[people/arne_f/kernel.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"

/* On BSD-alike OSes elf.h defines these according to host's word size */
#undef ELF_ST_BIND
#undef ELF_ST_TYPE
#undef ELF_R_SYM
#undef ELF_R_TYPE

#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];
	int is_dot_o;
};

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;
	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;
}

/*
 * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
 * the way to -256..-1, to avoid conflicting with real section
 * indices.
 */
#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1))

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