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_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_Rela    Elf32_Rela
  25 #define ELF_R_SYM   ELF32_R_SYM
  26 #define ELF_R_TYPE  ELF32_R_TYPE
  27 #else
  28
  29 #define Elf_Ehdr    Elf64_Ehdr
  30 #define Elf_Shdr    Elf64_Shdr
  31 #define Elf_Sym     Elf64_Sym
  32 #define Elf_Addr    Elf64_Addr
  33 #define Elf_Section Elf64_Section
  34 #define ELF_ST_BIND ELF64_ST_BIND
  35 #define ELF_ST_TYPE ELF64_ST_TYPE
  36
  37 #define Elf_Rela    Elf64_Rela
  38 #define ELF_R_SYM   ELF64_R_SYM
  39 #define ELF_R_TYPE  ELF64_R_TYPE
  40 #endif
  41
  42 #if KERNEL_ELFDATA != HOST_ELFDATA
  43
  44 static inline void __endian(const void *src, void *dest, unsigned int size)
  45 {
  46         unsigned int i;
  47         for (i = 0; i < size; i++)
  48                 ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
  49 }
  50
  51
  52
  53 #define TO_NATIVE(x)                                            \
  54 ({                                                              \
  55         typeof(x) __x;                                          \
  56         __endian(&(x), &(__x), sizeof(__x));                    \
  57         __x;                                                    \
  58 })
  59
  60 #else /* endianness matches */
  61
  62 #define TO_NATIVE(x) (x)
  63
  64 #endif
  65
  66 #define NOFAIL(ptr)   do_nofail((ptr), #ptr)
  67 void *do_nofail(void *ptr, const char *expr);
  68
  69 struct buffer {
  70         char *p;
  71         int pos;
  72         int size;
  73 };
  74
  75 void __attribute__((format(printf, 2, 3)))
  76 buf_printf(struct buffer *buf, const char *fmt, ...);
  77
  78 void
  79 buf_write(struct buffer *buf, const char *s, int len);
  80
  81 struct module {
  82         struct module *next;
  83         const char *name;
  84         struct symbol *unres;
  85         int seen;
  86         int skip;
  87         int has_init;
  88         int has_cleanup;
  89         struct buffer dev_table_buf;
  90         char         srcversion[25];
  91 };
  92
  93 struct elf_info {
  94         unsigned long size;
  95         Elf_Ehdr     *hdr;
  96         Elf_Shdr     *sechdrs;
  97         Elf_Sym      *symtab_start;
  98         Elf_Sym      *symtab_stop;
  99         const char   *strtab;
 100         char         *modinfo;
 101         unsigned int modinfo_len;
 102 };
 103
 104 /* file2alias.c */
 105 void handle_moddevtable(struct module *mod, struct elf_info *info,
 106                         Elf_Sym *sym, const char *symname);
 107 void add_moddevtable(struct buffer *buf, struct module *mod);
 108
 109 /* sumversion.c */
 110 void maybe_frob_rcs_version(const char *modfilename,
 111                             char *version,
 112                             void *modinfo,
 113                             unsigned long modinfo_offset);
 114 void get_src_version(const char *modname, char sum[], unsigned sumlen);
 115
 116 /* from modpost.c */
 117 void *grab_file(const char *filename, unsigned long *size);
 118 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
 119 void release_file(void *file, unsigned long size);
 120
 121 void fatal(const char *fmt, ...);
 122 void warn(const char *fmt, ...);