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Message-Id: <20200228000105.165012-3-thgarnie@chromium.org>
Date: Thu, 27 Feb 2020 16:00:47 -0800
From: Thomas Garnier <thgarnie@...omium.org>
To: kernel-hardening@...ts.openwall.com
Cc: kristen@...ux.intel.com,
keescook@...omium.org,
Thomas Garnier <thgarnie@...omium.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
"H. Peter Anvin" <hpa@...or.com>,
x86@...nel.org,
Peter Zijlstra <peterz@...radead.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Will Deacon <will@...nel.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH v11 02/11] x86: Add macro to get symbol address for PIE support
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@...omium.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)
--
2.25.1.481.gfbce0eb801-goog
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