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/* a.out specifics for Sequent Symmetry running Dynix 3.x

   Copyright 2001 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

#ifndef A_OUT_DYNIX3_H

#define A_OUT_DYNIX3_H

#define external_exec dynix_external_exec

/* struct exec for Dynix 3

   a_gdtbl and a_bootstrap are only for standalone binaries.

   Shared data fields are not supported by the kernel as of Dynix 3.1,

   but are supported by Dynix compiler programs.  */

struct dynix_external_exec

  {

    unsigned char e_info[4];

    unsigned char e_text[4];

    unsigned char e_data[4];

    unsigned char e_bss[4];

    unsigned char e_syms[4];

    unsigned char e_entry[4];

    unsigned char e_trsize[4];

    unsigned char e_drsize[4];

    unsigned char e_g_code[8];

    unsigned char e_g_data[8];

    unsigned char e_g_desc[8];

    unsigned char e_shdata[4];

    unsigned char e_shbss[4];

    unsigned char e_shdrsize[4];

    unsigned char e_bootstrap[44];

    unsigned char e_reserved[12];

    unsigned char e_version[4];

  };

#define EXEC_BYTES_SIZE (128)

/* All executables under Dynix are demand paged with read-only text,

   Thus no NMAGIC.

   ZMAGIC has a page of 0s at virtual 0,

   XMAGIC has an invalid page at virtual 0.  */

#define OMAGIC  0x12eb          /* .o */

#define ZMAGIC  0x22eb          /* zero @ 0, demand load */

#define XMAGIC  0x32eb          /* invalid @ 0, demand load */

#define SMAGIC  0x42eb          /* standalone, not supported here */

#define N_BADMAG(x) ((OMAGIC != N_MAGIC(x)) && \

                     (ZMAGIC != N_MAGIC(x)) && \

                     (XMAGIC != N_MAGIC(x)) && \

                     (SMAGIC != N_MAGIC(x)))

#define N_ADDRADJ(x) ((ZMAGIC == N_MAGIC(x) || XMAGIC == N_MAGIC(x)) ? 0x1000 : 0)

#define N_TXTOFF(x) (EXEC_BYTES_SIZE)

#define N_DATOFF(x) (N_TXTOFF(x) + N_TXTSIZE(x))

#define N_SHDATOFF(x) (N_DATOFF(x) + (x).a_data)

#define N_TRELOFF(x) (N_SHDATOFF(x) + (x).a_shdata)

#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)

#define N_SHDRELOFF(x) (N_DRELOFF(x) + (x).a_drsize)

#define N_SYMOFF(x) (N_SHDRELOFF(x) + (x).a_shdrsize)

#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)

#define N_TXTADDR(x) \

        (((OMAGIC == N_MAGIC(x)) || (SMAGIC == N_MAGIC(x))) ? 0 \

         : TEXT_START_ADDR + EXEC_BYTES_SIZE)

#define N_TXTSIZE(x) \

        (((OMAGIC == N_MAGIC(x)) || (SMAGIC == N_MAGIC(x))) ? ((x).a_text) \

         : ((x).a_text - N_ADDRADJ(x) - EXEC_BYTES_SIZE))

#endif /* A_OUT_DYNIX3_H */