194 lines
4.8 KiB
C
194 lines
4.8 KiB
C
#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, ...);
|