/* external.h  -- External COFF structures

  Copyright (C) 2001-2024 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 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.  */

#ifndef COFF_EXTERNAL_H
#define COFF_EXTERNAL_H

#ifndef DO_NOT_DEFINE_FILHDR
/********************** 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 FILHDR  struct external_filehdr
#define FILHSZ  20
#endif

#ifndef DO_NOT_DEFINE_AOUTHDR
/********************** AOUT "OPTIONAL 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      */
 } ATTRIBUTE_PACKED
AOUTHDR;

#define AOUTHDRSZ 28
#define AOUTSZ 28

typedef struct external_aouthdr64
{
 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.     */
}
AOUTHDR64;
#define AOUTHDRSZ64     24

#endif /* not DO_NOT_DEFINE_AOUTHDR */

#ifndef DO_NOT_DEFINE_SCNHDR
/********************** 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

/* Names of "special" sections.  */

#define _TEXT    ".text"
#define _DATA    ".data"
#define _BSS     ".bss"
#define _COMMENT ".comment"
#define _LIB     ".lib"
#endif /* not DO_NOT_DEFINE_SCNHDR */

#ifndef DO_NOT_DEFINE_LINENO

/********************** LINE NUMBERS **********************/

#ifndef L_LNNO_SIZE
#error  L_LNNO_SIZE needs to be defined
#endif

/* 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[L_LNNO_SIZE];     /* line number          */
};

#define LINENO  struct external_lineno
#define LINESZ  (4 + L_LNNO_SIZE)

#if L_LNNO_SIZE == 4
#define GET_LINENO_LNNO(abfd, ext)      H_GET_32 (abfd,      (ext->l_lnno))
#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_32 (abfd, val, (ext->l_lnno))
#endif
#if L_LNNO_SIZE == 2
#define GET_LINENO_LNNO(abfd, ext)      H_GET_16 (abfd,      (ext->l_lnno))
#define PUT_LINENO_LNNO(abfd, val, ext) H_PUT_16 (abfd, val, (ext->l_lnno))
#endif

#endif /* not DO_NOT_DEFINE_LINENO */

#ifndef DO_NOT_DEFINE_SYMENT
/********************** SYMBOLS **********************/

#define E_SYMNMLEN      8       /* # characters in a symbol name        */
#ifndef E_FILNMLEN
#define E_FILNMLEN      14
#endif
#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];
} ATTRIBUTE_PACKED ;

#define SYMENT  struct external_syment
#define SYMESZ  18

#ifndef N_BTMASK
#define N_BTMASK        0xf
#endif

#ifndef N_TMASK
#define N_TMASK         0x30
#endif

#ifndef N_BTSHFT
#define N_BTSHFT        4
#endif

#ifndef N_TSHIFT
#define N_TSHIFT        2
#endif

#endif /* not DO_NOT_DEFINE_SYMENT */

#ifndef DO_NOT_DEFINE_AUXENT

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 */
#ifdef INCLUDE_COMDAT_FIELDS_IN_AUXENT
   char x_checksum[4];            /* section COMDAT checksum         */
   char x_associated[2];          /* COMDAT associated section index */
   char x_comdat[1];              /* COMDAT selection number         */
#endif
 } 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)) */
} ATTRIBUTE_PACKED ;

#define AUXENT  union external_auxent
#define AUXESZ  18

#define _ETEXT  "etext"

#endif /* not DO_NOT_DEFINE_AUXENT */

#endif /* COFF_EXTERNAL_H */

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