/* IBM RS/6000 "XCOFF" file definitions for BFD.
     Copyright (C) 1990, 1991 Free Software Foundation, Inc.
     FIXME: Can someone provide a transliteration of this name into ASCII?
     Using the following chars caused a compiler warning on HIUX (so I replaced
     them with octal escapes), and isn't useful without an understanding of what
     character set it is.
     Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM
     and John Gilmore of Cygnus Support.  */
  
  /********************** 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			*/
  };
  
          /* IBM RS/6000 */
  #define U802WRMAGIC     0730    /* writeable text segments **chh**      */
  #define U802ROMAGIC     0735    /* readonly sharable text segments      */
  #define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
  
  #define BADMAG(x)	\
  	((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
  	 (x).f_magic != U802TOCMAGIC)
  
  #define	FILHDR	struct external_filehdr
  #define	FILHSZ	20
  
  
  /********************** AOUT "OPTIONAL HEADER" **********************/
  
  
  typedef struct
  {
    unsigned char	magic[2];	/* type of file			*/
    unsigned char	vstamp[2];	/* version stamp		*/
    unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry */
    unsigned char	dsize[4];	/* initialized data "  "	*/
    unsigned char	bsize[4];	/* uninitialized data "   "	*/
    unsigned char	entry[4];	/* entry pt.			*/
    unsigned char	text_start[4];	/* base of text used for this file */
    unsigned char	data_start[4];	/* base of data used for this file */
    unsigned char	o_toc[4];	/* address of TOC */
    unsigned char	o_snentry[2];	/* section number of entry point */
    unsigned char	o_sntext[2];	/* section number of .text section */
    unsigned char	o_sndata[2];	/* section number of .data section */
    unsigned char	o_sntoc[2];	/* section number of TOC */
    unsigned char	o_snloader[2];	/* section number of .loader section */
    unsigned char	o_snbss[2];	/* section number of .bss section */
    unsigned char	o_algntext[2];	/* .text alignment */
    unsigned char	o_algndata[2];	/* .data alignment */
    unsigned char	o_modtype[2];	/* module type (??) */
    unsigned char o_cputype[2];	/* cpu type */
    unsigned char	o_maxstack[4];	/* max stack size (??) */
    unsigned char o_maxdata[4];	/* max data size (??) */
    unsigned char	o_resv2[12];	/* reserved */
  }
  AOUTHDR;
  
  #define AOUTSZ 72
  #define SMALL_AOUTSZ (28)
  #define AOUTHDRSZ 72
  
  #define	RS6K_AOUTHDR_OMAGIC	0x0107	/* old: text & data writeable */
  #define	RS6K_AOUTHDR_NMAGIC	0x0108	/* new: text r/o, data r/w */
  #define	RS6K_AOUTHDR_ZMAGIC	0x010B	/* paged: text r/o, both page-aligned */
  
  
  /********************** 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 _PAD	".pad"
  #define _LOADER	".loader"
  
  #define	SCNHDR	struct external_scnhdr
  #define	SCNHSZ	40
  
  /* XCOFF uses a special .loader section with type STYP_LOADER.  */
  #define STYP_LOADER 0x1000
  
  /* XCOFF uses a special .debug section with type STYP_DEBUG.  */
  #define STYP_DEBUG 0x2000
  
  /* XCOFF handles line number or relocation overflow by creating
     another section header with STYP_OVRFLO set.  */
  #define STYP_OVRFLO 0x8000
  
  /********************** 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_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)) */
  
  	struct {
  		unsigned char x_scnlen[4];
  		unsigned char x_parmhash[4];
  		unsigned char x_snhash[2];
  		unsigned char x_smtyp[1];
  		unsigned char x_smclas[1];
  		unsigned char x_stab[4];
  		unsigned char x_snstab[2];
  	} x_csect;
  
  };
  
  #define	SYMENT	struct external_syment
  #define	SYMESZ	18
  #define	AUXENT	union external_auxent
  #define	AUXESZ	18
  #define DBXMASK 0x80		/* for dbx storage mask */
  #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
  
  
  
  /********************** RELOCATION DIRECTIVES **********************/
  
  
  struct external_reloc {
    char r_vaddr[4];
    char r_symndx[4];
    char r_size[1];
    char r_type[1];
  };
  
  
  #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