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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) ALIGN(x, SEGMENT_SIZE)
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