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List:       linux-efi
Subject:    [PATCH 4/7] arm: compressed: discard ksymtab/kcrctab sections
From:       Ard Biesheuvel <ard.biesheuvel () linaro ! org>
Date:       2017-05-30 18:36:44
Message-ID: 20170530183647.28557-5-ard.biesheuvel () linaro ! org
[Download RAW message or body]

With UEFI support added to the decompressor, we may end up including
C code that is part of the kernel proper, but is rebuilt for the
decompressor. This may result in ksymtab/kcrctab metadata being
duplicated into the decompressor, so discard such regions explicitly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 arch/arm/boot/compressed/vmlinux.lds.S | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/compressed/vmlinux.lds.S b/arch/arm/boot/compressed/vmlinux.lds.S
index 81c493156ce8..1fa62432e283 100644
--- a/arch/arm/boot/compressed/vmlinux.lds.S
+++ b/arch/arm/boot/compressed/vmlinux.lds.S
@@ -29,6 +29,11 @@ SECTIONS
      * of the text/got segments.
      */
     *(.data)
+    /*
+     * C code that is shared with the kernel proper (but rebuilt for the
+     * decompressor) may contain exports that we have no use for here.
+     */
+    *(*ksymtab* *kcrctab*)
   }
 
   . = TEXT_START;
-- 
2.9.3

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