[PATCH] efi_loader: Fix link of EFI apps with ld.lld

Alistair Delva adelva at google.com
Wed Oct 20 23:31:31 CEST 2021

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

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 at google.com>
Cc: Heinrich Schuchardt <xypron.glpk at gmx.de>
Cc: Nick Desaulniers <ndesaulniers at google.com>
 scripts/Makefile.lib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 07696e86bb..39f03398ed 100644
--- 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)

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