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-rw-r--r--arch/loongarch/Makefile22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
index d592b9df95c4..f4cb54d5afd6 100644
--- a/arch/loongarch/Makefile
+++ b/arch/loongarch/Makefile
@@ -43,15 +43,37 @@ endif
cflags-y += -G0 -pipe -msoft-float
LDFLAGS_vmlinux += -G0 -static -n -nostdlib
+
+# When the assembler supports explicit relocation hint, we must use it.
+# GCC may have -mexplicit-relocs off by default if it was built with an old
+# assembler, so we force it via an option.
+#
+# When the assembler does not supports explicit relocation hint, we can't use
+# it. Disable it if the compiler supports it.
+#
+# If you've seen "unknown reloc hint" message building the kernel and you are
+# now wondering why "-mexplicit-relocs" is not wrapped with cc-option: the
+# combination of a "new" assembler and "old" compiler is not supported. Either
+# upgrade the compiler or downgrade the assembler.
+ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS
+cflags-y += -mexplicit-relocs
+KBUILD_CFLAGS_KERNEL += -mdirect-extern-access
+else
+cflags-y += $(call cc-option,-mno-explicit-relocs)
KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs
KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
+endif
cflags-y += -ffreestanding
cflags-y += $(call cc-option, -mno-check-zero-division)
+ifndef CONFIG_PHYSICAL_START
load-y = 0x9000000000200000
+else
+load-y = $(CONFIG_PHYSICAL_START)
+endif
bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y)
drivers-$(CONFIG_PCI) += arch/loongarch/pci/