Annotation of sys/sys/exec_aout.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: exec_aout.h,v 1.22 2006/10/06 20:58:17 miod Exp $ */
2: /* $NetBSD: exec_aout.h,v 1.15 1996/05/18 17:20:54 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1993, 1994 Christopher G. Demetriou
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by Christopher G. Demetriou.
19: * 4. The name of the author may not be used to endorse or promote products
20: * derived from this software without specific prior written permission
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: #ifndef N_PAGSIZ
35: #define N_PAGSIZ(ex) (__LDPGSZ)
36: #endif
37:
38: /*
39: * Header prepended to each a.out file.
40: * only manipulate the a_midmag field via the
41: * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
42: */
43: struct exec {
44: u_int32_t a_midmag; /* htonl(flags<<26|mid<<16|magic) */
45: u_int32_t a_text; /* text segment size */
46: u_int32_t a_data; /* initialized data size */
47: u_int32_t a_bss; /* uninitialized data size */
48: u_int32_t a_syms; /* symbol table size */
49: u_int32_t a_entry; /* entry point */
50: u_int32_t a_trsize; /* text relocation size */
51: u_int32_t a_drsize; /* data relocation size */
52: };
53:
54: /* a_magic */
55: #define OMAGIC 0407 /* old impure format */
56: #define NMAGIC 0410 /* read-only text */
57: #define ZMAGIC 0413 /* demand load format */
58: #define QMAGIC 0314 /* "compact" demand load format; deprecated */
59:
60: /*
61: * a_mid - keep sorted in numerical order for sanity's sake
62: * ensure that: 0 < mid < 0x3ff
63: */
64: #define MID_ZERO 0 /* unknown - implementation dependent */
65: #define MID_SUN010 1 /* sun 68010/68020 binary */
66: #define MID_SUN020 2 /* sun 68020-only binary */
67: #define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */
68: #define MID_ROMPAOS 104 /* old IBM RT */
69: #define MID_I386 134 /* i386 BSD binary */
70: #define MID_M68K 135 /* m68k BSD binary with 8K page sizes */
71: #define MID_M68K4K 136 /* DO NOT USE: m68k BSD binary with 4K page sizes */
72: #define MID_NS32532 137 /* ns32532 */
73: #define MID_SPARC 138 /* sparc */
74: #define MID_PMAX 139 /* pmax */
75: #define MID_VAX1K 140 /* vax 1k page size */
76: #define MID_ALPHA 141 /* Alpha BSD binary */
77: #define MID_MIPS 142 /* big-endian MIPS */
78: #define MID_ARM6 143 /* ARM6 */
79: #define MID_SH3 145 /* SH3 */
80: #define MID_POWERPC 149 /* big-endian PowerPC */
81: #define MID_VAX 150 /* vax */
82: #define MID_SPARC64 151 /* LP64 sparc */
83: #define MID_MIPS2 152 /* MIPS2 */
84: #define MID_M88K 153 /* m88k BSD binary */
85: #define MID_HPPA 154 /* hppa */
86: #define MID_AMD64 157 /* AMD64 */
87: #define MID_MIPS64 158 /* big-endian MIPS64 */
88: #define MID_HP200 200 /* hp200 (68010) BSD binary */
89: #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
90: #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
91: #define MID_HPUX800 0x20B /* hp800 HP-UX binary pa1.0 */
92: #define MID_HPPA11 0x210 /* hp700 HP-UX binary pa1.1 */
93: #define MID_HPPA20 0x214 /* hp700 HP-UX binary pa2.0 */
94:
95: /*
96: * a_flags
97: */
98: #define EX_DYNAMIC 0x20
99: #define EX_PIC 0x10
100: #define EX_DPMASK 0x30
101: /*
102: * Interpretation of the (a_flags & EX_DPMASK) bits:
103: *
104: * 00 traditional executable or object file
105: * 01 object file contains PIC code (set by `as -k')
106: * 10 dynamic executable
107: * 11 position independent executable image
108: * (eg. a shared library)
109: *
110: */
111:
112: /*
113: * The a.out structure's a_midmag field is a network-byteorder encoding
114: * of this int
115: * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
116: * Where `F' is 6 bits of flag like EX_DYNAMIC,
117: * `m' is 10 bits of machine-id like MID_I386, and
118: * `M' is 16 bits worth of magic number, ie. ZMAGIC.
119: * The macros below will set/get the needed fields.
120: */
121: #define N_GETMAGIC(ex) \
122: ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
123: #define N_GETMAGIC2(ex) \
124: ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
125: (((ex).a_midmag) | 0x10000) )
126: #define N_GETMID(ex) \
127: ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
128: #define N_GETFLAG(ex) \
129: ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
130: #define N_SETMAGIC(ex,mag,mid,flag) \
131: ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
132: (((mag)&0xffff)) ) )
133:
134: #define N_ALIGN(ex,x) \
135: (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
136: ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
137:
138: /* Valid magic number check. */
139: #define N_BADMAG(ex) \
140: (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
141: N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
142:
143: /* Address of the bottom of the text segment. */
144: #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
145:
146: /* Address of the bottom of the data segment. */
147: #define N_DATADDR(ex) \
148: (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
149: (N_TXTADDR(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
150:
151: /* Address of the bottom of the bss segment. */
152: #define N_BSSADDR(ex) \
153: (N_DATADDR(ex) + (ex).a_data)
154:
155: /* Text segment offset. */
156: #define N_TXTOFF(ex) \
157: ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
158: 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
159: sizeof(struct exec)) )
160:
161: /* Data segment offset. */
162: #define N_DATOFF(ex) \
163: N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
164:
165: /* Text relocation table offset. */
166: #define N_TRELOFF(ex) \
167: (N_DATOFF(ex) + (ex).a_data)
168:
169: /* Data relocation table offset. */
170: #define N_DRELOFF(ex) \
171: (N_TRELOFF(ex) + (ex).a_trsize)
172:
173: /* Symbol table offset. */
174: #define N_SYMOFF(ex) \
175: (N_DRELOFF(ex) + (ex).a_drsize)
176:
177: /* String table offset. */
178: #define N_STROFF(ex) \
179: (N_SYMOFF(ex) + (ex).a_syms)
180:
181:
182: #ifdef _KERNEL
183:
184: /* the "a.out" format's entry in the exec switch */
185: int exec_aout_makecmds(struct proc *, struct exec_package *);
186:
187: /* functions which prepare various a.out executable types */
188: /*
189: * MI portion
190: */
191: int exec_aout_prep_zmagic(struct proc *, struct exec_package *);
192: int exec_aout_prep_nmagic(struct proc *, struct exec_package *);
193: int exec_aout_prep_omagic(struct proc *, struct exec_package *);
194:
195: /* For compatibility modules */
196: int exec_aout_prep_oldzmagic(struct proc *, struct exec_package *);
197: int exec_aout_prep_oldnmagic(struct proc *, struct exec_package *);
198: int exec_aout_prep_oldomagic(struct proc *, struct exec_package *);
199:
200: /*
201: * MD portion
202: */
203: #if !defined(cpu_exec_aout_makecmds)
204: int cpu_exec_aout_makecmds(struct proc *, struct exec_package *);
205: #endif
206:
207: #endif /* _KERNEL */
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