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/* ARM COFF support for BFD.

   Copyright (C) 1998, 1999 Free Software Foundation, Inc.

   This file is part of BFD, the Binary File Descriptor library.

   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.  */

#define COFFARM 1

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

};

/* Bits for f_flags:

 *      F_RELFLG        relocation info stripped from file

 *      F_EXEC          file is executable (no unresolved external references)

 *      F_LNNO          line numbers stripped from file

 *      F_LSYMS         local symbols stripped from file

 *      F_INTERWORK     file supports switching between ARM and Thumb instruction sets

 *      F_INTERWORK_SET the F_INTERWORK bit is valid

 *      F_APCS_FLOAT    code passes float arguments in float registers

 *      F_PIC           code is reentrant/position-independent

 *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)

 *      F_APCS_26       file uses 26 bit ARM Procedure Calling Standard

 *      F_APCS_SET      the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised

 *      F_SOFT_FLOAT    code does not use floating point instructions

 */

#define F_RELFLG        (0x0001)

#define F_EXEC          (0x0002)

#define F_LNNO          (0x0004)

#define F_LSYMS         (0x0008)

#define F_INTERWORK     (0x0010)

#define F_INTERWORK_SET (0x0020)

#define F_APCS_FLOAT    (0x0040)

#undef  F_AR16WR

#define F_PIC           (0x0080)

#define F_AR32WR        (0x0100)

#define F_APCS_26       (0x0400)

#define F_APCS_SET      (0x0800)

#define F_SOFT_FLOAT    (0x2000)

/* Bits stored in flags field of the internal_f structure */

#define F_INTERWORK     (0x0010)

#define F_APCS_FLOAT    (0x0040)

#define F_PIC           (0x0080)

#define F_APCS26        (0x1000)

#define F_ARM_ARCHITECTURE_MASK (0x4000+0x0800+0x0400)

#define F_ARM_2         (0x0400)

#define F_ARM_2a        (0x0800)

#define F_ARM_3         (0x0c00)

#define F_ARM_3M        (0x4000)

#define F_ARM_4         (0x4400)

#define F_ARM_4T        (0x4800)

#define F_ARM_5         (0x4c00)

/*

 * ARMMAGIC ought to encoded the procesor type,

 * but it is too late to change it now, instead

 * the flags field of the internal_f structure

 * is used as shown above.

 *

 * XXX - NC 5/6/97

 */

#define ARMMAGIC        0xa00  /* I just made this up */

#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC))

#define ARMPEMAGIC      0x1c0

#define THUMBPEMAGIC    0x1c2

#undef  ARMBADMAG

#define ARMBADMAG(x) (((x).f_magic != ARMMAGIC) && ((x).f_magic != ARMPEMAGIC) && ((x).f_magic != THUMBPEMAGIC))

#define FILHDR  struct external_filehdr

#define FILHSZ  20

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

typedef struct

{

  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 */

}

AOUTHDR;

#define AOUTSZ 28

#define AOUTHDRSZ 28

#define OMAGIC          0404    /* object files, eg as output */

#define ZMAGIC          0413    /* demand load format, eg normal ld output */

#define STMAGIC         0401    /* target shlib */

#define SHMAGIC         0443    /* host   shlib */

/* define some NT default values */

/*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */

#define NT_SECTION_ALIGNMENT 0x1000

#define NT_FILE_ALIGNMENT    0x200  

#define NT_DEF_RESERVE       0x100000

#define NT_DEF_COMMIT        0x1000

/********************** 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"

/* We use the .rdata section to hold read only data.  */

#define _LIT    ".rdata"

/********************** 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        (0xf)

#define N_TMASK         (0x30)

#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 */

                char x_checksum[4];     /* section COMDAT checksum */

                char x_associated[2];   /* COMDAT associated section index */

                char x_comdat[1];       /* COMDAT selection number */

        } 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)) */

};

#define SYMENT  struct external_syment

#define SYMESZ  18      

#define AUXENT  union external_auxent

#define AUXESZ  18

#define _ETEXT  "etext"

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

#ifdef ARM_WINCE

struct external_reloc

{

  char r_vaddr[4];

  char r_symndx[4];

  char r_type[2];

};

#define RELOC struct external_reloc

#define RELSZ 10

#else

struct external_reloc

{

  char r_vaddr[4];

  char r_symndx[4];

  char r_type[2];

  char r_offset[4];

};

#define RELOC struct external_reloc

#define RELSZ 14

#endif