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_HAVE_ARCH_PREL32_RELOCATIONS 8 #define KSYM_ALIGN 4 9 #elif defined(CONFIG_64BIT) 10 #define KSYM_ALIGN 8 11 #else 12 #define KSYM_ALIGN 4 13 #endif 14 #ifndef KCRC_ALIGN 15 #define KCRC_ALIGN 4 16 #endif 17 18 .macro __put, val, name 19 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS 20 .long \val - ., \name - ., 0 21 #elif defined(CONFIG_64BIT) 22 .quad \val, \name, 0 23 #else 24 .long \val, \name, 0 25 #endif 26 .endm 27 28 /* 29 * note on .section use: @progbits vs %progbits nastiness doesn't matter, 30 * since we immediately emit into those sections anyway. 31 */ 32 .macro ___EXPORT_SYMBOL name,val,sec 33 #ifdef CONFIG_MODULES 34 .globl __ksymtab_\name 35 .section ___ksymtab\sec+\name,"a" 36 .balign KSYM_ALIGN 37 __ksymtab_\name: 38 __put \val, __kstrtab_\name 39 .previous 40 .section __ksymtab_strings,"a" 41 __kstrtab_\name: 42 .asciz "\name" 43 .previous 44 #ifdef CONFIG_MODVERSIONS 45 .section ___kcrctab\sec+\name,"a" 46 .balign KCRC_ALIGN 47 __kcrctab_\name: 48 #if defined(CONFIG_MODULE_REL_CRCS) 49 .long __crc_\name - . 50 #else 51 .long __crc_\name 52 #endif 53 .weak __crc_\name 54 .previous 55 #endif 56 #endif 57 .endm 58 59 #if defined(CONFIG_TRIM_UNUSED_KSYMS) 60 61 #include <linux/kconfig.h> 62 #include <generated/autoksyms.h> 63 64 .macro __ksym_marker sym 65 .section ".discard.ksym","a" 66 __ksym_marker_\sym: 67 .previous 68 .endm 69 70 #define __EXPORT_SYMBOL(sym, val, sec) \ 71 __ksym_marker sym; \ 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