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From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/7] arm: compressed: discard ksymtab/kcrctab sections
Date: Tue, 30 May 2017 18:36:44 +0000	[thread overview]
Message-ID: <20170530183647.28557-5-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20170530183647.28557-1-ard.biesheuvel@linaro.org>

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

  parent reply	other threads:[~2017-05-30 18:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-30 18:36 [PATCH 0/7] ARM: efi: PE/COFF cleanup/hardening Ard Biesheuvel
2017-05-30 18:36 ` [PATCH 1/7] arm: efi: remove forbidden values from the PE/COFF header Ard Biesheuvel
2017-05-30 18:36 ` [PATCH 2/7] arm: efi: remove pointless dummy .reloc section Ard Biesheuvel
2017-05-30 18:36 ` [PATCH 3/7] arm: efi: replace open coded constants with symbolic ones Ard Biesheuvel
2017-05-30 18:36 ` Ard Biesheuvel [this message]
2017-05-30 18:36 ` [PATCH 5/7] arm: efi: split zImage code and data into separate PE/COFF sections Ard Biesheuvel
2017-05-30 18:36 ` [PATCH 6/7] arm: compressed: put zImage header and EFI header in dedicated section Ard Biesheuvel
2017-05-30 18:36 ` [PATCH 7/7] arm: efi: add PE/COFF debug table to EFI header Ard Biesheuvel
2017-06-21 12:20 ` [PATCH 0/7] ARM: efi: PE/COFF cleanup/hardening Ard Biesheuvel

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