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linux/export: Fix alignment for 64-bit ksymtab entries

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[ Upstream commit f6847807c2 ]

An alignment of 4 bytes is wrong for 64-bit platforms which don't define
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS (which then store 64-bit pointers).
Fix their alignment to 8 bytes.

Fixes: ddb5cdbafa ("kbuild: generate KSYMTAB entries by modpost")
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Helge Deller 2023-11-22 23:18:11 +01:00 committed by Greg Kroah-Hartman
parent 7844d7d8d8
commit 466e9af155
1 changed files with 4 additions and 1 deletions
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5
include/linux/export-internal.h
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@ -16,10 +16,13 @@
* and eliminates the need for absolute relocations that require runtime
* processing on relocatable kernels.
*/
#define __KSYM_ALIGN ".balign 4"
#define __KSYM_REF(sym) ".long " #sym "- ."
#elif defined(CONFIG_64BIT)
#define __KSYM_ALIGN ".balign 8"
#define __KSYM_REF(sym) ".quad " #sym
#else
#define __KSYM_ALIGN ".balign 4"
#define __KSYM_REF(sym) ".long " #sym
#endif
@ -42,7 +45,7 @@
" .asciz \"" ns "\"" "\n" \
" .previous" "\n" \
" .section \"___ksymtab" sec "+" #name "\", \"a\"" "\n" \
" .balign 4" "\n" \
__KSYM_ALIGN "\n" \
"__ksymtab_" #name ":" "\n" \
__KSYM_REF(sym) "\n" \
__KSYM_REF(__kstrtab_ ##name) "\n" \