/* 
 * Mach Operating System
 * Copyright (c) 1992,1993,1994,1995 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 * HISTORY
 * Revision 1.1  1994/06/30  16:29:52  bostic
 * coff.h
 *
 * Revision 2.3  93/01/19  08:59:12  danner
 * 	Fix TXTOFF to cope with assembler/linker incoherence viz
 * 	rounding in OMAGIC files.
 * 	[93/01/15            af]
 * 
 * Revision 2.2  93/01/14  17:12:13  danner
 * 	Adapted for Alpha.
 * 	[92/05/31            af]
 * 
 */
/*
 *	File: coff.h
 * 	Author: Alessandro Forin, Carnegie Mellon University
 *	Date:	10/89
 *
 *	Structure definitions for COFF headers
 */

struct filehdr {
	unsigned short	f_magic;	/* magic number */
	unsigned short	f_nscns;	/* number of sections */
	int		f_timdat;	/* time & date stamp */
	vm_offset_t	f_symptr;	/* file pointer to symtab */
	int		f_nsyms;	/* number of symtab entries */
	unsigned short	f_opthdr;	/* sizeof(optional hdr) */
	unsigned short	f_flags;	/* flags */
};

#define  F_EXEC		0000002

#define ALPHAMAGIC	0603

struct scnhdr {
	char		s_name[8];	/* section name */
	vm_offset_t	s_paddr;	/* physical address */
	vm_offset_t	s_vaddr;	/* virtual address */
	vm_offset_t	s_size;		/* section size */
	vm_offset_t	s_scnptr;	/* file ptr to raw data for section */
	vm_offset_t	s_relptr;	/* file ptr to relocation */
	vm_offset_t	s_lnnoptr;	/* file ptr to line numbers */
	unsigned short	s_nreloc;	/* number of relocation entries */
	unsigned short	s_nlnno;	/* number of line number entries */
	int		s_flags;	/* flags */
};

struct aouthdr {
	short		magic;		/* see magic.h */
	short		vstamp;		/* version stamp */
	int		pad;		/* help for cross compilers */
	vm_offset_t	tsize;		/* text size in bytes, padded to FW */
	vm_offset_t	dsize;		/* initialized data size */
	vm_offset_t	bsize;		/* uninitialized data size */
	vm_offset_t	entry;		/* entry point, value of "start" */
	vm_offset_t	text_start;	/* base of text used for this file */
	vm_offset_t	data_start;	/* base of data used for this file */
	vm_offset_t	bss_start;	/* base of bss used for this file  */
	int		gprmask;	/* general purpose register mask*/
	int		fprmask;	/* FPA register mask		*/
	vm_offset_t	gp_value;	/* the gp value used for this object*/
};

struct exechdr {
	struct filehdr	f;
	struct aouthdr	a;
};

/* Linker and assembler screwed: .o are not aligned, images are */
#define	SCNROUND	((long)16)

#define	N_COFFBADMAG(a) \
	((a).magic != OMAGIC && (a).magic != NMAGIC && (a).magic != ZMAGIC)

#define N_COFFTXTOFF(f, a) \
 (((a).magic == ZMAGIC) ? 0 : \
  (((f).f_flags & F_EXEC) ? \
   (((sizeof(struct filehdr) + sizeof(struct aouthdr) + \
     (f).f_nscns * sizeof(struct scnhdr)) + SCNROUND-1) & ~(SCNROUND-1)) \
   : (sizeof(struct filehdr) + sizeof(struct aouthdr) + \
      (f).f_nscns * sizeof(struct scnhdr))))