Vincenzo Frascino 1de07eb54a arm64: vdso: Add -fasynchronous-unwind-tables to cflags ... commit 1578e5d031 upstream. On arm64 linux gcc uses -fasynchronous-unwind-tables -funwind-tables by default since gcc-8, so now the de facto platform ABI is to allow unwinding from async signal handlers. However on bare metal targets (aarch64-none-elf), and on old gcc, async and sync unwind tables are not enabled by default to avoid runtime memory costs. This means if linux is built with a baremetal toolchain the vdso.so may not have unwind tables which breaks the gcc platform ABI guarantee in userspace. Add -fasynchronous-unwind-tables explicitly to the vgettimeofday.o cflags to address the ABI change. Fixes: 28b1a824a4 ("arm64: vdso: Substitute gettimeofday() with C implementation") Cc: Will Deacon <will@kernel.org> Reported-by: Szabolcs Nagy <szabolcs.nagy@arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-05-06 08:15:17 +02:00
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.gitignore	arm64: drop non-existing vdso-offsets.h from .gitignore	2017-03-30 19:29:30 +01:00
Makefile	arm64: vdso: Add -fasynchronous-unwind-tables to cflags	2020-05-06 08:15:17 +02:00
gen_vdso_offsets.sh	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
note.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
sigreturn.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
vdso.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
vdso.lds.S	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
vgettimeofday.c	arm64: vdso: Substitute gettimeofday() with C implementation	2019-06-22 21:21:06 +02:00