linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __A_OUT_GNU_H__
3 #define __A_OUT_GNU_H__
4
5 #define __GNU_EXEC_MACROS__
6
7 #ifndef __STRUCT_EXEC_OVERRIDE__
8
9 #include <asm/a.out.h>
10
11 #endif /* __STRUCT_EXEC_OVERRIDE__ */
12
13 #ifndef __ASSEMBLY__
14
15 /* these go in the N_MACHTYPE field */
16 enum machine_type {
17 #if defined (M_OLDSUN2)
18 M__OLDSUN2 = M_OLDSUN2,
19 #else
20 M_OLDSUN2 = 0,
21 #endif
22 #if defined (M_68010)
23 M__68010 = M_68010,
24 #else
25 M_68010 = 1,
26 #endif
27 #if defined (M_68020)
28 M__68020 = M_68020,
29 #else
30 M_68020 = 2,
31 #endif
32 #if defined (M_SPARC)
33 M__SPARC = M_SPARC,
34 #else
35 M_SPARC = 3,
36 #endif
37 /* skip a bunch so we don't run into any of sun's numbers */
38 M_386 = 100,
39 M_MIPS1 = 151, /* MIPS R3000/R3000 binary */
40 M_MIPS2 = 152 /* MIPS R6000/R4000 binary */
41 };
42
43 #if !defined (N_MAGIC)
44 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
45 #endif
46 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
47 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
48 #define N_SET_INFO(exec, magic, type, flags) \
49 ((exec).a_info = ((magic) & 0xffff) \
50 | (((int)(type) & 0xff) << 16) \
51 | (((flags) & 0xff) << 24))
52 #define N_SET_MAGIC(exec, magic) \
53 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
54
55 #define N_SET_MACHTYPE(exec, machtype) \
56 ((exec).a_info = \
57 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
58
59 #define N_SET_FLAGS(exec, flags) \
60 ((exec).a_info = \
61 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
62
63 /* Code indicating object file or impure executable. */
64 #define OMAGIC 0407
65 /* Code indicating pure executable. */
66 #define NMAGIC 0410
67 /* Code indicating demand-paged executable. */
68 #define ZMAGIC 0413
69 /* This indicates a demand-paged executable with the header in the text.
70 The first page is unmapped to help trap NULL pointer references */
71 #define QMAGIC 0314
72
73 /* Code indicating core file. */
74 #define CMAGIC 0421
75
76 #if !defined (N_BADMAG)
77 #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
78 && N_MAGIC(x) != NMAGIC \
79 && N_MAGIC(x) != ZMAGIC \
80 && N_MAGIC(x) != QMAGIC)
81 #endif
82
83 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
84
85 #if !defined (N_TXTOFF)
86 #define N_TXTOFF(x) \
87 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
88 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
89 #endif
90
91 #if !defined (N_DATOFF)
92 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
93 #endif
94
95 #if !defined (N_TRELOFF)
96 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
97 #endif
98
99 #if !defined (N_DRELOFF)
100 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
101 #endif
102
103 #if !defined (N_SYMOFF)
104 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
105 #endif
106
107 #if !defined (N_STROFF)
108 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
109 #endif
110
111 /* Address of text segment in memory after it is loaded. */
112 #if !defined (N_TXTADDR)
113 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
114 #endif
115
116 /* Address of data segment in memory after it is loaded. */
117 #include <unistd.h>
118 #if defined(__i386__) || defined(__mc68000__)
119 #define SEGMENT_SIZE 1024
120 #else
121 #ifndef SEGMENT_SIZE
122 #define SEGMENT_SIZE getpagesize()
123 #endif
124 #endif
125
126 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
127
128 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
129
130 #ifndef N_DATADDR
131 #define N_DATADDR(x) \
132 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
133 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
134 #endif
135
136 /* Address of bss segment in memory after it is loaded. */
137 #if !defined (N_BSSADDR)
138 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
139 #endif
140
141 #if !defined (N_NLIST_DECLARED)
142 struct nlist {
143 union {
144 char *n_name;
145 struct nlist *n_next;
146 long n_strx;
147 } n_un;
148 unsigned char n_type;
149 char n_other;
150 short n_desc;
151 unsigned long n_value;
152 };
153 #endif /* no N_NLIST_DECLARED. */
154
155 #if !defined (N_UNDF)
156 #define N_UNDF 0
157 #endif
158 #if !defined (N_ABS)
159 #define N_ABS 2
160 #endif
161 #if !defined (N_TEXT)
162 #define N_TEXT 4
163 #endif
164 #if !defined (N_DATA)
165 #define N_DATA 6
166 #endif
167 #if !defined (N_BSS)
168 #define N_BSS 8
169 #endif
170 #if !defined (N_FN)
171 #define N_FN 15
172 #endif
173
174 #if !defined (N_EXT)
175 #define N_EXT 1
176 #endif
177 #if !defined (N_TYPE)
178 #define N_TYPE 036
179 #endif
180 #if !defined (N_STAB)
181 #define N_STAB 0340
182 #endif
183
184 /* The following type indicates the definition of a symbol as being
185 an indirect reference to another symbol. The other symbol
186 appears as an undefined reference, immediately following this symbol.
187
188 Indirection is asymmetrical. The other symbol's value will be used
189 to satisfy requests for the indirect symbol, but not vice versa.
190 If the other symbol does not have a definition, libraries will
191 be searched to find a definition. */
192 #define N_INDR 0xa
193
194 /* The following symbols refer to set elements.
195 All the N_SET[ATDB] symbols with the same name form one set.
196 Space is allocated for the set in the text section, and each set
197 element's value is stored into one word of the space.
198 The first word of the space is the length of the set (number of elements).
199
200 The address of the set is made into an N_SETV symbol
201 whose name is the same as the name of the set.
202 This symbol acts like a N_DATA global symbol
203 in that it can satisfy undefined external references. */
204
205 /* These appear as input to LD, in a .o file. */
206 #define N_SETA 0x14 /* Absolute set element symbol */
207 #define N_SETT 0x16 /* Text set element symbol */
208 #define N_SETD 0x18 /* Data set element symbol */
209 #define N_SETB 0x1A /* Bss set element symbol */
210
211 /* This is output from LD. */
212 #define N_SETV 0x1C /* Pointer to set vector in data area. */
213
214 #if !defined (N_RELOCATION_INFO_DECLARED)
215 /* This structure describes a single relocation to be performed.
216 The text-relocation section of the file is a vector of these structures,
217 all of which apply to the text section.
218 Likewise, the data-relocation section applies to the data section. */
219
220 struct relocation_info
221 {
222 /* Address (within segment) to be relocated. */
223 int r_address;
224 /* The meaning of r_symbolnum depends on r_extern. */
225 unsigned int r_symbolnum:24;
226 /* Nonzero means value is a pc-relative offset
227 and it should be relocated for changes in its own address
228 as well as for changes in the symbol or section specified. */
229 unsigned int r_pcrel:1;
230 /* Length (as exponent of 2) of the field to be relocated.
231 Thus, a value of 2 indicates 1<<2 bytes. */
232 unsigned int r_length:2;
233 /* 1 => relocate with value of symbol.
234 r_symbolnum is the index of the symbol
235 in file's the symbol table.
236 0 => relocate with the address of a segment.
237 r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
238 (the N_EXT bit may be set also, but signifies nothing). */
239 unsigned int r_extern:1;
240 /* Four bits that aren't used, but when writing an object file
241 it is desirable to clear them. */
242 unsigned int r_pad:4;
243 };
244 #endif /* no N_RELOCATION_INFO_DECLARED. */
245
246 #endif /*__ASSEMBLY__ */
247 #endif /* __A_OUT_GNU_H__ */
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