exec_aout.h Source File

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exec_aout.h
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1 /* gxemul: $Id: exec_aout.h,v 1.3 2005-03-05 12:34:02 debug Exp $ */
2 
3 #ifndef __EXEC_AOUT_H
4 #define __EXEC_AOUT_H
5 
6 /* $OpenBSD: exec_aout.h,v 1.9 1998/04/25 06:28:14 niklas Exp $ */
7 /* $NetBSD: exec_aout.h,v 1.15 1996/05/18 17:20:54 christos Exp $ */
8 
9 /*
10  * Copyright (c) 1993, 1994 Christopher G. Demetriou
11  * All rights reserved.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  * notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in the
20  * documentation and/or other materials provided with the distribution.
21  * 3. All advertising materials mentioning features or use of this software
22  * must display the following acknowledgement:
23  * This product includes software developed by Christopher G. Demetriou.
24  * 4. The name of the author may not be used to endorse or promote products
25  * derived from this software without specific prior written permission
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
32  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37  */
38 
39 #ifndef N_PAGSIZ
40 #define N_PAGSIZ(ex) (__LDPGSZ)
41 #endif
42 
43 /*
44  * Header prepended to each a.out file.
45  * only manipulate the a_midmag field via the
46  * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
47  */
48 struct exec {
49  uint32_t a_midmag; /* htonl(flags<<26|mid<<16|magic) */
50  uint32_t a_text; /* text segment size */
51  uint32_t a_data; /* initialized data size */
52  uint32_t a_bss; /* uninitialized data size */
53  uint32_t a_syms; /* symbol table size */
54  uint32_t a_entry; /* entry point */
55  uint32_t a_trsize; /* text relocation size */
56  uint32_t a_drsize; /* data relocation size */
57 };
58 
59 /* a_magic */
60 #define OMAGIC 0407 /* old impure format */
61 #define NMAGIC 0410 /* read-only text */
62 #define ZMAGIC 0413 /* demand load format */
63 #define QMAGIC 0314 /* "compact" demand load format; deprecated */
64 
65 /*
66  * a_mid - keep sorted in numerical order for sanity's sake
67  * ensure that: 0 < mid < 0x3ff
68  */
69 #define MID_ZERO 0 /* unknown - implementation dependent */
70 #define MID_SUN010 1 /* sun 68010/68020 binary */
71 #define MID_SUN020 2 /* sun 68020-only binary */
72 #define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */
73 #define MID_ROMPAOS 104 /* old IBM RT */
74 #define MID_I386 134 /* i386 BSD binary */
75 #define MID_M68K 135 /* m68k BSD binary with 8K page sizes */
76 #define MID_M68K4K 136 /* DO NOT USE: m68k BSD binary with 4K page sizes */
77 #define MID_NS32532 137 /* ns32532 */
78 #define MID_SPARC 138 /* sparc */
79 #define MID_PMAX 139 /* pmax */
80 #define MID_VAX 140 /* vax */
81 #define MID_ALPHA 141 /* Alpha BSD binary */
82 #define MID_MIPS 142 /* big-endian MIPS */
83 #define MID_ARM6 143 /* ARM6 */
84 #define MID_ROMP 149 /* IBM RT */
85 #define MID_M88K 151 /* m88k BSD binary */
86 #define MID_HP200 200 /* hp200 (68010) BSD binary */
87 #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
88 #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
89 #define MID_HPUX800 0x20B /* hp800 HP-UX binary */
90 
91 /*
92  * a_flags
93  */
94 #define EX_DYNAMIC 0x20
95 #define EX_PIC 0x10
96 #define EX_DPMASK 0x30
97 /*
98  * Interpretation of the (a_flags & EX_DPMASK) bits:
99  *
100  * 00 traditional executable or object file
101  * 01 object file contains PIC code (set by `as -k')
102  * 10 dynamic executable
103  * 11 position independent executable image
104  * (eg. a shared library)
105  *
106  */
107 
108 /*
109  * The a.out structure's a_midmag field is a network-byteorder encoding
110  * of this int
111  * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
112  * Where `F' is 6 bits of flag like EX_DYNAMIC,
113  * `m' is 10 bits of machine-id like MID_I386, and
114  * `M' is 16 bits worth of magic number, ie. ZMAGIC.
115  * The macros below will set/get the needed fields.
116  */
117 #define N_GETMAGIC(ex) \
118  ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
119 #define N_GETMAGIC2(ex) \
120  ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
121  (((ex).a_midmag) | 0x10000) )
122 #define N_GETMID(ex) \
123  ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
124 #define N_GETFLAG(ex) \
125  ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
126 #define N_SETMAGIC(ex,mag,mid,flag) \
127  ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
128  (((mag)&0xffff)) ) )
129 
130 #define N_ALIGN(ex,x) \
131  (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
132  ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
133 
134 /* Valid magic number check. */
135 #define N_BADMAG(ex) \
136  (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
137  N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
138 
139 /* Address of the bottom of the text segment. */
140 #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
141 
142 /* Address of the bottom of the data segment. */
143 #define N_DATADDR(ex) \
144  (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
145  (N_TXTADDR(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
146 
147 /* Address of the bottom of the bss segment. */
148 #define N_BSSADDR(ex) \
149  (N_DATADDR(ex) + (ex).a_data)
150 
151 /* Text segment offset. */
152 #define N_TXTOFF(ex) \
153  ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
154  0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
155  sizeof(struct exec)) )
156 
157 /* Data segment offset. */
158 #define N_DATOFF(ex) \
159  N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
160 
161 /* Text relocation table offset. */
162 #define N_TRELOFF(ex) \
163  (N_DATOFF(ex) + (ex).a_data)
164 
165 /* Data relocation table offset. */
166 #define N_DRELOFF(ex) \
167  (N_TRELOFF(ex) + (ex).a_trsize)
168 
169 /* Symbol table offset. */
170 #define N_SYMOFF(ex) \
171  (N_DRELOFF(ex) + (ex).a_drsize)
172 
173 /* String table offset. */
174 #define N_STROFF(ex) \
175  (N_SYMOFF(ex) + (ex).a_syms)
176 
177 
178 #ifdef _KERNEL
179 
180 /* the "a.out" format's entry in the exec switch */
181 int exec_aout_makecmds __P((struct proc *, struct exec_package *));
182 
183 /* functions which prepare various a.out executable types */
184 /*
185  * MI portion
186  */
187 int exec_aout_prep_zmagic __P((struct proc *, struct exec_package *));
188 int exec_aout_prep_nmagic __P((struct proc *, struct exec_package *));
189 int exec_aout_prep_omagic __P((struct proc *, struct exec_package *));
190 
191 /* For compatibility modules */
192 int exec_aout_prep_oldzmagic __P((struct proc *, struct exec_package *));
193 int exec_aout_prep_oldnmagic __P((struct proc *, struct exec_package *));
194 int exec_aout_prep_oldomagic __P((struct proc *, struct exec_package *));
195 
196 /*
197  * MD portion
198  */
199 int cpu_exec_aout_makecmds __P((struct proc *, struct exec_package *));
200 
201 #endif /* _KERNEL */
202 
203 #endif /* __EXEC_AOUT_H */
204 
uint32_t a_midmag
Definition: exec_aout.h:49
uint32_t a_drsize
Definition: exec_aout.h:56
uint32_t a_bss
Definition: exec_aout.h:52
uint32_t a_syms
Definition: exec_aout.h:53
uint32_t a_data
Definition: exec_aout.h:51
uint32_t a_entry
Definition: exec_aout.h:54
uint32_t a_trsize
Definition: exec_aout.h:55
#define __P(x)
Definition: dec_prom.h:6
Definition: exec_aout.h:48
uint32_t a_text
Definition: exec_aout.h:50

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