linux-kernel - [PATCH] ix86: unwind-annotate thunk

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Message-Id: <542291CA0200007800038085@mail.emea.novell.com>
Date:	Wed, 24 Sep 2014 08:41:30 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	<mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] ix86: unwind-annotate thunk_32.S

Signed-off-by: Jan Beulich <jbeulich@...e.com>
---
 arch/x86/lib/thunk_32.S |   21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

--- 3.17-rc6/arch/x86/lib/thunk_32.S
+++ 3.17-rc6-ix86-annotate-thunks/arch/x86/lib/thunk_32.S
@@ -6,22 +6,31 @@
  */
 	#include <linux/linkage.h>
 	#include <asm/asm.h>
+	#include <asm/dwarf2.h>
 
 #ifdef CONFIG_TRACE_IRQFLAGS
 	/* put return address in eax (arg1) */
 	.macro thunk_ra name,func
 	.globl \name
 \name:
-	pushl %eax
-	pushl %ecx
-	pushl %edx
+	CFI_STARTPROC
+	pushl_cfi %eax
+	CFI_REL_OFFSET eax, 0
+	pushl_cfi %ecx
+	CFI_REL_OFFSET ecx, 0
+	pushl_cfi %edx
+	CFI_REL_OFFSET edx, 0
 	/* Place EIP in the arg1 */
 	movl 3*4(%esp), %eax
 	call \func
-	popl %edx
-	popl %ecx
-	popl %eax
+	popl_cfi %edx
+	CFI_RESTORE edx
+	popl_cfi %ecx
+	CFI_RESTORE ecx
+	popl_cfi %eax
+	CFI_RESTORE eax
 	ret
+	CFI_ENDPROC
 	_ASM_NOKPROBE(\name)
 	.endm
 



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