All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org
Cc: matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org,
	leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	Ard Biesheuvel
	<ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: [PATCH v2 4/7] arm: compressed: discard ksymtab/kcrctab sections
Date: Thu, 29 Jun 2017 08:18:46 +0000	[thread overview]
Message-ID: <20170629081849.15081-5-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20170629081849.15081-1-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.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.

Cc: Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.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

WARNING: multiple messages have this Message-ID (diff)
From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/7] arm: compressed: discard ksymtab/kcrctab sections
Date: Thu, 29 Jun 2017 08:18:46 +0000	[thread overview]
Message-ID: <20170629081849.15081-5-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20170629081849.15081-1-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.

Cc: Russell King <linux@armlinux.org.uk>
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:[~2017-06-29  8:18 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-29  8:18 [PATCH v2 0/7] ARM: efi: PE/COFF cleanup/hardening Ard Biesheuvel
2017-06-29  8:18 ` Ard Biesheuvel
     [not found] ` <20170629081849.15081-1-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-06-29  8:18   ` [PATCH v2 1/7] arm: efi: remove forbidden values from the PE/COFF header Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel
2017-06-29  8:18   ` [PATCH v2 2/7] arm: efi: remove pointless dummy .reloc section Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel
2017-06-29  8:18   ` [PATCH v2 3/7] arm: efi: replace open coded constants with symbolic ones Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel
2017-06-29  8:18   ` Ard Biesheuvel [this message]
2017-06-29  8:18     ` [PATCH v2 4/7] arm: compressed: discard ksymtab/kcrctab sections Ard Biesheuvel
2017-06-29  8:18   ` [PATCH v2 5/7] arm: efi: split zImage code and data into separate PE/COFF sections Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel
     [not found]     ` <20170629081849.15081-6-ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-09-08 13:50       ` Gregory CLEMENT
2017-09-08 13:50         ` Gregory CLEMENT
     [not found]         ` <87r2vhs3il.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-09-08 13:54           ` Ard Biesheuvel
2017-09-08 13:54             ` Ard Biesheuvel
     [not found]             ` <CAKv+Gu9DVRE6jGEvdkfWwaJDhmTeaF2-CMi=JdFx3GS2Qqdy3A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-08 14:28               ` Ard Biesheuvel
2017-09-08 14:28                 ` Ard Biesheuvel
     [not found]                 ` <CAKv+Gu9UF7-Dyjijvbc97yEF6zehQMyjOcV=RxFEJkNEebakUw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-08 14:33                   ` Gregory CLEMENT
2017-09-08 14:33                     ` Gregory CLEMENT
     [not found]                     ` <87mv65s1iu.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-09-08 14:48                       ` Ard Biesheuvel
2017-09-08 14:48                         ` Ard Biesheuvel
     [not found]                         ` <CAKv+Gu8e49ZmB6X=H2vE_dw1HA3CyOq0GN7cZOYJ+JpkTftGWA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-08 14:56                           ` Gregory CLEMENT
2017-09-08 14:56                             ` Gregory CLEMENT
     [not found]                             ` <87efrhs0gj.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-09-08 14:57                               ` Ard Biesheuvel
2017-09-08 14:57                                 ` Ard Biesheuvel
     [not found]                                 ` <CAKv+Gu8Aa7Y8SK2nJM2DXZzHbzZT6aq2Rt1wsgaLwz7_C3otJA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-08 15:11                                   ` Ard Biesheuvel
2017-09-08 15:11                                     ` Ard Biesheuvel
     [not found]                                     ` <CAKv+Gu8hcT=_1iF4gaS==uGQWAb9-i0Y=XJ-MqgfQQyn1RmGtQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-09-08 15:17                                       ` Gregory CLEMENT
2017-09-08 15:17                                         ` Gregory CLEMENT
     [not found]                                         ` <87a825rzio.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-09-08 15:18                                           ` Ard Biesheuvel
2017-09-08 15:18                                             ` Ard Biesheuvel
2017-06-29  8:18   ` [PATCH v2 6/7] arm: compressed: put zImage header and EFI header in dedicated section Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel
2017-06-29  8:18   ` [PATCH v2 7/7] arm: efi: add PE/COFF debug table to EFI header Ard Biesheuvel
2017-06-29  8:18     ` Ard Biesheuvel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170629081849.15081-5-ard.biesheuvel@linaro.org \
    --to=ard.biesheuvel-qsej5fyqhm4dnm+yrofe0a@public.gmane.org \
    --cc=leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
    --cc=linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org \
    --cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
    --cc=linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.