Fix GENERIC-KASAN kernel build for amd64

Work around https://github.com/llvm/llvm-project/issues/87923, which
leads to an assertion failure compiling several kernel source files with
asan enabled.

PR:		276104
MFC after:	1 month

This commit is contained in:

Dimitry Andric

2024-04-07 19:56:03 +02:00

parent 1526667bc6

commit b811dac211

1 changed files with 5 additions and 0 deletions

									
										sys/conf/kern.pre.mk
									
		+5
		
												View File
												
				@@ -111,6 +111,11 @@ SAN_CFLAGS+=	-DSAN_NEEDS_INTERCEPTORS -DSAN_INTERCEPTOR_PREFIX=kasan \

				#	upstreamed similar to: https://reviews.llvm.org/D98285

				#

				SAN_CFLAGS+=	-mllvm -asan-mapping-offset=0xdfff208000000000

				.elif ${MACHINE_CPUARCH} == "amd64" && \

				      ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 180000

				# Work around https://github.com/llvm/llvm-project/issues/87923, which leads to

				# an assertion failure compiling dtrace.c with asan enabled.

				SAN_CFLAGS+=	-mllvm -asan-use-stack-safety=0

				.endif

				.endif