target/linux/generic/patches-2.6.36/028-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 *(__ksymtab.*)
  16 +#define SYMTAB_DISCARD
  17 +#else
  18 +#define SYMTAB_DISCARD *(__ksymtab.*)
  19 +#endif
  20 +
  21 +#ifndef SYMTAB_KEEP_GPL
  22 +#define SYMTAB_KEEP_GPL *(__ksymtab_gpl.*)
  23 +#define SYMTAB_DISCARD_GPL
  24 +#else
  25 +#define SYMTAB_DISCARD_GPL *(__ksymtab_gpl.*)
  26 +#endif
  27 +
  28  #ifndef SYMBOL_PREFIX
  29  #define VMLINUX_SYMBOL(sym) sym
  30  #else
  31 @@ -264,35 +285,35 @@
  32         /* Kernel symbol table: Normal symbols */                       \
  33         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
  34                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
  35 -               *(__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 -               *(__ksymtab_gpl)                                        \
  44 +               SYMTAB_KEEP_GPL                                         \
  45                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
  46         }                                                               \
  47                                                                         \
  48         /* Kernel symbol table: Normal unused symbols */                \
  49         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
  50                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
  51 -               *(__ksymtab_unused)                                     \
  52 +               *(__ksymtab_unused.*)                                   \
  53                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
  54         }                                                               \
  55                                                                         \
  56         /* Kernel symbol table: GPL-only unused symbols */              \
  57         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
  58                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
  59 -               *(__ksymtab_unused_gpl)                                 \
  60 +               *(__ksymtab_unused_gpl.*)                               \
  61                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
  62         }                                                               \
  63                                                                         \
  64         /* Kernel symbol table: GPL-future-only symbols */              \
  65         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
  66                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
  67 -               *(__ksymtab_gpl_future)                                 \
  68 +               *(__ksymtab_gpl_future.*)                               \
  69                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
  70         }                                                               \
  71                                                                         \
  72 @@ -333,7 +354,7 @@
  73                                                                         \
  74         /* Kernel symbol table: strings */                              \
  75          __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {        \
  76 -               *(__ksymtab_strings)                                    \
  77 +               SYMTAB_KEEP_STR                                         \
  78         }                                                               \
  79                                                                         \
  80         /* __*init sections */                                          \
  81 @@ -648,6 +669,9 @@
  82         EXIT_TEXT                                                       \
  83         EXIT_DATA                                                       \
  84         EXIT_CALL                                                       \
  85 +       SYMTAB_DISCARD                                                  \
  86 +       SYMTAB_DISCARD_GPL                                              \
  87 +       SYMTAB_DISCARD_STR                                              \
  88         *(.discard)                                                     \
  89         *(.discard.*)                                                   \
  90         }
  91 --- a/include/linux/module.h
  92 +++ b/include/linux/module.h
  93 @@ -202,16 +202,24 @@ struct module_use {
  94  #define __CRC_SYMBOL(sym, sec)
  95  #endif
  96
  97 +#ifdef MODULE
  98 +#define __EXPORT_SUFFIX(sym)
  99 +#else
 100 +#define __EXPORT_SUFFIX(sym) "." #sym
 101 +#endif
 102 +
 103  /* For every exported symbol, place a struct in the __ksymtab section */
 104  #define __EXPORT_SYMBOL(sym, sec)                              \
 105         extern typeof(sym) sym;                                 \
 106         __CRC_SYMBOL(sym, sec)                                  \
 107         static const char __kstrtab_##sym[]                     \
 108 -       __attribute__((section("__ksymtab_strings"), aligned(1))) \
 109 +       __attribute__((section("__ksymtab_strings"              \
 110 +         __EXPORT_SUFFIX(sym)), aligned(1)))                   \
 111         = MODULE_SYMBOL_PREFIX #sym;                            \
 112         static const struct kernel_symbol __ksymtab_##sym       \
 113         __used                                                  \
 114 -       __attribute__((section("__ksymtab" sec), unused))       \
 115 +       __attribute__((section("__ksymtab" sec                  \
 116 +         __EXPORT_SUFFIX(sym)), unused))                       \
 117         = { (unsigned long)&sym, __kstrtab_##sym }
 118
 119  #define EXPORT_SYMBOL(sym)                                     \