File: /usr/include/linux/a.out.h
1 #ifndef __A_OUT_GNU_H__
2 #define __A_OUT_GNU_H__
3
4 #define __GNU_EXEC_MACROS__
5
6 #ifndef __STRUCT_EXEC_OVERRIDE__
7
8 #include <asm/a.out.h>
9
10 #endif /* __STRUCT_EXEC_OVERRIDE__ */
11
12 /* these go in the N_MACHTYPE field */
13 enum machine_type {
14 #if defined (M_OLDSUN2)
15 M__OLDSUN2 = M_OLDSUN2,
16 #else
17 M_OLDSUN2 = 0,
18 #endif
19 #if defined (M_68010)
20 M__68010 = M_68010,
21 #else
22 M_68010 = 1,
23 #endif
24 #if defined (M_68020)
25 M__68020 = M_68020,
26 #else
27 M_68020 = 2,
28 #endif
29 #if defined (M_SPARC)
30 M__SPARC = M_SPARC,
31 #else
32 M_SPARC = 3,
33 #endif
34 /* skip a bunch so we don't run into any of sun's numbers */
35 M_386 = 100,
36 M_MIPS1 = 151, /* MIPS R3000/R3000 binary */
37 M_MIPS2 = 152 /* MIPS R6000/R4000 binary */
38 };
39
40 #if !defined (N_MAGIC)
41 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
42 #endif
43 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
44 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
45 #define N_SET_INFO(exec, magic, type, flags) \
46 ((exec).a_info = ((magic) & 0xffff) \
47 | (((int)(type) & 0xff) << 16) \
48 | (((flags) & 0xff) << 24))
49 #define N_SET_MAGIC(exec, magic) \
50 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
51
52 #define N_SET_MACHTYPE(exec, machtype) \
53 ((exec).a_info = \
54 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
55
56 #define N_SET_FLAGS(exec, flags) \
57 ((exec).a_info = \
58 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
59
60 /* Code indicating object file or impure executable. */
61 #define OMAGIC 0407
62 /* Code indicating pure executable. */
63 #define NMAGIC 0410
64 /* Code indicating demand-paged executable. */
65 #define ZMAGIC 0413
66 /* This indicates a demand-paged executable with the header in the text.
67 The first page is unmapped to help trap NULL pointer references */
68 #define QMAGIC 0314
69
70 /* Code indicating core file. */
71 #define CMAGIC 0421
72
73 #if !defined (N_BADMAG)
74 #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
75 && N_MAGIC(x) != NMAGIC \
76 && N_MAGIC(x) != ZMAGIC \
77 && N_MAGIC(x) != QMAGIC)
78 #endif
79
80 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
81
82 #if !defined (N_TXTOFF)
83 #define N_TXTOFF(x) \
84 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
85 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
86 #endif
87
88 #if !defined (N_DATOFF)
89 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
90 #endif
91
92 #if !defined (N_TRELOFF)
93 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
94 #endif
95
96 #if !defined (N_DRELOFF)
97 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
98 #endif
99
100 #if !defined (N_SYMOFF)
101 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
102 #endif
103
104 #if !defined (N_STROFF)
105 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
106 #endif
107
108 /* Address of text segment in memory after it is loaded. */
109 #if !defined (N_TXTADDR)
110 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
111 #endif
112
113 /* Address of data segment in memory after it is loaded.
114 Note that it is up to you to define SEGMENT_SIZE
115 on machines not listed here. */
116 #if defined(vax) || defined(hp300) || defined(pyr)
117 #define SEGMENT_SIZE page_size
118 #endif
119 #ifdef sony
120 #define SEGMENT_SIZE 0x2000
121 #endif /* Sony. */
122 #ifdef is68k
123 #define SEGMENT_SIZE 0x20000
124 #endif
125 #if defined(m68k) && defined(PORTAR)
126 #define PAGE_SIZE 0x400
127 #define SEGMENT_SIZE PAGE_SIZE
128 #endif
129
130 #ifdef linux
131 #include <asm/page.h>
132 #if defined(__i386__) || defined(__mc68000__)
133 #define SEGMENT_SIZE 1024
134 #else
135 #ifndef SEGMENT_SIZE
136 #define SEGMENT_SIZE PAGE_SIZE
137 #endif
138 #endif
139 #endif
140
141 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
142
143 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
144
145 #ifndef N_DATADDR
146 #define N_DATADDR(x) \
147 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
148 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
149 #endif
150
151 /* Address of bss segment in memory after it is loaded. */
152 #if !defined (N_BSSADDR)
153 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
154 #endif
155
156 #if !defined (N_NLIST_DECLARED)
157 struct nlist {
158 union {
159 char *n_name;
160 struct nlist *n_next;
161 long n_strx;
162 } n_un;
163 unsigned char n_type;
164 char n_other;
165 short n_desc;
166 unsigned long n_value;
167 };
168 #endif /* no N_NLIST_DECLARED. */
169
170 #if !defined (N_UNDF)
171 #define N_UNDF 0
172 #endif
173 #if !defined (N_ABS)
174 #define N_ABS 2
175 #endif
176 #if !defined (N_TEXT)
177 #define N_TEXT 4
178 #endif
179 #if !defined (N_DATA)
180 #define N_DATA 6
181 #endif
182 #if !defined (N_BSS)
183 #define N_BSS 8
184 #endif
185 #if !defined (N_FN)
186 #define N_FN 15
187 #endif
188
189 #if !defined (N_EXT)
190 #define N_EXT 1
191 #endif
192 #if !defined (N_TYPE)
193 #define N_TYPE 036
194 #endif
195 #if !defined (N_STAB)
196 #define N_STAB 0340
197 #endif
198
199 /* The following type indicates the definition of a symbol as being
200 an indirect reference to another symbol. The other symbol
201 appears as an undefined reference, immediately following this symbol.
202
203 Indirection is asymmetrical. The other symbol's value will be used
204 to satisfy requests for the indirect symbol, but not vice versa.
205 If the other symbol does not have a definition, libraries will
206 be searched to find a definition. */
207 #define N_INDR 0xa
208
209 /* The following symbols refer to set elements.
210 All the N_SET[ATDB] symbols with the same name form one set.
211 Space is allocated for the set in the text section, and each set
212 element's value is stored into one word of the space.
213 The first word of the space is the length of the set (number of elements).
214
215 The address of the set is made into an N_SETV symbol
216 whose name is the same as the name of the set.
217 This symbol acts like a N_DATA global symbol
218 in that it can satisfy undefined external references. */
219
220 /* These appear as input to LD, in a .o file. */
221 #define N_SETA 0x14 /* Absolute set element symbol */
222 #define N_SETT 0x16 /* Text set element symbol */
223 #define N_SETD 0x18 /* Data set element symbol */
224 #define N_SETB 0x1A /* Bss set element symbol */
225
226 /* This is output from LD. */
227 #define N_SETV 0x1C /* Pointer to set vector in data area. */
228
229 #if !defined (N_RELOCATION_INFO_DECLARED)
230 /* This structure describes a single relocation to be performed.
231 The text-relocation section of the file is a vector of these structures,
232 all of which apply to the text section.
233 Likewise, the data-relocation section applies to the data section. */
234
235 struct relocation_info
236 {
237 /* Address (within segment) to be relocated. */
238 int r_address;
239 /* The meaning of r_symbolnum depends on r_extern. */
240 unsigned int r_symbolnum:24;
241 /* Nonzero means value is a pc-relative offset
242 and it should be relocated for changes in its own address
243 as well as for changes in the symbol or section specified. */
244 unsigned int r_pcrel:1;
245 /* Length (as exponent of 2) of the field to be relocated.
246 Thus, a value of 2 indicates 1<<2 bytes. */
247 unsigned int r_length:2;
248 /* 1 => relocate with value of symbol.
249 r_symbolnum is the index of the symbol
250 in file's the symbol table.
251 0 => relocate with the address of a segment.
252 r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
253 (the N_EXT bit may be set also, but signifies nothing). */
254 unsigned int r_extern:1;
255 /* Four bits that aren't used, but when writing an object file
256 it is desirable to clear them. */
257 #ifdef NS32K
258 unsigned r_bsr:1;
259 unsigned r_disp:1;
260 unsigned r_pad:2;
261 #else
262 unsigned int r_pad:4;
263 #endif
264 };
265 #endif /* no N_RELOCATION_INFO_DECLARED. */
266
267
268 #endif /* __A_OUT_GNU_H__ */
269