linux-kernel - [PATCH] powerpc: Discard .rela* sections if CONFIG

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Date:   Mon, 27 Apr 2020 14:16:28 -0700
From:   "H.J. Lu" <hjl.tools@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...e.de>,
        "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc: Discard .rela* sections if CONFIG_RELOCATABLE is undefined

arch/powerpc/kernel/vmlinux.lds.S has

        DISCARDS
        /DISCARD/ : {
                *(*.EMB.apuinfo)
                *(.glink .iplt .plt .rela* .comment)
                *(.gnu.version*)
                *(.gnu.attributes)
                *(.eh_frame)
        }

Since .rela* sections are needed when CONFIG_RELOCATABLE is defined,
change to discard .rela* sections if CONFIG_RELOCATABLE is undefined.

Signed-off-by: H.J. Lu <hjl.tools@...il.com>
Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)
---
 arch/powerpc/kernel/vmlinux.lds.S | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 31a0f201fb6f..4ba07734a210 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -366,9 +366,12 @@ SECTIONS
 	DISCARDS
 	/DISCARD/ : {
 		*(*.EMB.apuinfo)
-		*(.glink .iplt .plt .rela* .comment)
+		*(.glink .iplt .plt .comment)
 		*(.gnu.version*)
 		*(.gnu.attributes)
 		*(.eh_frame)
+#ifndef CONFIG_RELOCATABLE
+		*(.rela*)
+#endif
 	}
 }
-- 
2.25.4