forked from mirrors/linux
753547de0d
The ___kcrctab section holds an array of 32-bit CRC values.
Add a .balign 4 to tell the linker the correct memory alignment.
Fixes: f3304ecd7f ("linux/export: use inline assembler to populate symbol CRCs")
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Please do not include this explicitly.
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* This is used by C files generated by modpost.
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*/
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#ifndef __LINUX_EXPORT_INTERNAL_H__
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#define __LINUX_EXPORT_INTERNAL_H__
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#include <linux/compiler.h>
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#include <linux/types.h>
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#if defined(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS)
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/*
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* relative reference: this reduces the size by half on 64-bit architectures,
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* and eliminates the need for absolute relocations that require runtime
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* processing on relocatable kernels.
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*/
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#define __KSYM_ALIGN ".balign 4"
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#define __KSYM_REF(sym) ".long " #sym "- ."
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#elif defined(CONFIG_64BIT)
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#define __KSYM_ALIGN ".balign 8"
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#define __KSYM_REF(sym) ".quad " #sym
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#else
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#define __KSYM_ALIGN ".balign 4"
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#define __KSYM_REF(sym) ".long " #sym
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#endif
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/*
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* For every exported symbol, do the following:
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*
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* - Put the name of the symbol and namespace (empty string "" for none) in
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* __ksymtab_strings.
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* - Place a struct kernel_symbol entry in the __ksymtab section.
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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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#define __KSYMTAB(name, sym, sec, ns) \
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asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \
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"__kstrtab_" #name ":" "\n" \
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" .asciz \"" #name "\"" "\n" \
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"__kstrtabns_" #name ":" "\n" \
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" .asciz \"" ns "\"" "\n" \
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" .previous" "\n" \
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" .section \"___ksymtab" sec "+" #name "\", \"a\"" "\n" \
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__KSYM_ALIGN "\n" \
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"__ksymtab_" #name ":" "\n" \
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__KSYM_REF(sym) "\n" \
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__KSYM_REF(__kstrtab_ ##name) "\n" \
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__KSYM_REF(__kstrtabns_ ##name) "\n" \
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" .previous" "\n" \
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)
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#if defined(CONFIG_PARISC) && defined(CONFIG_64BIT)
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#define KSYM_FUNC(name) P%name
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#else
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#define KSYM_FUNC(name) name
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#endif
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#define KSYMTAB_FUNC(name, sec, ns) __KSYMTAB(name, KSYM_FUNC(name), sec, ns)
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#define KSYMTAB_DATA(name, sec, ns) __KSYMTAB(name, name, sec, ns)
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#define SYMBOL_CRC(sym, crc, sec) \
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asm(".section \"___kcrctab" sec "+" #sym "\",\"a\"" "\n" \
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".balign 4" "\n" \
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"__crc_" #sym ":" "\n" \
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".long " #crc "\n" \
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".previous" "\n")
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#endif /* __LINUX_EXPORT_INTERNAL_H__ */
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