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94 lines
2.3 KiB
94 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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#ifndef __ASM_GENERIC_EXPORT_H |
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#define __ASM_GENERIC_EXPORT_H |
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#ifndef KSYM_FUNC |
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#define KSYM_FUNC(x) x |
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#endif |
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#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS |
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#define KSYM_ALIGN 4 |
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#elif defined(CONFIG_64BIT) |
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#define KSYM_ALIGN 8 |
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#else |
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#define KSYM_ALIGN 4 |
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#endif |
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#ifndef KCRC_ALIGN |
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#define KCRC_ALIGN 4 |
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#endif |
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.macro __put, val, name |
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#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS |
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.long \val - ., \name - ., 0 |
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#elif defined(CONFIG_64BIT) |
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.quad \val, \name, 0 |
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#else |
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.long \val, \name, 0 |
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#endif |
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.endm |
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/* |
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* note on .section use: we specify progbits since usage of the "M" (SHF_MERGE) |
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* section flag requires it. Use '%progbits' instead of '@progbits' since the |
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* former apparently works on all arches according to the binutils source. |
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*/ |
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.macro ___EXPORT_SYMBOL name,val,sec |
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#if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS) |
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.section ___ksymtab\sec+\name,"a" |
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.balign KSYM_ALIGN |
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__ksymtab_\name: |
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__put \val, __kstrtab_\name |
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.previous |
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.section __ksymtab_strings,"aMS",%progbits,1 |
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__kstrtab_\name: |
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.asciz "\name" |
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.previous |
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#ifdef CONFIG_MODVERSIONS |
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.section ___kcrctab\sec+\name,"a" |
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.balign KCRC_ALIGN |
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#if defined(CONFIG_MODULE_REL_CRCS) |
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.long __crc_\name - . |
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#else |
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.long __crc_\name |
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#endif |
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.weak __crc_\name |
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.previous |
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#endif |
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#endif |
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.endm |
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#if defined(CONFIG_TRIM_UNUSED_KSYMS) |
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#include <linux/kconfig.h> |
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#include <generated/autoksyms.h> |
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.macro __ksym_marker sym |
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.section ".discard.ksym","a" |
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__ksym_marker_\sym: |
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.previous |
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.endm |
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#define __EXPORT_SYMBOL(sym, val, sec) \ |
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__ksym_marker sym; \ |
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__cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) |
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#define __cond_export_sym(sym, val, sec, conf) \ |
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___cond_export_sym(sym, val, sec, conf) |
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#define ___cond_export_sym(sym, val, sec, enabled) \ |
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__cond_export_sym_##enabled(sym, val, sec) |
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#define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec |
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#define __cond_export_sym_0(sym, val, sec) /* nothing */ |
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#else |
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#define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec |
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#endif |
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#define EXPORT_SYMBOL(name) \ |
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__EXPORT_SYMBOL(name, KSYM_FUNC(name),) |
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#define EXPORT_SYMBOL_GPL(name) \ |
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__EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl) |
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#define EXPORT_DATA_SYMBOL(name) \ |
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__EXPORT_SYMBOL(name, name,) |
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#define EXPORT_DATA_SYMBOL_GPL(name) \ |
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__EXPORT_SYMBOL(name, name,_gpl) |
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#endif
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