]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #include <stdio.h> |
3 | #include <stdlib.h> | |
4 | #include <stdarg.h> | |
5 | #include <string.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <sys/mman.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
11 | #include <elf.h> | |
12 | ||
13 | #include "elfconfig.h" | |
14 | ||
3c0561e0 PF |
15 | /* On BSD-alike OSes elf.h defines these according to host's word size */ |
16 | #undef ELF_ST_BIND | |
17 | #undef ELF_ST_TYPE | |
18 | #undef ELF_R_SYM | |
19 | #undef ELF_R_TYPE | |
20 | ||
1da177e4 LT |
21 | #if KERNEL_ELFCLASS == ELFCLASS32 |
22 | ||
62070fa4 SR |
23 | #define Elf_Ehdr Elf32_Ehdr |
24 | #define Elf_Shdr Elf32_Shdr | |
1da177e4 | 25 | #define Elf_Sym Elf32_Sym |
b39927cf | 26 | #define Elf_Addr Elf32_Addr |
9ad21c3f | 27 | #define Elf_Sword Elf64_Sword |
4f4c4ee1 | 28 | #define Elf_Section Elf32_Half |
1da177e4 LT |
29 | #define ELF_ST_BIND ELF32_ST_BIND |
30 | #define ELF_ST_TYPE ELF32_ST_TYPE | |
31 | ||
2c1a51f3 | 32 | #define Elf_Rel Elf32_Rel |
b39927cf SR |
33 | #define Elf_Rela Elf32_Rela |
34 | #define ELF_R_SYM ELF32_R_SYM | |
35 | #define ELF_R_TYPE ELF32_R_TYPE | |
1da177e4 LT |
36 | #else |
37 | ||
62070fa4 SR |
38 | #define Elf_Ehdr Elf64_Ehdr |
39 | #define Elf_Shdr Elf64_Shdr | |
1da177e4 | 40 | #define Elf_Sym Elf64_Sym |
b39927cf | 41 | #define Elf_Addr Elf64_Addr |
9ad21c3f | 42 | #define Elf_Sword Elf64_Sxword |
4f4c4ee1 | 43 | #define Elf_Section Elf64_Half |
1da177e4 LT |
44 | #define ELF_ST_BIND ELF64_ST_BIND |
45 | #define ELF_ST_TYPE ELF64_ST_TYPE | |
46 | ||
2c1a51f3 | 47 | #define Elf_Rel Elf64_Rel |
b39927cf SR |
48 | #define Elf_Rela Elf64_Rela |
49 | #define ELF_R_SYM ELF64_R_SYM | |
50 | #define ELF_R_TYPE ELF64_R_TYPE | |
1da177e4 LT |
51 | #endif |
52 | ||
eae07ac6 AN |
53 | /* The 64-bit MIPS ELF ABI uses an unusual reloc format. */ |
54 | typedef struct | |
55 | { | |
56 | Elf32_Word r_sym; /* Symbol index */ | |
57 | unsigned char r_ssym; /* Special symbol for 2nd relocation */ | |
58 | unsigned char r_type3; /* 3rd relocation type */ | |
59 | unsigned char r_type2; /* 2nd relocation type */ | |
60 | unsigned char r_type1; /* 1st relocation type */ | |
61 | } _Elf64_Mips_R_Info; | |
62 | ||
63 | typedef union | |
64 | { | |
65 | Elf64_Xword r_info_number; | |
66 | _Elf64_Mips_R_Info r_info_fields; | |
67 | } _Elf64_Mips_R_Info_union; | |
68 | ||
69 | #define ELF64_MIPS_R_SYM(i) \ | |
70 | ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) | |
71 | ||
ae4ac123 AN |
72 | #define ELF64_MIPS_R_TYPE(i) \ |
73 | ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1) | |
74 | ||
1da177e4 LT |
75 | #if KERNEL_ELFDATA != HOST_ELFDATA |
76 | ||
77 | static inline void __endian(const void *src, void *dest, unsigned int size) | |
78 | { | |
79 | unsigned int i; | |
80 | for (i = 0; i < size; i++) | |
81 | ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1]; | |
82 | } | |
83 | ||
1da177e4 LT |
84 | #define TO_NATIVE(x) \ |
85 | ({ \ | |
86 | typeof(x) __x; \ | |
87 | __endian(&(x), &(__x), sizeof(__x)); \ | |
88 | __x; \ | |
89 | }) | |
90 | ||
91 | #else /* endianness matches */ | |
92 | ||
93 | #define TO_NATIVE(x) (x) | |
94 | ||
95 | #endif | |
96 | ||
97 | #define NOFAIL(ptr) do_nofail((ptr), #ptr) | |
98 | void *do_nofail(void *ptr, const char *expr); | |
99 | ||
100 | struct buffer { | |
101 | char *p; | |
102 | int pos; | |
103 | int size; | |
104 | }; | |
105 | ||
106 | void __attribute__((format(printf, 2, 3))) | |
107 | buf_printf(struct buffer *buf, const char *fmt, ...); | |
108 | ||
109 | void | |
110 | buf_write(struct buffer *buf, const char *s, int len); | |
111 | ||
112 | struct module { | |
113 | struct module *next; | |
114 | const char *name; | |
b817f6fe | 115 | int gpl_compatible; |
1da177e4 LT |
116 | struct symbol *unres; |
117 | int seen; | |
118 | int skip; | |
119 | int has_init; | |
120 | int has_cleanup; | |
121 | struct buffer dev_table_buf; | |
122 | char srcversion[25]; | |
258f7426 | 123 | int is_dot_o; |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct elf_info { | |
127 | unsigned long size; | |
128 | Elf_Ehdr *hdr; | |
129 | Elf_Shdr *sechdrs; | |
130 | Elf_Sym *symtab_start; | |
131 | Elf_Sym *symtab_stop; | |
bd5cbced | 132 | Elf_Section export_sec; |
c96fca21 | 133 | Elf_Section export_unused_sec; |
bd5cbced | 134 | Elf_Section export_gpl_sec; |
c96fca21 | 135 | Elf_Section export_unused_gpl_sec; |
bd5cbced | 136 | Elf_Section export_gpl_future_sec; |
7d02b490 | 137 | char *strtab; |
1da177e4 LT |
138 | char *modinfo; |
139 | unsigned int modinfo_len; | |
1ce53adf DV |
140 | |
141 | /* support for 32bit section numbers */ | |
142 | ||
143 | unsigned int num_sections; /* max_secindex + 1 */ | |
144 | unsigned int secindex_strings; | |
145 | /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, | |
146 | * take shndx from symtab_shndx_start[N] instead */ | |
147 | Elf32_Word *symtab_shndx_start; | |
148 | Elf32_Word *symtab_shndx_stop; | |
1da177e4 LT |
149 | }; |
150 | ||
1ce53adf DV |
151 | static inline int is_shndx_special(unsigned int i) |
152 | { | |
153 | return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; | |
154 | } | |
155 | ||
6845756b AK |
156 | /* |
157 | * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of | |
158 | * the way to -256..-1, to avoid conflicting with real section | |
159 | * indices. | |
1ce53adf | 160 | */ |
6845756b | 161 | #define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) |
1ce53adf DV |
162 | |
163 | /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ | |
164 | static inline unsigned int get_secindex(const struct elf_info *info, | |
165 | const Elf_Sym *sym) | |
166 | { | |
6845756b AK |
167 | if (is_shndx_special(sym->st_shndx)) |
168 | return SPECIAL(sym->st_shndx); | |
1ce53adf DV |
169 | if (sym->st_shndx != SHN_XINDEX) |
170 | return sym->st_shndx; | |
6845756b | 171 | return info->symtab_shndx_start[sym - info->symtab_start]; |
1ce53adf DV |
172 | } |
173 | ||
cb80514d | 174 | /* file2alias.c */ |
4ce6efed | 175 | extern unsigned int cross_build; |
1da177e4 LT |
176 | void handle_moddevtable(struct module *mod, struct elf_info *info, |
177 | Elf_Sym *sym, const char *symname); | |
1da177e4 LT |
178 | void add_moddevtable(struct buffer *buf, struct module *mod); |
179 | ||
cb80514d | 180 | /* sumversion.c */ |
1da177e4 LT |
181 | void maybe_frob_rcs_version(const char *modfilename, |
182 | char *version, | |
183 | void *modinfo, | |
184 | unsigned long modinfo_offset); | |
185 | void get_src_version(const char *modname, char sum[], unsigned sumlen); | |
186 | ||
cb80514d | 187 | /* from modpost.c */ |
1da177e4 LT |
188 | void *grab_file(const char *filename, unsigned long *size); |
189 | char* get_next_line(unsigned long *pos, void *file, unsigned long size); | |
190 | void release_file(void *file, unsigned long size); | |
cb80514d SR |
191 | |
192 | void fatal(const char *fmt, ...); | |
193 | void warn(const char *fmt, ...); | |
2a116659 | 194 | void merror(const char *fmt, ...); |