Subversion Repositories or1k

/* COFF specification for OpenRISC 1000.

   Copyright (C) 1993-2000 Free Software Foundation, Inc.

   Contributed by David Wood @ New York University.

   Modified by Johan Rydberg, <johan.rydberg@netinsight.se>

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.  */

#ifndef OR32

# define OR32

#endif

#define L_LNNO_SIZE 2

#define INCLUDE_COMDAT_FIELDS_IN_AUXENT

#include "coff/external.h"

/* Magic numbers for OpenRISC 1000. As it is know we use the

   numbers for Am29000.

   (AT&T will assign the "real" magic number) */

#define SIPFBOMAGIC     0572    /* Am29000 (Byte 0 is MSB) */

#define SIPRBOMAGIC     0573    /* Am29000 (Byte 0 is LSB) */

#define OR32_MAGIC_BIG          SIPFBOMAGIC     

#define OR32_MAGIC_LITTLE       SIPRBOMAGIC     

#define OR32BADMAG(x)     (((x).f_magic!=OR32_MAGIC_BIG) && \

                                              ((x).f_magic!=OR32_MAGIC_LITTLE))

#define OMAGIC OR32_MAGIC_BIG

/* aouthdr magic numbers */

#define NMAGIC    0410    /* separate i/d executable */

#define SHMAGIC   0406          /* NYU/Ultra3 shared data executable 

                            (writable text) */

#undef  _ETEXT

#define _ETEXT          "_etext"

#define STYP_BSSREG 0x1200      /* Global register area (like STYP_INFO) */

#define STYP_ENVIR  0x2200      /* Environment (like STYP_INFO) */

#define STYP_ABS    0x4000      /* Absolute (allocated, not reloc, loaded) */

/*

** Relocation information declaration and related definitions

*/

struct external_reloc

{

  char r_vaddr[4];      /* (virtual) address of reference */

  char r_symndx[4];     /* index into symbol table */

  char r_type[2];       /* relocation type */

};

#define RELOC           struct external_reloc

#define RELSZ           10              /* sizeof (RELOC) */ 

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/

/*

** Relocation types for the Am29000

*/

#define R_ABS           0        /* reference is absolute */

#define R_IREL          030     /* instruction relative (jmp/call) */

#define R_IABS          031     /* instruction absolute (jmp/call) */

#define R_ILOHALF       032     /* instruction low half  (const)  */

#define R_IHIHALF       033     /* instruction high half (consth) part 1 */

#define R_IHCONST       034     /* instruction high half (consth) part 2 */

                                /* constant offset of R_IHIHALF relocation */

#define R_BYTE          035     /* relocatable byte value */

#define R_HWORD         036     /* relocatable halfword value */

#define R_WORD          037     /* relocatable word value */

#define R_IGLBLRC       040     /* instruction global register RC */

#define R_IGLBLRA       041     /* instruction global register RA */

#define R_IGLBLRB       042     /* instruction global register RB */

/*

NOTE:

All the "I" forms refer to 29000 instruction formats.  The linker is

expected to know how the numeric information is split and/or aligned

within the instruction word(s).  R_BYTE works for instructions, too.

If the parameter to a CONSTH instruction is a relocatable type, two

relocation records are written.  The first has an r_type of R_IHIHALF

(33 octal) and a normal r_vaddr and r_symndx.  The second relocation

record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which

is redundant), and an r_symndx containing the 32-bit constant offset

to the relocation instead of the actual symbol table index.  This

second record is always written, even if the constant offset is zero.

The constant fields of the instruction are set to zero.

*/

/*--------------------------------------------------------------*/

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/

/*

** Storage class definitions - new classes for global registers.

*/

#define C_GLBLREG       19              /* global register */

#define C_EXTREG        20              /* external global register */

#define C_DEFREG        21              /* ext. def. of global register */