some OE distros can default to hardened toolchains which means PIE is added implicitly to compiler cmdline, here this options makes sure that whattever the default toolchain are, u-boot is not impacted
Fixes errors e.g. | arm-yoe-linux-gnueabi-ld.bfd: u-boot-spl section `.rodata' will not fit in region `.sram' | arm-yoe-linux-gnueabi-ld.bfd: region `.sram' overflowed by 5772 bytes Signed-off-by: Khem Raj <[email protected]> Cc: Tom Rini <[email protected]> Cc: Denys Dmytriyenko <[email protected]> --- .../0001-Always-build-with-fno-PIE.patch | 35 +++++++++++++++++++ .../u-boot/u-boot-ti-staging_2018.01.bb | 2 ++ 2 files changed, 37 insertions(+) create mode 100644 recipes-bsp/u-boot/files/0001-Always-build-with-fno-PIE.patch diff --git a/recipes-bsp/u-boot/files/0001-Always-build-with-fno-PIE.patch b/recipes-bsp/u-boot/files/0001-Always-build-with-fno-PIE.patch new file mode 100644 index 00000000..dfd99c66 --- /dev/null +++ b/recipes-bsp/u-boot/files/0001-Always-build-with-fno-PIE.patch @@ -0,0 +1,35 @@ +From ec81bbe3ea7e077512f4b9d2b4aa87e7f1494bcc Mon Sep 17 00:00:00 2001 +From: Khem Raj <[email protected]> +Date: Wed, 17 Oct 2018 22:32:57 -0700 +Subject: [PATCH] Always build with -fno-PIE + +GNU Toolchains can be configured to generate PIE by default +while PIE could be ok, it is known that u-boot/SPL on ARM starts to +generate bigger code and starts to overflow the SRAM size, therefore +disabling PIE explcitly insulates against toolchain intrinsic defaults + +Fixes errors like +| arm-yoe-linux-gnueabi-ld.bfd: u-boot-spl section `.rodata' will not fit in region `.sram' +| arm-yoe-linux-gnueabi-ld.bfd: region `.sram' overflowed by 5772 bytes + +Signed-off-by: Khem Raj <[email protected]> +Cc: Tom Rini <[email protected]> +--- + Makefile | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/Makefile b/Makefile +index 45cd751ba3..9eb8ac564e 100644 +--- a/Makefile ++++ b/Makefile +@@ -592,6 +592,7 @@ KBUILD_CFLAGS += -O2 + endif + + KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector) ++KBUILD_CFLAGS += $(call cc-option,-fno-PIE) + KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks) + + KBUILD_CFLAGS += -g +-- +2.19.1 + diff --git a/recipes-bsp/u-boot/u-boot-ti-staging_2018.01.bb b/recipes-bsp/u-boot/u-boot-ti-staging_2018.01.bb index cbb8857a..c9c97111 100644 --- a/recipes-bsp/u-boot/u-boot-ti-staging_2018.01.bb +++ b/recipes-bsp/u-boot/u-boot-ti-staging_2018.01.bb @@ -5,3 +5,5 @@ PR = "r24" BRANCH = "ti-u-boot-2018.01" SRCREV = "2cc52408bf1357f11b96548e78223a1df321c1ae" + +SRC_URI += "file://0001-Always-build-with-fno-PIE.patch" -- 2.19.1 -- _______________________________________________ meta-ti mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-ti
