Commit 8ad57add authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

powerpc/build: vdso linker warning for orphan sections 



Add --orphan-handlin for vdsos, and adjust vdso linker scripts to deal
with orphan sections.

Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230609051002.3342-1-npiggin@gmail.com
parent b4bda59b

arch/powerpc/kernel/vdso/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -56,6 +56,8 @@ KCSAN_SANITIZE := n 
ccflags-y := -fno-common -fno-builtin

ldflags-y := -Wl,--hash-style=both -nostdlib -shared -z noexecstack

ldflags-$(CONFIG_LD_IS_LLD) += $(call cc-option,--ld-path=$(LD),-fuse-ld=lld)

ldflags-$(CONFIG_LD_ORPHAN_WARN) += -Wl,--orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)



# Filter flags that clang will warn are unused for linking

ldflags-y += $(filter-out $(CC_AUTO_VAR_INIT_ZERO_ENABLER) $(CC_FLAGS_FTRACE) -Wa$(comma)%, $(KBUILD_CFLAGS))

arch/powerpc/kernel/vdso/vdso32.lds.S

+3 −1
Original line number Diff line number Diff line
@@ -83,9 +83,11 @@ SECTIONS 


	/DISCARD/	: {

		*(.note.GNU-stack)

		*(*.EMB.apuinfo)

		*(.branch_lt)

		*(.data .data.* .gnu.linkonce.d.* .sdata*)

		*(.bss .sbss .dynbss .dynsbss)

		*(.got1)

		*(.got1 .glink .iplt .rela*)

	}

}

arch/powerpc/kernel/vdso/vdso64.lds.S

+3 −1
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ SECTIONS 
	. = ALIGN(16);

	.text		: {

		*(.text .stub .text.* .gnu.linkonce.t.* __ftr_alt_*)

		*(.sfpr .glink)

		*(.sfpr)

	}						:text

	PROVIDE(__etext = .);

	PROVIDE(_etext = .);
@@ -81,10 +81,12 @@ SECTIONS 


	/DISCARD/	: {

		*(.note.GNU-stack)

		*(*.EMB.apuinfo)

		*(.branch_lt)

		*(.data .data.* .gnu.linkonce.d.* .sdata*)

		*(.bss .sbss .dynbss .dynsbss)

		*(.opd)

		*(.glink .iplt .plt .rela*)

	}

}