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

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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>
This commit is contained in:
Laura Abbott 2011-10-06 20:53:14 +01:00 committed by Russell King
parent 4bdad983a4
commit 01885bc5ce
1 changed files with 8 additions and 0 deletions
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8
arch/arm/lib/div64.S
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@ -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)