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| author |   Ard Biesheuvel <ardb@kernel.org> | 2021-10-21 16:16:47 +0200 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2021-12-03 15:11:30 +0100 |
| commit | f05eb1d24eb564488014d90b31824f71984d7ef5 (patch) | |
| tree | 5912b4674c2d6e5dd7b82745702e8a39bad14290 /arch/arm/Makefile | |
| parent | ARM: decompressor: disable stack protector (diff) | |
| download | linux-dev-f05eb1d24eb564488014d90b31824f71984d7ef5.tar.xz linux-dev-f05eb1d24eb564488014d90b31824f71984d7ef5.zip | |
ARM: stackprotector: prefer compiler for TLS based per-task protector
Currently, we implement the per-task stack protector for ARM using a GCC
plugin, due to lack of native compiler support. However, work is
underway to get this implemented in the compiler, which means we will be
able to deprecate the GCC plugin at some point.
In the meantime, we will need to support both, where the native compiler
implementation is obviously preferred. So let's wire this up in Kconfig
and the Makefile.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
Diffstat (limited to 'arch/arm/Makefile')
| -rw-r--r-- | arch/arm/Makefile | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 77172d555c7e..e943624cbf87 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -275,6 +275,14 @@ endif ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) prepare: stack_protector_prepare +ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y) +stack_protector_prepare: prepare0 + $(eval KBUILD_CFLAGS += \ + -mstack-protector-guard=tls \ + -mstack-protector-guard-offset=$(shell \ + awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\ + include/generated/asm-offsets.h)) +else stack_protector_prepare: prepare0 $(eval SSP_PLUGIN_CFLAGS := \ -fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \ @@ -283,6 +291,7 @@ stack_protector_prepare: prepare0 $(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS)) $(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS)) endif +endif all: $(notdir $(KBUILD_IMAGE)) |