1 #ifndef _A_OUT_H
2 #define _A_OUT_H
3
4 #define __GNU_EXEC_MACROS__
5
6 struct exec {
7 unsigned long a_magic; /* Use macros N_MAGIC, etc for access */
8 unsigned a_text; /* length of text, in bytes */
9 unsigned a_data; /* length of data, in bytes */
10 unsigned a_bss; /* length of uninitialized data area for file, in bytes */
11 unsigned a_syms; /* length of symbol table data in file, in bytes */
12 unsigned a_entry; /* start address */
13 unsigned a_trsize; /* length of relocation info for text, in bytes */
14 unsigned a_drsize; /* length of relocation info for data, in bytes */
15 };
16
17 #ifndef N_MAGIC
18 #define N_MAGIC(exec) ((exec).a_magic)
19 #endif
20
21 #ifndef OMAGIC
22 /* Code indicating object file or impure executable. */
23 #define OMAGIC 0407
24 /* Code indicating pure executable. */
25 #define NMAGIC 0410
26 /* Code indicating demand-paged executable. */
27 #define ZMAGIC 0413
28 #endif /* not OMAGIC */
29
30 #ifndef N_BADMAG
31 #define N_BADMAG(x) \
32 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
33 && N_MAGIC(x) != ZMAGIC)
34 #endif
35
36 #define _N_BADMAG(x) \
37 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
38 && N_MAGIC(x) != ZMAGIC)
39
40 #define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec))
41
42 #ifndef N_TXTOFF
43 #define N_TXTOFF(x) \
44 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
45 #endif
46
47 #ifndef N_DATOFF
48 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
49 #endif
50
51 #ifndef N_TRELOFF
52 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
53 #endif
54
55 #ifndef N_DRELOFF
56 #define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
57 #endif
58
59 #ifndef N_SYMOFF
60 #define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
61 #endif
62
63 #ifndef N_STROFF
64 #define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
65 #endif
66
67 /* Address of text segment in memory after it is loaded. */
68 #ifndef N_TXTADDR
69 #define N_TXTADDR(x) 0
70 #endif
71
72 /* Address of data segment in memory after it is loaded.
73 Note that it is up to you to define SEGMENT_SIZE
74 on machines not listed here. */
75 #if defined(vax) || defined(hp300) || defined(pyr)
76 #define SEGMENT_SIZE PAGE_SIZE
77 #endif
78 #ifdef hp300
79 #define PAGE_SIZE 4096
80 #endif
81 #ifdef sony
82 #define SEGMENT_SIZE 0x2000
83 #endif /* Sony. */
84 #ifdef is68k
85 #define SEGMENT_SIZE 0x20000
86 #endif
87 #if defined(m68k) && defined(PORTAR)
88 #define PAGE_SIZE 0x400
89 #define SEGMENT_SIZE PAGE_SIZE
90 #endif
91
92 #define PAGE_SIZE 4096
93 #define SEGMENT_SIZE 1024
94
95 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
96
97 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
98
99 #ifndef N_DATADDR
100 #define N_DATADDR(x) \
101 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
102 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
103 #endif
104
105 /* Address of bss segment in memory after it is loaded. */
106 #ifndef N_BSSADDR
107 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
108 #endif
109
110 #ifndef N_NLIST_DECLARED
111 struct nlist {
112 union {
113 char *n_name;
114 struct nlist *n_next;
115 long n_strx;
116 } n_un;
117 unsigned char n_type;
118 char n_other;
119 short n_desc;
120 unsigned long n_value;
121 };
122 #endif
123
124 #ifndef N_UNDF
125 #define N_UNDF 0
126 #endif
127 #ifndef N_ABS
128 #define N_ABS 2
129 #endif
130 #ifndef N_TEXT
131 #define N_TEXT 4
132 #endif
133 #ifndef N_DATA
134 #define N_DATA 6
135 #endif
136 #ifndef N_BSS
137 #define N_BSS 8
138 #endif
139 #ifndef N_COMM
140 #define N_COMM 18
141 #endif
142 #ifndef N_FN
143 #define N_FN 15
144 #endif
145
146 #ifndef N_EXT
147 #define N_EXT 1
148 #endif
149 #ifndef N_TYPE
150 #define N_TYPE 036
151 #endif
152 #ifndef N_STAB
153 #define N_STAB 0340
154 #endif
155
156 /* The following type indicates the definition of a symbol as being
157 an indirect reference to another symbol. The other symbol
158 appears as an undefined reference, immediately following this symbol.
159
160 Indirection is asymmetrical. The other symbol's value will be used
161 to satisfy requests for the indirect symbol, but not vice versa.
162 If the other symbol does not have a definition, libraries will
163 be searched to find a definition. */
164 #define N_INDR 0xa
165
166 /* The following symbols refer to set elements.
167 All the N_SET[ATDB] symbols with the same name form one set.
168 Space is allocated for the set in the text section, and each set
169 element's value is stored into one word of the space.
170 The first word of the space is the length of the set (number of elements).
171
172 The address of the set is made into an N_SETV symbol
173 whose name is the same as the name of the set.
174 This symbol acts like a N_DATA global symbol
175 in that it can satisfy undefined external references. */
176
177 /* These appear as input to LD, in a .o file. */
178 #define N_SETA 0x14 /* Absolute set element symbol */
179 #define N_SETT 0x16 /* Text set element symbol */
180 #define N_SETD 0x18 /* Data set element symbol */
181 #define N_SETB 0x1A /* Bss set element symbol */
182
183 /* This is output from LD. */
184 #define N_SETV 0x1C /* Pointer to set vector in data area. */
185
186 #ifndef N_RELOCATION_INFO_DECLARED
187
188 /* This structure describes a single relocation to be performed.
189 The text-relocation section of the file is a vector of these structures,
190 all of which apply to the text section.
191 Likewise, the data-relocation section applies to the data section. */
192
193 struct relocation_info
194 {
195 /* Address (within segment) to be relocated. */
196 int r_address;
197 /* The meaning of r_symbolnum depends on r_extern. */
198 unsigned int r_symbolnum:24;
199 /* Nonzero means value is a pc-relative offset
200 and it should be relocated for changes in its own address
201 as well as for changes in the symbol or section specified. */
202 unsigned int r_pcrel:1;
203 /* Length (as exponent of 2) of the field to be relocated.
204 Thus, a value of 2 indicates 1<<2 bytes. */
205 unsigned int r_length:2;
206 /* 1 => relocate with value of symbol.
207 r_symbolnum is the index of the symbol
208 in file's the symbol table.
209 0 => relocate with the address of a segment.
210 r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
211 (the N_EXT bit may be set also, but signifies nothing). */
212 unsigned int r_extern:1;
213 /* Four bits that aren't used, but when writing an object file
214 it is desirable to clear them. */
215 unsigned int r_pad:4;
216 };
217 #endif /* no N_RELOCATION_INFO_DECLARED. */
218
219
220 #endif /* __A_OUT_GNU_H__ */
221
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