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1 | #ifndef ELF_H_INCLUDED |
2 | #define ELF_H_INCLUDED | |
3 | ||
4 | #include <stdint.h> | |
5 | ||
6 | /* Type for a 16-bit quantity. */ | |
7 | typedef uint16_t Elf32_Half; | |
8 | typedef uint16_t Elf64_Half; | |
9 | ||
10 | /* Types for signed and unsigned 32-bit quantities. */ | |
11 | typedef uint32_t Elf32_Word; | |
12 | typedef int32_t Elf32_Sword; | |
13 | typedef uint32_t Elf64_Word; | |
14 | typedef int32_t Elf64_Sword; | |
15 | ||
16 | /* Types for signed and unsigned 64-bit quantities. */ | |
17 | typedef uint64_t Elf32_Xword; | |
18 | typedef int64_t Elf32_Sxword; | |
19 | typedef uint64_t Elf64_Xword; | |
20 | typedef int64_t Elf64_Sxword; | |
21 | ||
22 | /* Type of addresses. */ | |
23 | typedef uint32_t Elf32_Addr; | |
24 | typedef uint64_t Elf64_Addr; | |
25 | ||
26 | /* Type of file offsets. */ | |
27 | typedef uint32_t Elf32_Off; | |
28 | typedef uint64_t Elf64_Off; | |
29 | ||
30 | /* Type for section indices, which are 16-bit quantities. */ | |
31 | typedef uint16_t Elf32_Section; | |
32 | typedef uint16_t Elf64_Section; | |
33 | ||
34 | /* Type for version symbol information. */ | |
35 | typedef Elf32_Half Elf32_Versym; | |
36 | typedef Elf64_Half Elf64_Versym; | |
37 | ||
38 | ||
39 | /* The ELF file header. This appears at the start of every ELF file. */ | |
40 | typedef struct { | |
41 | unsigned char e_ident[16]; /* Magic number and other info */ | |
42 | Elf32_Half e_type; /* Object file type */ | |
43 | Elf32_Half e_machine; /* Architecture */ | |
44 | Elf32_Word e_version; /* Object file version */ | |
45 | Elf32_Addr e_entry; /* Entry point virtual address */ | |
46 | Elf32_Off e_phoff; /* Program header table (usually follows elf header directly) file offset */ | |
47 | Elf32_Off e_shoff; /* Section header table (at end of file) file offset */ | |
48 | Elf32_Word e_flags; /* Processor-specific flags */ | |
49 | Elf32_Half e_ehsize; /* ELF header size in bytes */ | |
50 | Elf32_Half e_phentsize; /* Program header table entry size */ | |
51 | Elf32_Half e_phnum; /* Program header table entry count */ | |
52 | Elf32_Half e_shentsize; /* Section header table entry size */ | |
53 | Elf32_Half e_shnum; /* Section header table entry count */ | |
54 | Elf32_Half e_shstrndx; /* Section header string table index */ | |
55 | } Elf32_Ehdr; | |
56 | typedef struct { | |
57 | unsigned char e_ident[16]; /* Magic number and other info */ | |
58 | Elf64_Half e_type; /* Object file type */ | |
59 | Elf64_Half e_machine; /* Architecture */ | |
60 | Elf64_Word e_version; /* Object file version */ | |
61 | Elf64_Addr e_entry; /* Entry point virtual address */ | |
62 | Elf64_Off e_phoff; /* Program header table file offset */ | |
63 | Elf64_Off e_shoff; /* Section header table file offset */ | |
64 | Elf64_Word e_flags; /* Processor-specific flags */ | |
65 | Elf64_Half e_ehsize; /* ELF header size in bytes */ | |
66 | Elf64_Half e_phentsize; /* Program header table entry size */ | |
67 | Elf64_Half e_phnum; /* Program header table entry count */ | |
68 | Elf64_Half e_shentsize; /* Section header table entry size */ | |
69 | Elf64_Half e_shnum; /* Section header table entry count */ | |
70 | Elf64_Half e_shstrndx; /* Section header string table index */ | |
71 | } Elf64_Ehdr; | |
72 | ||
73 | /* Section header entry. The number of section entries in the file are determined by the "e_shnum" field of the ELF header.*/ | |
74 | typedef struct { | |
75 | Elf32_Word sh_name; /* Section name (string tbl index) */ | |
76 | Elf32_Word sh_type; /* Section type */ | |
77 | Elf32_Word sh_flags; /* Section flags */ | |
78 | Elf32_Addr sh_addr; /* Section virtual addr at execution */ | |
79 | Elf32_Off sh_offset; /* Section file offset */ | |
80 | Elf32_Word sh_size; /* Section size in bytes */ | |
81 | Elf32_Word sh_link; /* Link to another section */ | |
82 | Elf32_Word sh_info; /* Additional section information */ | |
83 | Elf32_Word sh_addralign; /* Section alignment */ | |
84 | Elf32_Word sh_entsize; /* Entry size if section holds table */ | |
85 | } Elf32_Shdr; | |
86 | typedef struct { | |
87 | Elf64_Word sh_name; /* Section name (string tbl index) */ | |
88 | Elf64_Word sh_type; /* Section type */ | |
89 | Elf64_Xword sh_flags; /* Section flags */ | |
90 | Elf64_Addr sh_addr; /* Section virtual addr at execution */ | |
91 | Elf64_Off sh_offset; /* Section file offset */ | |
92 | Elf64_Xword sh_size; /* Section size in bytes */ | |
93 | Elf64_Word sh_link; /* Link to another section */ | |
94 | Elf64_Word sh_info; /* Additional section information */ | |
95 | Elf64_Xword sh_addralign; /* Section alignment */ | |
96 | Elf64_Xword sh_entsize; /* Entry size if section holds table */ | |
97 | } Elf64_Shdr; | |
98 | ||
99 | /* Legal values for sh_type (section type). */ | |
100 | #define SHT_NULL 0 /* Section header table entry unused */ | |
101 | #define SHT_PROGBITS 1 /* Program data */ | |
102 | #define SHT_SYMTAB 2 /* Symbol table */ | |
103 | #define SHT_STRTAB 3 /* String table */ | |
104 | #define SHT_RELA 4 /* Relocation entries with addends */ | |
105 | #define SHT_HASH 5 /* Symbol hash table */ | |
106 | #define SHT_DYNAMIC 6 /* Dynamic linking information. Contains Elf32_Dyn/Elf64_Dyn entries. */ | |
107 | #define SHT_NOTE 7 /* Notes */ | |
108 | #define SHT_NOBITS 8 /* Program space with no data (bss) */ | |
109 | #define SHT_REL 9 /* Relocation entries, no addends */ | |
110 | #define SHT_SHLIB 10 /* Reserved */ | |
111 | #define SHT_DYNSYM 11 /* Dynamic linker symbol table */ | |
112 | #define SHT_INIT_ARRAY 14 /* Array of constructors */ | |
113 | #define SHT_FINI_ARRAY 15 /* Array of destructors */ | |
114 | #define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */ | |
115 | #define SHT_GROUP 17 /* Section group */ | |
116 | #define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */ | |
117 | #define SHT_NUM 19 /* Number of defined types. */ | |
118 | #define SHT_LOOS 0x60000000 /* Start OS-specific. */ | |
119 | #define SHT_GNU_ATTRIBUTES 0x6ffffff5 /* Object attributes. */ | |
120 | #define SHT_GNU_HASH 0x6ffffff6 /* GNU-style hash table. */ | |
121 | #define SHT_GNU_LIBLIST 0x6ffffff7 /* Prelink library list */ | |
122 | #define SHT_CHECKSUM 0x6ffffff8 /* Checksum for DSO content. */ | |
123 | #define SHT_LOSUNW 0x6ffffffa /* Sun-specific low bound. */ | |
124 | #define SHT_SUNW_move 0x6ffffffa | |
125 | #define SHT_SUNW_COMDAT 0x6ffffffb | |
126 | #define SHT_SUNW_syminfo 0x6ffffffc | |
127 | #define SHT_GNU_verdef 0x6ffffffd /* Version definition section. */ | |
128 | #define SHT_GNU_verneed 0x6ffffffe /* Version needs section. */ | |
129 | #define SHT_GNU_versym 0x6fffffff /* Version symbol table. */ | |
130 | #define SHT_HISUNW 0x6fffffff /* Sun-specific high bound. */ | |
131 | #define SHT_HIOS 0x6fffffff /* End OS-specific type */ | |
132 | #define SHT_LOPROC 0x70000000 /* Start of processor-specific */ | |
133 | #define SHT_HIPROC 0x7fffffff /* End of processor-specific */ | |
134 | #define SHT_LOUSER 0x80000000 /* Start of application-specific */ | |
135 | #define SHT_HIUSER 0x8fffffff /* End of application-specific */ | |
136 | ||
137 | /* Dynamic section entry. */ | |
138 | typedef struct { | |
139 | Elf32_Sword d_tag; /* Dynamic entry type */ | |
140 | union { Elf32_Word d_val; Elf32_Addr d_ptr; } d_un; /* Integer or address value */ | |
141 | } Elf32_Dyn; | |
142 | typedef struct { | |
143 | Elf64_Sxword d_tag; /* Dynamic entry type */ | |
144 | union { Elf64_Xword d_val; Elf64_Addr d_ptr; } d_un; /* Integer or address value */ | |
145 | } Elf64_Dyn; | |
146 | ||
147 | /* Legal values for d_tag (dynamic entry type). */ | |
148 | #define DT_NULL 0 /* Marks end of dynamic section */ | |
149 | #define DT_NEEDED 1 /* Name of needed library */ | |
150 | #define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */ | |
151 | #define DT_PLTGOT 3 /* Processor defined value */ | |
152 | #define DT_HASH 4 /* Address of symbol hash table */ | |
153 | #define DT_STRTAB 5 /* Address of string table */ | |
154 | #define DT_SYMTAB 6 /* Address of symbol table */ | |
155 | #define DT_RELA 7 /* Address of Rela relocs */ | |
156 | #define DT_RELASZ 8 /* Total size of Rela relocs */ | |
157 | #define DT_RELAENT 9 /* Size of one Rela reloc */ | |
158 | #define DT_STRSZ 10 /* Size of string table */ | |
159 | #define DT_SYMENT 11 /* Size of one symbol table entry */ | |
160 | #define DT_INIT 12 /* Address of init function */ | |
161 | #define DT_FINI 13 /* Address of termination function */ | |
162 | #define DT_SONAME 14 /* Name of shared object */ | |
163 | #define DT_RPATH 15 /* Library search path (deprecated) */ | |
164 | #define DT_SYMBOLIC 16 /* Start symbol search here */ | |
165 | #define DT_REL 17 /* Address of Rel relocs */ | |
166 | #define DT_RELSZ 18 /* Total size of Rel relocs */ | |
167 | #define DT_RELENT 19 /* Size of one Rel reloc */ | |
168 | #define DT_PLTREL 20 /* Type of reloc in PLT */ | |
169 | #define DT_DEBUG 21 /* For debugging; unspecified */ | |
170 | #define DT_TEXTREL 22 /* Reloc might modify .text */ | |
171 | #define DT_JMPREL 23 /* Address of PLT relocs */ | |
172 | #define DT_BIND_NOW 24 /* Process relocations of object */ | |
173 | #define DT_INIT_ARRAY 25 /* Array with addresses of init fct */ | |
174 | #define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */ | |
175 | #define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */ | |
176 | #define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */ | |
177 | #define DT_RUNPATH 29 /* Library search path */ | |
178 | #define DT_FLAGS 30 /* Flags for the object being loaded */ | |
179 | #define DT_ENCODING 32 /* Start of encoded range */ | |
180 | #define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/ | |
181 | #define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */ | |
182 | #define DT_NUM 34 /* Number used */ | |
183 | #define DT_LOOS 0x6000000d /* Start of OS-specific */ | |
184 | #define DT_HIOS 0x6ffff000 /* End of OS-specific */ | |
185 | #define DT_LOPROC 0x70000000 /* Start of processor-specific */ | |
186 | #define DT_HIPROC 0x7fffffff /* End of processor-specific */ | |
187 | ||
188 | ||
189 | /* Symbol table entry. */ | |
190 | typedef struct { | |
191 | Elf32_Word st_name; /* Symbol name (string tbl index) */ | |
192 | Elf32_Addr st_value; /* Symbol value */ | |
193 | Elf32_Word st_size; /* Symbol size */ | |
194 | unsigned char st_info; /* Symbol type and binding */ | |
195 | unsigned char st_other; /* Symbol visibility */ | |
196 | Elf32_Section st_shndx; /* Section index */ | |
197 | } Elf32_Sym; | |
198 | ||
199 | typedef struct { | |
200 | Elf64_Word st_name; /* Symbol name (string tbl index) */ | |
201 | unsigned char st_info; /* Symbol type and binding */ | |
202 | unsigned char st_other; /* Symbol visibility */ | |
203 | Elf64_Section st_shndx; /* Section index */ | |
204 | Elf64_Addr st_value; /* Symbol value */ | |
205 | Elf64_Xword st_size; /* Symbol size */ | |
206 | } Elf64_Sym; | |
207 | ||
208 | ||
209 | #endif |