LoongArch: Avoid orphan input sections

Ensure that all input sections are listed explicitly in the linker
script, and issue a warning otherwise. This ensures that the binary
image matches the PE/COFF and other image metadata exactly, which is
important for things like code signing.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 26aeb14..3bc5b91 100644 (file)
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -51,6 +51,7 @@ config LOONGARCH
        select ARCH_USE_CMPXCHG_LOCKREF
        select ARCH_USE_QUEUED_RWLOCKS
        select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+       select ARCH_WANT_LD_ORPHAN_WARN
        select ARCH_WANTS_NO_INSTR
        select BUILDTIME_TABLE_SORT
        select COMMON_CLK

diff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S
index 69c76f2..f4831df 100644 (file)
--- a/arch/loongarch/kernel/vmlinux.lds.S
+++ b/arch/loongarch/kernel/vmlinux.lds.S
@@ -77,6 +77,8 @@ SECTIONS
        PERCPU_SECTION(1 << CONFIG_L1_CACHE_SHIFT)
 #endif
 
+       .rela.dyn : ALIGN(8) { *(.rela.dyn) *(.rela*) }
+
        .init.bss : {
                *(.init.bss)
        }