[v2,1/3] powerpc: Discard more sections in linker script

Message ID 20181204005429.32681-2-joel@jms.id.au
State Superseded
Headers show
Series
  • powerpc: Add to linker script discards
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Commit Message

Joel Stanley Dec. 4, 2018, 12:54 a.m.
Building the ppc64 kernel with a modern binutils results in this
warning:

 powerpc64le-linux-gnu-ld: warning: orphan section `.gnu.hash' from
 `linker stubs' being placed in section `.gnu.hash'

Alan Modra <amodra@gmail.com> explains:

 > .gnu.hash, like .hash, is used by glibc ld.so for dynamic symbol
 > lookup.  I imagine you don't need either section in a kernel, so
 > discarding both sounds reasonable.  Likely you could discard .interp
 > and .dynstr too, and .dynsym when !CONFIG_PPC32.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
See https://lore.kernel.org/lkml/CACPK8Xft3n5KkpTjN3=7_VUCXHFcK7mxvZm2Rrqu7tppcBoyOg@mail.gmail.com/T/#m58532c86cf0c7b4fb01cc1fe724e48d4c7d8e4a7
---
 arch/powerpc/kernel/vmlinux.lds.S | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 434581bcd5b4..6570209b0671 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -279,8 +279,6 @@  SECTIONS
 		__dynamic_start = .;
 		*(.dynamic)
 	}
-	.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
-	.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
 	.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
 	{
 		__rela_dyn_start = .;
@@ -388,5 +386,8 @@  SECTIONS
 		*(.gnu.version*)
 		*(.gnu.attributes)
 		*(.eh_frame)
+		*(.hash .gnu.hash)
+		*(.interp)
+		*(.dynstr)
 	}
 }