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/* 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