1/* a.out specifics for Sequent Symmetry running Dynix 3.x
2
3   Copyright 2001 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19#ifndef A_OUT_DYNIX3_H
20#define A_OUT_DYNIX3_H
21
22#define external_exec dynix_external_exec
23
24/* struct exec for Dynix 3
25
26   a_gdtbl and a_bootstrap are only for standalone binaries.
27   Shared data fields are not supported by the kernel as of Dynix 3.1,
28   but are supported by Dynix compiler programs.  */
29struct dynix_external_exec
30  {
31    unsigned char e_info[4];
32    unsigned char e_text[4];
33    unsigned char e_data[4];
34    unsigned char e_bss[4];
35    unsigned char e_syms[4];
36    unsigned char e_entry[4];
37    unsigned char e_trsize[4];
38    unsigned char e_drsize[4];
39    unsigned char e_g_code[8];
40    unsigned char e_g_data[8];
41    unsigned char e_g_desc[8];
42    unsigned char e_shdata[4];
43    unsigned char e_shbss[4];
44    unsigned char e_shdrsize[4];
45    unsigned char e_bootstrap[44];
46    unsigned char e_reserved[12];
47    unsigned char e_version[4];
48  };
49
50#define	EXEC_BYTES_SIZE	(128)
51
52/* All executables under Dynix are demand paged with read-only text,
53   Thus no NMAGIC.
54
55   ZMAGIC has a page of 0s at virtual 0,
56   XMAGIC has an invalid page at virtual 0.  */
57#define OMAGIC	0x12eb		/* .o */
58#define ZMAGIC	0x22eb		/* zero @ 0, demand load */
59#define XMAGIC	0x32eb		/* invalid @ 0, demand load */
60#define SMAGIC	0x42eb		/* standalone, not supported here */
61
62#define N_BADMAG(x) ((OMAGIC != N_MAGIC(x)) && \
63		     (ZMAGIC != N_MAGIC(x)) && \
64		     (XMAGIC != N_MAGIC(x)) && \
65		     (SMAGIC != N_MAGIC(x)))
66
67#define N_ADDRADJ(x) ((ZMAGIC == N_MAGIC(x) || XMAGIC == N_MAGIC(x)) ? 0x1000 : 0)
68
69#define N_TXTOFF(x) (EXEC_BYTES_SIZE)
70#define N_DATOFF(x) (N_TXTOFF(x) + N_TXTSIZE(x))
71#define N_SHDATOFF(x) (N_DATOFF(x) + (x).a_data)
72#define N_TRELOFF(x) (N_SHDATOFF(x) + (x).a_shdata)
73#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
74#define N_SHDRELOFF(x) (N_DRELOFF(x) + (x).a_drsize)
75#define N_SYMOFF(x) (N_SHDRELOFF(x) + (x).a_shdrsize)
76#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
77
78#define N_TXTADDR(x) \
79	(((OMAGIC == N_MAGIC(x)) || (SMAGIC == N_MAGIC(x))) ? 0 \
80	 : TEXT_START_ADDR + EXEC_BYTES_SIZE)
81
82#define N_TXTSIZE(x) \
83	(((OMAGIC == N_MAGIC(x)) || (SMAGIC == N_MAGIC(x))) ? ((x).a_text) \
84	 : ((x).a_text - N_ADDRADJ(x) - EXEC_BYTES_SIZE))
85
86#endif /* A_OUT_DYNIX3_H */
87