blob: 999f15e0e0083252e7991910eeab55494131b525 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
14#if KERNEL_ELFCLASS == ELFCLASS32
15
Sam Ravnborg62070fa2006-03-03 16:46:04 +010016#define Elf_Ehdr Elf32_Ehdr
17#define Elf_Shdr Elf32_Shdr
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#define Elf_Sym Elf32_Sym
Sam Ravnborgb39927c2006-02-17 22:42:02 +010019#define Elf_Addr Elf32_Addr
Sam Ravnborg9ad21c32008-01-18 21:04:34 +010020#define Elf_Sword Elf64_Sword
Sam Ravnborg4f4c4ee2007-08-12 23:17:54 +020021#define Elf_Section Elf32_Half
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#define ELF_ST_BIND ELF32_ST_BIND
23#define ELF_ST_TYPE ELF32_ST_TYPE
24
Atsushi Nemoto2c1a51f2006-05-20 15:00:26 -070025#define Elf_Rel Elf32_Rel
Sam Ravnborgb39927c2006-02-17 22:42:02 +010026#define Elf_Rela Elf32_Rela
27#define ELF_R_SYM ELF32_R_SYM
28#define ELF_R_TYPE ELF32_R_TYPE
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#else
30
Sam Ravnborg62070fa2006-03-03 16:46:04 +010031#define Elf_Ehdr Elf64_Ehdr
32#define Elf_Shdr Elf64_Shdr
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#define Elf_Sym Elf64_Sym
Sam Ravnborgb39927c2006-02-17 22:42:02 +010034#define Elf_Addr Elf64_Addr
Sam Ravnborg9ad21c32008-01-18 21:04:34 +010035#define Elf_Sword Elf64_Sxword
Sam Ravnborg4f4c4ee2007-08-12 23:17:54 +020036#define Elf_Section Elf64_Half
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define ELF_ST_BIND ELF64_ST_BIND
38#define ELF_ST_TYPE ELF64_ST_TYPE
39
Atsushi Nemoto2c1a51f2006-05-20 15:00:26 -070040#define Elf_Rel Elf64_Rel
Sam Ravnborgb39927c2006-02-17 22:42:02 +010041#define Elf_Rela Elf64_Rela
42#define ELF_R_SYM ELF64_R_SYM
43#define ELF_R_TYPE ELF64_R_TYPE
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#endif
45
Atsushi Nemotoeae07ac2006-05-20 15:00:28 -070046/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
47typedef struct
48{
49 Elf32_Word r_sym; /* Symbol index */
50 unsigned char r_ssym; /* Special symbol for 2nd relocation */
51 unsigned char r_type3; /* 3rd relocation type */
52 unsigned char r_type2; /* 2nd relocation type */
53 unsigned char r_type1; /* 1st relocation type */
54} _Elf64_Mips_R_Info;
55
56typedef union
57{
58 Elf64_Xword r_info_number;
59 _Elf64_Mips_R_Info r_info_fields;
60} _Elf64_Mips_R_Info_union;
61
62#define ELF64_MIPS_R_SYM(i) \
63 ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
64
Atsushi Nemotoae4ac122007-05-22 18:27:39 +090065#define ELF64_MIPS_R_TYPE(i) \
66 ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#if KERNEL_ELFDATA != HOST_ELFDATA
69
70static inline void __endian(const void *src, void *dest, unsigned int size)
71{
72 unsigned int i;
73 for (i = 0; i < size; i++)
74 ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
75}
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#define TO_NATIVE(x) \
78({ \
79 typeof(x) __x; \
80 __endian(&(x), &(__x), sizeof(__x)); \
81 __x; \
82})
83
84#else /* endianness matches */
85
86#define TO_NATIVE(x) (x)
87
88#endif
89
90#define NOFAIL(ptr) do_nofail((ptr), #ptr)
91void *do_nofail(void *ptr, const char *expr);
92
93struct buffer {
94 char *p;
95 int pos;
96 int size;
97};
98
99void __attribute__((format(printf, 2, 3)))
100buf_printf(struct buffer *buf, const char *fmt, ...);
101
102void
103buf_write(struct buffer *buf, const char *s, int len);
104
105struct module {
106 struct module *next;
107 const char *name;
Sam Ravnborgb817f6f2006-06-09 21:53:55 +0200108 int gpl_compatible;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 struct symbol *unres;
110 int seen;
111 int skip;
112 int has_init;
113 int has_cleanup;
114 struct buffer dev_table_buf;
115 char srcversion[25];
116};
117
118struct elf_info {
119 unsigned long size;
120 Elf_Ehdr *hdr;
121 Elf_Shdr *sechdrs;
122 Elf_Sym *symtab_start;
123 Elf_Sym *symtab_stop;
Ram Paibd5cbce2006-06-08 22:12:53 -0700124 Elf_Section export_sec;
Sam Ravnborgc96fca22006-07-01 11:44:23 +0200125 Elf_Section export_unused_sec;
Ram Paibd5cbce2006-06-08 22:12:53 -0700126 Elf_Section export_gpl_sec;
Sam Ravnborgc96fca22006-07-01 11:44:23 +0200127 Elf_Section export_unused_gpl_sec;
Ram Paibd5cbce2006-06-08 22:12:53 -0700128 Elf_Section export_gpl_future_sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 const char *strtab;
130 char *modinfo;
131 unsigned int modinfo_len;
132};
133
Sam Ravnborgcb805142006-01-28 16:57:26 +0100134/* file2alias.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135void handle_moddevtable(struct module *mod, struct elf_info *info,
136 Elf_Sym *sym, const char *symname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137void add_moddevtable(struct buffer *buf, struct module *mod);
138
Sam Ravnborgcb805142006-01-28 16:57:26 +0100139/* sumversion.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140void maybe_frob_rcs_version(const char *modfilename,
141 char *version,
142 void *modinfo,
143 unsigned long modinfo_offset);
144void get_src_version(const char *modname, char sum[], unsigned sumlen);
145
Sam Ravnborgcb805142006-01-28 16:57:26 +0100146/* from modpost.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147void *grab_file(const char *filename, unsigned long *size);
148char* get_next_line(unsigned long *pos, void *file, unsigned long size);
149void release_file(void *file, unsigned long size);
Sam Ravnborgcb805142006-01-28 16:57:26 +0100150
151void fatal(const char *fmt, ...);
152void warn(const char *fmt, ...);
Matthew Wilcox2a116652006-10-07 05:35:32 -0600153void merror(const char *fmt, ...);