From 36ecafc5ad17861e2bc1fb12af4cc97680e25942 Mon Sep 17 00:00:00 2001 From: Gregory Fong Date: Wed, 12 Jun 2013 17:08:54 +0000 Subject: MIPS: initial stack protector support Implements basic stack protector support based on ARM version in c743f38013aeff58ef6252601e397b5ba281c633 , with Kconfig option, constant canary value set at boot time, and script to check if compiler actually supports stack protector. Tested by creating a kernel module that writes past end of char[]. Signed-off-by: Gregory Fong Cc: linux-mips@linux-mips.org Cc: Filippo Arcidiacono Cc: Carmelo Amoroso Patchwork: https://patchwork.linux-mips.org/patch/5448/ Signed-off-by: Ralf Baechle --- arch/mips/Makefile | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips/Makefile') diff --git a/arch/mips/Makefile b/arch/mips/Makefile index dd58a04ef4b..37f9ef324f2 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -227,6 +227,10 @@ KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0) LDFLAGS += -m $(ld-emul) +ifdef CONFIG_CC_STACKPROTECTOR + KBUILD_CFLAGS += -fstack-protector +endif + ifdef CONFIG_MIPS CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \ -- cgit v1.2.3-70-g09d2