blob: 05253b2df9066ceb13afbf19642f022f590828ef [file] [log] [blame]
Brad Bishopd7bf8c12018-02-25 22:55:05 -05001# Setup extra CFLAGS and LDFLAGS which have 'security' benefits. These
Patrick Williamsc124f4f2015-09-15 14:41:29 -05002# don't work universally, there are recipes which can't use one, the other
3# or both so a blacklist is maintained here. The idea would be over
4# time to reduce this list to nothing.
5# From a Yocto Project perspective, this file is included and tested
Brad Bishop1a4b7ee2018-12-16 17:11:34 -08006# in the DISTRO="poky" configuration.
Patrick Williamsc124f4f2015-09-15 14:41:29 -05007
Brad Bishopd7bf8c12018-02-25 22:55:05 -05008GCCPIE ?= "--enable-default-pie"
Brad Bishop6ef32652018-10-09 18:59:25 +01009# If static PIE is known to work well, GLIBCPIE="--enable-static-pie" can be set
Brad Bishopd7bf8c12018-02-25 22:55:05 -050010
Patrick Williamsc124f4f2015-09-15 14:41:29 -050011# _FORTIFY_SOURCE requires -O1 or higher, so disable in debug builds as they use
12# -O0 which then results in a compiler warning.
Andrew Geisslerd1e89492021-02-12 15:35:20 -060013lcl_maybe_fortify ?= "${@oe.utils.conditional('DEBUG_BUILD','1','','-O -D_FORTIFY_SOURCE=2',d)}"
Patrick Williamsc124f4f2015-09-15 14:41:29 -050014
Patrick Williamsc0f7c042017-02-23 20:41:17 -060015# Error on use of format strings that represent possible security problems
16SECURITY_STRINGFORMAT ?= "-Wformat -Wformat-security -Werror=format-security"
17
Brad Bishopd7bf8c12018-02-25 22:55:05 -050018# Inject pie flags into compiler flags if not configured with gcc itself
19# especially useful with external toolchains
20SECURITY_PIE_CFLAGS ?= "${@'' if '${GCCPIE}' else '-pie -fPIE'}"
21
22SECURITY_NOPIE_CFLAGS ?= "-no-pie -fno-PIE"
23
Brad Bishop1a4b7ee2018-12-16 17:11:34 -080024SECURITY_STACK_PROTECTOR ?= "-fstack-protector-strong"
Patrick Williamsc124f4f2015-09-15 14:41:29 -050025
Brad Bishop1a4b7ee2018-12-16 17:11:34 -080026SECURITY_CFLAGS ?= "${SECURITY_STACK_PROTECTOR} ${SECURITY_PIE_CFLAGS} ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
27SECURITY_NO_PIE_CFLAGS ?= "${SECURITY_STACK_PROTECTOR} ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
28
Andrew Geissler4ed12e12020-06-05 18:00:41 -050029SECURITY_LDFLAGS ?= "-Wl,-z,relro,-z,now"
30SECURITY_X_LDFLAGS ?= "-Wl,-z,relro"
Patrick Williamsc124f4f2015-09-15 14:41:29 -050031
32# powerpc does not get on with pie for reasons not looked into as yet
Brad Bishopd7bf8c12018-02-25 22:55:05 -050033GCCPIE_powerpc = ""
Brad Bishop316dfdd2018-06-25 12:45:53 -040034GLIBCPIE_powerpc = ""
Brad Bishop1a4b7ee2018-12-16 17:11:34 -080035SECURITY_CFLAGS_remove_powerpc = "${SECURITY_PIE_CFLAGS}"
36SECURITY_CFLAGS_pn-libgcc_powerpc = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -050037
Patrick Williamsc124f4f2015-09-15 14:41:29 -050038SECURITY_CFLAGS_pn-glibc = ""
Brad Bishop79641f22019-09-10 07:20:22 -040039SECURITY_CFLAGS_pn-glibc-testsuite = ""
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050040SECURITY_CFLAGS_pn-gcc-runtime = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -050041SECURITY_CFLAGS_pn-grub = ""
42SECURITY_CFLAGS_pn-grub-efi = ""
Brad Bishopd7bf8c12018-02-25 22:55:05 -050043SECURITY_CFLAGS_pn-mkelfimage_x86 = ""
44
45SECURITY_CFLAGS_pn-valgrind = "${SECURITY_NOPIE_CFLAGS}"
46SECURITY_LDFLAGS_pn-valgrind = ""
47SECURITY_CFLAGS_pn-sysklogd = "${SECURITY_NOPIE_CFLAGS}"
48SECURITY_LDFLAGS_pn-sysklogd = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -050049
Patrick Williamsc0f7c042017-02-23 20:41:17 -060050# Recipes which fail to compile when elevating -Wformat-security to an error
51SECURITY_STRINGFORMAT_pn-busybox = ""
Patrick Williamsc0f7c042017-02-23 20:41:17 -060052SECURITY_STRINGFORMAT_pn-gcc = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -050053
Brad Bishopd7bf8c12018-02-25 22:55:05 -050054TARGET_CC_ARCH_append_class-target = " ${SECURITY_CFLAGS}"
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050055TARGET_LDFLAGS_append_class-target = " ${SECURITY_LDFLAGS}"
Andrew Geissler82c905d2020-04-13 13:39:40 -050056TARGET_CC_ARCH_append_class-cross-canadian = " ${SECURITY_CFLAGS}"
57TARGET_LDFLAGS_append_class-cross-canadian = " ${SECURITY_LDFLAGS}"
Patrick Williamsc124f4f2015-09-15 14:41:29 -050058
Brad Bishop1a4b7ee2018-12-16 17:11:34 -080059SECURITY_STACK_PROTECTOR_pn-gcc-runtime = ""
60SECURITY_STACK_PROTECTOR_pn-glibc = ""
Brad Bishop79641f22019-09-10 07:20:22 -040061SECURITY_STACK_PROTECTOR_pn-glibc-testsuite = ""
Brad Bishop316dfdd2018-06-25 12:45:53 -040062# All xorg module drivers need to be linked this way as well and are
63# handled in recipes-graphics/xorg-driver/xorg-driver-common.inc
Patrick Williamsc124f4f2015-09-15 14:41:29 -050064SECURITY_LDFLAGS_pn-xserver-xorg = "${SECURITY_X_LDFLAGS}"
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050065
Brad Bishopd7bf8c12018-02-25 22:55:05 -050066TARGET_CC_ARCH_append_pn-binutils = " ${SELECTED_OPTIMIZATION}"
67TARGET_CC_ARCH_append_pn-gcc = " ${SELECTED_OPTIMIZATION}"
68TARGET_CC_ARCH_append_pn-gdb = " ${SELECTED_OPTIMIZATION}"
69TARGET_CC_ARCH_append_pn-perf = " ${SELECTED_OPTIMIZATION}"