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 #ifndef __ASSEMBLY__
13 
14 /* these go in the N_MACHTYPE field */
15 enum machine_type {
16 #if defined (M_OLDSUN2)
17   M__OLDSUN2 = M_OLDSUN2,
18 #else
19   M_OLDSUN2 = 0,
20 #endif
21 #if defined (M_68010)
22   M__68010 = M_68010,
23 #else
24   M_68010 = 1,
25 #endif
26 #if defined (M_68020)
27   M__68020 = M_68020,
28 #else
29   M_68020 = 2,
30 #endif
31 #if defined (M_SPARC)
32   M__SPARC = M_SPARC,
33 #else
34   M_SPARC = 3,
35 #endif
36   /* skip a bunch so we don't run into any of sun's numbers */
37   M_386 = 100,
38   M_MIPS1 = 151,	/* MIPS R3000/R3000 binary */
39   M_MIPS2 = 152		/* MIPS R6000/R4000 binary */
40 };
41 
42 #if !defined (N_MAGIC)
43 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
44 #endif
45 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
46 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
47 #define N_SET_INFO(exec, magic, type, flags) \
48 	((exec).a_info = ((magic) & 0xffff) \
49 	 | (((int)(type) & 0xff) << 16) \
50 	 | (((flags) & 0xff) << 24))
51 #define N_SET_MAGIC(exec, magic) \
52 	((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
53 
54 #define N_SET_MACHTYPE(exec, machtype) \
55 	((exec).a_info = \
56 	 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
57 
58 #define N_SET_FLAGS(exec, flags) \
59 	((exec).a_info = \
60 	 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
61 
62 /* Code indicating object file or impure executable.  */
63 #define OMAGIC 0407
64 /* Code indicating pure executable.  */
65 #define NMAGIC 0410
66 /* Code indicating demand-paged executable.  */
67 #define ZMAGIC 0413
68 /* This indicates a demand-paged executable with the header in the text.
69    The first page is unmapped to help trap NULL pointer references */
70 #define QMAGIC 0314
71 
72 /* Code indicating core file.  */
73 #define CMAGIC 0421
74 
75 #if !defined (N_BADMAG)
76 #define N_BADMAG(x)	  (N_MAGIC(x) != OMAGIC		\
77 			&& N_MAGIC(x) != NMAGIC		\
78   			&& N_MAGIC(x) != ZMAGIC \
79 		        && N_MAGIC(x) != QMAGIC)
80 #endif
81 
82 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
83 
84 #if !defined (N_TXTOFF)
85 #define N_TXTOFF(x) \
86  (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
87   (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
88 #endif
89 
90 #if !defined (N_DATOFF)
91 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
92 #endif
93 
94 #if !defined (N_TRELOFF)
95 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
96 #endif
97 
98 #if !defined (N_DRELOFF)
99 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
100 #endif
101 
102 #if !defined (N_SYMOFF)
103 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
104 #endif
105 
106 #if !defined (N_STROFF)
107 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
108 #endif
109 
110 /* Address of text segment in memory after it is loaded.  */
111 #if !defined (N_TXTADDR)
112 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
113 #endif
114 
115 /* Address of data segment in memory after it is loaded.
116    Note that it is up to you to define SEGMENT_SIZE
117    on machines not listed here.  */
118 #if defined(vax) || defined(hp300) || defined(pyr)
119 #define SEGMENT_SIZE page_size
120 #endif
121 #ifdef	sony
122 #define	SEGMENT_SIZE	0x2000
123 #endif	/* Sony.  */
124 #ifdef is68k
125 #define SEGMENT_SIZE 0x20000
126 #endif
127 #if defined(m68k) && defined(PORTAR)
128 #define PAGE_SIZE 0x400
129 #define SEGMENT_SIZE PAGE_SIZE
130 #endif
131 
132 #ifdef linux
133 #ifdef __KERNEL__
134 #include <asm/page.h>
135 #else
136 #include <unistd.h>
137 #endif
138 #if defined(__i386__) || defined(__mc68000__)
139 #define SEGMENT_SIZE	1024
140 #else
141 #ifndef SEGMENT_SIZE
142 #ifdef __KERNEL__
143 #define SEGMENT_SIZE	PAGE_SIZE
144 #else
145 #define SEGMENT_SIZE   getpagesize()
146 #endif
147 #endif
148 #endif
149 #endif
150 
151 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
152 
153 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
154 
155 #ifndef N_DATADDR
156 #define N_DATADDR(x) \
157     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
158      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
159 #endif
160 
161 /* Address of bss segment in memory after it is loaded.  */
162 #if !defined (N_BSSADDR)
163 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
164 #endif
165 
166 #if !defined (N_NLIST_DECLARED)
167 struct nlist {
168   union {
169     char *n_name;
170     struct nlist *n_next;
171     long n_strx;
172   } n_un;
173   unsigned char n_type;
174   char n_other;
175   short n_desc;
176   unsigned long n_value;
177 };
178 #endif /* no N_NLIST_DECLARED.  */
179 
180 #if !defined (N_UNDF)
181 #define N_UNDF 0
182 #endif
183 #if !defined (N_ABS)
184 #define N_ABS 2
185 #endif
186 #if !defined (N_TEXT)
187 #define N_TEXT 4
188 #endif
189 #if !defined (N_DATA)
190 #define N_DATA 6
191 #endif
192 #if !defined (N_BSS)
193 #define N_BSS 8
194 #endif
195 #if !defined (N_FN)
196 #define N_FN 15
197 #endif
198 
199 #if !defined (N_EXT)
200 #define N_EXT 1
201 #endif
202 #if !defined (N_TYPE)
203 #define N_TYPE 036
204 #endif
205 #if !defined (N_STAB)
206 #define N_STAB 0340
207 #endif
208 
209 /* The following type indicates the definition of a symbol as being
210    an indirect reference to another symbol.  The other symbol
211    appears as an undefined reference, immediately following this symbol.
212 
213    Indirection is asymmetrical.  The other symbol's value will be used
214    to satisfy requests for the indirect symbol, but not vice versa.
215    If the other symbol does not have a definition, libraries will
216    be searched to find a definition.  */
217 #define N_INDR 0xa
218 
219 /* The following symbols refer to set elements.
220    All the N_SET[ATDB] symbols with the same name form one set.
221    Space is allocated for the set in the text section, and each set
222    element's value is stored into one word of the space.
223    The first word of the space is the length of the set (number of elements).
224 
225    The address of the set is made into an N_SETV symbol
226    whose name is the same as the name of the set.
227    This symbol acts like a N_DATA global symbol
228    in that it can satisfy undefined external references.  */
229 
230 /* These appear as input to LD, in a .o file.  */
231 #define	N_SETA	0x14		/* Absolute set element symbol */
232 #define	N_SETT	0x16		/* Text set element symbol */
233 #define	N_SETD	0x18		/* Data set element symbol */
234 #define	N_SETB	0x1A		/* Bss set element symbol */
235 
236 /* This is output from LD.  */
237 #define N_SETV	0x1C		/* Pointer to set vector in data area.  */
238 
239 #if !defined (N_RELOCATION_INFO_DECLARED)
240 /* This structure describes a single relocation to be performed.
241    The text-relocation section of the file is a vector of these structures,
242    all of which apply to the text section.
243    Likewise, the data-relocation section applies to the data section.  */
244 
245 struct relocation_info
246 {
247   /* Address (within segment) to be relocated.  */
248   int r_address;
249   /* The meaning of r_symbolnum depends on r_extern.  */
250   unsigned int r_symbolnum:24;
251   /* Nonzero means value is a pc-relative offset
252      and it should be relocated for changes in its own address
253      as well as for changes in the symbol or section specified.  */
254   unsigned int r_pcrel:1;
255   /* Length (as exponent of 2) of the field to be relocated.
256      Thus, a value of 2 indicates 1<<2 bytes.  */
257   unsigned int r_length:2;
258   /* 1 => relocate with value of symbol.
259           r_symbolnum is the index of the symbol
260 	  in file's the symbol table.
261      0 => relocate with the address of a segment.
262           r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
263 	  (the N_EXT bit may be set also, but signifies nothing).  */
264   unsigned int r_extern:1;
265   /* Four bits that aren't used, but when writing an object file
266      it is desirable to clear them.  */
267 #ifdef NS32K
268   unsigned r_bsr:1;
269   unsigned r_disp:1;
270   unsigned r_pad:2;
271 #else
272   unsigned int r_pad:4;
273 #endif
274 };
275 #endif /* no N_RELOCATION_INFO_DECLARED.  */
276 
277 #endif /*__ASSEMBLY__ */
278 #endif /* __A_OUT_GNU_H__ */
279