1 #ifndef __ASM_GENERIC_EXPORT_H 2 #define __ASM_GENERIC_EXPORT_H 3 4 #ifndef KSYM_FUNC 5 #define KSYM_FUNC(x) x 6 #endif 7 #ifdef CONFIG_64BIT 8 #ifndef KSYM_ALIGN 9 #define KSYM_ALIGN 8 10 #endif 11 #else 12 #ifndef KSYM_ALIGN 13 #define KSYM_ALIGN 4 14 #endif 15 #endif 16 #ifndef KCRC_ALIGN 17 #define KCRC_ALIGN 4 18 #endif 19 20 .macro __put, val, name 21 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS 22 .long \val - ., \name - . 23 #elif defined(CONFIG_64BIT) 24 .quad \val, \name 25 #else 26 .long \val, \name 27 #endif 28 .endm 29 30 /* 31 * note on .section use: @progbits vs %progbits nastiness doesn't matter, 32 * since we immediately emit into those sections anyway. 33 */ 34 .macro ___EXPORT_SYMBOL name,val,sec 35 #ifdef CONFIG_MODULES 36 .globl __ksymtab_\name 37 .section ___ksymtab\sec+\name,"a" 38 .balign KSYM_ALIGN 39 __ksymtab_\name: 40 __put \val, __kstrtab_\name 41 .previous 42 .section __ksymtab_strings,"a" 43 __kstrtab_\name: 44 .asciz "\name" 45 .previous 46 #ifdef CONFIG_MODVERSIONS 47 .section ___kcrctab\sec+\name,"a" 48 .balign KCRC_ALIGN 49 __kcrctab_\name: 50 #if defined(CONFIG_MODULE_REL_CRCS) 51 .long __crc_\name - . 52 #else 53 .long __crc_\name 54 #endif 55 .weak __crc_\name 56 .previous 57 #endif 58 #endif 59 .endm 60 #undef __put 61 62 #if defined(__KSYM_DEPS__) 63 64 #define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym === 65 66 #elif defined(CONFIG_TRIM_UNUSED_KSYMS) 67 68 #include <linux/kconfig.h> 69 #include <generated/autoksyms.h> 70 71 #define __EXPORT_SYMBOL(sym, val, sec) \ 72 __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) 73 #define __cond_export_sym(sym, val, sec, conf) \ 74 ___cond_export_sym(sym, val, sec, conf) 75 #define ___cond_export_sym(sym, val, sec, enabled) \ 76 __cond_export_sym_##enabled(sym, val, sec) 77 #define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec 78 #define __cond_export_sym_0(sym, val, sec) /* nothing */ 79 80 #else 81 #define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec 82 #endif 83 84 #define EXPORT_SYMBOL(name) \ 85 __EXPORT_SYMBOL(name, KSYM_FUNC(name),) 86 #define EXPORT_SYMBOL_GPL(name) \ 87 __EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl) 88 #define EXPORT_DATA_SYMBOL(name) \ 89 __EXPORT_SYMBOL(name, name,) 90 #define EXPORT_DATA_SYMBOL_GPL(name) \ 91 __EXPORT_SYMBOL(name, name,_gpl) 92 93 #endif 94