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[RFC,v5,51/57] arm64: crypto: Add exceptions for crypto object to prevent stack analysis

Message ID 20200109160300.26150-52-jthierry@redhat.com (mailing list archive)
State New, archived
Headers show
Series objtool: Add support for arm64 | expand

Commit Message

Julien Thierry Jan. 9, 2020, 4:02 p.m. UTC
From: Raphael Gault <raphael.gault@arm.com>

Some crypto modules contain `.word` of data in the .text section.
Since objtool can't make the distinction between data and incorrect
instruction, it gives a warning about the instruction being unknown
and stops the analysis of the object file.

The exception can be removed if the data are moved to another section
or if objtool is tweaked to handle this particular case.

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
Signed-off-by: Julien Thierry <jthierry@redhat.com>
 arch/arm64/crypto/Makefile | 3 +++
 1 file changed, 3 insertions(+)
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diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile
index d0901e610df3..576a19923185 100644
--- a/arch/arm64/crypto/Makefile
+++ b/arch/arm64/crypto/Makefile
@@ -43,9 +43,11 @@  aes-neon-blk-y := aes-glue-neon.o aes-neon.o
 obj-$(CONFIG_CRYPTO_SHA256_ARM64) += sha256-arm64.o
 sha256-arm64-y := sha256-glue.o sha256-core.o
+OBJECT_FILES_NON_STANDARD_sha256-core.o := y
 obj-$(CONFIG_CRYPTO_SHA512_ARM64) += sha512-arm64.o
 sha512-arm64-y := sha512-glue.o sha512-core.o
+OBJECT_FILES_NON_STANDARD_sha512-core.o := y
 obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha-neon.o
 chacha-neon-y := chacha-neon-core.o chacha-neon-glue.o
@@ -62,6 +64,7 @@  aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o
 obj-$(CONFIG_CRYPTO_AES_ARM64_BS) += aes-neon-bs.o
 aes-neon-bs-y := aes-neonbs-core.o aes-neonbs-glue.o
+OBJECT_FILES_NON_STANDARD_aes-neonbs-core.o := y