Commit 01885bc5 authored Oct 06, 2011 by Laura Abbott Committed by Russell King Oct 17, 2011

ARM: 7125/1: Add unwinding annotations for 64bit division functions



The 64bit division functions never had unwinding annotations
added. This prevents a backtrace from being printed within
the function and if a division by 0 occurs. Add the annotations.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 4bdad983

arch/arm/lib/div64.S

+8 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,7 @@
		*/

		#include <linux/linkage.h>
		#include <asm/unwind.h>

		#ifdef __ARMEB__
		#define xh r0
		@@ -44,6 +45,7 @@
		*/

		ENTRY(__do_div64)
		UNWIND(.fnstart)

		@ Test for easy paths first.
		subs ip, r4, #1
		@@ -189,7 +191,12 @@ ENTRY(__do_div64)
		moveq yh, xh
		moveq xh, #0
		moveq pc, lr
		UNWIND(.fnend)

		UNWIND(.fnstart)
		UNWIND(.pad #4)
		UNWIND(.save {lr})
		Ldiv0_64:
		@ Division by 0:
		str lr, [sp, #-8]!
		bl __div0
		@@ -200,4 +207,5 @@ ENTRY(__do_div64)
		mov xh, #0
		ldr pc, [sp], #8

		UNWIND(.fnend)
		ENDPROC(__do_div64)