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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697/* SPDX-License-Identifier: GPL-2.0-only */#ifndef _LINUX_EXPORT_H#define _LINUX_EXPORT_H
#include <linux/compiler.h>#include <linux/linkage.h>#include <linux/stringify.h>
/* * This comment block is used by fixdep. Please do not remove. * * When CONFIG_MODVERSIONS is changed from n to y, all source files having * EXPORT_SYMBOL variants must be re-compiled because genksyms is run as a * side effect of the *.o build rule. */
#ifdef CONFIG_64BIT#define __EXPORT_SYMBOL_REF(sym) \ .balign 8 ASM_NL \ .quad sym#else#define __EXPORT_SYMBOL_REF(sym) \ .balign 4 ASM_NL \ .long sym#endif
/* * LLVM integrated assembler cam merge adjacent string literals (like * C and GNU-as) passed to '.ascii', but not to '.asciz' and chokes on: * * .asciz "MODULE_" "kvm" ; */#define ___EXPORT_SYMBOL(sym, license, ns...) \ .section ".export_symbol","a" ASM_NL \ __export_symbol_##sym: ASM_NL \ .asciz license ASM_NL \ .ascii ns "\0" ASM_NL \ __EXPORT_SYMBOL_REF(sym) ASM_NL \ .previous
#if defined(__DISABLE_EXPORTS)
/* * Allow symbol exports to be disabled completely so that C code may * be reused in other execution contexts such as the UEFI stub or the * decompressor. */#define __EXPORT_SYMBOL(sym, license, ns)
#elif defined(__GENKSYMS__)
#define __EXPORT_SYMBOL(sym, license, ns) __GENKSYMS_EXPORT_SYMBOL(sym)
#elif defined(__ASSEMBLY__)
#define __EXPORT_SYMBOL(sym, license, ns) \ ___EXPORT_SYMBOL(sym, license, ns)
#else
#ifdef CONFIG_GENDWARFKSYMS/* * With CONFIG_GENDWARFKSYMS, ensure the compiler emits debugging * information for all exported symbols, including those defined in * different TUs, by adding a __gendwarfksyms_ptr_<symbol> pointer * that's discarded during the final link. */#define __GENDWARFKSYMS_EXPORT(sym) \ static typeof(sym) *__gendwarfksyms_ptr_##sym __used \ __section(".discard.gendwarfksyms") = &sym;#else#define __GENDWARFKSYMS_EXPORT(sym)#endif
#define __EXPORT_SYMBOL(sym, license, ns) \ extern typeof(sym) sym; \ __ADDRESSABLE(sym) \ __GENDWARFKSYMS_EXPORT(sym) \ asm(__stringify(___EXPORT_SYMBOL(sym, license, ns)))
#endif
#ifdef DEFAULT_SYMBOL_NAMESPACE#define _EXPORT_SYMBOL(sym, license) __EXPORT_SYMBOL(sym, license, DEFAULT_SYMBOL_NAMESPACE)#else#define _EXPORT_SYMBOL(sym, license) __EXPORT_SYMBOL(sym, license, "")#endif
#define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "")#define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "GPL")#define EXPORT_SYMBOL_NS(sym, ns) __EXPORT_SYMBOL(sym, "", ns)#define EXPORT_SYMBOL_NS_GPL(sym, ns) __EXPORT_SYMBOL(sym, "GPL", ns)
#define EXPORT_SYMBOL_FOR_MODULES(sym, mods) __EXPORT_SYMBOL(sym, "GPL", "module:" mods)
#endif /* _LINUX_EXPORT_H */