Re: [PATCH 1/2] powerpc/vmlinux.lds: Explicitly retain .gnu.hash
From: Alan Modra <hidden>
Date: 2020-02-27 06:23:41
On Thu, Feb 27, 2020 at 03:59:32PM +1100, Michael Ellerman wrote:
Relocatable kernel builds produce a warning about .gnu.hash being an
orphan section:
ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash'
If we try to discard it the build fails:
ld -EL -m elf64lppc -pie --orphan-handling=warn --build-id -o
.tmp_vmlinux1 -T ./arch/powerpc/kernel/vmlinux.lds --whole-archive
arch/powerpc/kernel/head_64.o arch/powerpc/kernel/entry_64.o
...
sound/built-in.a net/built-in.a virt/built-in.a --no-whole-archive
--start-group lib/lib.a --end-group
ld: could not find section .gnu.hash
So add an entry to explicitly retain it, as we do for .hash.Looks fine to me. You can also pass --hash-style=sysv to ld (since binutils-2.18) to disable generation of .gnu.hash.
quoted hunk ↗ jump to hunk
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> --- arch/powerpc/kernel/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+)diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index b4c89a1acebb..31a0f201fb6f 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S@@ -256,6 +256,7 @@ SECTIONS *(.dynamic) } .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) } + .gnu.hash : AT(ADDR(.gnu.hash) - LOAD_OFFSET) { *(.gnu.hash) } .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) } .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET) {-- 2.21.1
-- Alan Modra Australia Development Lab, IBM