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machine/arch-arm64: add -mbranch-protection=standard

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Enable branch protection (PAC/BTI) for all aarch64 builds.  This was
previously enabled at a global level in the GCC build, but that breaks
the gcc test suite.

(From OE-Core rev: a1119750e9b3b9fae4fa9698d2ea3710a5a73768)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 8905639d1cdc5ce809cc5ecd9672f5e86bf8a579)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Ross Burton
2023-07-13 12:01:19 +01:00
committed by Steve Sakoman
parent 8585e78965
commit a2bf83842a
1 changed files with 5 additions and 0 deletions
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5
meta/conf/machine/include/arm/arch-arm64.inc
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@@ -37,3 +37,8 @@ TUNE_ARCH = "${@bb.utils.contains('TUNE_FEATURES', 'aarch64', '${TUNE_ARCH_64}',
TUNE_PKGARCH = "${@bb.utils.contains('TUNE_FEATURES', 'aarch64', '${TUNE_PKGARCH_64}', '${TUNE_PKGARCH_32}', d)}"
ABIEXTENSION = "${@bb.utils.contains('TUNE_FEATURES', 'aarch64', '${ABIEXTENSION_64}', '${ABIEXTENSION_32}', d)}"
TARGET_FPU = "${@bb.utils.contains('TUNE_FEATURES', 'aarch64', '${TARGET_FPU_64}', '${TARGET_FPU_32}', d)}"
# Emit branch protection (PAC/BTI) instructions. On hardware that doesn't
# support these they're meaningless NOP instructions, so there's very little
# reason not to.
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'aarch64', ' -mbranch-protection=standard', '', d)}"