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ICP: Silence objtool "stack pointer realignment" warnings 

Objtool requires the use of a DRAP register while aligning the
stack. Since a DRAP register is a gcc concept and we are
notoriously low on registers in the crypto code, it's not worth
the effort to mimic gcc generated stack realignment.

We simply silence the warning by adding the offending object files
to OBJECT_FILES_NON_STANDARD.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #6950
Closes #11914
This commit is contained in:
Attila Fülöp 2021-04-17 22:11:18 +02:00 committed by Brian Behlendorf
parent 121a34e36b
commit cdc27fd061
1 changed files with 6 additions and 0 deletions
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6
module/icp/Makefile.in
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@ -69,6 +69,12 @@ $(MODULE)-$(CONFIG_X86) += algs/aes/aes_impl_x86-64.o
# utility tries to interpret them as opcodes and obviously fails doing so.
OBJECT_FILES_NON_STANDARD_aesni-gcm-x86_64.o := y
OBJECT_FILES_NON_STANDARD_ghash-x86_64.o := y
# Suppress objtool "unsupported stack pointer realignment" warnings. We are
# not using a DRAP register while aligning the stack to a 64 byte boundary.
# See #6950 for the reasoning.
OBJECT_FILES_NON_STANDARD_sha1-x86_64.o := y
OBJECT_FILES_NON_STANDARD_sha256_impl.o := y
OBJECT_FILES_NON_STANDARD_sha512_impl.o := y
ICP_DIRS = \
api \