scripts/mod/modpost.h

   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_ST_BIND ELF32_ST_BIND
  20 #define ELF_ST_TYPE ELF32_ST_TYPE
  21
  22 #else
  23
  24 #define Elf_Ehdr    Elf64_Ehdr
  25 #define Elf_Shdr    Elf64_Shdr
  26 #define Elf_Sym     Elf64_Sym
  27 #define ELF_ST_BIND ELF64_ST_BIND
  28 #define ELF_ST_TYPE ELF64_ST_TYPE
  29
  30 #endif
  31
  32 #if KERNEL_ELFDATA != HOST_ELFDATA
  33
  34 static inline void __endian(const void *src, void *dest, unsigned int size)
  35 {
  36         unsigned int i;
  37         for (i = 0; i < size; i++)
  38                 ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
  39 }
  40
  41
  42
  43 #define TO_NATIVE(x)                                            \
  44 ({                                                              \
  45         typeof(x) __x;                                          \
  46         __endian(&(x), &(__x), sizeof(__x));                    \
  47         __x;                                                    \
  48 })
  49
  50 #else /* endianness matches */
  51
  52 #define TO_NATIVE(x) (x)
  53
  54 #endif
  55
  56 #define NOFAIL(ptr)   do_nofail((ptr), __FILE__, __LINE__, #ptr)
  57 void *do_nofail(void *ptr, const char *file, int line, const char *expr);
  58
  59 struct buffer {
  60         char *p;
  61         int pos;
  62         int size;
  63 };
  64
  65 void __attribute__((format(printf, 2, 3)))
  66 buf_printf(struct buffer *buf, const char *fmt, ...);
  67
  68 void
  69 buf_write(struct buffer *buf, const char *s, int len);
  70
  71 struct module {
  72         struct module *next;
  73         const char *name;
  74         struct symbol *unres;
  75         int seen;
  76         int skip;
  77         int has_init;
  78         int has_cleanup;
  79         struct buffer dev_table_buf;
  80 };
  81
  82 struct elf_info {
  83         unsigned long size;
  84         Elf_Ehdr     *hdr;
  85         Elf_Shdr     *sechdrs;
  86         Elf_Sym      *symtab_start;
  87         Elf_Sym      *symtab_stop;
  88         const char   *strtab;
  89         char         *modinfo;
  90         unsigned int modinfo_len;
  91 };
  92
  93 void handle_moddevtable(struct module *mod, struct elf_info *info,
  94                         Elf_Sym *sym, const char *symname);
  95
  96 void add_moddevtable(struct buffer *buf, struct module *mod);
  97
  98 void maybe_frob_version(const char *modfilename,
  99                         void *modinfo,
 100                         unsigned long modinfo_len,
 101                         unsigned long modinfo_offset);
 102
 103 void *grab_file(const char *filename, unsigned long *size);
 104 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
 105 void release_file(void *file, unsigned long size);