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From: Thomas Garnier <thgarnie@chromium.org>
To: kernel-hardening@lists.openwall.com
Cc: kristen@linux.intel.com, keescook@chromium.org,
	Thomas Garnier <thgarnie@chromium.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Will Deacon <will@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v10 02/11] x86: Add macro to get symbol address for PIE support
Date: Wed,  4 Dec 2019 16:09:39 -0800	[thread overview]
Message-ID: <20191205000957.112719-3-thgarnie@chromium.org> (raw)
In-Reply-To: <20191205000957.112719-1-thgarnie@chromium.org>

Add a new _ASM_MOVABS macro to fetch a symbol address. Replace
"_ASM_MOV $<symbol>, %dst" code construct that are not compatible with
PIE.

Signed-off-by: Thomas Garnier <thgarnie@chromium.org>
---
 arch/x86/include/asm/asm.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index cd339b88d5d4..644bdbf149ee 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -32,6 +32,7 @@
 #define _ASM_ALIGN	__ASM_SEL(.balign 4, .balign 8)
 
 #define _ASM_MOV	__ASM_SIZE(mov)
+#define _ASM_MOVABS	__ASM_SEL(movl, movabsq)
 #define _ASM_INC	__ASM_SIZE(inc)
 #define _ASM_DEC	__ASM_SIZE(dec)
 #define _ASM_ADD	__ASM_SIZE(add)
-- 
2.24.0.393.g34dc348eaf-goog


  parent reply	other threads:[~2019-12-05  0:10 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-05  0:09 [PATCH v10 00/11] x86: PIE support to extend KASLR randomization Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 01/11] x86/crypto: Adapt assembly for PIE support Thomas Garnier
2019-12-18 12:46   ` Borislav Petkov
2019-12-18 16:35     ` Thomas Garnier
2019-12-18 16:45       ` Borislav Petkov
2019-12-05  0:09 ` Thomas Garnier [this message]
2019-12-05  0:09 ` [PATCH v10 03/11] x86: relocate_kernel - " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 04/11] x86/entry/64: " Thomas Garnier
2019-12-05  9:03   ` Peter Zijlstra
2019-12-05 17:01     ` Thomas Garnier
2019-12-06 10:26       ` Peter Zijlstra
2019-12-06 16:35         ` Thomas Garnier
2019-12-20 16:05           ` Borislav Petkov
2019-12-05  0:09 ` [PATCH v10 05/11] x86: pm-trace - " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 06/11] x86/CPU: " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 07/11] x86/acpi: " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 08/11] x86/boot/64: " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 09/11] x86/power/64: " Thomas Garnier
2019-12-05  0:09 ` [PATCH v10 10/11] x86/paravirt: " Thomas Garnier
2019-12-23 17:23   ` Borislav Petkov
2019-12-24 10:04     ` Borislav Petkov
2019-12-05  0:09 ` [PATCH v10 11/11] x86/alternatives: " Thomas Garnier
2019-12-19 13:34 ` [PATCH v10 00/11] x86: PIE support to extend KASLR randomization Peter Zijlstra
2019-12-19 16:35   ` Thomas Garnier
2019-12-24 13:03 ` Borislav Petkov
2019-12-30 18:52   ` Kees Cook

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