conf: Enable BTI checking in the arm64 kernel

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

									
										sys/conf/kern.mk
									
		+3
		
												View File
												
				@@ -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