1 | /* $NetBSD: exec_aout.h,v 1.41 2016/06/03 15:14:57 dholland Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1993, 1994 Christopher G. Demetriou |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. All advertising materials mentioning features or use of this software |
16 | * must display the following acknowledgement: |
17 | * This product includes software developed by Christopher G. Demetriou. |
18 | * 4. The name of the author may not be used to endorse or promote products |
19 | * derived from this software without specific prior written permission |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | #ifndef _SYS_EXEC_AOUT_H_ |
34 | #define _SYS_EXEC_AOUT_H_ |
35 | |
36 | #ifndef N_PAGSIZ |
37 | #define N_PAGSIZ(ex) (AOUT_LDPGSZ) |
38 | #endif |
39 | |
40 | /* |
41 | * Header prepended to each a.out file. |
42 | * only manipulate the a_midmag field via the |
43 | * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below. |
44 | */ |
45 | struct exec { |
46 | unsigned long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ |
47 | unsigned long a_text; /* text segment size */ |
48 | unsigned long a_data; /* initialized data size */ |
49 | unsigned long a_bss; /* uninitialized data size */ |
50 | unsigned long a_syms; /* symbol table size */ |
51 | unsigned long a_entry; /* entry point */ |
52 | unsigned long a_trsize; /* text relocation size */ |
53 | unsigned long a_drsize; /* data relocation size */ |
54 | }; |
55 | |
56 | /* a_magic */ |
57 | #define OMAGIC 0407 /* old impure format */ |
58 | #define NMAGIC 0410 /* read-only text */ |
59 | #define ZMAGIC 0413 /* demand load format */ |
60 | #define QMAGIC 0314 /* "compact" demand load format; deprecated */ |
61 | |
62 | #include <sys/aout_mids.h> |
63 | |
64 | /* |
65 | * a_flags |
66 | */ |
67 | #define EX_DYNAMIC 0x20 |
68 | #define EX_PIC 0x10 |
69 | #define EX_DPMASK 0x30 |
70 | /* |
71 | * Interpretation of the (a_flags & EX_DPMASK) bits: |
72 | * |
73 | * 00 traditional executable or object file |
74 | * 01 object file contains PIC code (set by `as -k') |
75 | * 10 dynamic executable |
76 | * 11 position independent executable image |
77 | * (eg. a shared library) |
78 | * |
79 | */ |
80 | |
81 | /* |
82 | * The a.out structure's a_midmag field is a network-byteorder encoding |
83 | * of this int |
84 | * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM |
85 | * Where `F' is 6 bits of flag like EX_DYNAMIC, |
86 | * `m' is 10 bits of machine-id like MID_I386, and |
87 | * `M' is 16 bits worth of magic number, ie. ZMAGIC. |
88 | * The macros below will set/get the needed fields. |
89 | */ |
90 | #define N_GETMAGIC(ex) \ |
91 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
92 | (be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag)) |
93 | #define N_GETMAGIC2(ex) \ |
94 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
95 | (be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000)) |
96 | #define N_GETMID(ex) \ |
97 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
98 | ((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO) |
99 | #define N_GETFLAG(ex) \ |
100 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
101 | ((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0) |
102 | #define N_SETMAGIC(ex,mag,mid,flag) \ |
103 | ((ex).a_midmag = htobe32((uint32_t) \ |
104 | ((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff))))) |
105 | |
106 | #define N_ALIGN(ex,x) \ |
107 | (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \ |
108 | ((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x)) |
109 | |
110 | /* Valid magic number check. */ |
111 | #define N_BADMAG(ex) \ |
112 | (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \ |
113 | N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC) |
114 | |
115 | /* Address of the bottom of the text segment. */ |
116 | #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ) |
117 | |
118 | /* Address of the bottom of the data segment. */ |
119 | #define N_DATADDR(ex) \ |
120 | (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \ |
121 | (N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1)) |
122 | |
123 | /* Address of the bottom of the bss segment. */ |
124 | #define N_BSSADDR(ex) \ |
125 | (N_DATADDR(ex) + (ex).a_data) |
126 | |
127 | /* Text segment offset. */ |
128 | #define N_TXTOFF(ex) \ |
129 | ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \ |
130 | 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \ |
131 | sizeof(struct exec)) ) |
132 | |
133 | /* Data segment offset. */ |
134 | #define N_DATOFF(ex) \ |
135 | N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) |
136 | |
137 | /* Text relocation table offset. */ |
138 | #define N_TRELOFF(ex) \ |
139 | (N_DATOFF(ex) + (ex).a_data) |
140 | |
141 | /* Data relocation table offset. */ |
142 | #define N_DRELOFF(ex) \ |
143 | (N_TRELOFF(ex) + (ex).a_trsize) |
144 | |
145 | /* Symbol table offset. */ |
146 | #define N_SYMOFF(ex) \ |
147 | (N_DRELOFF(ex) + (ex).a_drsize) |
148 | |
149 | /* String table offset. */ |
150 | #define N_STROFF(ex) \ |
151 | (N_SYMOFF(ex) + (ex).a_syms) |
152 | |
153 | #include <machine/aout_machdep.h> |
154 | |
155 | #ifdef _KERNEL |
156 | |
157 | /* the "a.out" format's entry in the exec switch */ |
158 | int exec_aout_makecmds(struct lwp *, struct exec_package *); |
159 | |
160 | /* functions which prepare various a.out executable types */ |
161 | /* |
162 | * MI portion |
163 | */ |
164 | int exec_aout_prep_zmagic(struct lwp *, struct exec_package *); |
165 | int exec_aout_prep_nmagic(struct lwp *, struct exec_package *); |
166 | int exec_aout_prep_omagic(struct lwp *, struct exec_package *); |
167 | |
168 | /* For compatibility modules */ |
169 | int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *); |
170 | int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *); |
171 | int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *); |
172 | |
173 | /* |
174 | * MD portion |
175 | */ |
176 | #ifndef cpu_exec_aout_makecmds |
177 | int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *); |
178 | #endif |
179 | |
180 | #endif /* _KERNEL */ |
181 | |
182 | #endif /* !_SYS_EXEC_AOUT_H_ */ |
183 | |