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authorKees Cook <keescook@chromium.org>2016-01-26 01:18:13 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2016-01-26 23:49:26 +0000
commit7f66cd3f5420e7d11abd234033e7cb7a9738fc38 (patch)
treee492f451afedc5a886987f678167575d29917742 /arch/arm/boot/compressed
parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
downloadlinux-7f66cd3f5420e7d11abd234033e7cb7a9738fc38.tar.bz2
ARM: 8500/1: fix atags_to_fdt with stack-protector-strong
Building with CONFIG_CC_STACKPROTECTOR_STRONG triggers protection code generation under CONFIG_ARM_ATAG_DTB_COMPAT but this is too early for being able to use any of the stack_chk code. Explicitly disable it for only the atags_to_fdt bits. Suggested-by: zhxihu <zhxihu@marvell.com> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/boot/compressed')
-rw-r--r--arch/arm/boot/compressed/Makefile9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 4c23a68a0917..7a6a58ef8aaf 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -106,6 +106,15 @@ ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
+# -fstack-protector-strong triggers protection checks in this code,
+# but it is being used too early to link to meaningful stack_chk logic.
+nossp_flags := $(call cc-option, -fno-stack-protector)
+CFLAGS_atags_to_fdt.o := $(nossp_flags)
+CFLAGS_fdt.o := $(nossp_flags)
+CFLAGS_fdt_ro.o := $(nossp_flags)
+CFLAGS_fdt_rw.o := $(nossp_flags)
+CFLAGS_fdt_wip.o := $(nossp_flags)
+
ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
asflags-y := -DZIMAGE