target/linux/generic/patches-3.2/220-module_exports.patch

   1 --- a/include/asm-generic/vmlinux.lds.h
   2 +++ b/include/asm-generic/vmlinux.lds.h
   3 @@ -52,6 +52,27 @@
   4  #define LOAD_OFFSET 0
   5  #endif
   6
   7 +#ifndef SYMTAB_KEEP_STR
   8 +#define SYMTAB_KEEP_STR *(__ksymtab_strings+*)
   9 +#define SYMTAB_DISCARD_STR
  10 +#else
  11 +#define SYMTAB_DISCARD_STR *(__ksymtab_strings+*)
  12 +#endif
  13 +
  14 +#ifndef SYMTAB_KEEP
  15 +#define SYMTAB_KEEP *(SORT(___ksymtab+*))
  16 +#define SYMTAB_DISCARD
  17 +#else
  18 +#define SYMTAB_DISCARD *(SORT(___ksymtab+*))
  19 +#endif
  20 +
  21 +#ifndef SYMTAB_KEEP_GPL
  22 +#define SYMTAB_KEEP_GPL *(SORT(___ksymtab_gpl+*))
  23 +#define SYMTAB_DISCARD_GPL
  24 +#else
  25 +#define SYMTAB_DISCARD_GPL *(SORT(___ksymtab_gpl+*))
  26 +#endif
  27 +
  28  #ifndef SYMBOL_PREFIX
  29  #define VMLINUX_SYMBOL(sym) sym
  30  #else
  31 @@ -275,14 +296,14 @@
  32         /* Kernel symbol table: Normal symbols */                       \
  33         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
  34                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
  35 -               *(SORT(___ksymtab+*))                                   \
  36 +               SYMTAB_KEEP                                             \
  37                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
  38         }                                                               \
  39                                                                         \
  40         /* Kernel symbol table: GPL-only symbols */                     \
  41         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
  42                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
  43 -               *(SORT(___ksymtab_gpl+*))                               \
  44 +               SYMTAB_KEEP_GPL                                         \
  45                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
  46         }                                                               \
  47                                                                         \
  48 @@ -344,7 +365,7 @@
  49                                                                         \
  50         /* Kernel symbol table: strings */                              \
  51          __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {        \
  52 -               *(__ksymtab_strings)                                    \
  53 +               SYMTAB_KEEP_STR                                         \
  54         }                                                               \
  55                                                                         \
  56         /* __*init sections */                                          \
  57 @@ -676,6 +697,9 @@
  58         EXIT_TEXT                                                       \
  59         EXIT_DATA                                                       \
  60         EXIT_CALL                                                       \
  61 +       SYMTAB_DISCARD                                                  \
  62 +       SYMTAB_DISCARD_GPL                                              \
  63 +       SYMTAB_DISCARD_STR                                              \
  64         *(.discard)                                                     \
  65         *(.discard.*)                                                   \
  66         }
  67 --- a/include/linux/export.h
  68 +++ b/include/linux/export.h
  69 @@ -45,12 +45,19 @@ extern struct module __this_module;
  70  #define __CRC_SYMBOL(sym, sec)
  71  #endif
  72
  73 +#ifdef MODULE
  74 +#define __EXPORT_SUFFIX(sym)
  75 +#else
  76 +#define __EXPORT_SUFFIX(sym) "+" #sym
  77 +#endif
  78 +
  79  /* For every exported symbol, place a struct in the __ksymtab section */
  80  #define __EXPORT_SYMBOL(sym, sec)                              \
  81         extern typeof(sym) sym;                                 \
  82         __CRC_SYMBOL(sym, sec)                                  \
  83         static const char __kstrtab_##sym[]                     \
  84 -       __attribute__((section("__ksymtab_strings"), aligned(1))) \
  85 +       __attribute__((section("__ksymtab_strings"              \
  86 +         __EXPORT_SUFFIX(sym)), aligned(1)))                   \
  87         = MODULE_SYMBOL_PREFIX #sym;                            \
  88         static const struct kernel_symbol __ksymtab_##sym       \
  89         __used                                                  \