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conf: Enable BTI checking in the arm64 kernel

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To ensure new code has BTI support make it an error to not have the
BTI ELF note when linking the kernel and kernel modules.

Reviewed by:	kib, emaste
Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D45469
This commit is contained in:
Andrew Turner 2024-08-19 13:59:49 +01:00
parent 12a6257a96
commit 43e8849bc2
1 changed files with 3 additions and 0 deletions
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3
sys/conf/kern.mk
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@ -143,6 +143,9 @@ CFLAGS += -mgeneral-regs-only
CFLAGS += -ffixed-x18
# Build with BTI+PAC
CFLAGS += -mbranch-protection=standard
.if ${LINKER_TYPE} == "lld"
LDFLAGS += -Wl,-zbti-report=error
.endif
# TODO: support outline atomics
CFLAGS += -mno-outline-atomics
INLINE_LIMIT?= 8000