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gerrit.openbmc.org / openbmc / openbmc / 4ed12e16f882008388c007c6e86be3ce038d8751 / . / poky / meta / conf / distro / include / security_flags.inc
blob: a9e5b311afa81ace54ee7d86cdac0e4c316e389d [file] [log] [blame]
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]1# Setup extra CFLAGS and LDFLAGS which have 'security' benefits. These
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]2# 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 -0800[diff] [blame]6# in the DISTRO="poky" configuration.
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]7
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]8GCCPIE ?= "--enable-default-pie"
Brad Bishop6ef32652018-10-09 18:59:25 +0100[diff] [blame]9# If static PIE is known to work well, GLIBCPIE="--enable-static-pie" can be set
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]10
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]11# _FORTIFY_SOURCE requires -O1 or higher, so disable in debug builds as they use
12# -O0 which then results in a compiler warning.
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800[diff] [blame]13lcl_maybe_fortify ?= "${@oe.utils.conditional('DEBUG_BUILD','1','','-D_FORTIFY_SOURCE=2',d)}"
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]14
Patrick Williamsc0f7c042017-02-23 20:41:17 -0600[diff] [blame]15# Error on use of format strings that represent possible security problems
16SECURITY_STRINGFORMAT ?= "-Wformat -Wformat-security -Werror=format-security"
17
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]18# Inject pie flags into compiler flags if not configured with gcc itself
19# especially useful with external toolchains
20SECURITY_PIE_CFLAGS ?= "${@'' if '${GCCPIE}' else '-pie -fPIE'}"
21
22SECURITY_NOPIE_CFLAGS ?= "-no-pie -fno-PIE"
23
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800[diff] [blame]24SECURITY_STACK_PROTECTOR ?= "-fstack-protector-strong"
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]25
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800[diff] [blame]26SECURITY_CFLAGS ?= "${SECURITY_STACK_PROTECTOR} ${SECURITY_PIE_CFLAGS} ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
27SECURITY_NO_PIE_CFLAGS ?= "${SECURITY_STACK_PROTECTOR} ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
28
Andrew Geissler4ed12e12020-06-05 18:00:41 -0500[diff] [blame^]29SECURITY_LDFLAGS ?= "-Wl,-z,relro,-z,now"
30SECURITY_X_LDFLAGS ?= "-Wl,-z,relro"
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]31
32# powerpc does not get on with pie for reasons not looked into as yet
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]33GCCPIE_powerpc = ""
Brad Bishop316dfdd2018-06-25 12:45:53 -0400[diff] [blame]34GLIBCPIE_powerpc = ""
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800[diff] [blame]35SECURITY_CFLAGS_remove_powerpc = "${SECURITY_PIE_CFLAGS}"
36SECURITY_CFLAGS_pn-libgcc_powerpc = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]37
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]38SECURITY_CFLAGS_pn-glibc = ""
Brad Bishop79641f22019-09-10 07:20:22 -0400[diff] [blame]39SECURITY_CFLAGS_pn-glibc-testsuite = ""
Patrick Williamsd8c66bc2016-06-20 12:57:21 -0500[diff] [blame]40SECURITY_CFLAGS_pn-gcc-runtime = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]41SECURITY_CFLAGS_pn-grub = ""
42SECURITY_CFLAGS_pn-grub-efi = ""
43SECURITY_CFLAGS_pn-grub-efi-native = ""
44SECURITY_CFLAGS_pn-grub-efi-x86-native = ""
45SECURITY_CFLAGS_pn-grub-efi-i586-native = ""
46SECURITY_CFLAGS_pn-grub-efi-x86-64-native = ""
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]47SECURITY_CFLAGS_pn-mkelfimage_x86 = ""
48
49SECURITY_CFLAGS_pn-valgrind = "${SECURITY_NOPIE_CFLAGS}"
50SECURITY_LDFLAGS_pn-valgrind = ""
51SECURITY_CFLAGS_pn-sysklogd = "${SECURITY_NOPIE_CFLAGS}"
52SECURITY_LDFLAGS_pn-sysklogd = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]53
Patrick Williamsc0f7c042017-02-23 20:41:17 -0600[diff] [blame]54# Recipes which fail to compile when elevating -Wformat-security to an error
55SECURITY_STRINGFORMAT_pn-busybox = ""
Patrick Williamsc0f7c042017-02-23 20:41:17 -0600[diff] [blame]56SECURITY_STRINGFORMAT_pn-gcc = ""
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]57
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]58TARGET_CC_ARCH_append_class-target = " ${SECURITY_CFLAGS}"
Patrick Williamsd8c66bc2016-06-20 12:57:21 -0500[diff] [blame]59TARGET_LDFLAGS_append_class-target = " ${SECURITY_LDFLAGS}"
Andrew Geissler82c905d2020-04-13 13:39:40 -0500[diff] [blame]60TARGET_CC_ARCH_append_class-cross-canadian = " ${SECURITY_CFLAGS}"
61TARGET_LDFLAGS_append_class-cross-canadian = " ${SECURITY_LDFLAGS}"
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]62
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800[diff] [blame]63SECURITY_STACK_PROTECTOR_pn-gcc-runtime = ""
64SECURITY_STACK_PROTECTOR_pn-glibc = ""
Brad Bishop79641f22019-09-10 07:20:22 -0400[diff] [blame]65SECURITY_STACK_PROTECTOR_pn-glibc-testsuite = ""
Brad Bishop316dfdd2018-06-25 12:45:53 -0400[diff] [blame]66# All xorg module drivers need to be linked this way as well and are
67# handled in recipes-graphics/xorg-driver/xorg-driver-common.inc
Patrick Williamsc124f4f2015-09-15 14:41:29 -0500[diff] [blame]68SECURITY_LDFLAGS_pn-xserver-xorg = "${SECURITY_X_LDFLAGS}"
Patrick Williamsd8c66bc2016-06-20 12:57:21 -0500[diff] [blame]69
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500[diff] [blame]70TARGET_CC_ARCH_append_pn-binutils = " ${SELECTED_OPTIMIZATION}"
71TARGET_CC_ARCH_append_pn-gcc = " ${SELECTED_OPTIMIZATION}"
72TARGET_CC_ARCH_append_pn-gdb = " ${SELECTED_OPTIMIZATION}"
73TARGET_CC_ARCH_append_pn-perf = " ${SELECTED_OPTIMIZATION}"