linux-kernel - [PATCH 3/4] arm64: LLVMLinux: Calculate current_thread_info from current_stack

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <1406764649-20326-4-git-send-email-behanw@converseincode.com>
Date:	Wed, 30 Jul 2014 16:57:28 -0700
From:	behanw@...verseincode.com
To:	ard.biesheuvel@...aro.org, catalin.marinas@....com,
	k.khlebnikov@...sung.com, olof@...om.net, peterz@...radead.org,
	takahiro.akashi@...aro.org, tglx@...utronix.de, will.deacon@....com
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	mingo@...nel.org, dwmw2@...radead.org,
	Behan Webster <behanw@...verseincode.com>,
	Mark Charlebois <charlebm@...il.com>
Subject: [PATCH 3/4] arm64: LLVMLinux: Calculate current_thread_info from current_stack_pointer

From: Behan Webster <behanw@...verseincode.com>

Use the global current_stack_pointer to get the value of the stack pointer.
This change supports being able to compile the kernel with both gcc and clang.

Signed-off-by: Behan Webster <behanw@...verseincode.com>
Signed-off-by: Mark Charlebois <charlebm@...il.com>
Reviewed-by: Jan-Simon M??ller <dl9pf@....de>
---
 arch/arm64/include/asm/thread_info.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index e6b6094..c2432d2 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -80,8 +80,8 @@ static inline struct thread_info *current_thread_info(void) __attribute_const__;
 
 static inline struct thread_info *current_thread_info(void)
 {
-	register unsigned long sp asm ("sp");
-	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
+	return (struct thread_info *) \
+		(current_stack_pointer & ~(THREAD_SIZE - 1));
 }
 
 #define thread_saved_pc(tsk)	\
-- 
1.9.1

--
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/