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
|
#ifndef LINUXELF_H
#define LINUXELF_H
#include <ld_sysdep.h> /* before elf.h to get ELF_USES_RELOCA right */
#include <elf.h>
#include <link.h>
#ifdef DEBUG
# define LDSO_CONF "../util/ld.so.conf"
# define LDSO_CACHE "../util/ld.so.cache"
# define LDSO_PRELOAD "../util/ld.so.preload"
#else
# define LDSO_CONF UCLIBC_RUNTIME_PREFIX "etc/ld.so.conf"
# define LDSO_CACHE UCLIBC_RUNTIME_PREFIX "etc/ld.so.cache"
# define LDSO_PRELOAD UCLIBC_RUNTIME_PREFIX "etc/ld.so.preload"
#endif
#define LIB_ANY -1
#define LIB_DLL 0
#define LIB_ELF 1
#define LIB_ELF64 0x80
#define LIB_ELF_LIBC5 2
#define LIB_ELF_LIBC6 3
#define LIB_ELF_LIBC0 4
/* Forward declarations for stuff defined in ld_hash.h */
struct dyn_elf;
struct elf_resolve;
/* Definitions and prototypes for cache stuff */
#ifdef USE_CACHE
extern int _dl_map_cache(void);
extern int _dl_unmap_cache(void);
#define LDSO_CACHE_MAGIC "ld.so-"
#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
#define LDSO_CACHE_VER "1.7.0"
#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
typedef struct {
char magic [LDSO_CACHE_MAGIC_LEN];
char version [LDSO_CACHE_VER_LEN];
int nlibs;
} header_t;
typedef struct {
int flags;
int sooffset;
int liboffset;
} libentry_t;
#else
static inline void _dl_map_cache(void) { }
static inline void _dl_unmap_cache(void) { }
#endif
/* Function prototypes for non-static stuff in readelflib1.c */
extern int _dl_parse_copy_information(struct dyn_elf *rpnt,
unsigned long rel_addr, unsigned long rel_size, int type);
extern void _dl_parse_lazy_relocation_information(struct elf_resolve *tpnt,
unsigned long rel_addr, unsigned long rel_size, int type);
extern int _dl_parse_relocation_information(struct elf_resolve *tpnt,
unsigned long rel_addr, unsigned long rel_size, int type);
extern struct elf_resolve * _dl_load_shared_library(int secure,
struct dyn_elf **rpnt, struct elf_resolve *tpnt, char *full_libname);
extern struct elf_resolve * _dl_load_elf_shared_library(int secure,
struct dyn_elf **rpnt, char *libname);
extern struct elf_resolve *_dl_check_if_named_library_is_loaded(const char *full_libname);
extern int _dl_linux_resolve(void);
/*
* Datatype of a relocation on this platform
*/
#ifdef ELF_USES_RELOCA
# define ELF_RELOC ElfW(Rela)
# define DT_RELOC_TABLE_ADDR DT_RELA
# define DT_RELOC_TABLE_SIZE DT_RELASZ
# define UNSUPPORTED_RELOC_TYPE DT_REL
# define UNSUPPORTED_RELOC_STR "REL"
#else
# define ELF_RELOC ElfW(Rel)
# define DT_RELOC_TABLE_ADDR DT_REL
# define DT_RELOC_TABLE_SIZE DT_RELSZ
# define UNSUPPORTED_RELOC_TYPE DT_RELA
# define UNSUPPORTED_RELOC_STR "RELA"
#endif
/* Convert between the Linux flags for page protections and the
ones specified in the ELF standard. */
#define LXFLAGS(X) ( (((X) & PF_R) ? PROT_READ : 0) | \
(((X) & PF_W) ? PROT_WRITE : 0) | \
(((X) & PF_X) ? PROT_EXEC : 0))
#endif /* LINUXELF_H */
|
