1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__
#include <bits/a.out.h>
#define __GNU_EXEC_MACROS__
struct exec
{
unsigned char a_dynamic:1; /* A __DYNAMIC is in this image. */
unsigned char a_toolversion:7;
unsigned char a_machtype;
unsigned short a_info;
unsigned int a_text; /* Length of text, in bytes. */
unsigned int a_data; /* Length of data, in bytes. */
unsigned int a_bss; /* Length of bss, in bytes. */
unsigned int a_syms; /* Length of symbol table, in bytes. */
unsigned int a_entry; /* Where program begins. */
unsigned int a_trsize;
unsigned int a_drsize;
};
enum machine_type
{
M_OLDSUN2 = 0,
M_68010 = 1,
M_68020 = 2,
M_SPARC = 3,
M_386 = 100,
M_MIPS1 = 151,
M_MIPS2 = 152
};
#define N_MAGIC(exec) ((exec).a_info & 0xffff)
#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
#define N_SET_INFO(exec, magic, type, flags) \
((exec).a_info = ((magic) & 0xffff) \
| (((int)(type) & 0xff) << 16) \
| (((flags) & 0xff) << 24))
#define N_SET_MAGIC(exec, magic) \
((exec).a_info = ((exec).a_info & 0xffff0000) | ((magic) & 0xffff))
#define N_SET_MACHTYPE(exec, machtype) \
((exec).a_info = \
((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
#define N_SET_FLAGS(exec, flags) \
((exec).a_info = \
((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
/* Code indicating object file or impure executable. */
#define OMAGIC 0407
/* Code indicating pure executable. */
#define NMAGIC 0410
/* Code indicating demand-paged executable. */
#define ZMAGIC 0413
/* This indicates a demand-paged executable with the header in the text.
The first page is unmapped to help trap NULL pointer references. */
#define QMAGIC 0314
/* Code indicating core file. */
#define CMAGIC 0421
#define N_TRSIZE(a) ((a).a_trsize)
#define N_DRSIZE(a) ((a).a_drsize)
#define N_SYMSIZE(a) ((a).a_syms)
#define N_BADMAG(x) \
(N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
&& N_MAGIC(x) != ZMAGIC && N_MAGIC(x) != QMAGIC)
#define _N_HDROFF(x) (1024 - sizeof (struct exec))
#define N_TXTOFF(x) \
(N_MAGIC(x) == ZMAGIC ? 0 : sizeof (struct exec))
#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
#define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
#define N_DRELOFF(x) (N_TRELOFF(x) + N_TRSIZE(x))
#define N_SYMOFF(x) \
(N_TXTOFF(x) + (x).a_text + (x).a_data + (x).a_trsize + (x).a_drsize)
#define N_STROFF(x) (N_SYMOFF(x) + N_SYMSIZE(x))
#define SPARC_PGSIZE 0x2000
/* Address of text segment in memory after it is loaded. */
#define N_TXTADDR(x) \
(unsigned long)(((N_MAGIC(x) == ZMAGIC) && ((x).a_entry < SPARC_PGSIZE)) \
? 0 : SPARC_PGSIZE)
/* Address of data segment in memory after it is loaded. */
#define SEGMENT_SIZE SPARC_PGSIZE
#define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
#define N_DATADDR(x) \
(N_MAGIC(x)==OMAGIC \
? (N_TXTADDR(x) + (x).a_text) \
: (unsigned long)(_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
#if !defined (N_NLIST_DECLARED)
struct nlist
{
union
{
char *n_name;
struct nlist *n_next;
long n_strx;
} n_un;
unsigned char n_type;
char n_other;
short n_desc;
unsigned long n_value;
};
#endif /* no N_NLIST_DECLARED. */
#define N_UNDF 0
#define N_ABS 2
#define N_TEXT 4
#define N_DATA 6
#define N_BSS 8
#define N_FN 15
#define N_EXT 1
#define N_TYPE 036
#define N_STAB 0340
#define N_INDR 0xa
#define N_SETA 0x14 /* Absolute set element symbol. */
#define N_SETT 0x16 /* Text set element symbol. */
#define N_SETD 0x18 /* Data set element symbol. */
#define N_SETB 0x1A /* Bss set element symbol. */
#define N_SETV 0x1C /* Pointer to set vector in data area. */
#if !defined (N_RELOCATION_INFO_DECLARED)
enum reloc_type
{
RELOC_8,
RELOC_16,
RELOC_32,
RELOC_DISP8,
RELOC_DISP16,
RELOC_DISP32,
RELOC_WDISP30,
RELOC_WDISP22,
RELOC_HI22,
RELOC_22,
RELOC_13,
RELOC_LO10,
RELOC_SFA_BASE,
RELOC_SFA_OFF13,
RELOC_BASE10,
RELOC_BASE13,
RELOC_BASE22,
RELOC_PC10,
RELOC_PC22,
RELOC_JMP_TBL,
RELOC_SEGOFF16,
RELOC_GLOB_DAT,
RELOC_JMP_SLOT,
RELOC_RELATIVE
};
/* This structure describes a single relocation to be performed.
The text-relocation section of the file is a vector of these structures,
all of which apply to the text section.
Likewise, the data-relocation section applies to the data section. */
struct relocation_info
{
unsigned int r_address;
unsigned int r_index:24;
unsigned int r_extern:1;
int r_pad:2;
enum reloc_type r_type:5;
int r_addend;
};
#endif /* no N_RELOCATION_INFO_DECLARED. */
#endif /* __A_OUT_GNU_H__ */
|
