xref: /openbmc/linux/scripts/mod/modpost.h (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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. */
45 typedef 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 
54 typedef 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 
65 static 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)
86 void *do_nofail(void *ptr, const char *expr);
87 
88 struct buffer {
89 	char *p;
90 	int pos;
91 	int size;
92 };
93 
94 void __attribute__((format(printf, 2, 3)))
95 buf_printf(struct buffer *buf, const char *fmt, ...);
96 
97 void
98 buf_write(struct buffer *buf, const char *s, int len);
99 
100 struct module {
101 	struct module *next;
102 	const char *name;
103 	int gpl_compatible;
104 	struct symbol *unres;
105 	int seen;
106 	int skip;
107 	int has_init;
108 	int has_cleanup;
109 	struct buffer dev_table_buf;
110 	char	     srcversion[25];
111 };
112 
113 struct elf_info {
114 	unsigned long size;
115 	Elf_Ehdr     *hdr;
116 	Elf_Shdr     *sechdrs;
117 	Elf_Sym      *symtab_start;
118 	Elf_Sym      *symtab_stop;
119 	Elf_Section  export_sec;
120 	Elf_Section  export_unused_sec;
121 	Elf_Section  export_gpl_sec;
122 	Elf_Section  export_unused_gpl_sec;
123 	Elf_Section  export_gpl_future_sec;
124 	const char   *strtab;
125 	char	     *modinfo;
126 	unsigned int modinfo_len;
127 };
128 
129 /* file2alias.c */
130 void handle_moddevtable(struct module *mod, struct elf_info *info,
131 			Elf_Sym *sym, const char *symname);
132 void add_moddevtable(struct buffer *buf, struct module *mod);
133 
134 /* sumversion.c */
135 void maybe_frob_rcs_version(const char *modfilename,
136 			    char *version,
137 			    void *modinfo,
138 			    unsigned long modinfo_offset);
139 void get_src_version(const char *modname, char sum[], unsigned sumlen);
140 
141 /* from modpost.c */
142 void *grab_file(const char *filename, unsigned long *size);
143 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
144 void release_file(void *file, unsigned long size);
145 
146 void fatal(const char *fmt, ...);
147 void warn(const char *fmt, ...);
148 void merror(const char *fmt, ...);
149