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[PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit

From Borislav Petkov <bp@suse.de>
Newsgroups linux.kernel
Subject [PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit
Date 2016-07-27 10:20 +0200
Message-ID <rZsel-5j9-13@gated-at.bofh.it> (permalink)
References <rZ7jz-lC-11@gated-at.bofh.it> <rZeuK-4Z7-29@gated-at.bofh.it> <rZhiW-6Jx-13@gated-at.bofh.it> <rZpTb-3KT-3@gated-at.bofh.it>
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From: Borislav Petkov <bp@suse.de>

... in order to avoid ifdeffery in code computing the ASLR randomization
offset.

Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/page_32_types.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/page_32_types.h b/arch/x86/include/asm/page_32_types.h
index 3a52ee0e726d..3bae4969ac65 100644
--- a/arch/x86/include/asm/page_32_types.h
+++ b/arch/x86/include/asm/page_32_types.h
@@ -13,7 +13,8 @@
  * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
  * and CONFIG_HIGHMEM64G options in the kernel configuration.
  */
-#define __PAGE_OFFSET		_AC(CONFIG_PAGE_OFFSET, UL)
+#define __PAGE_OFFSET_BASE	_AC(CONFIG_PAGE_OFFSET, UL)
+#define __PAGE_OFFSET		__PAGE_OFFSET_BASE
 
 #define __START_KERNEL_map	__PAGE_OFFSET
 
-- 
2.8.4


-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--

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Thread

[PATCH] x86/microcode/intel: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY Borislav Petkov <bp@alien8.de> - 2016-07-26 12:00 +0200
  [tip:x86/microcode] x86/microcode/intel: Fix initrd loading with  CONFIG_RANDOMIZE_MEMORY=y tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-07-26 19:40 +0200
    Re: [tip:x86/microcode] x86/microcode/intel: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y Kees Cook <keescook@chromium.org> - 2016-07-26 22:40 +0200
      Re: [tip:x86/microcode] x86/microcode/intel: Fix initrd loading with  CONFIG_RANDOMIZE_MEMORY=y Borislav Petkov <bp@suse.de> - 2016-07-27 07:50 +0200
        [PATCH -v2 2/2] x86/microcode/intel: Fix initrd loading with  CONFIG_RANDOMIZE_MEMORY Borislav Petkov <bp@suse.de> - 2016-07-27 10:20 +0200
        [PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit Borislav Petkov <bp@suse.de> - 2016-07-27 10:20 +0200
          Re: [PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit Ingo Molnar <mingo@kernel.org> - 2016-07-27 11:10 +0200
            Re: [PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit Borislav Petkov <bp@suse.de> - 2016-07-27 11:20 +0200
              Re: [PATCH -v2 1/2] x86/asm: Add __PAGE_OFFSET_BASE define on 32-bit Ingo Molnar <mingo@kernel.org> - 2016-07-27 12:40 +0200
                [PATCH] x86/asm, microcode: Add __PAGE_OFFSET_BASE define on 32-bit Borislav Petkov <bp@suse.de> - 2016-07-27 14:10 +0200
                [tip:x86/microcode] x86/asm, x86/microcode: Add __PAGE_OFFSET_BASE  define on 32-bit tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-07-27 19:20 +0200

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