/* Copyright (C) 1987 Free Software Foundation, Inc.

This file is part of Gas, the GNU Assembler.

The GNU assembler is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY.  No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing.  Refer to the GNU Assembler General
Public License for full details.

Everyone is granted permission to copy, modify and redistribute
the GNU Assembler, but only under the conditions described in the
GNU Assembler General Public License.  A copy of this license is
supposed to have been given to you along with the GNU Assembler
so you can know your rights and responsibilities.  It should be
in a file named COPYING.  Among other things, the copyright
notice and this notice must be preserved on all copies.  */

/* JF I'm not sure where this file came from.  I put the permit.text message in
   it anyway.  This file came to me as part of the original VAX assembler */

#define OMAGIC 0407
#define NMAGIC 0410
#define ZMAGIC 0413

struct exec {
	long	a_magic;			/* number identifies as .o file and gives type of such. */
	unsigned a_text;		/* length of text, in bytes */
	unsigned a_data;		/* length of data, in bytes */
	unsigned a_bss;		/* length of uninitialized data area for file, in bytes */
	unsigned a_syms;		/* length of symbol table data in file, in bytes */
	unsigned a_entry;		/* start address */
	unsigned a_trsize;		/* length of relocation info for text, in bytes */
	unsigned a_drsize;		/* length of relocation info for data, in bytes */
};

#define N_BADMAG(x) \
 (((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && ((x).a_magic)!=ZMAGIC)

#define N_TXTOFF(x) \
 ((x).a_magic == ZMAGIC ? 1024 : sizeof(struct exec))

#define N_SYMOFF(x) \
 (N_TXTOFF(x) + (x).a_text + (x).a_data + (x).a_trsize + (x).a_drsize)

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

/* Address of text segment in memory after it is loaded.  */
#define N_TXTADDR(x) 0

#define SEGMENT_SIZE 2		/* random memory, halfword boundary */

/* Address of data segment in memory after it is loaded.
   Note that it is up to you to define SEGMENT_SIZE
   on machines not listed here.  */
#ifndef N_DATADDR
#define N_DATADDR(x) \
    (((x).a_magic==OMAGIC)? (N_TXTADDR(x)+(x).a_text) \
     : (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
#endif

/* Address of bss segment in memory after it is loaded.  */
#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)

struct nlist {
	union {
		char	*n_name;
		struct nlist *n_next;
		long	n_strx;
	} n_un;
	unsigned char	n_type;
	unsigned char	n_other;
	unsigned short	n_desc;
	unsigned long	n_value;
};

#define N_UNDF	0
#define N_ABS	2
#define N_TEXT	4
#define N_DATA	6
#define N_BSS	8
#define N_FN	31		/* JF: Someone claims this should be 31 instead of
			   15.  I just inherited this file; I didn't write
			   it.  Who is right? */

#define N_EXT 1
#define N_TYPE 036
#define N_STAB 0340

struct relocation_info {
	int	r_address;
	unsigned r_symbolnum:24,
		r_pcrel:1,
		r_length:2,
		r_extern:1,
		nuthin:4;
};