target/linux/generic/patches-3.12/221-module_exports.patch

   1 --- a/include/asm-generic/vmlinux.lds.h
   2 +++ b/include/asm-generic/vmlinux.lds.h
   3 @@ -52,6 +52,16 @@
   4  #define LOAD_OFFSET 0
   5  #endif
   6
   7 +#ifndef SYMTAB_KEEP
   8 +#define SYMTAB_KEEP KEEP(*(SORT(___ksymtab+*)))
   9 +#define SYMTAB_KEEP_GPL KEEP(*(SORT(___ksymtab_gpl+*)))
  10 +#endif
  11 +
  12 +#ifndef SYMTAB_DISCARD
  13 +#define SYMTAB_DISCARD
  14 +#define SYMTAB_DISCARD_GPL
  15 +#endif
  16 +
  17  #include <linux/export.h>
  18
  19  /* Align . to a 8 byte boundary equals to maximum function alignment. */
  20 @@ -284,14 +294,14 @@
  21         /* Kernel symbol table: Normal symbols */                       \
  22         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
  23                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
  24 -               KEEP(*(SORT(___ksymtab+*)))                             \
  25 +               SYMTAB_KEEP                                             \
  26                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
  27         }                                                               \
  28                                                                         \
  29         /* Kernel symbol table: GPL-only symbols */                     \
  30         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
  31                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
  32 -               KEEP(*(SORT(___ksymtab_gpl+*)))                         \
  33 +               SYMTAB_KEEP_GPL                                         \
  34                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
  35         }                                                               \
  36                                                                         \
  37 @@ -353,7 +363,7 @@
  38                                                                         \
  39         /* Kernel symbol table: strings */                              \
  40          __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {        \
  41 -               *(__ksymtab_strings)                                    \
  42 +               *(__ksymtab_strings+*)                                  \
  43         }                                                               \
  44                                                                         \
  45         /* __*init sections */                                          \
  46 @@ -670,6 +680,8 @@
  47         EXIT_TEXT                                                       \
  48         EXIT_DATA                                                       \
  49         EXIT_CALL                                                       \
  50 +       SYMTAB_DISCARD                                                  \
  51 +       SYMTAB_DISCARD_GPL                                              \
  52         *(.discard)                                                     \
  53         *(.discard.*)                                                   \
  54         }
  55 --- a/scripts/Makefile.build
  56 +++ b/scripts/Makefile.build
  57 @@ -349,7 +349,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(
  58  # Linker scripts preprocessor (.lds.S -> .lds)
  59  # ---------------------------------------------------------------------------
  60  quiet_cmd_cpp_lds_S = LDS     $@
  61 -      cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
  62 +      cmd_cpp_lds_S = $(CPP) $(EXTRA_LDSFLAGS) $(cpp_flags) -P -C -U$(ARCH) \
  63                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
  64
  65  $(obj)/%.lds: $(src)/%.lds.S FORCE
  66 --- a/include/linux/export.h
  67 +++ b/include/linux/export.h
  68 @@ -52,12 +52,19 @@ extern struct module __this_module;
  69  #define __CRC_SYMBOL(sym, sec)
  70  #endif
  71
  72 +#ifdef MODULE
  73 +#define __EXPORT_SUFFIX(sym)
  74 +#else
  75 +#define __EXPORT_SUFFIX(sym) "+" #sym
  76 +#endif
  77 +
  78  /* For every exported symbol, place a struct in the __ksymtab section */
  79  #define __EXPORT_SYMBOL(sym, sec)                              \
  80         extern typeof(sym) sym;                                 \
  81         __CRC_SYMBOL(sym, sec)                                  \
  82         static const char __kstrtab_##sym[]                     \
  83 -       __attribute__((section("__ksymtab_strings"), aligned(1))) \
  84 +       __attribute__((section("__ksymtab_strings"              \
  85 +         __EXPORT_SUFFIX(sym)), aligned(1)))                   \
  86         = VMLINUX_SYMBOL_STR(sym);                              \
  87         static const struct kernel_symbol __ksymtab_##sym       \
  88         __used                                                  \