/* IBM RS/6000 "XCOFF" file definitions for BFD.
  Copyright (C) 1990-2024 Free Software Foundation, Inc.
  Written by Mimi Phuong-Thao Vo of IBM
  and John Gilmore of Cygnus Support.

  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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  MA 02110-1301, 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[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_debugger[4];          /* reserved */
 unsigned char o_textpsize[1];         /* text page size */
 unsigned char o_datapsize[1];         /* data page size */
 unsigned char o_stackpsize[1];        /* stack page size */
 unsigned char o_flags[1];             /* Flags and TLS alignment */
 unsigned char o_sntdata[2];           /* section number of .tdata section */
 unsigned char o_sntbss[2];            /* section number of .tbss section */
}
AOUTHDR;

#define AOUTSZ 72
#define SMALL_AOUTSZ (28)
#define AOUTHDRSZ 72

/********************** 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                        */
};

#define SCNHDR  struct external_scnhdr
#define SCNHSZ  40

/********************** 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_pad1[2];
   char x_lnno[4];     /* Source line number */
   char x_pad[12];
 } x_sym;

 struct {
   char x_exptr[4];
   char x_fsize[4];
   char x_lnnoptr[4];
   char x_endndx[4];
   char x_pad[1];
 } x_fcn;

 struct {
   union {
     char x_fname[E_FILNMLEN];
     struct {
       char x_zeroes[4];
       char x_offset[4];
     } x_n;
   } x_n;
   char x_ftype[1];
   char x_resv[3];
 } x_file;

 struct {
   char x_scnlen[4];   /* section length */
   char x_nreloc[2];   /* # relocation entries */
   char x_nlinno[2];   /* # line numbers */
   char x_pad[10];
 } x_scn;

 struct {
   char x_scnlen[4];
   char x_parmhash[4];
   char x_snhash[2];
   char x_smtyp[1];
   char x_smclas[1];
   char x_stab[4];
   char x_snstab[2];
 } x_csect;

 struct {
   char x_scnlen[4];
   char x_pad1[4];
   char x_nreloc[4];
   char x_pad2[6];
 } x_sect;

};

#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

/* 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_impoff[4];
 bfd_byte l_stlen[4];
 bfd_byte l_stoff[4];
};

#define LDHDRSZ (8 * 4)

struct external_ldsym
{
 union
   {
     bfd_byte _l_name[E_SYMNMLEN];
     struct
       {
         bfd_byte _l_zeroes[4];
         bfd_byte _l_offset[4];
       } _l_l;
   } _l;
 bfd_byte l_value[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 (8 + 3 * 4 + 2 + 2)

struct external_ldrel
{
 bfd_byte l_vaddr[4];
 bfd_byte l_symndx[4];
 bfd_byte l_rtype[2];
 bfd_byte l_rsecnm[2];
};

#define LDRELSZ (2 * 4 + 2 * 2)

struct external_exceptab
{
 union {
   bfd_byte e_symndx[4];
   bfd_byte e_paddr[4];
 } e_addr;
 bfd_byte e_lang[1];
 bfd_byte e_reason[1];
};

#define EXCEPTSZ (4 + 2)

/******************** Core files *************************/

struct external_core_dumpx
{
 unsigned char c_signo[1];
 unsigned char c_flag[1];
 unsigned char c_entries[2];

 unsigned char c_version[4];

 unsigned char c_fdsinfox[8];
 unsigned char c_loader[8];
 unsigned char c_lsize[8];

 unsigned char c_n_thr[4];
 unsigned char c_reserved0[4];
 unsigned char c_thr[8];

 unsigned char c_segs[8];
 unsigned char c_segregion[8];

 unsigned char c_stack[8];
 unsigned char c_stackorg[8];
 unsigned char c_size[8];

 unsigned char c_data[8];
 unsigned char c_dataorg[8];
 unsigned char c_datasize[8];
 unsigned char c_sdorg[8];
 unsigned char c_sdsize[8];

 unsigned char c_vmmregions[8];
 unsigned char c_vmm[8];

 unsigned char c_impl[4];
 unsigned char c_pad[4];
 unsigned char c_cprs[8];
 unsigned char c_reserved[7 * 8];

 /* Followed by:
    - context of the faulting thread.
    - user structure.  */
};


/* Core file verion.  */
#define CORE_DUMPX_VERSION 0x0feeddb1
#define CORE_DUMPXX_VERSION 0x0feeddb2

struct external_ld_info32
{
 unsigned char ldinfo_next[4];
 unsigned char core_offset[4];
 unsigned char ldinfo_textorg[4];
 unsigned char ldinfo_textsize[4];
 unsigned char ldinfo_dataorg[4];
 unsigned char ldinfo_datasize[4];
 unsigned char ldinfo_filename[2];
};

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