glibc (2.38)
1 #ifndef __A_OUT_GNU_H__
2 #define __A_OUT_GNU_H__
3
4 #include <bits/a.out.h>
5
6 #define __GNU_EXEC_MACROS__
7
8 struct exec
9 {
10 unsigned long a_info; /* Use macros N_MAGIC, etc for access. */
11 unsigned int a_text; /* Length of text, in bytes. */
12 unsigned int a_data; /* Length of data, in bytes. */
13 unsigned int a_bss; /* Length of uninitialized data area for file, in bytes. */
14 unsigned int a_syms; /* Length of symbol table data in file, in bytes. */
15 unsigned int a_entry; /* Start address. */
16 unsigned int a_trsize;/* Length of relocation info for text, in bytes. */
17 unsigned int a_drsize;/* Length of relocation info for data, in bytes. */
18 };
19
20 enum machine_type
21 {
22 M_OLDSUN2 = 0,
23 M_68010 = 1,
24 M_68020 = 2,
25 M_SPARC = 3,
26 M_386 = 100,
27 M_MIPS1 = 151,
28 M_MIPS2 = 152
29 };
30
31 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
32 #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
33 #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
34 #define N_SET_INFO(exec, magic, type, flags) \
35 ((exec).a_info = ((magic) & 0xffff) \
36 | (((int)(type) & 0xff) << 16) \
37 | (((flags) & 0xff) << 24))
38 #define N_SET_MAGIC(exec, magic) \
39 ((exec).a_info = ((exec).a_info & 0xffff0000) | ((magic) & 0xffff))
40 #define N_SET_MACHTYPE(exec, machtype) \
41 ((exec).a_info = \
42 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
43 #define N_SET_FLAGS(exec, flags) \
44 ((exec).a_info = \
45 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
46
47 /* Code indicating object file or impure executable. */
48 #define OMAGIC 0407
49 /* Code indicating pure executable. */
50 #define NMAGIC 0410
51 /* Code indicating demand-paged executable. */
52 #define ZMAGIC 0413
53 /* This indicates a demand-paged executable with the header in the text.
54 The first page is unmapped to help trap NULL pointer references. */
55 #define QMAGIC 0314
56 /* Code indicating core file. */
57 #define CMAGIC 0421
58
59 #define N_TRSIZE(a) ((a).a_trsize)
60 #define N_DRSIZE(a) ((a).a_drsize)
61 #define N_SYMSIZE(a) ((a).a_syms)
62 #define N_BADMAG(x) \
63 (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
64 && N_MAGIC(x) != ZMAGIC && N_MAGIC(x) != QMAGIC)
65 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
66 #define N_TXTOFF(x) \
67 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) \
68 : (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
69 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
70 #define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
71 #define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
72 #define N_SYMOFF(x) (N_DRELOFF(x) + N_DRSIZE(x))
73 #define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
74
75 /* Address of text segment in memory after it is loaded. */
76 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? 4096 : 0)
77
78 /* Address of data segment in memory after it is loaded. */
79 #define SEGMENT_SIZE 1024
80
81 #define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
82 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
83
84 #define N_DATADDR(x) \
85 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
86 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
87 #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
88
89 #if !defined (N_NLIST_DECLARED)
90 struct nlist
91 {
92 union
93 {
94 char *n_name;
95 struct nlist *n_next;
96 long n_strx;
97 } n_un;
98 unsigned char n_type;
99 char n_other;
100 short n_desc;
101 unsigned long n_value;
102 };
103 #endif /* no N_NLIST_DECLARED. */
104
105 #define N_UNDF 0
106 #define N_ABS 2
107 #define N_TEXT 4
108 #define N_DATA 6
109 #define N_BSS 8
110 #define N_FN 15
111 #define N_EXT 1
112 #define N_TYPE 036
113 #define N_STAB 0340
114 #define N_INDR 0xa
115 #define N_SETA 0x14 /* Absolute set element symbol. */
116 #define N_SETT 0x16 /* Text set element symbol. */
117 #define N_SETD 0x18 /* Data set element symbol. */
118 #define N_SETB 0x1A /* Bss set element symbol. */
119 #define N_SETV 0x1C /* Pointer to set vector in data area. */
120
121 #if !defined (N_RELOCATION_INFO_DECLARED)
122 /* This structure describes a single relocation to be performed.
123 The text-relocation section of the file is a vector of these structures,
124 all of which apply to the text section.
125 Likewise, the data-relocation section applies to the data section. */
126
127 struct relocation_info
128 {
129 int r_address;
130 unsigned int r_symbolnum:24;
131 unsigned int r_pcrel:1;
132 unsigned int r_length:2;
133 unsigned int r_extern:1;
134 unsigned int r_pad:4;
135 };
136 #endif /* no N_RELOCATION_INFO_DECLARED. */
137
138 #endif /* __A_OUT_GNU_H__ */
Browse
Usage
Versions