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Jens Remus 3497c0bec9 s390/vdso: Add CFI for RA register to asm macro vdso_func 
[ Upstream commit b961ec10b9f9719987470236feb50c967db5a652 ]

The return-address (RA) register r14 is specified as volatile in the
s390x ELF ABI [1]. Nevertheless proper CFI directives must be provided
for an unwinder to restore the return address, if the RA register
value is changed from its value at function entry, as it is the case.

[1]: s390x ELF ABI, https://github.com/IBM/s390x-abi/releases

Fixes: 4bff8cb54502 ("s390: convert to GENERIC_VDSO")
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-19 11:32:42 +01:00
..
getcpu.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
note.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso64.lds.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso64_generic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso64_wrapper.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso_user_wrapper.S s390/vdso: Add CFI for RA register to asm macro vdso_func 2024-11-19 11:32:42 +01:00