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>
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_LINKER 0x00000010 // The linker itself
88 #define SOINFO_NAME_LEN 128
92 const char name
[SOINFO_NAME_LEN
];
99 int unused
; // DO NOT USE, maintained for compatibility.
103 unsigned wrprotect_start
;
104 unsigned wrprotect_end
;
120 unsigned plt_rel_count
;
125 unsigned *preinit_array
;
126 unsigned preinit_array_count
;
128 unsigned *init_array
;
129 unsigned init_array_count
;
130 unsigned *fini_array
;
131 unsigned fini_array_count
;
133 void (*init_func
)(void);
134 void (*fini_func
)(void);
136 #ifdef ANDROID_ARM_LINKER
137 /* ARM EABI section used for stack unwinding. */
139 unsigned ARM_exidx_count
;
143 struct link_map linkmap
;
145 int constructors_called
;
147 Elf32_Addr gnu_relro_start
;
148 unsigned gnu_relro_len
;
153 extern soinfo libdl_info
;
155 #ifdef ANDROID_ARM_LINKER
157 #define R_ARM_COPY 20
158 #define R_ARM_GLOB_DAT 21
159 #define R_ARM_JUMP_SLOT 22
160 #define R_ARM_RELATIVE 23
162 /* According to the AAPCS specification, we only
163 * need the above relocations. However, in practice,
164 * the following ones turn up from time to time.
166 #define R_ARM_ABS32 2
167 #define R_ARM_REL32 3
169 #elif defined(ANDROID_X86_LINKER)
173 #define R_386_GLOB_DAT 6
174 #define R_386_JUMP_SLOT 7
175 #define R_386_RELATIVE 8
179 #ifndef DT_INIT_ARRAY
180 #define DT_INIT_ARRAY 25
183 #ifndef DT_FINI_ARRAY
184 #define DT_FINI_ARRAY 26
187 #ifndef DT_INIT_ARRAYSZ
188 #define DT_INIT_ARRAYSZ 27
191 #ifndef DT_FINI_ARRAYSZ
192 #define DT_FINI_ARRAYSZ 28
195 #ifndef DT_PREINIT_ARRAY
196 #define DT_PREINIT_ARRAY 32
199 #ifndef DT_PREINIT_ARRAYSZ
200 #define DT_PREINIT_ARRAYSZ 33
203 soinfo
*find_library(const char *name
);
204 unsigned unload_library(soinfo
*si
);
205 Elf32_Sym
*lookup_in_library(soinfo
*si
, const char *name
);
206 Elf32_Sym
*lookup(const char *name
, soinfo
**found
, soinfo
*start
);
207 soinfo
*find_containing_library(const void *addr
);
208 Elf32_Sym
*find_containing_symbol(const void *addr
, soinfo
*si
);
209 const char *linker_get_error(void);
210 void call_constructors_recursive(soinfo
*si
);
212 #ifdef ANDROID_ARM_LINKER
213 typedef long unsigned int *_Unwind_Ptr
;
214 _Unwind_Ptr
dl_unwind_find_exidx(_Unwind_Ptr pc
, int *pcount
);
215 #elif defined(ANDROID_X86_LINKER)
216 int dl_iterate_phdr(int (*cb
)(struct dl_phdr_info
*, size_t, void *), void *);