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/* SPDX-License-Identifier: GPL-2.0-only */ #ifndef __ASM_GENERIC_EXPORT_H #define __ASM_GENERIC_EXPORT_H #ifndef KSYM_FUNC #define KSYM_FUNC(x) x #endif #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS #define KSYM_ALIGN 4 #elif defined(CONFIG_64BIT) #define KSYM_ALIGN 8 #else #define KSYM_ALIGN 4 #endif #ifndef KCRC_ALIGN #define KCRC_ALIGN 4 #endif .macro __put, val, name #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS .long \val - ., \name - ., 0 #elif defined(CONFIG_64BIT) .quad \val, \name, 0 #else .long \val, \name, 0 #endif .endm /* * 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. */ .macro ___EXPORT_SYMBOL name,val,sec #if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS) .section ___ksymtab\sec+\name,"a" .balign KSYM_ALIGN __ksymtab_\name: __put \val, __kstrtab_\name .previous .section __ksymtab_strings,"aMS",%progbits,1 __kstrtab_\name: .asciz "\name" .previous #ifdef CONFIG_MODVERSIONS .section ___kcrctab\sec+\name,"a" .balign KCRC_ALIGN #if defined(CONFIG_MODULE_REL_CRCS) .long __crc_\name - . #else .long __crc_\name #endif .weak __crc_\name .previous #endif #endif .endm #if defined(CONFIG_TRIM_UNUSED_KSYMS) #include <linux/kconfig.h> #include <generated/autoksyms.h> .macro __ksym_marker sym .section ".discard.ksym","a" __ksym_marker_\sym: .previous .endm #define __EXPORT_SYMBOL(sym, val, sec) \ __ksym_marker sym; \ __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) #define __cond_export_sym(sym, val, sec, conf) \ ___cond_export_sym(sym, val, sec, conf) #define ___cond_export_sym(sym, val, sec, enabled) \ __cond_export_sym_##enabled(sym, val, sec) #define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec #define __cond_export_sym_0(sym, val, sec) /* nothing */ #else #define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec #endif #define EXPORT_SYMBOL(name) \ __EXPORT_SYMBOL(name, KSYM_FUNC(name),) #define EXPORT_SYMBOL_GPL(name) \ __EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl) #define EXPORT_DATA_SYMBOL(name) \ __EXPORT_SYMBOL(name, name,) #define EXPORT_DATA_SYMBOL_GPL(name) \ __EXPORT_SYMBOL(name, name,_gpl) #endif