diff mbox series

[RFC,13/16] arm64: kernel: Add exception on kuser32 to prevent stack analysis

Message ID 20190516103655.5509-14-raphael.gault@arm.com (mailing list archive)
State RFC
Headers show
Series objtool: Add support for Arm64 | expand

Commit Message

Raphael Gault May 16, 2019, 10:36 a.m. UTC 
kuser32 being used for compatibility, it contains a32 instructions
which are not recognised by objtool when trying to analyse arm64
object files. Thus, we add an exception to skip validation on this
particular file.

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
---
 arch/arm64/kernel/Makefile | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index cd434d0719c1..c564f722ebca 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -29,6 +29,9 @@  $(obj)/%.stub.o: $(obj)/%.o FORCE
 
 obj-$(CONFIG_COMPAT)			+= sys32.o kuser32.o signal32.o 	\
 					   sys_compat.o
+
+OBJECT_FILES_NON_STANDARD_kuser32.o := y
+
 obj-$(CONFIG_FUNCTION_TRACER)		+= ftrace.o entry-ftrace.o
 obj-$(CONFIG_MODULES)			+= module.o
 obj-$(CONFIG_ARM64_MODULE_PLTS)		+= module-plts.o