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
|
/* SPDX-License-Identifier: BSD-2-Clause */
/* Copyright 1996-2017 The NASM Authors - All Rights Reserved */
/*
* rdoff.h RDOFF Object File manipulation routines header file
*/
#ifndef RDOFF_H
#define RDOFF_H 1
/*
* RDOFF definitions. They are used by RDOFF utilities and by NASM's
* 'outrdf2.c' output module.
*/
/* RDOFF format revision (currently used only when printing the version) */
#define RDOFF2_REVISION "0.6.1"
/* RDOFF2 file signature */
#define RDOFF2_SIGNATURE "RDOFF2"
/* Maximum size of an import/export label (including trailing zero) */
#define EXIM_LABEL_MAX 256
/* Maximum size of library or module name (including trailing zero) */
#define MODLIB_NAME_MAX 128
/* Maximum number of segments that we can handle in one file */
#define RDF_MAXSEGS 64
/* Record types that may present the RDOFF header */
#define RDFREC_GENERIC 0
#define RDFREC_RELOC 1
#define RDFREC_IMPORT 2
#define RDFREC_GLOBAL 3
#define RDFREC_DLL 4
#define RDFREC_BSS 5
#define RDFREC_SEGRELOC 6
#define RDFREC_FARIMPORT 7
#define RDFREC_MODNAME 8
#define RDFREC_COMMON 10
/*
* Generic record - contains the type and length field, plus a 128 byte
* array 'data'
*/
struct GenericRec {
uint8_t type;
uint8_t reclen;
char data[128];
};
/*
* Relocation record
*/
struct RelocRec {
uint8_t type; /* must be 1 */
uint8_t reclen; /* content length */
uint8_t segment; /* only 0 for code, or 1 for data supported,
but add 64 for relative refs (ie do not require
reloc @ loadtime, only linkage) */
int32_t offset; /* from start of segment in which reference is loc'd */
uint8_t length; /* 1 2 or 4 bytes */
uint16_t refseg; /* segment to which reference refers to */
};
/*
* Extern/import record
*/
struct ImportRec {
uint8_t type; /* must be 2 */
uint8_t reclen; /* content length */
uint8_t flags; /* SYM_* flags (see below) */
uint16_t segment; /* segment number allocated to the label for reloc
records - label is assumed to be at offset zero
in this segment, so linker must fix up with offset
of segment and of offset within segment */
char label[EXIM_LABEL_MAX]; /* zero terminated, should be written to file
until the zero, but not after it */
};
/*
* Public/export record
*/
struct ExportRec {
uint8_t type; /* must be 3 */
uint8_t reclen; /* content length */
uint8_t flags; /* SYM_* flags (see below) */
uint8_t segment; /* segment referred to (0/1/2) */
int32_t offset; /* offset within segment */
char label[EXIM_LABEL_MAX]; /* zero terminated as in import */
};
/*
* DLL record
*/
struct DLLRec {
uint8_t type; /* must be 4 */
uint8_t reclen; /* content length */
char libname[MODLIB_NAME_MAX]; /* name of library to link with at load time */
};
/*
* BSS record
*/
struct BSSRec {
uint8_t type; /* must be 5 */
uint8_t reclen; /* content length */
int32_t amount; /* number of bytes BSS to reserve */
};
/*
* Module name record
*/
struct ModRec {
uint8_t type; /* must be 8 */
uint8_t reclen; /* content length */
char modname[MODLIB_NAME_MAX]; /* module name */
};
/*
* Common variable record
*/
struct CommonRec {
uint8_t type; /* must be 10 */
uint8_t reclen; /* equals 7+label length */
uint16_t segment; /* segment number */
int32_t size; /* size of common variable */
uint16_t align; /* alignment (power of two) */
char label[EXIM_LABEL_MAX]; /* zero terminated as in import */
};
/* Flags for ExportRec */
#define SYM_DATA 1
#define SYM_FUNCTION 2
#define SYM_GLOBAL 4
#define SYM_IMPORT 8
#endif /* RDOFF_H */
|
