modpost.h revision eae07ac607f317ee6781983d3f9d8f77ef144b45 
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
14#if KERNEL_ELFCLASS == ELFCLASS32
15
16#define Elf_Ehdr    Elf32_Ehdr
17#define Elf_Shdr    Elf32_Shdr
18#define Elf_Sym     Elf32_Sym
19#define Elf_Addr    Elf32_Addr
20#define Elf_Section Elf32_Section
21#define ELF_ST_BIND ELF32_ST_BIND
22#define ELF_ST_TYPE ELF32_ST_TYPE
23
24#define Elf_Rel     Elf32_Rel
25#define Elf_Rela    Elf32_Rela
26#define ELF_R_SYM   ELF32_R_SYM
27#define ELF_R_TYPE  ELF32_R_TYPE
28#else
29
30#define Elf_Ehdr    Elf64_Ehdr
31#define Elf_Shdr    Elf64_Shdr
32#define Elf_Sym     Elf64_Sym
33#define Elf_Addr    Elf64_Addr
34#define Elf_Section Elf64_Section
35#define ELF_ST_BIND ELF64_ST_BIND
36#define ELF_ST_TYPE ELF64_ST_TYPE
37
38#define Elf_Rel     Elf64_Rel
39#define Elf_Rela    Elf64_Rela
40#define ELF_R_SYM   ELF64_R_SYM
41#define ELF_R_TYPE  ELF64_R_TYPE
42#endif
43
44/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
45typedef struct
46{
47	Elf32_Word    r_sym;	/* Symbol index */
48	unsigned char r_ssym;	/* Special symbol for 2nd relocation */
49	unsigned char r_type3;	/* 3rd relocation type */
50	unsigned char r_type2;	/* 2nd relocation type */
51	unsigned char r_type1;	/* 1st relocation type */
52} _Elf64_Mips_R_Info;
53
54typedef union
55{
56	Elf64_Xword		r_info_number;
57	_Elf64_Mips_R_Info	r_info_fields;
58} _Elf64_Mips_R_Info_union;
59
60#define ELF64_MIPS_R_SYM(i) \
61  ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
62
63#if KERNEL_ELFDATA != HOST_ELFDATA
64
65static inline void __endian(const void *src, void *dest, unsigned int size)
66{
67	unsigned int i;
68	for (i = 0; i < size; i++)
69		((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
70}
71
72#define TO_NATIVE(x)						\
73({								\
74	typeof(x) __x;						\
75	__endian(&(x), &(__x), sizeof(__x));			\
76	__x;							\
77})
78
79#else /* endianness matches */
80
81#define TO_NATIVE(x) (x)
82
83#endif
84
85#define NOFAIL(ptr)   do_nofail((ptr), #ptr)
86void *do_nofail(void *ptr, const char *expr);
87
88struct buffer {
89	char *p;
90	int pos;
91	int size;
92};
93
94void __attribute__((format(printf, 2, 3)))
95buf_printf(struct buffer *buf, const char *fmt, ...);
96
97void
98buf_write(struct buffer *buf, const char *s, int len);
99
100struct module {
101	struct module *next;
102	const char *name;
103	struct symbol *unres;
104	int seen;
105	int skip;
106	int has_init;
107	int has_cleanup;
108	struct buffer dev_table_buf;
109	char	     srcversion[25];
110};
111
112struct elf_info {
113	unsigned long size;
114	Elf_Ehdr     *hdr;
115	Elf_Shdr     *sechdrs;
116	Elf_Sym      *symtab_start;
117	Elf_Sym      *symtab_stop;
118	const char   *strtab;
119	char	     *modinfo;
120	unsigned int modinfo_len;
121};
122
123/* file2alias.c */
124void handle_moddevtable(struct module *mod, struct elf_info *info,
125			Elf_Sym *sym, const char *symname);
126void add_moddevtable(struct buffer *buf, struct module *mod);
127
128/* sumversion.c */
129void maybe_frob_rcs_version(const char *modfilename,
130			    char *version,
131			    void *modinfo,
132			    unsigned long modinfo_offset);
133void get_src_version(const char *modname, char sum[], unsigned sumlen);
134
135/* from modpost.c */
136void *grab_file(const char *filename, unsigned long *size);
137char* get_next_line(unsigned long *pos, void *file, unsigned long size);
138void release_file(void *file, unsigned long size);
139
140void fatal(const char *fmt, ...);
141void warn(const char *fmt, ...);
142