable type, two 
+relocation records are written.  The first has an r_type of R_IHIHALF 
+(33 octal) and a normal r_vaddr and r_symndx.  The second relocation 
+record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which 
+is redundant), and an r_symndx containing the 32-bit constant offset 
+to the relocation instead of the actual symbol table index.  This 
+second record is always written, even if the constant offset is zero.
+The constant fields of the instruction are set to zero.
+*/
+
+/*--------------------------------------------------------------*/
+
+/*
+** Line number entry declaration and related definitions
+*/
+
+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		6		/* sizeof (LINENO) */
+
+/*--------------------------------------------------------------*/
+
+/*
+** Symbol entry declaration and related definitions
+*/
+
+#define	E_SYMNMLEN	8	/* Number of characters in a symbol name */
+
+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	SYMENT	struct external_syment
+#define	SYMESZ 	sizeof(SYMENT)	
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** Storage class definitions - new classes for global registers.
+*/
+
+#define C_GLBLREG	19		/* global register */
+#define C_EXTREG	20		/* external global register */
+#define	C_DEFREG	21		/* ext. def. of global register */
+
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
+
+/*
+** Derived symbol mask/shifts.
+*/
+
+#define N_BTMASK	(0xf)
+#define N_BTSHFT	(4)
+#define N_TMASK		(0x30)
+#define N_TSHIFT	(2)
+
+/*--------------------------------------------------------------*/
+
+/*
+** Auxiliary symbol table entry declaration and related 
+** definitions.
+*/
+
+#define E_FILNMLEN	14      /* # characters in a file name	  */
+#define E_DIMNUM  	4       /* # array dimensions in auxiliary entry */
+
+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	AUXENT		union external_auxent
+#define	AUXESZ		18	
diff --git a/include/coff/h8300.h b/include/coff/h8300.h
new file mode 100644
index 0000000..e14d03d
--- /dev/null
+++ b/include/coff/h8300.h
@@ -0,0 +1,201 @@
+/*** coff information for Hitachi H8/300 */
+
+/********************** 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			*/
+};
+
+
+
+#define	H8300MAGIC	0x8300
+
+
+#define H8300BADMAG(x) (((x).f_magic!=H8300MAGIC))
+
+#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 */
+}
+AOUTHDR;
+
+
+#define AOUTHDRSZ (sizeof(AOUTHDR))
+#define AOUTSZ (sizeof(AOUTHDR))
+
+
+
+
+/********************** SECTION HEADER **********************/
+
+
+struct external_scnhdr {
+	char		s_name[8];	/* section name			*/
+	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			*/
+};
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT	".text"
+#define _DATA	".data"
+#define _BSS	".bss"
+
+
+#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 **********************/
+
+/* The external reloc has an offset field, because some of the reloc
+   types on the h8 don't have room in the instruction for the entire
+   offset - eg the strange jump and high page addressing modes */
+
+struct external_reloc {
+  char r_vaddr[4];
+  char r_symndx[4];
+  char r_offset[4];
+  char r_type[2];
+  char r_stuff[2];
+};
+
+
+#define RELOC struct external_reloc
+#define RELSZ 16
+
+#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
diff --git a/include/coff/i386.h b/include/coff/i386.h
new file mode 100644
index 0000000..0683692
--- /dev/null
+++ b/include/coff/i386.h
@@ -0,0 +1,316 @@
+/*** coff information for 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			*/
+};
+
+
+/* Bits for f_flags:
+ *	F_RELFLG	relocation info stripped from file
+ *	F_EXEC		file is executable (no unresolved external references)
+ *	F_LNNO		line numbers stripped from file
+ *	F_LSYMS		local symbols stripped from file
+ *	F_AR32WR	file has byte ordering of an AR32WR machine (e.g. vax)
+ */
+
+#define F_RELFLG	(0x0001)
+#define F_EXEC		(0x0002)
+#define F_LNNO		(0x0004)
+#define F_LSYMS		(0x0008)
+
+
+
+#define	I386MAGIC	0x14c
+#define I386BADMAG(x) (((x).f_magic!=I386MAGIC))
+
+
+#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 */
+}
+AOUTHDR;
+
+#define AOUTSZ (sizeof(AOUTHDR))
+
+
+/********************** STORAGE CLASSES **********************/
+
+#define C_EFCN		-1	/* physical end of function	*/
+#define C_NULL		0
+#define C_AUTO		1	/* automatic variable		*/
+#define C_EXT		2	/* external symbol		*/
+#define C_STAT		3	/* static			*/
+#define C_REG		4	/* register variable		*/
+#define C_EXTDEF	5	/* external definition		*/
+#define C_LABEL		6	/* label			*/
+#define C_ULABEL	7	/* undefined label		*/
+#define C_MOS		8	/* member of structure		*/
+#define C_ARG		9	/* function argument		*/
+#define C_STRTAG	10	/* structure tag		*/
+#define C_MOU		11	/* member of union		*/
+#define C_UNTAG		12	/* union tag			*/
+#define C_TPDEF		13	/* type definition		*/
+#define C_USTATIC	14	/* undefined static		*/
+#define C_ENTAG		15	/* enumeration tag		*/
+#define C_MOE		16	/* member of enumeration	*/
+#define C_REGPARM	17	/* register parameter		*/
+#define C_FIELD		18	/* bit field			*/
+#define C_AUTOARG	19	/* auto argument		*/
+#define C_LASTENT	20	/* dummy entry (end of block)	*/
+#define C_BLOCK		100	/* ".bb" or ".eb"		*/
+#define C_FCN		101	/* ".bf" or ".ef"		*/
+#define C_EOS		102	/* end of structure		*/
+#define C_FILE		103	/* file name			*/
+#define C_LINE		104	/* line # reformatted as symbol table entry */
+#define C_ALIAS	 	105	/* duplicate tag		*/
+#define C_HIDDEN	106	/* ext symbol in dmert public lib */
+
+/********************** SECTION HEADER **********************/
+
+
+struct external_scnhdr {
+	char		s_name[8];	/* section name			*/
+	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			*/
+};
+
+/*
+ * names of "special" sections
+ */
+#define _TEXT	".text"
+#define _DATA	".data"
+#define _BSS	".bss"
+#define _COMMENT ".comment"
+
+/*
+ * s_flags "type"
+ */
+#define STYP_REG	 (0x0000) /* "regular": allocated, relocated, loaded */
+#define STYP_DSECT	 (0x0001) /* "dummy":  relocated only*/
+#define STYP_NOLOAD	 (0x0002) /* "noload": allocated, relocated, not loaded */
+#define STYP_GROUP	 (0x0004) /* "grouped": formed of input sections */
+#define STYP_PAD	 (0x0008) /* "padding": not allocated, not relocated, loaded */
+#define STYP_COPY	 (0x0010) /* "copy": for decision function used by field update;  not allocated, not relocated,
+				     loaded; reloc & lineno entries processed normally */
+#define STYP_TEXT	 (0x0020) /* section contains text only */
+#define S_SHRSEG	 (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
+				     will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
+				     update all process invocations. */
+#define STYP_DATA	 (0x0040) /* section contains data only */
+#define STYP_BSS	 (0x0080) /* section contains bss only */
+#define S_NEWFCN	 (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
+#define STYP_INFO	 (0x0200) /* comment: not allocated not relocated, not loaded */
+#define STYP_OVER	 (0x0400) /* overlay: relocated not allocated or loaded */
+#define STYP_LIB	 (0x0800) /* for .lib: same as INFO */
+#define STYP_MERGE	 (0x2000) /* merge section -- combines with text, data or bss sections only */
+#define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
+				     word of contiguous bytes beginning on a word boundary. */
+
+#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	6
+
+
+/********************** 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_name		_n._n_name
+#define n_ptr		_n._n_nptr[1]
+#define n_zeroes	_n._n_n._n_zeroes
+#define n_offset	_n._n_n._n_offset
+*/
+
+/*
+ * Relocatable symbols have number of the section in which they are defined,
+ * or one of the following:
+ */
+#define N_UNDEF	((short)0)  /* undefined symbol */
+#define N_ABS	((short)-1) /* value of symbol is absolute */
+#define N_DEBUG	((short)-2) /* debugging symbol -- value is meaningless */
+#define N_TV	((short)-3) /* indicates symbol needs preload transfer vector */
+#define P_TV	((short)-4) /* indicates symbol needs postload transfer vector*/
+
+/*
+ * Type of a symbol, in low 4 bits of the word
+ */
+#define T_NULL		0
+#define T_VOID		1	/* function argument (only used by compiler) */
+#define T_CHAR		2	/* character		*/
+#define T_SHORT		3	/* short integer	*/
+#define T_INT		4	/* integer		*/
+#define T_LONG		5	/* long integer		*/
+#define T_FLOAT		6	/* floating point	*/
+#define T_DOUBLE	7	/* double word		*/
+#define T_STRUCT	8	/* structure 		*/
+#define T_UNION		9	/* union 		*/
+#define T_ENUM		10	/* enumeration 		*/
+#define T_MOE		11	/* member of enumeration*/
+#define T_UCHAR		12	/* unsigned character	*/
+#define T_USHORT	13	/* unsigned short	*/
+#define T_UINT		14	/* unsigned integer	*/
+#define T_ULONG		15	/* unsigned long	*/
+#define T_LNGDBL	16	/* long double		*/
+
+/*
+ * derived types, in n_type
+*/
+#define DT_NON		(0)	/* no derived type */
+#define DT_PTR		(1)	/* pointer */
+#define DT_FCN		(2)	/* function */
+#define DT_ARY		(3)	/* array */
+
+#define N_BTMASK	(0xf)
+#define N_TMASK		(0x30)
+#define N_BTSHFT	(4)
+#define N_TSHIFT	(2)
+  
+#define BTYPE(x)	((x) & N_BTMASK)
+
+#define ISPTR(x)	(((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
+#define ISFCN(x)	(((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
+#define ISARY(x)	(((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
+
+#define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
+
+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
+
+
+#	define _ETEXT	"etext"
+
+
+/********************** RELOCATION DIRECTIVES **********************/
+
+
+
+struct external_reloc {
+  char r_vaddr[4];
+  char r_symndx[4];
+  char r_type[2];
+};
+
+
+#define RELOC struct external_reloc
+#define RELSZ 10
+
+#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