1 /* vi: set sw=4 ts=4: */
3 * Copyright (C) 2000-2006 by Erik Andersen <andersen@codepoet.org>
5 * GNU Lesser General Public License version 2.1 or later.
12 #define RTLD_NEXT ((void*)-1)
16 struct elf_resolve **init_fini;
17 unsigned long nlist; /* Number of entries in init_fini */
21 struct elf_resolve * dyn;
22 struct dyn_elf * next_handle; /* Used by dlopen et al. */
23 struct init_fini init_fini;
24 struct dyn_elf * next;
25 struct dyn_elf * prev;
30 struct elf_resolve *tpnt;
33 /* Structure to describe a single list of scope elements. The lookup
34 functions get passed an array of pointers to such structures. */
36 struct elf_resolve **r_list; /* Array of maps for the scope. */
37 unsigned int r_nlist; /* Number of entries in the scope. */
38 struct r_scope_elem *next;
42 /* These entries must be in this order to be compatible with the interface used
43 by gdb to obtain the list of symbols. */
44 DL_LOADADDR_TYPE loadaddr; /* Base address shared object is loaded at. */
45 char *libname; /* Absolute file name object was found in. */
46 ElfW(Dyn) *dynamic_addr; /* Dynamic section of the shared object. */
47 struct elf_resolve * next;
48 struct elf_resolve * prev;
49 /* Nothing after this address is used by gdb. */
51 #if defined(USE_TLS) && USE_TLS
52 /* Thread-local storage related info. */
54 /* Start of the initialization image. */
55 void *l_tls_initimage;
56 /* Size of the initialization image. */
57 size_t l_tls_initimage_size;
58 /* Size of the TLS block. */
59 size_t l_tls_blocksize;
60 /* Alignment requirement of the TLS block. */
62 /* Offset of first byte module alignment. */
63 size_t l_tls_firstbyte_offset;
64 # ifndef NO_TLS_OFFSET
65 # define NO_TLS_OFFSET 0
67 /* For objects present at startup time: offset in the static TLS block. */
68 ptrdiff_t l_tls_offset;
69 /* Index of the module in the dtv array. */
71 /* Nonzero if _dl_init_static_tls should be called for this module */
72 unsigned int l_need_tls_init:1;
76 #ifdef __LDSO_STANDALONE_SUPPORT__
77 /* Store the entry point from the ELF header (e_entry) */
80 enum {elf_lib, elf_executable,program_interpreter, loaded_file} libtype;
81 /* This is the local scope of the shared object */
82 struct r_scope_elem symbol_scope;
83 unsigned short usage_count;
84 unsigned short int init_flag;
85 unsigned long rtld_flags; /* RTLD_GLOBAL, RTLD_NOW etc. */
88 #ifdef __LDSO_GNU_HASH_SUPPORT__
89 /* Data needed to support GNU hash style */
90 Elf32_Word l_gnu_bitmask_idxbits;
91 Elf32_Word l_gnu_shift;
92 const ElfW(Addr) *l_gnu_bitmask;
96 const Elf32_Word *l_gnu_chain_zero;
97 const Elf_Symndx *elf_buckets;
100 Elf_Symndx *elf_buckets;
103 struct init_fini_list *init_fini;
104 struct init_fini_list *rtld_local; /* keep tack of RTLD_LOCAL libs in same group */
106 * These are only used with ELF style shared libraries
110 #ifdef __LDSO_GNU_HASH_SUPPORT__
113 const Elf32_Word *l_gnu_buckets;
114 const Elf_Symndx *chains;
119 unsigned long dynamic_info[DYNAMIC_SIZE];
121 unsigned long n_phent;
124 ElfW(Addr) relro_addr;
127 dev_t st_dev; /* device */
128 ino_t st_ino; /* inode */
131 /* this is used to store the address of relocation data words, so
132 * we don't have to calculate it every time, which requires a divide */
133 unsigned long data_words;
137 /* Every loaded module holds a hashtable of function descriptors of
138 functions defined in it, such that it's easy to release the
139 memory when the module is dlclose()d. */
140 struct funcdesc_ht *funcdesc_ht;
143 /* Information for DSBT */
145 unsigned long dsbt_size;
146 unsigned long dsbt_index;
150 #define RELOCS_DONE 0x000001
151 #define JMP_RELOCS_DONE 0x000002
152 #define INIT_FUNCS_CALLED 0x000004
153 #define FINI_FUNCS_CALLED 0x000008
154 #define DL_OPENED 0x000010
155 #define DL_RESERVED 0x000020
157 extern struct dyn_elf * _dl_symbol_tables;
158 extern struct elf_resolve * _dl_loaded_modules;
159 extern struct dyn_elf * _dl_handles;
161 extern struct elf_resolve * _dl_add_elf_hash_table(const char * libname,
162 DL_LOADADDR_TYPE loadaddr, unsigned long * dynamic_info,
163 unsigned long dynamic_addr, unsigned long dynamic_size);
165 extern char *_dl_find_hash(const char *name, struct r_scope_elem *scope,
166 struct elf_resolve *mytpnt, int type_class,
167 struct symbol_ref *symbol);
169 extern char * _dl_library_path;
171 #define LD_ERROR_NOFILE 1
172 #define LD_ERROR_NOZERO 2
173 #define LD_ERROR_NOTELF 3
174 #define LD_ERROR_NOTMAGIC 4
175 #define LD_ERROR_NOTDYN 5
176 #define LD_ERROR_MMAP_FAILED 6
177 #define LD_ERROR_NODYNAMIC 7
178 #define LD_ERROR_TLS_FAILED 8
179 #define LD_WRONG_RELOCS 9
180 #define LD_BAD_HANDLE 10
181 #define LD_NO_SYMBOL 11
183 #endif /* _DL_HASH_H */