2 * Copyright (C) 2008 The Android Open Source Project
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/types.h>
34 #include <linux/elf.h>
38 #define PAGE_SIZE 4096
39 #define PAGE_MASK 4095
42 const char *addr_to_name(unsigned addr
);
44 /* magic shared structures that GDB knows about */
51 struct link_map
* l_next
;
52 struct link_map
* l_prev
;
55 /* needed for dl_iterate_phdr to be passed to the callbacks provided */
59 const char *dlpi_name
;
60 const Elf32_Phdr
*dlpi_phdr
;
61 Elf32_Half dlpi_phnum
;
65 // Values for r_debug->state
75 struct link_map
* r_map
;
81 typedef struct soinfo soinfo
;
83 #define FLAG_LINKED 0x00000001
84 #define FLAG_ERROR 0x00000002
85 #define FLAG_EXE 0x00000004 // The main executable
86 #define FLAG_PRELINKED 0x00000008 // This is a pre-linked lib
88 #define SOINFO_NAME_LEN 128
92 const char name
[SOINFO_NAME_LEN
];
98 // buddy-allocator index, negative for prelinked libraries
103 unsigned wrprotect_start
;
104 unsigned wrprotect_end
;
120 unsigned plt_rel_count
;
125 #ifdef ANDROID_SH_LINKER
126 Elf32_Rela
*plt_rela
;
127 unsigned plt_rela_count
;
131 #endif /* ANDROID_SH_LINKER */
133 unsigned *preinit_array
;
134 unsigned preinit_array_count
;
136 unsigned *init_array
;
137 unsigned init_array_count
;
138 unsigned *fini_array
;
139 unsigned fini_array_count
;
141 void (*init_func
)(void);
142 void (*fini_func
)(void);
144 #ifdef ANDROID_ARM_LINKER
145 /* ARM EABI section used for stack unwinding. */
147 unsigned ARM_exidx_count
;
151 struct link_map linkmap
;
155 extern soinfo libdl_info
;
157 /* these must all be powers of two */
159 #define LIBBASE 0x60000000
160 #define LIBLAST 0x70000000
161 #define LIBINC 0x00100000
163 #define LIBBASE 0x70000000
164 #define LIBLAST 0x80000000
165 #define LIBINC 0x00100000
168 #ifdef ANDROID_ARM_LINKER
170 #define R_ARM_COPY 20
171 #define R_ARM_GLOB_DAT 21
172 #define R_ARM_JUMP_SLOT 22
173 #define R_ARM_RELATIVE 23
175 /* According to the AAPCS specification, we only
176 * need the above relocations. However, in practice,
177 * the following ones turn up from time to time.
179 #define R_ARM_ABS32 2
180 #define R_ARM_REL32 3
182 #elif defined(ANDROID_X86_LINKER)
186 #define R_386_GLOB_DAT 6
187 #define R_386_JUMP_SLOT 7
188 #define R_386_RELATIVE 8
190 #elif defined(ANDROID_SH_LINKER)
193 #define R_SH_GLOB_DAT 163
194 #define R_SH_JUMP_SLOT 164
195 #define R_SH_RELATIVE 165
197 #endif /* ANDROID_*_LINKER */
200 #ifndef DT_INIT_ARRAY
201 #define DT_INIT_ARRAY 25
204 #ifndef DT_FINI_ARRAY
205 #define DT_FINI_ARRAY 26
208 #ifndef DT_INIT_ARRAYSZ
209 #define DT_INIT_ARRAYSZ 27
212 #ifndef DT_FINI_ARRAYSZ
213 #define DT_FINI_ARRAYSZ 28
216 #ifndef DT_PREINIT_ARRAY
217 #define DT_PREINIT_ARRAY 32
220 #ifndef DT_PREINIT_ARRAYSZ
221 #define DT_PREINIT_ARRAYSZ 33
224 soinfo
*find_library(const char *name
);
225 soinfo
*find_mapped_library(const char *name
, int fd
,
226 void *mem
, size_t len
, size_t offset
);
227 unsigned unload_library(soinfo
*si
);
228 Elf32_Sym
*lookup_in_library(soinfo
*si
, const char *name
);
229 Elf32_Sym
*lookup(const char *name
, soinfo
**found
, soinfo
*start
);
230 soinfo
*find_containing_library(void *addr
);
231 Elf32_Sym
*find_containing_symbol(void *addr
, soinfo
*si
);
232 const char *linker_get_error(void);
233 void simple_linker_init(void);
235 #ifdef ANDROID_ARM_LINKER
236 typedef long unsigned int *_Unwind_Ptr
;
237 _Unwind_Ptr
dl_unwind_find_exidx(_Unwind_Ptr pc
, int *pcount
);
238 #elif defined(ANDROID_X86_LINKER) || defined(ANDROID_SH_LINKER)
239 int dl_iterate_phdr(int (*cb
)(struct dl_phdr_info
*, size_t, void *), void *);