--- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -52,6 +52,27 @@ #define LOAD_OFFSET 0 #endif +#ifndef SYMTAB_KEEP_STR +#define SYMTAB_KEEP_STR *(__ksymtab_strings+*) +#define SYMTAB_DISCARD_STR +#else +#define SYMTAB_DISCARD_STR *(__ksymtab_strings+*) +#endif + +#ifndef SYMTAB_KEEP +#define SYMTAB_KEEP *(SORT(___ksymtab+*)) +#define SYMTAB_DISCARD +#else +#define SYMTAB_DISCARD *(SORT(___ksymtab+*)) +#endif + +#ifndef SYMTAB_KEEP_GPL +#define SYMTAB_KEEP_GPL *(SORT(___ksymtab_gpl+*)) +#define SYMTAB_DISCARD_GPL +#else +#define SYMTAB_DISCARD_GPL *(SORT(___ksymtab_gpl+*)) +#endif + #ifndef SYMBOL_PREFIX #define VMLINUX_SYMBOL(sym) sym #else @@ -275,14 +296,14 @@ /* Kernel symbol table: Normal symbols */ \ __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___ksymtab) = .; \ - *(SORT(___ksymtab+*)) \ + SYMTAB_KEEP \ VMLINUX_SYMBOL(__stop___ksymtab) = .; \ } \ \ /* Kernel symbol table: GPL-only symbols */ \ __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ - *(SORT(___ksymtab_gpl+*)) \ + SYMTAB_KEEP_GPL \ VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ } \ \ @@ -344,7 +365,7 @@ \ /* Kernel symbol table: strings */ \ __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ - *(__ksymtab_strings) \ + SYMTAB_KEEP_STR \ } \ \ /* __*init sections */ \ @@ -676,6 +697,9 @@ EXIT_TEXT \ EXIT_DATA \ EXIT_CALL \ + SYMTAB_DISCARD \ + SYMTAB_DISCARD_GPL \ + SYMTAB_DISCARD_STR \ *(.discard) \ *(.discard.*) \ } --- a/include/linux/export.h +++ b/include/linux/export.h @@ -45,12 +45,19 @@ extern struct module __this_module; #define __CRC_SYMBOL(sym, sec) #endif +#ifdef MODULE +#define __EXPORT_SUFFIX(sym) +#else +#define __EXPORT_SUFFIX(sym) "+" #sym +#endif + /* For every exported symbol, place a struct in the __ksymtab section */ #define __EXPORT_SYMBOL(sym, sec) \ extern typeof(sym) sym; \ __CRC_SYMBOL(sym, sec) \ static const char __kstrtab_##sym[] \ - __attribute__((section("__ksymtab_strings"), aligned(1))) \ + __attribute__((section("__ksymtab_strings" \ + __EXPORT_SUFFIX(sym)), aligned(1))) \ = MODULE_SYMBOL_PREFIX #sym; \ static const struct kernel_symbol __ksymtab_##sym \ __used \