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/* IBM RS/6000 "XCOFF64" file definitions for BFD.

   Copyright (C) 2000 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

/********************** 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[8];/* file pointer to symtab      */

        char f_opthdr[2];       /* sizeof(optional hdr)         */

        char f_flags[2];        /* flags                        */

        char f_nsyms[4];        /* number of symtab entries     */

};

        /* IBM RS/6000 */

#define U803XTOCMAGIC 0757      /* readonly text segments and TOC, XCOFF64 */

#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC)

#define FILHDR  struct external_filehdr

#define FILHSZ  24

/********************** AOUT "OPTIONAL HEADER" **********************/

typedef struct

{

  unsigned char magic[2];               /* type of file                 */

  unsigned char vstamp[2];              /* version stamp                */

  unsigned char o_debugger[4];          /* reserved                     */

  unsigned char text_start[8];  /* base of text used for this file */

  unsigned char data_start[8];  /* base of data used for this file */

  unsigned char o_toc[8];       /* 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_resv2[4];             /* reserved                     */

  unsigned char tsize[8];               /* text size bytes, padded to FW bdry */

  unsigned char dsize[8];               /* initialized data "  "        */

  unsigned char bsize[8];               /* uninitialized data "   "     */

  unsigned char entry[8];               /* entry pt.                    */

  unsigned char o_maxstack[8];  /* max stack size (??)          */

  unsigned char o_maxdata[8];   /* max data size (??)           */

  unsigned char o_resv3[16];            /* reserved                     */

}

AOUTHDR;

#define AOUTSZ 120

#define SMALL_AOUTSZ (0)

#define AOUTHDRSZ 72

/********************** SECTION HEADER **********************/

struct external_scnhdr {

        char    s_name[8];              /* section name                 */

        char    s_paddr[8];     /* physical address, aliased s_nlib */

        char    s_vaddr[8];     /* virtual address              */

        char    s_size[8];      /* section size                 */

        char    s_scnptr[8];    /* file ptr to raw data for section */

        char    s_relptr[8];    /* file ptr to relocation       */

        char    s_lnnoptr[8];   /* file ptr to line numbers     */

        char    s_nreloc[4];    /* number of relocation entries */

        char    s_nlnno[4];     /* number of line number entries*/

        char    s_flags[4];             /* flags                        */

        char    s_pad[4];               /* padding */

};

#define SCNHDR  struct external_scnhdr

#define SCNHSZ  72

/********************** 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[8];        /* (physical) address of line number    */

        } l_addr;

        char l_lnno[4];         /* line number          */

};

#define LINENO  struct external_lineno

#define LINESZ  12

/********************** 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

{

  char e_value[8];

  char e_offset[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 {

        union {

            struct {

                char x_lnno[4];         /* declaration line number */

                char x_size[2];         /* str/union/array size */

            } x_lnsz;

            struct {

                char x_lnnoptr[8];/* ptr to fcn line */

                char x_fsize[4];         /* size of function */

                char x_endndx[4];        /* entry ndx past block end */

            } x_fcn;

        } x_fcnary;

    } x_sym;

    union {

        char x_fname[E_FILNMLEN];

        struct {

            char x_zeroes[4];

            char x_offset[4];

            char          x_pad[6];

            unsigned char x_ftype[1];

            unsigned char x_resv[2];

        } x_n;

    } x_file;

    struct {

        char x_exptr[8];

        char x_fsize[4];

        char x_endndx[4];

        char x_pad[1];

    } x_except;

    struct {

            unsigned char x_scnlen_lo[4];

            unsigned char x_parmhash[4];

            unsigned char x_snhash[2];

            unsigned char x_smtyp[1];

            unsigned char x_smclas[1];

            unsigned char x_scnlen_hi[4];

            unsigned char x_pad[1];

    } x_csect;

    struct {

        char x_pad[17];

        char x_auxtype[1];

    } x_auxtype;

};

#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)

/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */

#define _AUX_EXCEPT     255

#define _AUX_FCN        254

#define _AUX_SYM        253

#define _AUX_FILE       252

#define _AUX_CSECT      251

/********************** RELOCATION DIRECTIVES **********************/

struct external_reloc {

  char r_vaddr[8];

  char r_symndx[4];

  char r_size[1];

  char r_type[1];

};

#define RELOC struct external_reloc

#define RELSZ 14

#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

/* The ldhdr structure.  This appears at the start of the .loader

   section.  */

struct external_ldhdr

{

  bfd_byte l_version[4];

  bfd_byte l_nsyms[4];

  bfd_byte l_nreloc[4];

  bfd_byte l_istlen[4];

  bfd_byte l_nimpid[4];

  bfd_byte l_stlen[4];

  bfd_byte l_impoff[8];

  bfd_byte l_stoff[8];

  bfd_byte l_symoff[8];

  bfd_byte l_rldoff[8];

};

#define LDHDRSZ (56)

struct external_ldsym

{

  bfd_byte l_value[8];

  bfd_byte l_offset[4];

  bfd_byte l_scnum[2];

  bfd_byte l_smtype[1];

  bfd_byte l_smclas[1];

  bfd_byte l_ifile[4];

  bfd_byte l_parm[4];

};

#define LDSYMSZ (24)

struct external_ldrel

{

  bfd_byte l_vaddr[8];

  bfd_byte l_rtype[2];

  bfd_byte l_rsecnm[2];

  bfd_byte l_symndx[4];

};

#define LDRELSZ (16)