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_Half
  21 #define ELF_ST_BIND ELF32_ST_BIND
  22 #define ELF_ST_TYPE ELF32_ST_TYPE
  23
  24 #define Elf_Rel     Elf32_Rel
  25 #define Elf_Rela    Elf32_Rela
  26 #define ELF_R_SYM   ELF32_R_SYM
  27 #define ELF_R_TYPE  ELF32_R_TYPE
  28 #else
  29
  30 #define Elf_Ehdr    Elf64_Ehdr
  31 #define Elf_Shdr    Elf64_Shdr
  32 #define Elf_Sym     Elf64_Sym
  33 #define Elf_Addr    Elf64_Addr
  34 #define Elf_Section Elf64_Half
  35 #define ELF_ST_BIND ELF64_ST_BIND
  36 #define ELF_ST_TYPE ELF64_ST_TYPE
  37
  38 #define Elf_Rel     Elf64_Rel
  39 #define Elf_Rela    Elf64_Rela
  40 #define ELF_R_SYM   ELF64_R_SYM
  41 #define ELF_R_TYPE  ELF64_R_TYPE
  42 #endif
  43
  44 /* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
  45 typedef struct
  46 {
  47         Elf32_Word    r_sym;    /* Symbol index */
  48         unsigned char r_ssym;   /* Special symbol for 2nd relocation */
  49         unsigned char r_type3;  /* 3rd relocation type */
  50         unsigned char r_type2;  /* 2nd relocation type */
  51         unsigned char r_type1;  /* 1st relocation type */
  52 } _Elf64_Mips_R_Info;
  53
  54 typedef union
  55 {
  56         Elf64_Xword             r_info_number;
  57         _Elf64_Mips_R_Info      r_info_fields;
  58 } _Elf64_Mips_R_Info_union;
  59
  60 #define ELF64_MIPS_R_SYM(i) \
  61   ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
  62
  63 #define ELF64_MIPS_R_TYPE(i) \
  64   ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)
  65
  66 #if KERNEL_ELFDATA != HOST_ELFDATA
  67
  68 static inline void __endian(const void *src, void *dest, unsigned int size)
  69 {
  70         unsigned int i;
  71         for (i = 0; i < size; i++)
  72                 ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
  73 }
  74
  75 #define TO_NATIVE(x)                                            \
  76 ({                                                              \
  77         typeof(x) __x;                                          \
  78         __endian(&(x), &(__x), sizeof(__x));                    \
  79         __x;                                                    \
  80 })
  81
  82 #else /* endianness matches */
  83
  84 #define TO_NATIVE(x) (x)
  85
  86 #endif
  87
  88 #define NOFAIL(ptr)   do_nofail((ptr), #ptr)
  89 void *do_nofail(void *ptr, const char *expr);
  90
  91 struct buffer {
  92         char *p;
  93         int pos;
  94         int size;
  95 };
  96
  97 void __attribute__((format(printf, 2, 3)))
  98 buf_printf(struct buffer *buf, const char *fmt, ...);
  99
 100 void
 101 buf_write(struct buffer *buf, const char *s, int len);
 102
 103 struct module {
 104         struct module *next;
 105         const char *name;
 106         int gpl_compatible;
 107         struct symbol *unres;
 108         int seen;
 109         int skip;
 110         int has_init;
 111         int has_cleanup;
 112         struct buffer dev_table_buf;
 113         char         srcversion[25];
 114 };
 115
 116 struct elf_info {
 117         unsigned long size;
 118         Elf_Ehdr     *hdr;
 119         Elf_Shdr     *sechdrs;
 120         Elf_Sym      *symtab_start;
 121         Elf_Sym      *symtab_stop;
 122         Elf_Section  export_sec;
 123         Elf_Section  export_unused_sec;
 124         Elf_Section  export_gpl_sec;
 125         Elf_Section  export_unused_gpl_sec;
 126         Elf_Section  export_gpl_future_sec;
 127         const char   *strtab;
 128         char         *modinfo;
 129         unsigned int modinfo_len;
 130 };
 131
 132 /* file2alias.c */
 133 void handle_moddevtable(struct module *mod, struct elf_info *info,
 134                         Elf_Sym *sym, const char *symname);
 135 void add_moddevtable(struct buffer *buf, struct module *mod);
 136
 137 /* sumversion.c */
 138 void maybe_frob_rcs_version(const char *modfilename,
 139                             char *version,
 140                             void *modinfo,
 141                             unsigned long modinfo_offset);
 142 void get_src_version(const char *modname, char sum[], unsigned sumlen);
 143
 144 /* from modpost.c */
 145 void *grab_file(const char *filename, unsigned long *size);
 146 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
 147 void release_file(void *file, unsigned long size);
 148
 149 void fatal(const char *fmt, ...);
 150 void warn(const char *fmt, ...);
 151 void merror(const char *fmt, ...);