74 lines
3.2 KiB
HTML
74 lines
3.2 KiB
HTML
# Setup extra CFLAGS and LDFLAGS which have 'security' benefits. These
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# don't work universally, there are recipes which can't use one, the other
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# or both so a blacklist is maintained here. The idea would be over
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# time to reduce this list to nothing.
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# From a Yocto Project perspective, this file is included and tested
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# in the DISTRO="poky-lsb" configuration.
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GCCPIE ?= "--enable-default-pie"
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# _FORTIFY_SOURCE requires -O1 or higher, so disable in debug builds as they use
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# -O0 which then results in a compiler warning.
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lcl_maybe_fortify = "${@base_conditional('DEBUG_BUILD','1','','-D_FORTIFY_SOURCE=2',d)}"
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# Error on use of format strings that represent possible security problems
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SECURITY_STRINGFORMAT ?= "-Wformat -Wformat-security -Werror=format-security"
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# Inject pie flags into compiler flags if not configured with gcc itself
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# especially useful with external toolchains
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SECURITY_PIE_CFLAGS ?= "${@'' if '${GCCPIE}' else '-pie -fPIE'}"
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SECURITY_NOPIE_CFLAGS ?= "-no-pie -fno-PIE"
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SECURITY_CFLAGS ?= "-fstack-protector-strong ${SECURITY_PIE_CFLAGS} ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
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SECURITY_NO_PIE_CFLAGS ?= "-fstack-protector-strong ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
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SECURITY_LDFLAGS ?= "-fstack-protector-strong -Wl,-z,relro,-z,now"
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SECURITY_X_LDFLAGS ?= "-fstack-protector-strong -Wl,-z,relro"
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# powerpc does not get on with pie for reasons not looked into as yet
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SECURITY_CFLAGS_powerpc = "-fstack-protector-strong ${lcl_maybe_fortify} ${SECURITY_NOPIE_CFLAGS}"
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SECURITY_CFLAGS_pn-libgcc_powerpc = ""
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GCCPIE_powerpc = ""
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# arm specific security flag issues
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SECURITY_CFLAGS_pn-glibc = ""
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SECURITY_CFLAGS_pn-glibc-initial = ""
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SECURITY_CFLAGS_pn-gcc-runtime = ""
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SECURITY_CFLAGS_pn-grub = ""
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SECURITY_CFLAGS_pn-grub-efi = ""
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SECURITY_CFLAGS_pn-grub-efi-native = ""
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SECURITY_CFLAGS_pn-grub-efi-x86-native = ""
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SECURITY_CFLAGS_pn-grub-efi-i586-native = ""
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SECURITY_CFLAGS_pn-grub-efi-x86-64-native = ""
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SECURITY_CFLAGS_pn-mkelfimage_x86 = ""
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SECURITY_CFLAGS_pn-valgrind = "${SECURITY_NOPIE_CFLAGS}"
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SECURITY_LDFLAGS_pn-valgrind = ""
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SECURITY_CFLAGS_pn-sysklogd = "${SECURITY_NOPIE_CFLAGS}"
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SECURITY_LDFLAGS_pn-sysklogd = ""
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# Recipes which fail to compile when elevating -Wformat-security to an error
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SECURITY_STRINGFORMAT_pn-busybox = ""
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SECURITY_STRINGFORMAT_pn-gcc = ""
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TARGET_CC_ARCH_append_class-target = " ${SECURITY_CFLAGS}"
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TARGET_LDFLAGS_append_class-target = " ${SECURITY_LDFLAGS}"
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SECURITY_LDFLAGS_remove_pn-gcc-runtime = "-fstack-protector-strong"
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SECURITY_LDFLAGS_remove_pn-glibc = "-fstack-protector-strong"
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SECURITY_LDFLAGS_remove_pn-glibc-initial = "-fstack-protector-strong"
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SECURITY_LDFLAGS_pn-xf86-video-fbdev = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xf86-video-intel = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xf86-video-omapfb = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xf86-video-omap = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xf86-video-vesa = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xf86-video-vmware = "${SECURITY_X_LDFLAGS}"
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SECURITY_LDFLAGS_pn-xserver-xorg = "${SECURITY_X_LDFLAGS}"
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TARGET_CC_ARCH_append_pn-binutils = " ${SELECTED_OPTIMIZATION}"
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TARGET_CC_ARCH_append_pn-gcc = " ${SELECTED_OPTIMIZATION}"
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TARGET_CC_ARCH_append_pn-gdb = " ${SELECTED_OPTIMIZATION}"
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TARGET_CC_ARCH_append_pn-perf = " ${SELECTED_OPTIMIZATION}"
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