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authorNathan Rossi <nathan@nathanrossi.com>2018-09-10 12:44:13 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-09-11 09:05:29 +0100
commitdfe434b793c156a87b5ead5cb85fe60d920d69d3 (patch)
treed9b1adb8a8068c1bb19491c62d33d2aaddcb89ac
parent69ce8ba6cc610f310ae28d988d487918906e6ef9 (diff)
downloadopenembedded-core-contrib-dfe434b793c156a87b5ead5cb85fe60d920d69d3.tar.gz
tclibc: For newlib and baremetal disable some security features
With GCCPIE being enabled by default with security_flags.inc the compiler will by default attempt to compile and link programs as PIE. The targets that use newlib and baremetal in general do not support PIE or are otherwise unable to use it due to how embedded targets are compiled and executed. As such it makes sense to disable PIE by default for these libc's in order to prevent build failures. For baremetal tclibc there are no libc features or implementation as such there is no implementation for the strong stack protector by default. Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
-rw-r--r--meta/conf/distro/include/tclibc-baremetal.inc6
-rw-r--r--meta/conf/distro/include/tclibc-newlib.inc4
2 files changed, 10 insertions, 0 deletions
diff --git a/meta/conf/distro/include/tclibc-baremetal.inc b/meta/conf/distro/include/tclibc-baremetal.inc
index 1bf44c8591..b00917913f 100644
--- a/meta/conf/distro/include/tclibc-baremetal.inc
+++ b/meta/conf/distro/include/tclibc-baremetal.inc
@@ -28,3 +28,9 @@ TOOLCHAIN_HOST_TASK ?= "packagegroup-cross-canadian-${MACHINE}"
TOOLCHAIN_HOST_TASK_ATTEMPTONLY ?= ""
TOOLCHAIN_TARGET_TASK ?= "libgcc-dev"
TOOLCHAIN_NEED_CONFIGSITE_CACHE_remove = "virtual/${MLPREFIX}libc zlib ncurses"
+
+# disable stack protector by default (no-libc, no protector implementation)
+SECURITY_STACK_PROTECTOR_libc-baremetal = ""
+# disable pie security flags by default
+SECURITY_CFLAGS_libc-baremetal = "${SECURITY_NOPIE_CFLAGS}"
+SECURITY_LDFLAGS_libc-baremetal = ""
diff --git a/meta/conf/distro/include/tclibc-newlib.inc b/meta/conf/distro/include/tclibc-newlib.inc
index dc631d8ada..896c0b16d7 100644
--- a/meta/conf/distro/include/tclibc-newlib.inc
+++ b/meta/conf/distro/include/tclibc-newlib.inc
@@ -42,3 +42,7 @@ TARGET_OS_arm = "eabi"
TOOLCHAIN_HOST_TASK ?= "packagegroup-cross-canadian-${MACHINE}"
TOOLCHAIN_TARGET_TASK ?= "${LIBC_DEPENDENCIES}"
TOOLCHAIN_NEED_CONFIGSITE_CACHE_remove = "zlib ncurses"
+
+# disable pie security flags by default
+SECURITY_CFLAGS_libc-newlib = "${SECURITY_NOPIE_CFLAGS}"
+SECURITY_LDFLAGS_libc-newlib = ""