mirror of git://git.yoctoproject.org/linux-yocto.git synced 2026-01-27 12:47:24 +01:00

Kees Cook 11bb1678e2 integer-wrap: Force full rebuild when .scl file changes

Since the integer wrapping sanitizer's behavior depends on its associated
.scl file, we must force a full rebuild if the file changes. If not,
instrumentation may differ between targets based on when they were built.

Generate a new header file, integer-wrap.h, any time the Clang .scl
file changes. Include the header file in compiler-version.h when its
associated feature name, INTEGER_WRAP, is defined. This will be picked
up by fixdep and force rebuilds where needed.

Acked-by: Justin Stitt <justinstitt@google.com>
Link: https://lore.kernel.org/r/20250503184623.2572355-3-kees@kernel.org
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Kees Cook <kees@kernel.org>

2025-05-08 09:42:06 -07:00

902 B

Raw Blame History

SPDX-License-Identifier: GPL-2.0-only

fixdep: used to generate dependency information during build process

hostprogs-always-y += fixdep

randstruct: the seed is needed before building the gcc-plugin or

before running a Clang kernel build.

gen-randstruct-seed := $(srctree)/scripts/gen-randstruct-seed.sh quiet_cmd_create_randstruct_seed = GENSEED $@ cmd_create_randstruct_seed =
$(CONFIG_SHELL) $(gen-randstruct-seed)
$@ $(objtree)/include/generated/randstruct_hash.h $(obj)/randstruct.seed: $(gen-randstruct-seed) FORCE $(call if_changed,create_randstruct_seed) always-$(CONFIG_RANDSTRUCT) += randstruct.seed

integer-wrap: if the .scl file changes, we need to do a full rebuild.

$(obj)/../../include/generated/integer-wrap.h: $(srctree)/scripts/integer-wrap-ignore.scl FORCE $(call if_changed,touch) always-$(CONFIG_UBSAN_INTEGER_WRAP) += ../../include/generated/integer-wrap.h

902 B Raw Blame History