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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
#ifndef SOURCE_H
#define SOURCE_H
#include <sys/types.h>
#include <sys/stat.h>
#include <libelf.h>
#include <libebl.h>
#ifdef ARM_SPECIFIC_HACKS
#include <libebl_arm.h>
#endif/*ARM_SPECIFIC_HACKS*/
#include <elf.h>
#include <gelf.h>
#include <rangesort.h>
#include <elfcopy.h>
typedef struct source_t source_t;
typedef struct {
Elf_Scn *scn;
GElf_Shdr shdr;
Elf_Data *data;
shdr_info_t *info;
} section_info_t;
typedef struct {
GElf_Rel *rels;
int num_rels; /* number of relocations that were not finished */
int rels_size; /* this is the size of rels[], NOT the number of rels! */
} unfinished_relocation_t;
typedef struct {
int processed;
size_t idx; /* index of DT entry in the .dynamic section, if entry has a ptr value */
Elf64_Addr addr; /* if DT entry's value is an address, we save it here */
size_t sz_idx; /* index of DT entry in the .dynamic section, if entry has a size value */
Elf64_Xword size; /* if DT entry's value is a size, we save it here */
range_list_t *sections; /* list of sections corresponding to this entry */
int num_unfinished_relocs; /* this variables is populated by adjust_dynamic_segment_for()
during the second pass of the prelinker */
} dt_rel_info_t;
struct source_t {
source_t *next;
char *name; /* full path name of this executable file */
char *output; /* name of the output file or directory */
int output_is_dir; /* nonzero if output is a directory, 0 if output is a file */
/* ELF-related information: */
Elf *oldelf;
Elf *elf;
/* info[] is an array of structures describing the sections of the new ELF
file. We populate the info[] array in clone_elf(), and use it to
adjust the size of the ELF file when we modify the relocation-entry
section.
*/
shdr_info_t *shdr_info;
GElf_Ehdr old_ehdr_mem; /* store ELF header of original library */
GElf_Ehdr ehdr_mem; /* store ELF header of new library */
GElf_Phdr *phdr_info;
Ebl *ebl;
Elf_Data *shstrtab_data;
int elf_fd;
int newelf_fd; /* fd of output file, -1 if output == NULL */
struct stat elf_file_info;
GElf_Ehdr elf_hdr, oldelf_hdr;
size_t shstrndx;
int shnum; /* number of sections */
int dry_run; /* 0 if we do not update the files, 1 (default) otherwise */
section_info_t symtab;
section_info_t strtab;
section_info_t dynamic;
section_info_t hash;
section_info_t bss;
range_list_t *sorted_sections;
section_info_t *relocation_sections; /* relocation sections in file */
int num_relocation_sections; /* number of relocation sections (<= relocation_sections_size) */
int relocation_sections_size; /* sice of array -- NOT number of relocs! */
/* relocation sections that contain relocations that could not be handled.
This array is parallel to relocation_sections, and for each entry
in that array, it contains a list of relocations that could not be
handled.
*/
unfinished_relocation_t *unfinished;
/* The sections field of these two structuer contains a list of elements
of the member variable relocations. */
dt_rel_info_t rel;
dt_rel_info_t jmprel;
int num_syms; /* number of symbols in symbol table. This is the length of
both exports[] and satisfied[] arrays. */
/* This is an array that contains one element for each library dependency
listed in the executable or shared library. */
source_t **lib_deps; /* list of library dependencies */
int num_lib_deps; /* actual number of library dependencies */
int lib_deps_size; /* size of lib_deps array--NOT actual number of deps! */
/* This is zero for executables. For shared libraries, it is the address
at which the library was prelinked. */
unsigned base;
#ifdef SUPPORT_ANDROID_PRELINK_TAGS
/* When we read in a file, if it has the prelinked tag, we set prelinked
to 1 and the prelink address in the tag to prelink_base. This address
must match the value of base that we choose. */
int prelinked;
long prelink_base; /* valid if prelinked != 0 */
#endif/*SUPPORT_ANDROID_PRELINK_TAGS*/
};
extern void find_section(source_t *source, Elf64_Addr address,
Elf_Scn **scn,
GElf_Shdr *shdr,
Elf_Data **data);
#endif/*SOURCE_H*/
|
