linux-kernel - [tip:x86/trampoline] x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 18 Feb 2011 05:19:52 GMT
From:	"tip-bot for H. Peter Anvin" <hpa@...ux.intel.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	castet.matthieu@...e.fr, tglx@...utronix.de, sfr@...b.auug.org.au,
	hpa@...ux.intel.com, rjw@...k.pl
Subject: [tip:x86/trampoline] x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly

Commit-ID:  014eea518af3d141e276664cf40ef3da899eba35
Gitweb:     http://git.kernel.org/tip/014eea518af3d141e276664cf40ef3da899eba35
Author:     H. Peter Anvin <hpa@...ux.intel.com>
AuthorDate: Mon, 14 Feb 2011 18:33:55 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Thu, 17 Feb 2011 21:05:13 -0800

x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly

Make the GDT_ENTRY() macro in  <asm/segment.h> safe for use in
assembly code by guarding the ULL suffixes with _AC() macros.

Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@...el.com>
Cc: Rafael J. Wysocki <rjw@...k.pl>
Cc: Matthieu Castet <castet.matthieu@...e.fr>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>
---
 arch/x86/include/asm/segment.h |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index 231f1c1..cd84f72 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -1,14 +1,16 @@
 #ifndef _ASM_X86_SEGMENT_H
 #define _ASM_X86_SEGMENT_H
 
+#include <linux/const.h>
+
 /* Constructor for a conventional segment GDT (or LDT) entry */
 /* This is a macro so it can be used in initializers */
 #define GDT_ENTRY(flags, base, limit)			\
-	((((base)  & 0xff000000ULL) << (56-24)) |	\
-	 (((flags) & 0x0000f0ffULL) << 40) |		\
-	 (((limit) & 0x000f0000ULL) << (48-16)) |	\
-	 (((base)  & 0x00ffffffULL) << 16) |		\
-	 (((limit) & 0x0000ffffULL)))
+	((((base)  & _AC(0xff000000,ULL)) << (56-24)) |	\
+	 (((flags) & _AC(0x0000f0ff,ULL)) << 40) |	\
+	 (((limit) & _AC(0x000f0000,ULL)) << (48-16)) |	\
+	 (((base)  & _AC(0x00ffffff,ULL)) << 16) |	\
+	 (((limit) & _AC(0x0000ffff,ULL))))
 
 /* Simple and small GDT entries for booting only */
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/