[net-next-2.6.git] / scripts / mod / modpost.h

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <elf.h>

#include "elfconfig.h"

#if KERNEL_ELFCLASS == ELFCLASS32

#define Elf_Ehdr    Elf32_Ehdr
#define Elf_Shdr    Elf32_Shdr
#define Elf_Sym     Elf32_Sym
#define Elf_Addr    Elf32_Addr
#define Elf_Sword   Elf64_Sword
#define Elf_Section Elf32_Half
#define ELF_ST_BIND ELF32_ST_BIND
#define ELF_ST_TYPE ELF32_ST_TYPE

#define Elf_Rel     Elf32_Rel
#define Elf_Rela    Elf32_Rela
#define ELF_R_SYM   ELF32_R_SYM
#define ELF_R_TYPE  ELF32_R_TYPE
#else

#define Elf_Ehdr    Elf64_Ehdr
#define Elf_Shdr    Elf64_Shdr
#define Elf_Sym     Elf64_Sym
#define Elf_Addr    Elf64_Addr
#define Elf_Sword   Elf64_Sxword
#define Elf_Section Elf64_Half
#define ELF_ST_BIND ELF64_ST_BIND
#define ELF_ST_TYPE ELF64_ST_TYPE

#define Elf_Rel     Elf64_Rel
#define Elf_Rela    Elf64_Rela
#define ELF_R_SYM   ELF64_R_SYM
#define ELF_R_TYPE  ELF64_R_TYPE
#endif

/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
typedef struct
{
	Elf32_Word    r_sym;	/* Symbol index */
	unsigned char r_ssym;	/* Special symbol for 2nd relocation */
	unsigned char r_type3;	/* 3rd relocation type */
	unsigned char r_type2;	/* 2nd relocation type */
	unsigned char r_type1;	/* 1st relocation type */
} _Elf64_Mips_R_Info;

typedef union
{
	Elf64_Xword		r_info_number;
	_Elf64_Mips_R_Info	r_info_fields;
} _Elf64_Mips_R_Info_union;

#define ELF64_MIPS_R_SYM(i) \
  ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)

#define ELF64_MIPS_R_TYPE(i) \
  ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)

#if KERNEL_ELFDATA != HOST_ELFDATA

static inline void __endian(const void *src, void *dest, unsigned int size)
{
	unsigned int i;
	for (i = 0; i < size; i++)
		((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
}

#define TO_NATIVE(x)						\
({								\
	typeof(x) __x;						\
	__endian(&(x), &(__x), sizeof(__x));			\
	__x;							\
})

#else /* endianness matches */

#define TO_NATIVE(x) (x)

#endif

#define NOFAIL(ptr)   do_nofail((ptr), #ptr)
void *do_nofail(void *ptr, const char *expr);

struct buffer {
	char *p;
	int pos;
	int size;
};

void __attribute__((format(printf, 2, 3)))
buf_printf(struct buffer *buf, const char *fmt, ...);

void
buf_write(struct buffer *buf, const char *s, int len);

struct module {
	struct module *next;
	const char *name;
	int gpl_compatible;
	struct symbol *unres;
	int seen;
	int skip;
	int has_init;
	int has_cleanup;
	struct buffer dev_table_buf;
	char	     srcversion[25];
};

struct elf_info {
	unsigned long size;
	Elf_Ehdr     *hdr;
	Elf_Shdr     *sechdrs;
	Elf_Sym      *symtab_start;
	Elf_Sym      *symtab_stop;
	Elf_Section  export_sec;
	Elf_Section  export_unused_sec;
	Elf_Section  export_gpl_sec;
	Elf_Section  export_unused_gpl_sec;
	Elf_Section  export_gpl_future_sec;
	const char   *strtab;
	char	     *modinfo;
	unsigned int modinfo_len;

	/* support for 32bit section numbers */

	unsigned int num_sections; /* max_secindex + 1 */
	unsigned int secindex_strings;
	/* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
	 * take shndx from symtab_shndx_start[N] instead */
	Elf32_Word   *symtab_shndx_start;
	Elf32_Word   *symtab_shndx_stop;
};

static inline int is_shndx_special(unsigned int i)
{
	return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
}

/* shndx is in [0..SHN_LORESERVE) U (SHN_HIRESERVE, 0xfffffff], thus:
 * shndx == 0               <=> sechdrs[0]
 * ......
 * shndx == SHN_LORESERVE-1 <=> sechdrs[SHN_LORESERVE-1]
 * shndx == SHN_HIRESERVE+1 <=> sechdrs[SHN_LORESERVE]
 * shndx == SHN_HIRESERVE+2 <=> sechdrs[SHN_LORESERVE+1]
 * ......
 * fyi: sym->st_shndx is uint16, SHN_LORESERVE = ff00, SHN_HIRESERVE = ffff,
 * so basically we map  0000..feff -> 0000..feff
 *                      ff00..ffff -> (you are a bad boy, dont do it)
 *                     10000..xxxx -> ff00..(xxxx-0x100)
 */
static inline unsigned int shndx2secindex(unsigned int i)
{
	if (i <= SHN_HIRESERVE)
		return i;
	return i - (SHN_HIRESERVE + 1 - SHN_LORESERVE);
}

/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
static inline unsigned int get_secindex(const struct elf_info *info,
					const Elf_Sym *sym)
{
	if (sym->st_shndx != SHN_XINDEX)
		return sym->st_shndx;
	return shndx2secindex(info->symtab_shndx_start[sym -
						       info->symtab_start]);
}

/* file2alias.c */
extern unsigned int cross_build;
void handle_moddevtable(struct module *mod, struct elf_info *info,
			Elf_Sym *sym, const char *symname);
void add_moddevtable(struct buffer *buf, struct module *mod);

/* sumversion.c */
void maybe_frob_rcs_version(const char *modfilename,
			    char *version,
			    void *modinfo,
			    unsigned long modinfo_offset);
void get_src_version(const char *modname, char sum[], unsigned sumlen);

/* from modpost.c */
void *grab_file(const char *filename, unsigned long *size);
char* get_next_line(unsigned long *pos, void *file, unsigned long size);
void release_file(void *file, unsigned long size);

void fatal(const char *fmt, ...);
void warn(const char *fmt, ...);
void merror(const char *fmt, ...);
Commit	Line	Data
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
	14	#if KERNEL_ELFCLASS == ELFCLASS32
	15
62070fa4 SR	16	#define Elf_Ehdr Elf32_Ehdr
62070fa4 SR	17	#define Elf_Shdr Elf32_Shdr
1da177e4	18	#define Elf_Sym Elf32_Sym
b39927cf	19	#define Elf_Addr Elf32_Addr
9ad21c3f	20	#define Elf_Sword Elf64_Sword
4f4c4ee1	21	#define Elf_Section Elf32_Half
1da177e4 LT	22	#define ELF_ST_BIND ELF32_ST_BIND
	23	#define ELF_ST_TYPE ELF32_ST_TYPE
	24
2c1a51f3	25	#define Elf_Rel Elf32_Rel
b39927cf SR	26	#define Elf_Rela Elf32_Rela
	27	#define ELF_R_SYM ELF32_R_SYM
	28	#define ELF_R_TYPE ELF32_R_TYPE
1da177e4 LT	29	#else
1da177e4 LT	30
62070fa4 SR	31	#define Elf_Ehdr Elf64_Ehdr
62070fa4 SR	32	#define Elf_Shdr Elf64_Shdr
1da177e4	33	#define Elf_Sym Elf64_Sym
b39927cf	34	#define Elf_Addr Elf64_Addr
9ad21c3f	35	#define Elf_Sword Elf64_Sxword
4f4c4ee1	36	#define Elf_Section Elf64_Half
1da177e4 LT	37	#define ELF_ST_BIND ELF64_ST_BIND
	38	#define ELF_ST_TYPE ELF64_ST_TYPE
	39
2c1a51f3	40	#define Elf_Rel Elf64_Rel
b39927cf SR	41	#define Elf_Rela Elf64_Rela
	42	#define ELF_R_SYM ELF64_R_SYM
	43	#define ELF_R_TYPE ELF64_R_TYPE
1da177e4 LT	44	#endif
1da177e4 LT	45
eae07ac6 AN	46	/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
	47	typedef 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
	56	typedef 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
ae4ac123 AN	65	#define ELF64_MIPS_R_TYPE(i) \
	66	((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)
	67
1da177e4 LT	68	#if KERNEL_ELFDATA != HOST_ELFDATA
	69
	70	static 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
1da177e4 LT	77	#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)
	91	void do_nofail(void ptr, const char *expr);
	92
	93	struct buffer {
	94	char *p;
	95	int pos;
	96	int size;
	97	};
	98
	99	void __attribute__((format(printf, 2, 3)))
	100	buf_printf(struct buffer buf, const char fmt, ...);
	101
	102	void
	103	buf_write(struct buffer buf, const char s, int len);
	104
	105	struct module {
	106	struct module *next;
	107	const char *name;
b817f6fe	108	int gpl_compatible;
1da177e4 LT	109	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
	118	struct elf_info {
	119	unsigned long size;
	120	Elf_Ehdr *hdr;
	121	Elf_Shdr *sechdrs;
	122	Elf_Sym *symtab_start;
	123	Elf_Sym *symtab_stop;
bd5cbced	124	Elf_Section export_sec;
c96fca21	125	Elf_Section export_unused_sec;
bd5cbced	126	Elf_Section export_gpl_sec;
c96fca21	127	Elf_Section export_unused_gpl_sec;
bd5cbced	128	Elf_Section export_gpl_future_sec;
1da177e4 LT	129	const char *strtab;
	130	char *modinfo;
	131	unsigned int modinfo_len;
1ce53adf DV	132
	133	/* support for 32bit section numbers */
	134
	135	unsigned int num_sections; /* max_secindex + 1 */
	136	unsigned int secindex_strings;
	137	/* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
	138	* take shndx from symtab_shndx_start[N] instead */
	139	Elf32_Word *symtab_shndx_start;
	140	Elf32_Word *symtab_shndx_stop;
1da177e4 LT	141	};
1da177e4 LT	142
1ce53adf DV	143	static inline int is_shndx_special(unsigned int i)
	144	{
	145	return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
	146	}
	147
	148	/* shndx is in [0..SHN_LORESERVE) U (SHN_HIRESERVE, 0xfffffff], thus:
	149	* shndx == 0 <=> sechdrs[0]
	150	* ......
	151	* shndx == SHN_LORESERVE-1 <=> sechdrs[SHN_LORESERVE-1]
	152	* shndx == SHN_HIRESERVE+1 <=> sechdrs[SHN_LORESERVE]
	153	* shndx == SHN_HIRESERVE+2 <=> sechdrs[SHN_LORESERVE+1]
	154	* ......
	155	* fyi: sym->st_shndx is uint16, SHN_LORESERVE = ff00, SHN_HIRESERVE = ffff,
	156	* so basically we map 0000..feff -> 0000..feff
	157	* ff00..ffff -> (you are a bad boy, dont do it)
	158	* 10000..xxxx -> ff00..(xxxx-0x100)
	159	*/
	160	static inline unsigned int shndx2secindex(unsigned int i)
	161	{
	162	if (i <= SHN_HIRESERVE)
	163	return i;
	164	return i - (SHN_HIRESERVE + 1 - SHN_LORESERVE);
	165	}
	166
	167	/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
	168	static inline unsigned int get_secindex(const struct elf_info *info,
	169	const Elf_Sym *sym)
	170	{
	171	if (sym->st_shndx != SHN_XINDEX)
	172	return sym->st_shndx;
	173	return shndx2secindex(info->symtab_shndx_start[sym -
	174	info->symtab_start]);
	175	}
	176
cb80514d	177	/* file2alias.c */
4ce6efed	178	extern unsigned int cross_build;
1da177e4 LT	179	void handle_moddevtable(struct module mod, struct elf_info info,
1da177e4 LT	180	Elf_Sym sym, const char symname);
1da177e4 LT	181	void add_moddevtable(struct buffer buf, struct module mod);
1da177e4 LT	182
cb80514d	183	/* sumversion.c */
1da177e4 LT	184	void maybe_frob_rcs_version(const char *modfilename,
	185	char *version,
	186	void *modinfo,
	187	unsigned long modinfo_offset);
	188	void get_src_version(const char *modname, char sum[], unsigned sumlen);
	189
cb80514d	190	/* from modpost.c */
1da177e4 LT	191	void grab_file(const char filename, unsigned long *size);
	192	char* get_next_line(unsigned long pos, void file, unsigned long size);
	193	void release_file(void *file, unsigned long size);
cb80514d SR	194
	195	void fatal(const char *fmt, ...);
	196	void warn(const char *fmt, ...);
2a116659	197	void merror(const char *fmt, ...);