The ARM linker may emit veneers, i.e., trampolines, when ordinary direct relative branches cannot be used, e.g., for Thumb interworking or branch targets that are out of range.
Usually, such veneers carry an absolute reference to the branch target, which is problematic for us, since these absolute references are not covered by annotations that are visible to GenFw in the PE/COFF conversion, and so these absolute references are not fixed up by the PE/COFF loader at runtime. So switch to all ARM GNU ld toolchains to position independent veneers. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org> --- BaseTools/Conf/tools_def.template | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template index 2ba833e1fb06..902680c24c85 100755 --- a/BaseTools/Conf/tools_def.template +++ b/BaseTools/Conf/tools_def.template @@ -4150,7 +4150,7 @@ DEFINE GCC_DLINK_FLAGS_COMMON = -nostdlib --pie DEFINE GCC_DLINK2_FLAGS_COMMON = -Wl,--script=$(EDK_TOOLS_PATH)/Scripts/GccBase.lds DEFINE GCC_IA32_X64_DLINK_COMMON = DEF(GCC_DLINK_FLAGS_COMMON) --gc-sections DEFINE GCC_ARM_AARCH64_DLINK_COMMON= -Wl,--emit-relocs -nostdlib -Wl,--gc-sections -u $(IMAGE_ENTRY_POINT) -Wl,-e,$(IMAGE_ENTRY_POINT),-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map -DEFINE GCC_ARM_DLINK_FLAGS = DEF(GCC_ARM_AARCH64_DLINK_COMMON) -z common-page-size=0x20 +DEFINE GCC_ARM_DLINK_FLAGS = DEF(GCC_ARM_AARCH64_DLINK_COMMON) -z common-page-size=0x20 -Wl,--pic-veneer DEFINE GCC_AARCH64_DLINK_FLAGS = DEF(GCC_ARM_AARCH64_DLINK_COMMON) -z common-page-size=0x20 DEFINE GCC_ARM_AARCH64_ASLDLINK_FLAGS = -Wl,--defsym=PECOFF_HEADER_SIZE=0 DEF(GCC_DLINK2_FLAGS_COMMON) -z common-page-size=0x20 DEFINE GCC_IA32_X64_ASLDLINK_FLAGS = DEF(GCC_IA32_X64_DLINK_COMMON) --entry _ReferenceAcpiTable -u $(IMAGE_ENTRY_POINT) -- 2.19.2 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
