Commit | Line | Data |
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1da177e4 LT |
1 | #include <stdio.h> |
2 | #include <stdlib.h> | |
3 | #include <stdarg.h> | |
4 | #include <string.h> | |
5 | #include <sys/types.h> | |
6 | #include <sys/stat.h> | |
7 | #include <sys/mman.h> | |
8 | #include <fcntl.h> | |
9 | #include <unistd.h> | |
10 | #include <elf.h> | |
11 | ||
12 | #include "elfconfig.h" | |
13 | ||
3c0561e0 PF |
14 | /* On BSD-alike OSes elf.h defines these according to host's word size */ |
15 | #undef ELF_ST_BIND | |
16 | #undef ELF_ST_TYPE | |
17 | #undef ELF_R_SYM | |
18 | #undef ELF_R_TYPE | |
19 | ||
1da177e4 LT |
20 | #if KERNEL_ELFCLASS == ELFCLASS32 |
21 | ||
62070fa4 SR |
22 | #define Elf_Ehdr Elf32_Ehdr |
23 | #define Elf_Shdr Elf32_Shdr | |
1da177e4 | 24 | #define Elf_Sym Elf32_Sym |
b39927cf | 25 | #define Elf_Addr Elf32_Addr |
9ad21c3f | 26 | #define Elf_Sword Elf64_Sword |
4f4c4ee1 | 27 | #define Elf_Section Elf32_Half |
1da177e4 LT |
28 | #define ELF_ST_BIND ELF32_ST_BIND |
29 | #define ELF_ST_TYPE ELF32_ST_TYPE | |
30 | ||
2c1a51f3 | 31 | #define Elf_Rel Elf32_Rel |
b39927cf SR |
32 | #define Elf_Rela Elf32_Rela |
33 | #define ELF_R_SYM ELF32_R_SYM | |
34 | #define ELF_R_TYPE ELF32_R_TYPE | |
1da177e4 LT |
35 | #else |
36 | ||
62070fa4 SR |
37 | #define Elf_Ehdr Elf64_Ehdr |
38 | #define Elf_Shdr Elf64_Shdr | |
1da177e4 | 39 | #define Elf_Sym Elf64_Sym |
b39927cf | 40 | #define Elf_Addr Elf64_Addr |
9ad21c3f | 41 | #define Elf_Sword Elf64_Sxword |
4f4c4ee1 | 42 | #define Elf_Section Elf64_Half |
1da177e4 LT |
43 | #define ELF_ST_BIND ELF64_ST_BIND |
44 | #define ELF_ST_TYPE ELF64_ST_TYPE | |
45 | ||
2c1a51f3 | 46 | #define Elf_Rel Elf64_Rel |
b39927cf SR |
47 | #define Elf_Rela Elf64_Rela |
48 | #define ELF_R_SYM ELF64_R_SYM | |
49 | #define ELF_R_TYPE ELF64_R_TYPE | |
1da177e4 LT |
50 | #endif |
51 | ||
eae07ac6 AN |
52 | /* The 64-bit MIPS ELF ABI uses an unusual reloc format. */ |
53 | typedef struct | |
54 | { | |
55 | Elf32_Word r_sym; /* Symbol index */ | |
56 | unsigned char r_ssym; /* Special symbol for 2nd relocation */ | |
57 | unsigned char r_type3; /* 3rd relocation type */ | |
58 | unsigned char r_type2; /* 2nd relocation type */ | |
59 | unsigned char r_type1; /* 1st relocation type */ | |
60 | } _Elf64_Mips_R_Info; | |
61 | ||
62 | typedef union | |
63 | { | |
64 | Elf64_Xword r_info_number; | |
65 | _Elf64_Mips_R_Info r_info_fields; | |
66 | } _Elf64_Mips_R_Info_union; | |
67 | ||
68 | #define ELF64_MIPS_R_SYM(i) \ | |
69 | ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) | |
70 | ||
ae4ac123 AN |
71 | #define ELF64_MIPS_R_TYPE(i) \ |
72 | ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1) | |
73 | ||
1da177e4 LT |
74 | #if KERNEL_ELFDATA != HOST_ELFDATA |
75 | ||
76 | static inline void __endian(const void *src, void *dest, unsigned int size) | |
77 | { | |
78 | unsigned int i; | |
79 | for (i = 0; i < size; i++) | |
80 | ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1]; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | #define TO_NATIVE(x) \ |
84 | ({ \ | |
85 | typeof(x) __x; \ | |
86 | __endian(&(x), &(__x), sizeof(__x)); \ | |
87 | __x; \ | |
88 | }) | |
89 | ||
90 | #else /* endianness matches */ | |
91 | ||
92 | #define TO_NATIVE(x) (x) | |
93 | ||
94 | #endif | |
95 | ||
96 | #define NOFAIL(ptr) do_nofail((ptr), #ptr) | |
97 | void *do_nofail(void *ptr, const char *expr); | |
98 | ||
99 | struct buffer { | |
100 | char *p; | |
101 | int pos; | |
102 | int size; | |
103 | }; | |
104 | ||
105 | void __attribute__((format(printf, 2, 3))) | |
106 | buf_printf(struct buffer *buf, const char *fmt, ...); | |
107 | ||
108 | void | |
109 | buf_write(struct buffer *buf, const char *s, int len); | |
110 | ||
111 | struct module { | |
112 | struct module *next; | |
113 | const char *name; | |
b817f6fe | 114 | int gpl_compatible; |
1da177e4 LT |
115 | struct symbol *unres; |
116 | int seen; | |
117 | int skip; | |
118 | int has_init; | |
119 | int has_cleanup; | |
120 | struct buffer dev_table_buf; | |
121 | char srcversion[25]; | |
258f7426 | 122 | int is_dot_o; |
1da177e4 LT |
123 | }; |
124 | ||
125 | struct elf_info { | |
126 | unsigned long size; | |
127 | Elf_Ehdr *hdr; | |
128 | Elf_Shdr *sechdrs; | |
129 | Elf_Sym *symtab_start; | |
130 | Elf_Sym *symtab_stop; | |
bd5cbced | 131 | Elf_Section export_sec; |
c96fca21 | 132 | Elf_Section export_unused_sec; |
bd5cbced | 133 | Elf_Section export_gpl_sec; |
c96fca21 | 134 | Elf_Section export_unused_gpl_sec; |
bd5cbced | 135 | Elf_Section export_gpl_future_sec; |
7d02b490 | 136 | char *strtab; |
1da177e4 LT |
137 | char *modinfo; |
138 | unsigned int modinfo_len; | |
1ce53adf DV |
139 | |
140 | /* support for 32bit section numbers */ | |
141 | ||
142 | unsigned int num_sections; /* max_secindex + 1 */ | |
143 | unsigned int secindex_strings; | |
144 | /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, | |
145 | * take shndx from symtab_shndx_start[N] instead */ | |
146 | Elf32_Word *symtab_shndx_start; | |
147 | Elf32_Word *symtab_shndx_stop; | |
1da177e4 LT |
148 | }; |
149 | ||
1ce53adf DV |
150 | static inline int is_shndx_special(unsigned int i) |
151 | { | |
152 | return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; | |
153 | } | |
154 | ||
6845756b AK |
155 | /* |
156 | * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of | |
157 | * the way to -256..-1, to avoid conflicting with real section | |
158 | * indices. | |
1ce53adf | 159 | */ |
6845756b | 160 | #define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) |
1ce53adf DV |
161 | |
162 | /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ | |
163 | static inline unsigned int get_secindex(const struct elf_info *info, | |
164 | const Elf_Sym *sym) | |
165 | { | |
6845756b AK |
166 | if (is_shndx_special(sym->st_shndx)) |
167 | return SPECIAL(sym->st_shndx); | |
1ce53adf DV |
168 | if (sym->st_shndx != SHN_XINDEX) |
169 | return sym->st_shndx; | |
6845756b | 170 | return info->symtab_shndx_start[sym - info->symtab_start]; |
1ce53adf DV |
171 | } |
172 | ||
cb80514d | 173 | /* file2alias.c */ |
4ce6efed | 174 | extern unsigned int cross_build; |
1da177e4 LT |
175 | void handle_moddevtable(struct module *mod, struct elf_info *info, |
176 | Elf_Sym *sym, const char *symname); | |
1da177e4 LT |
177 | void add_moddevtable(struct buffer *buf, struct module *mod); |
178 | ||
cb80514d | 179 | /* sumversion.c */ |
1da177e4 LT |
180 | void maybe_frob_rcs_version(const char *modfilename, |
181 | char *version, | |
182 | void *modinfo, | |
183 | unsigned long modinfo_offset); | |
184 | void get_src_version(const char *modname, char sum[], unsigned sumlen); | |
185 | ||
cb80514d | 186 | /* from modpost.c */ |
1da177e4 LT |
187 | void *grab_file(const char *filename, unsigned long *size); |
188 | char* get_next_line(unsigned long *pos, void *file, unsigned long size); | |
189 | void release_file(void *file, unsigned long size); | |
cb80514d SR |
190 | |
191 | void fatal(const char *fmt, ...); | |
192 | void warn(const char *fmt, ...); | |
2a116659 | 193 | void merror(const char *fmt, ...); |