efi_loader: Fix link of EFI apps with ld.lld

When compiling U-Boot with ld.lld as the linker, the helloworld EFI app
example fails to link:

LD      lib/efi_loader/helloworld_efi.so
ld.lld: error: section: .dynamic is not contiguous with other relro
                        sections

LLD will always create RELRO program header regardless of target
emulation, whereas BFD may automatically disable it for unsupported
targets. Add -znorelro to disable it explicitly in all cases.

Signed-off-by: Alistair Delva <adelva@google.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 07696e8..39f0339 100644 (file)
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -403,7 +403,7 @@ $(obj)/%.efi: $(obj)/%_efi.so
 
 quiet_cmd_efi_ld = LD      $@
 cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \
-               -Bsymbolic -s $^ -o $@
+               -Bsymbolic -znorelro -s $^ -o $@
 
 EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)