diff options
Diffstat (limited to 'include/linux/export.h')
| -rw-r--r-- | include/linux/export.h | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/include/linux/export.h b/include/linux/export.h index 627841448293..fceb5e855717 100644 --- a/include/linux/export.h +++ b/include/linux/export.h @@ -82,16 +82,29 @@ struct kernel_symbol { #else -/* For every exported symbol, place a struct in the __ksymtab section */ -#define ___EXPORT_SYMBOL(sym, sec, ns) \ - extern typeof(sym) sym; \ - __CRC_SYMBOL(sym, sec); \ - static const char __kstrtab_##sym[] \ - __attribute__((section("__ksymtab_strings"), used, aligned(1))) \ - = #sym; \ - static const char __kstrtabns_##sym[] \ - __attribute__((section("__ksymtab_strings"), used, aligned(1))) \ - = ns; \ +/* + * For every exported symbol, do the following: + * + * - If applicable, place a CRC entry in the __kcrctab section. + * - Put the name of the symbol and namespace (empty string "" for none) in + * __ksymtab_strings. + * - Place a struct kernel_symbol entry in the __ksymtab section. + * + * note on .section use: we specify progbits since usage of the "M" (SHF_MERGE) + * section flag requires it. Use '%progbits' instead of '@progbits' since the + * former apparently works on all arches according to the binutils source. + */ +#define ___EXPORT_SYMBOL(sym, sec, ns) \ + extern typeof(sym) sym; \ + extern const char __kstrtab_##sym[]; \ + extern const char __kstrtabns_##sym[]; \ + __CRC_SYMBOL(sym, sec); \ + asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1 \n" \ + "__kstrtab_" #sym ": \n" \ + " .asciz \"" #sym "\" \n" \ + "__kstrtabns_" #sym ": \n" \ + " .asciz \"" ns "\" \n" \ + " .previous \n"); \ __KSYMTAB_ENTRY(sym, sec) #endif |