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5
6 #ifndef _OBJTOOL_ELF_H
7 #define _OBJTOOL_ELF_H
8
9 #include <stdio.h>
10 #include <gelf.h>
11 #include <linux/list.h>
12 #include <linux/hashtable.h>
13
14 #ifdef LIBELF_USE_DEPRECATED
15 # define elf_getshdrnum elf_getshnum
16 # define elf_getshdrstrndx elf_getshstrndx
17 #endif
18
19
20
21
22 #ifndef ELF_C_READ_MMAP
23 #define ELF_C_READ_MMAP ELF_C_READ
24 #endif
25
26 struct section {
27 struct list_head list;
28 GElf_Shdr sh;
29 struct list_head symbol_list;
30 DECLARE_HASHTABLE(symbol_hash, 8);
31 struct list_head rela_list;
32 DECLARE_HASHTABLE(rela_hash, 16);
33 struct section *base, *rela;
34 struct symbol *sym;
35 Elf_Data *data;
36 char *name;
37 int idx;
38 unsigned int len;
39 bool changed, text, rodata;
40 };
41
42 struct symbol {
43 struct list_head list;
44 struct hlist_node hash;
45 GElf_Sym sym;
46 struct section *sec;
47 char *name;
48 unsigned int idx;
49 unsigned char bind, type;
50 unsigned long offset;
51 unsigned int len;
52 struct symbol *pfunc, *cfunc, *alias;
53 bool uaccess_safe;
54 };
55
56 struct rela {
57 struct list_head list;
58 struct hlist_node hash;
59 GElf_Rela rela;
60 struct section *sec;
61 struct symbol *sym;
62 unsigned int type;
63 unsigned long offset;
64 int addend;
65 bool jump_table_start;
66 };
67
68 struct elf {
69 Elf *elf;
70 GElf_Ehdr ehdr;
71 int fd;
72 char *name;
73 struct list_head sections;
74 DECLARE_HASHTABLE(rela_hash, 16);
75 };
76
77
78 struct elf *elf_read(const char *name, int flags);
79 struct section *find_section_by_name(struct elf *elf, const char *name);
80 struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
81 struct symbol *find_symbol_by_name(struct elf *elf, const char *name);
82 struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
83 struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
84 struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
85 unsigned int len);
86 struct symbol *find_containing_func(struct section *sec, unsigned long offset);
87 struct section *elf_create_section(struct elf *elf, const char *name, size_t
88 entsize, int nr);
89 struct section *elf_create_rela_section(struct elf *elf, struct section *base);
90 int elf_rebuild_rela_section(struct section *sec);
91 int elf_write(struct elf *elf);
92 void elf_close(struct elf *elf);
93
94 #define for_each_sec(file, sec) \
95 list_for_each_entry(sec, &file->elf->sections, list)
96
97 #endif