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
|
#ifndef _LD_HASH_H_
#define _LD_HASH_H_
#ifndef RTLD_NEXT
#define RTLD_NEXT ((void*)-1)
#endif
struct dyn_elf{
unsigned long flags;
struct elf_resolve * dyn;
struct dyn_elf * next_handle; /* Used by dlopen et al. */
struct dyn_elf * next;
struct dyn_elf * prev;
};
struct elf_resolve{
/* These entries must be in this order to be compatible with the interface used
by gdb to obtain the list of symbols. */
ElfW(Addr) loadaddr; /* Base address shared object is loaded at. */
char *libname; /* Absolute file name object was found in. */
ElfW(Dyn) *dynamic_addr; /* Dynamic section of the shared object. */
struct elf_resolve * next;
struct elf_resolve * prev;
/* Nothing after this address is used by gdb. */
enum {elf_lib, elf_executable,program_interpreter, loaded_file} libtype;
struct dyn_elf * symbol_scope;
unsigned short usage_count;
unsigned short int init_flag;
unsigned int nbucket;
unsigned long * elf_buckets;
/*
* These are only used with ELF style shared libraries
*/
unsigned long nchain;
unsigned long * chains;
unsigned long dynamic_info[24];
unsigned long dynamic_size;
unsigned long n_phent;
Elf32_Phdr * ppnt;
#if defined(__mips__)
/* Needed for MIPS relocation */
unsigned long mips_gotsym;
unsigned long mips_local_gotno;
unsigned long mips_symtabno;
#endif
#ifdef __powerpc__
/* this is used to store the address of relocation data words, so
* we don't have to calculate it every time, which requires a divide */
unsigned long data_words;
#endif
};
#define COPY_RELOCS_DONE 1
#define RELOCS_DONE 2
#define JMP_RELOCS_DONE 4
#define INIT_FUNCS_CALLED 8
extern struct dyn_elf * _dl_symbol_tables;
extern struct elf_resolve * _dl_loaded_modules;
extern struct dyn_elf * _dl_handles;
extern struct elf_resolve * _dl_check_hashed_files(const char * libname);
extern struct elf_resolve * _dl_add_elf_hash_table(const char * libname,
char * loadaddr, unsigned long * dynamic_info,
unsigned long dynamic_addr, unsigned long dynamic_size);
enum caller_type{symbolrel=0,copyrel=1,resolver=2};
extern char * _dl_find_hash(const char * name, struct dyn_elf * rpnt1,
struct elf_resolve * f_tpnt, enum caller_type);
extern int _dl_linux_dynamic_link(void);
extern char * _dl_library_path;
extern char * _dl_not_lazy;
extern unsigned long _dl_elf_hash(const unsigned char *name);
static inline int _dl_symbol(char * name)
{
if(name[0] != '_' || name[1] != 'd' || name[2] != 'l' || name[3] != '_')
return 0;
return 1;
}
#define LD_ERROR_NOFILE 1
#define LD_ERROR_NOZERO 2
#define LD_ERROR_NOTELF 3
#define LD_ERROR_NOTMAGIC 4
#define LD_ERROR_NOTDYN 5
#define LD_ERROR_MMAP_FAILED 6
#define LD_ERROR_NODYNAMIC 7
#define LD_WRONG_RELOCS 8
#define LD_BAD_HANDLE 9
#define LD_NO_SYMBOL 10
#endif /* _LD_HASH_H_ */
|
